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Mel Gorman b898cc7001 vmscan: tracing: add a postprocessing script for reclaim-related ftrace events 
Add a simple post-processing script for the reclaim-related trace events.
It can be used to give an indication of how much traffic there is on the
LRU lists and how severe latencies due to reclaim are.  Example output
looks like the following

Reclaim latencies expressed as order-latency_in_ms
uname-3942             9-200.179000000004 9-98.7900000000373 9-99.8330000001006
kswapd0-311            0-662.097999999998 0-2.79700000002049 \
	0-149.100000000035 0-3295.73600000003 0-9806.31799999997 0-35528.833 \
	0-10043.197 0-129740.979 0-3.50500000000466 0-3.54899999999907 \
	0-9297.78999999992 0-3.48499999998603 0-3596.97999999998 0-3.92799999995623 \
	0-3.35000000009313 0-16729.017 0-3.57799999997951 0-47435.0630000001 \
	0-3.7819999998901 0-5864.06999999995 0-18635.334 0-10541.289 9-186011.565 \
	9-3680.86300000001 9-1379.06499999994 9-958571.115 9-66215.474 \
	9-6721.14699999988 9-1962.15299999993 9-1094806.125 9-2267.83199999994 \
	9-47120.9029999999 9-427653.886 9-2.6359999999404 9-632.148999999976 \
	9-476.753000000026 9-495.577000000048 9-8.45900000003166 9-6.6820000000298 \
	9-1.30500000016764 9-251.746000000043 9-383.905000000028 9-80.1419999999925 \
	9-281.160000000149 9-14.8780000000261 9-381.45299999998 9-512.07799999998 \
	9-49.5519999999087 9-167.439000000013 9-183.820999999996 9-239.527999999933 \
	9-19.9479999998584 9-148.747999999905 9-164.583000000101 9-16.9480000000913 \
	9-192.376000000164 9-64.1010000000242 9-1.40800000005402 9-3.60800000000745 \
	9-17.1359999999404 9-4.69500000006519 9-2.06400000001304 9-1582488.554 \
	9-6244.19499999983 9-348153.812 9-2.0999999998603 9-0.987999999895692 \
	0-32218.473 0-1.6140000000596 0-1.28100000019185 0-1.41300000017509 \
	0-1.32299999985844 0-602.584000000032 0-1.34400000004098 0-1.6929999999702 \
	1-22101.8190000001 9-174876.724 9-16.2420000000857 9-175.165999999736 \
	9-15.8589999997057 9-0.604999999981374 9-3061.09000000032 9-479.277000000235 \
	9-1.54499999992549 9-771.985000000335 9-4.88700000010431 9-15.0649999999441 \
	9-0.879999999888241 9-252.01500000013 9-1381.03600000031 9-545.689999999944 \
	9-3438.0129999998 9-3343.70099999988
bench-stresshig-3942   9-7063.33900000004 9-129960.482 9-2062.27500000002 \
	9-3845.59399999992 9-171.82799999998 9-16493.821 9-7615.23900000006 \
	9-10217.848 9-983.138000000035 9-2698.39999999991 9-4016.1540000001 \
	9-5522.37700000009 9-21630.429 \
	9-15061.048 9-10327.953 9-542.69700000016 9-317.652000000002 \
	9-8554.71699999995 9-1786.61599999992 9-1899.31499999994 9-2093.41899999999 \
	9-4992.62400000007 9-942.648999999976 9-1923.98300000001 9-3.7980000001844 \
	9-5.99899999983609 9-0.912000000011176 9-1603.67700000014 9-1.98300000000745 \
	9-3.96500000008382 9-0.902999999932945 9-2802.72199999983 9-1078.24799999991 \
	9-2155.82900000014 9-10.058999999892 9-1984.723 9-1687.97999999998 \
	9-1136.05300000007 9-3183.61699999985 9-458.731000000145 9-6.48600000003353 \
	9-1013.25200000009 9-8415.22799999989 9-10065.584 9-2076.79600000009 \
	9-3792.65699999989 9-71.2010000001173 9-2560.96999999997 9-2260.68400000012 \
	9-2862.65799999982 9-1255.81500000018 9-15.7440000001807 9-4.33499999996275 \
	9-1446.63800000004 9-238.635000000009 9-60.1790000000037 9-4.38800000003539 \
	9-639.567000000039 9-306.698000000091 9-31.4070000001229 9-74.997999999905 \
	9-632.725999999791 9-1625.93200000003 9-931.266000000061 9-98.7749999999069 \
	9-984.606999999844 9-225.638999999966 9-421.316000000108 9-653.744999999879 \
	9-572.804000000004 9-769.158999999985 9-603.918000000063 9-4.28499999991618 \
	9-626.21399999992 9-1721.25 9-0.854999999981374 9-572.39599999995 \
	9-681.881999999983 9-1345.12599999993 9-363.666999999899 9-3823.31099999999 \
	9-2991.28200000012 9-4.27099999994971 9-309.76500000013 9-3068.35700000008 \
	9-788.25 9-3515.73999999999 9-2065.96100000013 9-286.719999999972 \
	9-316.076000000117 9-344.151000000071 9-2.51000000000931 9-306.688000000082 \
