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Posted to commits@subversion.apache.org by iv...@apache.org on 2014/12/25 13:20:10 UTC
svn commit: r1647890 - in /subversion/branches/1.8.x-r1611380: ./
subversion/ subversion/libsvn_subr/cache-membuffer.c
Author: ivan
Date: Thu Dec 25 12:20:09 2014
New Revision: 1647890
URL: http://svn.apache.org/r1647890
Log:
On 1.8.x-r1611380 branch: merge r1611380 and r1611381 from trunk.
Modified:
subversion/branches/1.8.x-r1611380/ (props changed)
subversion/branches/1.8.x-r1611380/subversion/ (props changed)
subversion/branches/1.8.x-r1611380/subversion/libsvn_subr/cache-membuffer.c
Propchange: subversion/branches/1.8.x-r1611380/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Thu Dec 25 12:20:09 2014
@@ -124,4 +124,4 @@
/subversion/branches/uris-as-urls:1060426-1064427
/subversion/branches/verify-at-commit:1462039-1462408
/subversion/branches/wc-collate-path:1407642
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Propchange: subversion/branches/1.8.x-r1611380/subversion/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Thu Dec 25 12:20:09 2014
@@ -125,4 +125,4 @@
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/subversion/branches/verify-at-commit/subversion:1462039-1462408
/subversion/branches/wc-collate-path/subversion:1407642
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13119,1513122,1513156,1513463,1513472,1513874,1513879-1513880,1513943,1514295,1514315,1514318,1514356,1514628,1514763,1514785,1514804,1515119,1515141,1515201,1515225,1515237,1515343,1515366,1515516,1515534,1515721,1515992,1515997,1516023-1516024,1516049,1516051-1516053,1516071,1516271,1516429,1516556,1516565,1516567,1516806,1518184,1518942,1519615,1519617,1519733,1519816,1519823,1519955,1520065,1520529,1520532,1520539,1520745,1522892,1523666,1524869,1525902,1526439,1526655,1527103,1527105,1530763,1530768,1530872,1530922,1530967,1531002,1531004,1531014,1531938,1532023,1532098,1532316,1534102,1534149,1534158,1534713,1534737,1534860,1535115,1535161,1535532,1535610,1535676,1536350,1536383,1536464,1536488,1536537,1536914,1536931,1537018,1537147,1537190,1537193,1537221,1537263,1537360,1537415,1537555,1537700,1538516-1538517,1538519,1538574,1538581,1538812,1538925,1538928,1538939,1540044,1540417,1540752,1541432,1541635,1541638,1541705,1541790,1542042,1542069,1542071,1542119,1542129,1542138
,1542146,1542151,1542610,1542765,1542767,1542774,1543145,1543187,1543413,1543594,1543961,1544295,1544316,1544597,1544600,1544688,1544690,1544878,1544895,1545111,1545122,1545302,1545835,1545845,1547252,1547454,1547774,1547866,1547873,1548097,1548105,1548170,1548486,1548673,1549858,1549874,1550691,1550772,1550803,1551524,1551579,1552957-1552958,1553101,1553105,1553113,1553376-1553377,1553501,1553556,1554978,1555403,1555499,1557320,1557522,1559009,1559197,1560690,1560701,1561426,1561703,1563110,1564292,1564576,1564966,1564969,1565085,1565531,1566503-1566504,1567064,1567109,1567134,1567204,1567228,1567286,1567392,1567492,1567494,1567740,1567752,1567985,1568070,1568180,1568349,1568361,1568872,1568953,1568955,1569069,1570642,1571214,1571747,1571787,1571795,1572102,1572200,1572340,1573088,1573106,1573209,1574868,1575270,1575284,1575525,1575915,1577151,1577200,1577294,1577739,1577755,1577812-1577813,1578273,1578311,1578326,1578670,1578820,1578853,1578875,1579274,1579429,1579588,1579684,1580
