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Posted to commits@mesos.apache.org by gi...@apache.org on 2018/06/28 18:45:16 UTC
[23/50] mesos-site git commit: Updated the website built from mesos
SHA: 7c9c72d.
http://git-wip-us.apache.org/repos/asf/mesos-site/blob/09fd0301/content/api/latest/c++/linux_2cgroups_8hpp_source.html
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<div class="title">cgroups.hpp</div> </div>
</div><!--header-->
<div class="contents">
-<a href="linux_2cgroups_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Licensed to the Apache Software Foundation (ASF) under one</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// or more contributor license agreements. See the NOTICE file</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// distributed with this work for additional information</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// regarding copyright ownership. The ASF licenses this file</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// to you under the Apache License, Version 2.0 (the</span></div><div class="line"><a name="l00006"></a><s
pan class="lineno"> 6</span> <span class="comment">// "License"); you may not use this file except in compliance</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// with the License. You may obtain a copy of the License at</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">//</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">//</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// di
stributed under the License is distributed on an "AS IS" BASIS,</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">// limitations under the License.</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#ifndef __CGROUPS_HPP__</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#define __CGROUPS_HPP__</span></div><div class="line"><a name="l
00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <stdint.h></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <stdlib.h></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <set></span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div><div class="line"><a name="l00027"></a><span class="lineno"> 27</
span> <span class="preprocessor">#include <sys/types.h></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="code" href="future_8hpp.html">process/future.hpp</a>></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="timeout_8hpp.html">process/timeout.hpp</a>></span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <<a class="code" href="bytes_8hpp.html">stout/bytes.hpp</a>></span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <<a class="code" href="duration_8hpp.html">s
tout/duration.hpp</a>></span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <<a class="code" href="hashmap_8hpp.html">stout/hashmap.hpp</a>></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <<a class="code" href="nothing_8hpp.html">stout/nothing.hpp</a>></span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <<a class="code" href="option_8hpp.html">stout/option.hpp</a>></span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include <<a class="code" href="try_8hpp.html">stout/try.hpp</a>></span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="namespacecgroup
s.html"> 39</a></span> <span class="keyword">namespace </span><a class="code" href="namespacecgroups.html">cgroups</a> {</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// Suggested timeout for use with the convenience version of</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// cgroups::destroy(); it is not a default timeout and must be</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">// explicitly specified.</span></div><div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="namespacecgroups.html#a3e497aa6d62c407000dffd5f0516a53c"> 44</a></span> <span class="keyword">const</span> <a class="code" href="classDuration.html">Duration</a> <a class="code" href="namespacecgroups.html#
a3e497aa6d62c407000dffd5f0516a53c">DESTROY_TIMEOUT</a> = <a class="code" href="classSeconds.html">Seconds</a>(60);</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// Freezing a cgroup may get stuck (see MESOS-1689 for details). To</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// workaround, we may want to thaw the cgroup and retry freezing it.</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">// This is the suggested retry interval.</span></div><div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="namespacecgroups.html#a5207e520ebc1a375a7b50532217e77d5"> 50</a></span> <span class="keyword">const</span>
<a class="code" href="classDuration.html">Duration</a> <a class="code" href="namespacecgroups.html#a5207e520ebc1a375a7b50532217e77d5">FREEZE_RETRY_INTERVAL</a> = <a class="code" href="classSeconds.html">Seconds</a>(10);</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// Default number of assign attempts when moving threads to a cgroup.</span></div><div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="namespacecgroups.html#a0dccf61f2e6889ebe2c0e743d969e4c5"> 54</a></span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="namespacecgroups.html#a0dccf61f2e6889ebe2c0e743d969e4c5">THREAD_ASSIGN_RETRIES</a> = 100;</div><div class="line"><a name="l0
0055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment">// We use the following notations throughout the cgroups code. The notations</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment">// here are derived from the kernel documentation. More details can be found in</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">// <kernel-source>/Documentation/cgroups/cgroups.txt.</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment">//</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">// Hierarchy - A hierarchy contains a set of cgroups arranged in a tree such</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span
class="comment">// that every task in the system is in exactly one of the cgroups</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment">// in the hierarchy. One or more subsystems can be attached to a</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">// hierarchy.</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment">// Subsystem - A subsystem (e.g. cpu, memory, cpuset, etc) in the kernel. Each</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment">// subsystem can be attached to only one hierarchy.</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment">// Cgroup - A cgroup is just a set of tasks with a set of controls for one</span></div><
div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment">// or more subsystems.</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment">// Control - A control file in a cgroup (e.g. tasks, cpu.shares).</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment">// TODO(idownes): Rework all functions in this file to better support</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment">// separately mounted subsystems.</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class