	9-1515.00099999993 9-336.528999999864 9-793.491999999853 9-457.348999999929 \
	9-13620.155 9-119.933999999892 9-35.0670000000391 9-918.266999999993 \
	9-828.569000000134 9-4863.81099999999 9-105.222000000067 9-894.23900000006 \
	9-110.964999999851 9-0.662999999942258 9-12753.3150000002 9-12.6129999998957 \
	9-13368.0899999999 9-12.4199999999255 9-1.00300000002608 9-1.41100000008009 \
	9-10300.5290000001 9-16.502000000095 9-30.7949999999255 9-6283.0140000002 \
	9-4320.53799999994 9-6826.27300000004 9-3.07299999985844 9-1497.26799999992 \
	9-13.4040000000969 9-3.12999999988824 9-3.86100000003353 9-11.3539999998175 \
	9-0.10799999977462 9-21.780999999959 9-209.695999999996 9-299.647000000114 \
	9-6.01699999999255 9-20.8349999999627 9-22.5470000000205 9-5470.16800000006 \
	9-7.60499999998137 9-0.821000000229105 9-1.56600000010803 9-14.1669999998994 \
	9-0.209000000031665 9-1.82300000009127 9-1.70000000018626 9-19.9429999999702 \
	9-124.266999999993 9-0.0389999998733401 9-6.71400000015274 9-16.7710000001825 \
	9-31.0409999999683 9-0.516999999992549 9-115.888000000035 9-5.19900000002235 \
	9-222.389999999898 9-11.2739999999758 9-80.9050000000279 9-8.14500000001863 \
	9-4.44599999999627 9-0.218999999808148 9-0.715000000083819 9-0.233000000007451
\
	9-48.2630000000354 9-248.560999999987 9-374.96800000011 9-644.179000000004 \
	9-0.835999999893829 9-79.0060000000522 9-128.447999999858 9-0.692000000039116 \
	9-5.26500000013039 9-128.449000000022 9-2.04799999995157 9-12.0990000001621 \
	9-8.39899999997579 9-10.3860000001732 9-11.9310000000987 9-53.4450000000652 \
	9-0.46999999997206 9-2.96299999998882 9-17.9699999999721 9-0.776000000070781 \
	9-25.2919999998994 9-33.1110000000335 9-0.434000000124797 9-0.641000000061467 \
	9-0.505000000121072 9-1.12800000002608 9-149.222000000067 9-1.17599999997765 \
	9-3247.33100000001 9-10.7439999999478 9-153.523000000045 9-1.38300000014715 \
	9-794.762000000104 9-3.36199999996461 9-128.765999999829 9-181.543999999994 \
	9-78149.8229999999 9-176.496999999974 9-89.9940000001807 9-9.12700000009499 \
	9-250.827000000048 9-0.224999999860302 9-0.388999999966472 9-1.16700000036508 \
	9-32.1740000001155 9-12.6800000001676 9-0.0720000001601875 9-0.274999999906868
\
	9-0.724000000394881 9-266.866000000387 9-45.5709999999963 9-4.54399999976158 \
	9-8.27199999988079 9-4.38099999958649 9-0.512000000104308 9-0.0640000002458692
\
	9-5.20000000018626 9-0.0839999997988343 9-12.816000000108 9-0.503000000026077 \
	9-0.507999999914318 9-6.23999999975786 9-3.35100000025705 9-18.8530000001192 \
	9-25.2220000000671 9-68.2309999996796 9-98.9939999999478 9-0.441000000108033 \
	9-4.24599999981001 9-261.702000000048 9-3.01599999982864 9-0.0749999997206032 \
	9-0.0370000000111759 9-4.375 9-3.21800000034273 9-11.3960000001825 \
	9-0.0540000000037253 9-0.286000000312924 9-0.865999999921769 \
	9-0.294999999925494 9-6.45999999996275 9-4.31099999975413 9-128.248999999836 \
	9-0.282999999821186 9-102.155000000261 9-0.0860000001266599 \
	9-0.0540000000037253 9-0.935000000055879 9-0.0670000002719462 \
	9-5.8640000000596 9-19.9860000000335 9-4.18699999991804 9-0.566000000108033 \
	9-2.55099999997765 9-0.702000000048429 9-131.653999999631 9-0.638999999966472 \
	9-14.3229999998584 9-183.398000000045 9-178.095999999903 9-3.22899999981746 \
	9-7.31399999978021 9-22.2400000002235 9-11.7979999999516 9-108.10599999968 \
	9-99.0159999998286 9-102.640999999829 9-38.414000000339
Process                  Direct     Wokeup      Pages      Pages    Pages
details                   Rclms     Kswapd    Scanned    Sync-IO ASync-IO
cc1-30800                     0          1          0          0        0      wakeup-0=1
cc1-24260                     0          1          0          0        0      wakeup-0=1
cc1-24152                     0         12          0          0        0      wakeup-0=12
cc1-8139                      0          1          0          0        0      wakeup-0=1
cc1-4390                      0          1          0          0        0      wakeup-0=1
cc1-4648                      0          7          0          0        0      wakeup-0=7