626,1580650,1580832,1580867,1580872,1581296,1581305,1581315,1581430,1581810,1583580,1583977,1584342,1584576,1584592,1584745,1585686,1586052,1586255,1586352,1586467,1587511,1587946,1587968,1588772,1588778,1589184,1589188,1589360,1589460,1589486,1590212,1591123,1592014,1592034,1593992,1594156,1594223,1594794,1594814,1594834,1595061,1595431,1596866,1600311,1600315,1600323,1600331,1600348,1600368,1600393,1600563,1600781,1600909,1601851,1606009,1611379,1612225,1612405,1615211,1615219,1615255-1615256,1615260,1615263,1615354,1616131,1617687,1619105,1619118,1619153,1619774,1619802,1620332,1621978,1621981,1625533,1625537,1628431,1628536,1628540,1633126,1636874,1637826,1640730,1641564,1643033,1643409,1643437,1643457,1643461,1643482,1643810
+/subversion/trunk/subversion:1467440,1467450,1467481,1467587,1467597,1467668,1467675,1467803,1467807,1467951,1468109,1468116,1468151,1468347,1468395,1468439,1468487,1468565-1468566,1468980,1469248,1469363,1469478,1469489,1469512-1469513,1469550,1469556,1469645,1469674,1469833,1469862,1469866,1469871,1469994,1470031,1470037,1470221,1470238,1470246,1470248,1470537,1470650,1470738,1470781,1470898,1470904,1470908,1470913,1470936,1470993-1470994,1471028-1471029,1471107,1471153,1471302,1471443,1471490,1471744,1475704,1475724,1475772,1475963,1476092,1476155,1476181,1476193,1476254,1476359,1476366,1476607,1477294,1477359,1477729-1477730,1477876,1477891,1478001,1478220-1478221,1478465,1478617,1478897,1478951,1478987,1478998,1479320-1479321,1479323,1479326,1479329,1479540,1479563,1479605,1479896,1480054,1480077,1480080,1480082,1480119,1480149,1480344,1480412,1480426,1480442,1480616,1480641-1480642,1480664,1480669,1480681,1480723,1480738,1480765,1481010,1481418,1481594,1481596,1481625,1481627-
1481628,1481631-1481632,1481772,1481782,1481800,1481813,1481847,1481944,1481981,1482282,1482327,1482338,1482350,1482354,1482436,1482479,1482524,1482528,1482536,1482554,1482558,1482592,1482724,1482759,1482779,1482829,1482969-1482970,1482973,1483015,1483077,1483101,1483116,1483125,1483391,1483397,1483555,1483557,1483575,1483580,1483781,1483927,1483939,1483947,1483964-1483965,1483968,1483972,1483975,1483977,1483984,1484006,1484016-1484017,1484023,1484755,1485018,1485127,1485350,1485413,1485427,1485447,1485449,1485497,1485501,1485650,1486072,1486457,1486572,1486809,1486915,1486931,1487083,1487094,1488183,1488267,1488294,1488425,1488639,1488693,1488878,1489114,1489116-1489117,1489203,1489339,1489935,1490045,1490326,1490679,1490684,1490721,1491432,1491499,1491707,1491739,1491755-1491756,1491762,1491770,1491816,1491868,1492005,1492020,1492145,1492148,1492152,1492164,1492264,1492295,1493102,1493424,1493475,1493703,1493720,1493951,1494089,1494171,1494223,1494287,1494298,1494318,1494342,14946
57,1494913,1494967,1495063,1495104,1495204,1495209,1495214,1495256,1495329,1495428,1495432,1495446,1495597,1495805,1495850,1495978,1496007,1496110-1496111,1496127,1496132,1496151,1496470,1496938,1496957,1497002,1497318-1497319,1497551,1497614,1497804,1497975,1497980,1498000,1498012,1498136,1498449,1498455-1498456,1498483-1498484,1498486,1498550,1498564,1498851,1498885,1498997,1499034,1499044,1499064,1499095-1499096,1499100,1499403,1499423,1499438,1499447,1499460,1499470,1499483,1499492,1499496,1499498,1499595,1499727,1500074,1500175,1500226,1500680,1500695,1500762,1500799,1500801-1500802,1500904,1500928,1501199,1501207,1501656,1501702,1502097,1502267,1502577,1502777,1502811,1502901,1502909,1502952,1503009-1503010,1503058,1503061,1503211,1503318,1503528,1503884,1504192,1504505,1506040-1506041,1506047,1506058,1506966,1507044,1507382,1507567,1507589,1507889,1507891,1508438,1509186,1509196,1511057,1511272,1511353,1511603,1512067,1512119,1512195,1512300-1512301,1512432,1512471-1512472,15