="comment">// Prepare a hierarchy which has the specified subsystem (and only that</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment">// subsystem) mounted and also has the specified cgroup created. Returns the</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">// hierarchy. Checks are made to ensure that cgroups are supported and that</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">// nested cgroups can be created.</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <a class="code" href="classTry.html">Try<std::string></a> <a class="code" href="namespacecgroups.html#a4bf20862574beb5b0f9af7799489866f">prepare</a>(</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keyword">const</span> std::string& baseHi
erarchy,</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">const</span> std::string& subsystem,</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups_1_1named.html#a90339a144714dee1c97f9e34553ace0e">cgroup</a>);</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment">// Check whether cgroups module is enabled on the current machine.</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment">// @return True if cgroups module is enabled.</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span cla
ss="comment">// False if cgroups module is not available.</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="keywordtype">bool</span> <a class="code" href="namespacecgroups.html#a549f051f3df2b570aef0ee2b806020e3">enabled</a>();</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment">// Return the currently active hierarchies.</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment">// @return A set of active hierarchy paths (e.g., '/cgroup').</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment">// Error if unexpected happens.</span></div><div class="line"><a name="l00093"></a><spa
n class="lineno"> 93</span> <a class="code" href="classTry.html">Try<std::set<std::string></a>> <a class="code" href="namespacecgroups.html#adabca75358eab66d19aaed528dd251d7">hierarchies</a>();</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">// Get an already mounted hierarchy that has 'subsystems' attached.</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment">// This function will return an error if we are unable to find the</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">// hierarchies or if we are unable to find if the subsystems are</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</
span> <span class="comment">// mounted at a given hierarchy.</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">// @param subsystems Comma-separated subsystem names.</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">// @return Path to the hierarchy root, if a hierarchy with all the</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment">// given subsystems mounted exists.</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment">// None, if no such hierarchy exists.</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment">// Error, if the operation fails.</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <a class="code" href="classR
esult.html">Result<std::string></a> <a class="code" href="namespacecgroups.html#ad675453425dc290064c609351f2e3363">hierarchy</a>(<span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#a43ff5aa5dec5f24b0a3620847e9dd6b6">subsystems</a>);</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment">// Check whether all the given subsystems are enabled on the current machine.</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment">// @param subsystems Comma-separated subsystem names.</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment">// @return True if all the given subsystems are enabled.</span></div><div class="
line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment">// False if any of the given subsystems is not enabled.</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment">// Error if something unexpected happens.</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <a class="code" href="classTry.html">Try<bool></a> <a class="code" href="namespacecgroups.html#a549f051f3df2b570aef0ee2b806020e3">enabled</a>(<span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#a43ff5aa5dec5f24b0a3620847e9dd6b6">subsystems</a>);</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment">// Return true if any
of the given subsystems is currently attached to a</span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment">// hierarchy.</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment">// @param subsystems Comma-separated subsystem names.</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment">// @return True if any of the given subsystems is being attached.</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment">// False if non of the given subsystems is being attached.</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment">// Error if something unexpected happens.</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <a class="code" href="classTry.html">Tr
y<bool></a> <a class="code" href="namespacecgroups.html#a56d29749c5955372d012171f5c9b1724">busy</a>(<span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#a43ff5aa5dec5f24b0a3620847e9dd6b6">subsystems</a>);</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment">// Return the currently enabled subsystems.</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment">// @return A set of enabled subsystem names if succeeds.</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment">// Error if unexpected happens.</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <a class="cod
e" href="classTry.html">Try<std::set<std::string></a>> <a class="code" href="namespacecgroups.html#a43ff5aa5dec5f24b0a3620847e9dd6b6">subsystems</a>();</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment">// Return a set of subsystems that are attached to a given hierarchy. An error</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment">// will be returned if the given hierarchy is not currently mounted with a</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment">// cgroups virtual file system. As a result, this function can be used to check</span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class=
"comment">// whether a hierarchy is indeed a cgroups hierarchy root.</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment">// @return A set of attached subsystem names.</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment">// Error otherwise, (e.g., hierarchy does not exist or is not mounted).</span></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <a class="code" href="classTry.html">Try<std::set<std::string></a>> <a class="code" href="namespacecgroups.html#a43ff5aa5dec5f24b0a3620847e9dd6b6">subsystems</a>(<span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#ad675453425dc290064c609351f2e3363">hierarchy</a>);</
