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Posted to docs@httpd.apache.org by ji...@apache.org on 2001/09/04 20:16:26 UTC
cvs commit: httpd-docs-1.3/htdocs/manual/mod core.html.en
jim 01/09/04 11:16:26
Modified: htdocs/manual server-wide.html.en
htdocs/manual/misc perf-tuning.html
htdocs/manual/mod core.html.en
Log:
Document the AcceptMutex directive
Revision Changes Path
1.9 +5 -1 httpd-docs-1.3/htdocs/manual/server-wide.html.en
Index: server-wide.html.en
===================================================================
RCS file: /home/cvs/httpd-docs-1.3/htdocs/manual/server-wide.html.en,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -r1.8 -r1.9
--- server-wide.html.en 2001/07/13 07:37:13 1.8
+++ server-wide.html.en 2001/09/04 18:16:26 1.9
@@ -155,6 +155,7 @@
<a href="mod/core.html#listen">Listen</a><br>
<a href="mod/core.html#listenbacklog">ListenBackLog</a><br>
<a href="mod/core.html#acceptfilter">AcceptFilter</a><br>
+<a href="mod/core.html#acceptmutex">AcceptMutex</a><br>
<a href="mod/core.html#maxkeepaliverequests">MaxKeepAliveRequests</a><br>
<a href="mod/core.html#port">Port</a><br>
<a href="mod/core.html#sendbuffersize">SendBufferSize</a><br>
@@ -180,7 +181,10 @@
<code>TimeOut</code> directives are used to adjust how Apache
interacts with the network.<code>AcceptFilter</code> controls
a BSD specific filter optimization. See the BSD section on
-<a href="misc/perf-bsd44.html">performance hints</a> documentation.</p>
+<a href="misc/perf-bsd44.html">performance hints</a> documentation.
+<code>AcceptMutex</code> controls which accept mutex method will
+be used. For an explanation of what this is and why it's needed,
+see the <a href="misc/perf-tuning.html">performance tuning guide</a> </p>
<p>The <code>KeepAlive</code>, <code>KeepAliveTimeout</code>,
and <code>MaxKeepAliveRequests</code> directives are used to
1.25 +10 -7 httpd-docs-1.3/htdocs/manual/misc/perf-tuning.html
Index: perf-tuning.html
===================================================================
RCS file: /home/cvs/httpd-docs-1.3/htdocs/manual/misc/perf-tuning.html,v
retrieving revision 1.24
retrieving revision 1.25
diff -u -r1.24 -r1.25
--- perf-tuning.html 2000/11/14 22:17:15 1.24
+++ perf-tuning.html 2001/09/04 18:16:26 1.25
@@ -367,15 +367,15 @@
to use multiple <CODE>Listen</CODE> directives.
<DL>
-<DT><CODE>USE_FLOCK_SERIALIZED_ACCEPT</CODE>
+<DT><CODE>HAVE_FLOCK_SERIALIZED_ACCEPT</CODE>
<DD>This method uses the <CODE>flock(2)</CODE> system call to lock a
lock file (located by the <CODE>LockFile</CODE> directive).
-<DT><CODE>USE_FCNTL_SERIALIZED_ACCEPT</CODE>
+<DT><CODE>HAVE_FCNTL_SERIALIZED_ACCEPT</CODE>
<DD>This method uses the <CODE>fcntl(2)</CODE> system call to lock a
lock file (located by the <CODE>LockFile</CODE> directive).
-<DT><CODE>USE_SYSVSEM_SERIALIZED_ACCEPT</CODE>
+<DT><CODE>HAVE_SYSVSEM_SERIALIZED_ACCEPT</CODE>
<DD>(1.3 or later) This method uses SysV-style semaphores to implement the
mutex. Unfortunately SysV-style semaphores have some bad side-effects.
One is that it's possible Apache will die without cleaning up the semaphore
@@ -386,7 +386,7 @@
on any architecture except IRIX (where the previous two are prohibitively
expensive on most IRIX boxes).
-<DT><CODE>USE_USLOCK_SERIALIZED_ACCEPT</CODE>
+<DT><CODE>HAVE_USLOCK_SERIALIZED_ACCEPT</CODE>
<DD>(1.3 or later) This method is only available on IRIX, and uses
<CODE>usconfig(2)</CODE> to create a mutex. While this method avoids
the hassles of SysV-style semaphores, it is not the default for IRIX.