13119,1513122,1513156,1513463,1513472,1513874,1513879-1513880,1513943,1514295,1514315,1514318,1514356,1514628,1514763,1514785,1514804,1515119,1515141,1515201,1515225,1515237,1515343,1515366,1515516,1515534,1515721,1515992,1515997,1516023-1516024,1516049,1516051-1516053,1516071,1516271,1516429,1516556,1516565,1516567,1516806,1518184,1518942,1519615,1519617,1519733,1519816,1519823,1519955,1520065,1520529,1520532,1520539,1520745,1522892,1523666,1524869,1525902,1526439,1526655,1527103,1527105,1530763,1530768,1530872,1530922,1530967,1531002,1531004,1531014,1531938,1532023,1532098,1532316,1534102,1534149,1534158,1534713,1534737,1534860,1535115,1535161,1535532,1535610,1535676,1536350,1536383,1536464,1536488,1536537,1536914,1536931,1537018,1537147,1537190,1537193,1537221,1537263,1537360,1537415,1537555,1537700,1538516-1538517,1538519,1538574,1538581,1538812,1538925,1538928,1538939,1540044,1540417,1540752,1541432,1541635,1541638,1541705,1541790,1542042,1542069,1542071,1542119,1542129,1542138
,1542146,1542151,1542610,1542765,1542767,1542774,1543145,1543187,1543413,1543594,1543961,1544295,1544316,1544597,1544600,1544688,1544690,1544878,1544895,1545111,1545122,1545302,1545835,1545845,1547252,1547454,1547774,1547866,1547873,1548097,1548105,1548170,1548486,1548673,1549858,1549874,1550691,1550772,1550803,1551524,1551579,1552957-1552958,1553101,1553105,1553113,1553376-1553377,1553501,1553556,1554978,1555403,1555499,1557320,1557522,1559009,1559197,1560690,1560701,1561426,1561703,1563110,1564292,1564576,1564966,1564969,1565085,1565531,1566503-1566504,1567064,1567109,1567134,1567204,1567228,1567286,1567392,1567492,1567494,1567740,1567752,1567985,1568070,1568180,1568349,1568361,1568872,1568953,1568955,1569069,1570642,1571214,1571747,1571787,1571795,1572102,1572200,1572340,1573088,1573106,1573209,1574868,1575270,1575284,1575525,1575915,1577151,1577200,1577294,1577739,1577755,1577812-1577813,1578273,1578311,1578326,1578670,1578820,1578853,1578875,1579274,1579429,1579588,1579684,1580
626,1580650,1580832,1580867,1580872,1581296,1581305,1581315,1581430,1581810,1583580,1583977,1584342,1584576,1584592,1584745,1585686,1586052,1586255,1586352,1586467,1587511,1587946,1587968,1588772,1588778,1589184,1589188,1589360,1589460,1589486,1590212,1591123,1592014,1592034,1593992,1594156,1594223,1594794,1594814,1594834,1595061,1595431,1596866,1600311,1600315,1600323,1600331,1600348,1600368,1600393,1600563,1600781,1600909,1601851,1606009,1611379-1611381,1612225,1612405,1615211,1615219,1615255-1615256,1615260,1615263,1615354,1616131,1617687,1619105,1619118,1619153,1619774,1619802,1620332,1621978,1621981,1625533,1625537,1628431,1628536,1628540,1633126,1636874,1637826,1640730,1641564,1643033,1643409,1643437,1643457,1643461,1643482,1643810
Modified: subversion/branches/1.8.x-r1611380/subversion/libsvn_subr/cache-membuffer.c
URL: http://svn.apache.org/viewvc/subversion/branches/1.8.x-r1611380/subversion/libsvn_subr/cache-membuffer.c?rev=1647890&r1=1647889&r2=1647890&view=diff
==============================================================================
--- subversion/branches/1.8.x-r1611380/subversion/libsvn_subr/cache-membuffer.c (original)
+++ subversion/branches/1.8.x-r1611380/subversion/libsvn_subr/cache-membuffer.c Thu Dec 25 12:20:09 2014
@@ -101,6 +101,21 @@
* on their hash key.
*/
+/* APR's read-write lock implementation on Windows is horribly inefficient.