div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="comment">// Mount a cgroups hierarchy and attach the given subsystems to</span></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment">// it. This function will return error if the path given for the</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment">// hierarchy already exists. Also, the function will return error if</span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment">// a subsystem in the given subsystem list has already been attached</span></div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment">// to ano
ther hierarchy. On success, the cgroups virtual file system</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment">// will be mounted with the proper subsystems attached. On failure,</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment">// mount will be retried the specified number of times.</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment">// @param subsystems Comma-separated subsystem names.</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment">// @param retry Number of times to retry mount.</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>
0;<span class="comment">// @return Some if the operation succeeds.</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment">// Error if the operation fails.</span></div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacecgroups.html#aa3c1a4d4d11cca392dc45ff363718fc1">mount</a>(</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#ad675453425dc290064c609351f2e3363">hierarchy</a>,</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#a43ff5aa5dec5f24b0a3620847e9dd6b6">subsystems</a>,</div><div class="line"><a name="l00156"></a><span class="lineno"> 1
56</span>  <span class="keywordtype">int</span> retry = 0);</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment">// Unmount a hierarchy and remove the directory associated with</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment">// it. This function will return error if the given hierarchy is not</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment">// valid. Also, it will return error if the given hierarchy has</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment">// any cgroups.</span></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comm
ent">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment">// @return Some if the operation succeeds.</span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment">// Error if the operation fails.</span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacecgroups.html#af94090b7b947fde2603c22b609650c9b">unmount</a>(<span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#ad675453425dc290064c609351f2e3363">hierarchy</a>);</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span> </div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div><div class="line"><a name="l00169"></a><span class="lineno"> 169</sp
an> <span class="comment">// Returns true if the given hierarchy root is mounted as a cgroups</span></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment">// virtual file system with the specified subsystems attached.</span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment">// @return True if the given directory is a hierarchy root and all of the</span></div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment">// specified subsystems are attached.</span></div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment">// False if the directory is not a hierarchy (or doesn't exist)</span></div><div class="
line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment">// or some of the specified subsystems are not attached.</span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment">// Error if the operation fails.</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <a class="code" href="classTry.html">Try<bool></a> <a class="code" href="namespacecgroups.html#a379912fbd52d8dba056a7d94041a224e">mounted</a>(</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#ad675453425dc290064c609351f2e3363">hierarchy</a>,</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#a43ff5aa5dec5f24b0a3620847e9dd6b6"
>subsystems</a> = <span class="stringliteral">""</span>);</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment">// Create a cgroup under a given hierarchy. This function will return error if</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment">// the given hierarchy is not valid.</span></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186
</span> <span class="comment">// @param recursive Will create nested cgroups</span></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment">// @return Some if the operation succeeds.</span></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment">// Error if the operation fails.</span></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacecgroups.html#a2ecc89636706df947027a4c3c2100fbe">create</a>(</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#ad675453425dc290064c609351f2e3363">hierarchy</a>,</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keyword">const</span> std::
string& <a class="code" href="namespacecgroups_1_1named.html#a90339a144714dee1c97f9e34553ace0e">cgroup</a>,</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordtype">bool</span> recursive = <span class="keyword">false</span>);</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment">// Remove a cgroup under a given hierarchy. This function will return error if</span></div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment">// the given hierarchy or the given cgroup is not valid. The cgroup will NOT be</span></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment">// removed recursively. In other words, if the cgroup h
as sub-cgroups inside,</span></div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="comment">// the function will return error. Also, if any process is attached to the</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment">// given cgroup, the removal operation will also fail.</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <a class="code" href="classTry.html">Try<Nothing></a> <span class="keyword">remove</span>(<span class="keyword">const</span> std::string& <a class="code" href="namespace
cgroups.html#ad675453425dc290064c609351f2e3363">hierarchy</a>, <span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups_1_1named.html#a90339a144714dee1c97f9e34553ace0e">cgroup</a>);</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> </div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="comment">// Returns true if the given cgroup under a given hierarchy exists.</span></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> 
;<span class="comment">// @return True if the cgroup exists.</span></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="comment">// False if the cgroup does not exist.</span></div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="comment">// Error if the operation fails (i.e., hierarchy is not mounted).</span></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <a class="code" href="classTry.html">Try<bool></a> <a class="code" href="namespacecgroups.html#a8a1f39ed37d38f45bf997bbb2f6b791c">exists</a>(<span class="keyword">const</span> std::string& hierarchy, <span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups_1_1named.html#a90339a144714dee1c97f9e34553ace0e">cgroup</a>);</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> </div><div class="line"><a name="l00213"></a><span c