@@ -395,10 +395,10 @@
code. On multi-processor IRIX boxes the uslock code is an order of magnitude
faster than the SysV-semaphore code. Kind of a messed up situation.
So if you're using a multiprocessor IRIX box then you should rebuild your
-webserver with <CODE>-DUSE_USLOCK_SERIALIZED_ACCEPT</CODE> on the
+webserver with <CODE>-DHAVE_USLOCK_SERIALIZED_ACCEPT</CODE> on the
<CODE>EXTRA_CFLAGS</CODE>.
-<DT><CODE>USE_PTHREAD_SERIALIZED_ACCEPT</CODE>
+<DT><CODE>HAVE_PTHREAD_SERIALIZED_ACCEPT</CODE>
<DD>(1.3 or later) This method uses POSIX mutexes and should work on
any architecture implementing the full POSIX threads specification,
however appears to only work on Solaris (2.5 or later), and even then
@@ -409,7 +409,10 @@
<P>If your system has another method of serialization which isn't in the
above list then it may be worthwhile adding code for it (and submitting
-a patch back to Apache).
+a patch back to Apache). The above <code>HAVE_METHOD_SERIALIZED_ACCEPT</code>
+defines specify which method is available and works on the platform (you
+can have more than one); <code>USE_METHOD_SERIALIZED_ACCEPT</code> is
+used to specify the default method (see the <code>AcceptMutex</code> directive).
<P>Another solution that has been considered but never implemented is
to partially serialize the loop -- that is, let in a certain number
1.195 +37 -0 httpd-docs-1.3/htdocs/manual/mod/core.html.en
Index: core.html.en
===================================================================
RCS file: /home/cvs/httpd-docs-1.3/htdocs/manual/mod/core.html.en,v
retrieving revision 1.194
retrieving revision 1.195
diff -u -r1.194 -r1.195
--- core.html.en 2001/08/22 23:12:12 1.194
+++ core.html.en 2001/09/04 18:16:26 1.195
@@ -22,6 +22,7 @@
<H2>Directives</H2>
<UL>
<LI><A HREF="#acceptfilter">AcceptFilter</A>
+<LI><A HREF="#acceptmutex">AcceptMutex</A>
<LI><A HREF="#accessconfig">AccessConfig</A>
<LI><A HREF="#accessfilename">AccessFileName</A>
<LI><A HREF="#adddefaultcharset">AddDefaultCharset</A>
@@ -137,6 +138,42 @@
wether or not SO_ACCEPTFILTER was defined during the compile.
</p>
+
+<H2><A NAME="acceptmutex">AcceptMutex directive</A></H2>
+<!--%plaintext <?INDEX {\tt AcceptMutex} directive> -->
+<A
+ HREF="directive-dict.html#Syntax"
+ REL="Help"
+><STRONG>Syntax:</STRONG></A> AcceptMutex uslock|pthread|sysvsem|fcntl|flock|os2sem|tpfcore|none|default<BR>
+<A
+ HREF="directive-dict.html#Default"
+ REL="Help"
+><STRONG>Default:</STRONG></A> <CODE>AccceptMutex default</CODE><BR>
+<A
+ HREF="directive-dict.html#Context"
+ REL="Help"
+><STRONG>Context:</STRONG></A> server config<BR>
+<A
+ HREF="directive-dict.html#Status"
+ REL="Help"
+><STRONG>Status:</STRONG></A> core<P>
+
+<p>
+<code>AcceptMutex</code> controls which accept() mutex method
+Apache will use. Not all methods are available on all platforms,
+since the suite of methods is determined at compile-time. For
+a list of which methods are available for your particular build,
+the <code>httpd -L</code> command line option will list them out.
+</p>
+<p>
+The compile time flags <code>-D HAVE_METHOD_SERIALIZED_ACCEPT</code> can be
+used to add different methods to your build, or one can edit the
+<code>include/ap_config.h</code> file for your particular platform.
+</p>
+<p>
+See the <a href="misc/perf-tuning.html">performance tuning guide</a>
+for more information.
+</p>
<H2><A NAME="accessconfig">AccessConfig directive</A></H2>
<!--%plaintext <?INDEX {\tt AccessConfig} directive> -->
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