+ * Even with very low contention a runtime overhead of 35% percent has been
+ * measured for 'svn-bench null-export' over ra_serf.
+ *
+ * Use a simple mutex on Windows. Because there is one mutex per segment,
+ * large machines should (and usually can) be configured with large caches
+ * such that read contention is kept low. This is basically the situation
+ * we head before 1.8.
+ */
+#ifdef WIN32
+# define USE_SIMPLE_MUTEX 1
+#else
+# define USE_SIMPLE_MUTEX 0
+#endif
+
/* A 16-way associative cache seems to be a good compromise between
* performance (worst-case lookups) and efficiency-loss due to collisions.
*
@@ -465,11 +480,15 @@ struct svn_membuffer_t
* the cache's creator doesn't feel the cache needs to be
* thread-safe.
*/
+# if USE_SIMPLE_MUTEX
+ svn_mutex__t *lock;
+# else
apr_thread_rwlock_t *lock;
+# endif
/* If set, write access will wait until they get exclusive access.
* Otherwise, they will become no-ops if the segment is currently
- * read-locked.
+ * read-locked. Only used when LOCK is an r/w lock.
*/
svn_boolean_t allow_blocking_writes;
#endif
@@ -489,12 +508,16 @@ static svn_error_t *
read_lock_cache(svn_membuffer_t *cache)
{
#if APR_HAS_THREADS
+# if USE_SIMPLE_MUTEX
+ return svn_mutex__lock(cache->lock);
+# else
if (cache->lock)
{
apr_status_t status = apr_thread_rwlock_rdlock(cache->lock);
if (status)
return svn_error_wrap_apr(status, _("Can't lock cache mutex"));
}
+# endif
#endif
return SVN_NO_ERROR;
}
@@ -505,6 +528,12 @@ static svn_error_t *
write_lock_cache(svn_membuffer_t *cache, svn_boolean_t *success)
{
#if APR_HAS_THREADS
+# if USE_SIMPLE_MUTEX
+
+ return svn_mutex__lock(cache->lock);
+
+# else
+
if (cache->lock)
{
apr_status_t status;
@@ -526,6 +555,8 @@ write_lock_cache(svn_membuffer_t *cache,
return svn_error_wrap_apr(status,
_("Can't write-lock cache mutex"));
}
+
+# endif
#endif
return SVN_NO_ERROR;
}
@@ -537,10 +568,18 @@ static svn_error_t *
force_write_lock_cache(svn_membuffer_t *cache)
{
#if APR_HAS_THREADS
+# if USE_SIMPLE_MUTEX
+
+ return svn_mutex__lock(cache->lock);
+
+# else
+
apr_status_t status = apr_thread_rwlock_wrlock(cache->lock);
if (status)
return svn_error_wrap_apr(status,
_("Can't write-lock cache mutex"));
+
+# endif
#endif
return SVN_NO_ERROR;
}
@@ -552,6 +591,12 @@ static svn_error_t *
unlock_cache(svn_membuffer_t *cache, svn_error_t *err)
{
#if APR_HAS_THREADS
+# if USE_SIMPLE_MUTEX
+
+ return svn_mutex__unlock(cache->lock, SVN_NO_ERROR);
+
+# else
+
if (cache->lock)
{
apr_status_t status = apr_thread_rwlock_unlock(cache->lock);
@@ -561,6 +606,8 @@ unlock_cache(svn_membuffer_t *cache, svn
if (status)
return svn_error_wrap_apr(status, _("Can't unlock cache mutex"));
}
+
+# endif
#endif
return err;
}
@@ -1290,6 +1337,12 @@ svn_cache__membuffer_cache_create(svn_me
* the cache's creator doesn't feel the cache needs to be
* thread-safe.
*/
+# if USE_SIMPLE_MUTEX
+
+ SVN_ERR(svn_mutex__init(&c[seg].lock, thread_safe, FALSE, pool));
+
+# else
+
c[seg].lock = NULL;
if (thread_safe)
{
@@ -1299,6 +1352,8 @@ svn_cache__membuffer_cache_create(svn_me
return svn_error_wrap_apr(status, _("Can't create cache mutex"));
}
+# endif
+
/* Select the behavior of write operations.
*/
c[seg].allow_blocking_writes = allow_blocking_writes;