lass="lineno"> 213</span> </div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="comment">// Return all the cgroups under the given cgroup of a given hierarchy. By</span></div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="comment">// default, it returns all the cgroups under the given hierarchy. This function</span></div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment">// will return error if the given hierarchy is not mounted or the cgroup does</span></div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="comment">// not exist. We use a post-order walk here to ease the removal of cgroups.</span></div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00219"></a>
<span class="lineno"> 219</span> <span class="comment">// @return A vector of cgroup names.</span></div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <a class="code" href="classTry.html">Try<std::vector<std::string></a>> <span class="keyword">get</span>(</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups.html#ad675453425dc290064c609351f2e3363">hierarchy</a>,</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keyword">const</span> std::string& <a class="code" href="namespacecgroups_1_1named.html#a90339a144714dee1c97f9e34553ace0e">cgroup</a> = <span class="stringliteral">"/"</span>);</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> </div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> 
</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment">// Send the specified signal to all process in a cgroup.</span></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment">// @param signal The signal to send to all tasks within the cgroup.</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment">// @return Some on success.</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment">// Error if something unexpected h
appens.</span></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacecgroups.html#ab75e1e2d1be63eec907bf12306a7c8a7">kill</a>(</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keyword">const</span> std::string& cgroup,</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordtype">int</span> signal);</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> </div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment">// Read a control file. Control files are used
to monitor and control cgroups.</span></div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="comment">// This function will verify all the parameters. If the given hierarchy is not</span></div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment">// properly mounted with appropriate subsystems, or the given cgroup is not</span></div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="comment">// valid, or the given control file is not valid, the function will return</span></div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="comment">// error.</span></div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="comment">/
/ @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment">// @param control Name of the control file.</span></div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment">// @return The value read from the control file.</span></div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <a class="code" href="classTry.html">Try<std::string></a> <a class="code" href="namespacecgroups.html#aa696e42fa4a13e922dee2d1f869146d2">read</a>(</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keyword">const</span> std::string& cgroup,</div><div class="line"><a name="l00249"></a><span class="li
neno"> 249</span>  <span class="keyword">const</span> std::string& control);</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment">// Write a control file. Parameter checking is similar to read.</span></div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="comment">// @param control Name of the control file.</span></div><div class="line"><a name="l00256"></a><span
class="lineno"> 256</span> <span class="comment">// @param value Value to be written.</span></div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="comment">// @return Some if the operation succeeds.</span></div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment">// Error if the operation fails.</span></div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacecgroups.html#ad199dcd922eab26b23b7011c7e0ca34a">write</a>(</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keyword">const</span> std::string& cgroup,</div><div class="line"><a name="l00262"></a><span
class="lineno"> 262</span>  <span class="keyword">const</span> std::string& control,</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keyword">const</span> std::string& value);</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment">// Check whether a control file is valid under a given cgroup and a given</span></div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="comment">// hierarchy. This function will return error if the given hierarchy is not</span></div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="comment">// properly mounted with appropriate subsystems, or the given cgroup does not</span></div><div class="lin
e"><a name="l00269"></a><span class="lineno"> 269</span> <span class="comment">// exist, or the control file does not exist.</span></div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="comment">// @param control Name of the control file.</span></div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="comment">// @return Some if the check succeeds.</span></div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="comment">// Error if the check fails.</span></div><div class="line"><a name="l00275"></a>
<span class="lineno"> 275</span> <a class="code" href="classTry.html">Try<bool></a> <a class="code" href="namespacecgroups.html#a8a1f39ed37d38f45bf997bbb2f6b791c">exists</a>(</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keyword">const</span> std::string& cgroup,</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keyword">const</span> std::string& control);</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span> </div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span> </div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment">// Return the set of process IDs in a given cgroup under a given hierarchy. It</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="comment">// will return error if the given hierarchy or the given cgroup is not valid.</span></div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="comment">// @return The set of process ids.</span></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <a class="code" href="classTry.html">Try<std::set<pid_t></a>> <a class="code" href="namespacecgroups.html#ad3e8800b1782f900cead465f7920dfa5">processes</a>(</div><div class="line"><a name="l00287"></a><span class="linen
o"> 287</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span> </div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span> </div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="comment">// Return the set of thread IDs in a given cgroup under a given hierarchy. It</span></div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="comment">// will return error if the given hierarchy or the given cgroup is not valid.</span></div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00294"></a><span
class="lineno"> 294</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="comment">// @return The set of thread ids.</span></div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <a class="code" href="classTry.html">Try<std::set<pid_t></a>> <a class="code" href="namespacecgroups.html#a9fb61299862484ab2d1bd382ea109ca9">threads</a>(</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span> </div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>
0;</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="comment">// Assign a given process specified by its pid to a given cgroup. All threads</span></div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="comment">// in the pid's threadgroup will also be moved to the cgroup. This function</span></div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="comment">// will return error if the given hierarchy or the given cgroup is not valid.</span></div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="comment">// Also, it will return error if the pid has no process associated with it.</span></div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00306"></a><span class="lineno"> 306
</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span> <span class="comment">// @param pid The pid of the given process.</span></div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="comment">// @return Some if the operation succeeds.</span></div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="comment">// Error if the operation fails.</span></div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacecgroups.html#a60fe712940bfb345dc346c1dbc622cf5">assign</a>(</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="lin
e"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keyword">const</span> std::string& cgroup,</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html#ab03ced250ed239bc3b50b669493997f9">pid_t</a> pid);</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span> </div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span> </div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment">// Isolate a given process specified by its 'pid' to a given cgroup</span></div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment">// by both creating the cgroup (recursively) if it doesn't exist and</span></div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment">// then assig
ning the process to that cgroup.</span></div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment">//</span></div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="comment">// @param pid The pid of the given process.</span></div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="comment">// @return Nothing if the operation succeeds.</span></div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <span class="comment">// Error if the operation fails.</span></div><div cl
ass="line"><a name="l00325"></a><span class="lineno"> 325</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespacecgroups.html#aceb245d6ea6362ac1c2b1247556179d6">isolate</a>(</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keyword">const</span> std::string& cgroup,</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html#ab03ced250ed239bc3b50b669493997f9">pid_t</a> pid);</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span> </div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span> </div><div class="line"><a name="l00331"></a><span class="lineno"><a class="line" href="namespacecg
roups_1_1event.html"> 331</a></span> <span class="keyword">namespace </span>event {</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span> </div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span> <span class="comment">// Listen on an event notifier and return a future which will become ready when</span></div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span> <span class="comment">// the certain event happens. This function will return a future failure if some</span></div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span> <span class="comment">// expected happens (e.g. the given hierarchy does not have the proper</span></div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span> <span class="comment">// subsystems attached).</span></div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span> <span class="comment">// @param h
ierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="comment">// @param control Name of the control file.</span></div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="comment">// @param args Control specific arguments.</span></div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span> <span class="comment">// @return A future which contains the value read from the file when ready.</span></div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span> <span class="comment">// Error if something unexpected happens.</span></div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <a
class="code" href="classprocess_1_1Future.html">process::Future<uint64_t></a> <a class="code" href="namespacecgroups_1_1event.html#a6f0a35d2d8f1381bc000001c94155393">listen</a>(</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keyword">const</span> std::string& cgroup,</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="keyword">const</span> std::string& control,</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keyword">const</span> <a class="code" href="classOption.html">Option<std::string></a>& args = <a class="code" href="classOption.html">Option<std::string>::none</a>());</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <
/div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span> } <span class="comment">// namespace event {</span></div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> </div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span> </div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="comment">// Destroy a cgroup under a given hierarchy. It will also recursively</span></div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="comment">// destroy any sub-cgroups. If the freezer subsystem is attached to</span></div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="comment">// the hierarchy, we attempt to kill all tasks in a given cgroup,</span></div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="comment">// before removing it. Otherwise, we just attempt
to remove the</span></div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="comment">// cgroup. This function will return an error if the given hierarchy</span></div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment">// or the given cgroup does not exist or if we failed to destroy any</span></div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment">// of the cgroups.</span></div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="comment">// NOTE: If cgroup is "/" (default), all cgroups under the</span></div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="comment">// hierarchy are destroyed.</span></div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="comment">// TODO(vinod): Add support for killing tasks when freez
er subsystem</span></div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="comment">// is not present.</span></div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span> <span class="comment">// @return A future which will become ready when the operation is done.</span></div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span> <span class="comment">// Error if something unexpected happens.</span></div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span> <a class="code" href="classprocess_1_1Future.html">process::Future
<Nothing></a> <a class="code" href="namespacecgroups.html#aff40863260825f6176d8195102a0a47f">destroy</a>(</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="keyword">const</span> std::string& cgroup = <span class="stringliteral">"/"</span>);</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span> </div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span> </div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="comment">// Destroy a cgroup under a given hierarchy. This is a convenience</span></div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="comment">// function which wraps the cgroups::destroy() to add a timeout: if</span></div><div
class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="comment">// the cgroup(s) cannot be destroyed after timeout the operation will</span></div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="comment">// be discarded.</span></div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span> <a class="code" href="classprocess_1_1Future.html">process::Future<Nothing></a> <a class="code" href="namespacecgroups.html#aff40863260825f6176d8195102a0a47f">destroy</a>(</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keyword">const</span> std::string& cgroup,</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keyword">const</span> <a class="code"
href="classDuration.html">Duration</a>& timeout);</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span> </div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span> </div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="comment">// Cleanup the hierarchy, by first destroying all the underlying</span></div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> <span class="comment">// cgroups, unmounting the hierarchy and deleting the mount point.</span></div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="comment">// @return A future which will become ready when the operation is done.</span></div><div class="line"><a name="l00386"></a><span class="lineno"> 386<
/span> <span class="comment">// Error if something unexpected happens.</span></div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span> <a class="code" href="classprocess_1_1Future.html">process::Future<bool></a> <a class="code" href="namespacecgroups.html#a12d210f286e5fcf7993c0c90b9459606">cleanup</a>(<span class="keyword">const</span> std::string& hierarchy);</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span> </div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span> </div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="comment">// Returns the stat information from the given file.</span></div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment">// @param hierarchy Path to the hierarchy root.</span></div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <spa
n class="comment">// @param cgroup Path to the cgroup relative to the hierarchy root.</span></div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="comment">// @param file The stat file to read from. (Ex: "memory.stat").</span></div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="comment">// @return The stat information parsed from the file.</span></div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="comment">// Error if reading or parsing fails.</span></div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="comment">// TODO(bmahler): Consider namespacing stat for each subsystem (e.g.</span></div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span> <span class="comment">// cgroups::memory::stat and cgroups::cpuacct::stat).</span></div><div class="line"><a nam
e="l00398"></a><span class="lineno"> 398</span> <a class="code" href="classTry.html">Try<hashmap<std::string, uint64_t></a>> <a class="code" href="namespacecgroups.html#a78e3c7ca2e422779908eec45f859d757">stat</a>(</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keyword">const</span> std::string& cgroup,</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keyword">const</span> std::string& <a class="code" href="namespacemesos_1_1uri.html#a0a3b30c1eb427c4053aaef120b1f453c">file</a>);</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span> </div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span> </div><div class="line"><a name="l00404"></a><span class="lineno">
404</span> <span class="comment">// Blkio subsystem.</span></div><div class="line"><a name="l00405"></a><span class="lineno"><a class="line" href="namespacecgroups_1_1blkio.html"> 405</a></span> <span class="keyword">namespace </span>blkio {</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span> </div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="comment">// Returns the cgroup that the specified pid is a member of within the</span></div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span> <span class="comment">// hierarchy that the 'blkio' subsystem is mounted, or None if the subsystem</span></div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span> <span class="comment">// is not mounted or the pid is not a member of a cgroup.</span></div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span> <a class="code" href="clas
sResult.html">Result<std::string></a> <a class="code" href="namespacecgroups_1_1named.html#a90339a144714dee1c97f9e34553ace0e">cgroup</a>(<a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html#ab03ced250ed239bc3b50b669493997f9">pid_t</a> pid);</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span> </div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span> </div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span> <span class="comment">// Wrapper class for dev_t.</span></div><div class="line"><a name="l00414"></a><span class="lineno"><a class="line" href="classcgroups_1_1blkio_1_1Device.html"> 414</a></span> <span class="keyword">class </span><a class="code" href="classcgroups_1_1blkio_1_1Device.html">Device</a></div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span> {</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span> <
span class="keyword">public</span>:</div><div class="line"><a name="l00417"></a><span class="lineno"><a class="line" href="classcgroups_1_1blkio_1_1Device.html#a0f1f2e35fe5525c879b74514ded15871"> 417</a></span>  constexpr <a class="code" href="classcgroups_1_1blkio_1_1Device.html#a0f1f2e35fe5525c879b74514ded15871">Device</a>(dev_t device) : value(device) {}</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> getMajor() <span class="keyword">const</span>;</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> getMinor() <span class="keyword">const</span>;</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span> </div><div class="line"><a name="l00421"></a><span class="lineno"><a class="line" href="classcgroups_1_1blkio_1_1Device.html#
a578d8a8719fa30c1284c30fb764727a8"> 421</a></span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classcgroups_1_1blkio_1_1Device.html#a578d8a8719fa30c1284c30fb764727a8">operator==</a>(<span class="keyword">const</span> <a class="code" href="classcgroups_1_1blkio_1_1Device.html">Device</a>& that)<span class="keyword"> const</span></div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">return</span> value == that.value;</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  }</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span> </div><div class="line"><a name="l00426"></a><span class="lineno"><a class="line" href="classcgroups_1_1blkio_1_1Device.html#a95281e7fd14131a91a6e4c20a4a361c5"> 426</a>
</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classcgroups_1_1blkio_1_1Device.html#a95281e7fd14131a91a6e4c20a4a361c5">operator!=</a>(<span class="keyword">const</span> <a class="code" href="classcgroups_1_1blkio_1_1Device.html">Device</a>& that)<span class="keyword"> const</span></div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keywordflow">return</span> value != that.value;</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  }</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span> </div><div class="line"><a name="l00431"></a><span class="lineno"><a class="line" href="classcgroups_1_1blkio_1_1Device.html#a7932aa078a2e641999014f433e5c6acc"> 431</a></span>  <span class="keyword">inline<
/span> <span class="keyword">operator</span> dev_t()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> value; }</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span> </div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keyword">static</span> <a class="code" href="classTry.html">Try<Device></a> <a class="code" href="namespaceappc_1_1spec.html#a2107ae129dd83fbd20b22195247f16b5">parse</a>(<span class="keyword">const</span> std::string& s);</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span> </div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  dev_t value;</div><div class="line
"><a name="l00438"></a><span class="lineno"> 438</span> };</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span> </div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span> </div><div class="line"><a name="l00441"></a><span class="lineno"><a class="line" href="namespacecgroups_1_1blkio.html#a350b1eb57318afaea7700ab7786b55ef"> 441</a></span> <span class="keyword">enum class</span> <a class="code" href="namespacecgroups_1_1blkio.html#a350b1eb57318afaea7700ab7786b55ef">Operation</a> {</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <a class="code" href="namespacecgroups_1_1blkio.html#a350b1eb57318afaea7700ab7786b55efa3af22b59f4641bc5501998297f9ac70d">TOTAL</a>,</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  READ,</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  WRITE,</div><div class="line"><a name="l00445"></a><
span class="lineno"> 445</span>  <a class="code" href="namespacecgroups_1_1blkio.html#a350b1eb57318afaea7700ab7786b55efa274ccef15a21e829d03293a6fd1974f3">SYNC</a>,</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <a class="code" href="namespacecgroups_1_1blkio.html#a350b1eb57318afaea7700ab7786b55efabe553330beb7b3d994656e0a4e66cd96">ASYNC</a>,</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span> };</div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span> </div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span> </div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span> <span class="comment">// Entry for a blkio file. The format of each entry can either be:</span></div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span> <span class="comment">// 1. <value></span></div><div class="line"><a name="l00452"></a>
<span class="lineno"> 452</span> <span class="comment">// 2. <dev> <value></span></div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span> <span class="comment">// 3. <dev> <op> <value></span></div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span> <span class="comment">// 4. <op> <value></span></div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span> <span class="comment">//</span></div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span> <span class="comment">// For details:</span></div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span> <span class="comment">// https://www.kernel.org/doc/Documentation/cgroup-v1/blkio-controller.txt</span></div><div class="line"><a name="l00458"></a><span class="lineno"><a class="line" href="structcgroups_1_1blkio_1_1Value.html"> 458</a></span> <span class="keyword">
struct </span><a class="code" href="structcgroups_1_1blkio_1_1Value.html">Value</a></div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span> {</div><div class="line"><a name="l00460"></a><span class="lineno"><a class="line" href="structcgroups_1_1blkio_1_1Value.html#a19fac9c72340cc635cb386052e82c157"> 460</a></span>  <a class="code" href="classOption.html">Option<Device></a> <a class="code" href="structcgroups_1_1blkio_1_1Value.html#a19fac9c72340cc635cb386052e82c157">device</a>;</div><div class="line"><a name="l00461"></a><span class="lineno"><a class="line" href="structcgroups_1_1blkio_1_1Value.html#a579f026b9f741a2c33ebfc0ee7ff48c8"> 461</a></span>  <a class="code" href="classOption.html">Option<Operation></a> <a class="code" href="structcgroups_1_1blkio_1_1Value.html#a579f026b9f741a2c33ebfc0ee7ff48c8">op</a>;</div><div class="line"><a name="l00462"></a><span class="lineno"><a class="line" href="structcgroups_1_1blkio_1_1Value.ht
ml#ae00adee746b63d26ff3f3be95dddbbb8"> 462</a></span>  uint64_t <a class="code" href="structcgroups_1_1blkio_1_1Value.html#ae00adee746b63d26ff3f3be95dddbbb8">value</a>;</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span> </div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keyword">static</span> <a class="code" href="classTry.html">Try<Value></a> <a class="code" href="namespaceappc_1_1spec.html#a2107ae129dd83fbd20b22195247f16b5">parse</a>(<span class="keyword">const</span> std::string& s);</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span> };</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span> </div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span> </div><div class="line"><a name="l00468"></a><span class="lineno"><a class="line" href="namespacecgroups_1_1blkio_1_1cfq.html"> 468</a></span> <span
class="keyword">namespace </span>cfq {</div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span> </div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span> <a class="code" href="classTry.html">Try<std::vector<Value></a>> <a class="code" href="namespacecgroups_1_1blkio_1_1cfq.html#abe4d7d69fdf7ca70fb30c6cd34a953e4">time</a>(</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span> </div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span> </div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span> <a class="code" href="classTry.html">Try<std::vector<V
alue></a>> <a class="code" href="namespacecgroups_1_1blkio_1_1cfq.html#a5a9522fa8b40ec2eda4194dddacc1994">time_recursive</a>(</div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span> </div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span> </div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span> <a class="code" href="classTry.html">Try<std::vector<Value></a>> <a class="code" href="namespacecgroups_1_1blkio_1_1cfq.html#ae20bcd7db659e6a7e6e6f78e8c0dfce5">sectors</a>(</div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="keyword">const</span> std::stri
ng& hierarchy,</div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span> </div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span> </div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span> <a class="code" href="classTry.html">Try<std::vector<Value></a>> <a class="code" href="namespacecgroups_1_1blkio_1_1cfq.html#a93d74b08c57a574b030b284a69665b09">sectors_recursive</a>(</div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span> </d
iv><div class="line"><a name="l00489"></a><span class="lineno"> 489</span> </div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span> <span class="comment">// Returns the total number of bios/requests merged into requests</span></div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span> <span class="comment">// belonging to the given cgroup from blkio.io_merged.</span></div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span> <a class="code" href="classTry.html">Try<std::vector<Value></a>> <a class="code" href="namespacecgroups_1_1blkio_1_1cfq.html#aadb0e71d712040f776c17f46ae932f1e">io_merged</a>(</div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  <span class="keyword">const</span> std::string& cgroup);</d
iv><div class="line"><a name="l00495"></a><span class="lineno"> 495</span> </div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span> </div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span> <span class="comment">// Returns the total number of bios/requests merged into requests</span></div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span> <span class="comment">// belonging to the given cgroup and all its descendants from</span></div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span> <span class="comment">// blkio.io_merged_recursive.</span></div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span> <a class="code" href="classTry.html">Try<std::vector<Value></a>> <a class="code" href="namespacecgroups_1_1blkio_1_1cfq.html#a2a52363ef2582fd4c35b89fd798af0b4">io_merged_recursive</a>(</div><div class="line"><a name="l00501"></a><span class="
lineno"> 501</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span> </div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span> </div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span> <span class="comment">// Returns the total number of requests queued up in the given</span></div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span> <span class="comment">// cgroup from blkio.io_queued.</span></div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span> <a class="code" href="classTry.html">Try<std::vector<Value></a>> <a class="code" href="namespacecgroups_1_1blkio_1_1cfq.html#a7b61635cf26f0d996aa248742a804a08">io_queued</a>(
</div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span> </div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span> </div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span> <span class="comment">// Returns the total number of requests queued up in the given</span></div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="comment">// cgroup and all its descendants from blkio.io_queued_recursive.</span></div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span> <a class="code" href="classTry.html">Try<std::vector<Value></a>> <a class="code" h
ref="namespacecgroups_1_1blkio_1_1cfq.html#acd59264959c762cda013b9d7117b1c6d">io_queued_recursive</a>(</div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span> </div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span> </div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="comment">// Returns the number of bytes transferred to/from the disk by</span></div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span> <span class="comment">// the given cgroup from blkio.io_service_bytes.</span></div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span> <a class=
"code" href="classTry.html">Try<std::vector<Value></a>> <a class="code" href="namespacecgroups_1_1blkio_1_1throttle.html#a3b600e20f0fcfbc89dfb9e30b2000d88">io_service_bytes</a>(</div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span> </div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span> </div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span> <span class="comment">// Returns the number of bytes transferred to/from the disk by</span></div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span> <span class="comment">// the given cgroup and all its descendants from</span></div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span> <span class="comment">// blkio.io_service_bytes_recursive.</span></div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span> <a class="code" href="classTry.html">Try<std::vector<Value></a>> <a class="code" href="namespacecgroups_1_1blkio_1_1cfq.html#a1ee0eb51db62f640e7a63833698170b2">io_service_bytes_recursive</a>(</div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span> </div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span> </div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span> <span class="comm
ent">// Returns the total amount of time between request dispatch and</span></div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span> <span class="comment">// completion by the IOs done by the given cgroup from</span></div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span> <span class="comment">// blkio.io_service_time.</span></div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span> <a class="code" href="classTry.html">Try<std::vector<Value></a>> <a class="code" href="namespacecgroups_1_1blkio_1_1cfq.html#ab2d80247957e550deaafc377f4574fe2">io_service_time</a>(</div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <span class="keyword">const</span> std::string& hierarchy,</div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <span class="keyword">const</span> std::string& cgroup);</div><div class="line"><a name="l00540"><
/a><span class="lineno"> 540</span> </div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span> </div><div class="line"><a name="l00542"></a><span c
<TRUNCATED>