cc1-4552                      0          3          0          0        0      wakeup-0=3
dd-4550                       0         31          0          0        0      wakeup-0=31
date-4898                     0          1          0          0        0      wakeup-0=1
cc1-6549                      0          7          0          0        0      wakeup-0=7
as-22202                      0         17          0          0        0      wakeup-0=17
cc1-6495                      0          9          0          0        0      wakeup-0=9
cc1-8299                      0          1          0          0        0      wakeup-0=1
cc1-6009                      0          1          0          0        0      wakeup-0=1
cc1-2574                      0          2          0          0        0      wakeup-0=2
cc1-30568                     0          1          0          0        0      wakeup-0=1
cc1-2679                      0          6          0          0        0      wakeup-0=6
sh-13747                      0         12          0          0        0      wakeup-0=12
cc1-22193                     0         18          0          0        0      wakeup-0=18
cc1-30725                     0          2          0          0        0      wakeup-0=2
as-4392                       0          2          0          0        0      wakeup-0=2
cc1-28180                     0         14          0          0        0      wakeup-0=14
cc1-13697                     0          2          0          0        0      wakeup-0=2
cc1-22207                     0          8          0          0        0      wakeup-0=8
cc1-15270                     0        179          0          0        0      wakeup-0=179
cc1-22011                     0         82          0          0        0      wakeup-0=82
cp-14682                      0          1          0          0        0      wakeup-0=1
as-11926                      0          2          0          0        0      wakeup-0=2
cc1-6016                      0          5          0          0        0      wakeup-0=5
make-18554                    0         13          0          0        0      wakeup-0=13
cc1-8292                      0         12          0          0        0      wakeup-0=12
make-24381                    0          1          0          0        0      wakeup-1=1
date-18681                    0         33          0          0        0      wakeup-0=33
cc1-32276                     0          1          0          0        0      wakeup-0=1
timestamp-outpu-2809          0        253          0          0        0      wakeup-0=240 wakeup-1=13
date-18624                    0          7          0          0        0      wakeup-0=7
cc1-30960                     0          9          0          0        0      wakeup-0=9
cc1-4014                      0          1          0          0        0      wakeup-0=1
cc1-30706                     0         22          0          0        0      wakeup-0=22
uname-3942                    4          1        306          0       17      direct-9=4       wakeup-9=1
cc1-28207                     0          1          0          0        0      wakeup-0=1
cc1-30563                     0          9          0          0        0      wakeup-0=9
cc1-22214                     0         10          0          0        0      wakeup-0=10
cc1-28221                     0         11          0          0        0      wakeup-0=11
cc1-28123                     0          6          0          0        0      wakeup-0=6
kswapd0-311                   0          7     357302          0    34233      wakeup-0=7
cc1-5988                      0          7          0          0        0      wakeup-0=7
as-30734                      0        161          0          0        0      wakeup-0=161
cc1-22004                     0         45          0          0        0      wakeup-0=45
date-4590                     0          4          0          0        0      wakeup-0=4
cc1-15279                     0        213          0          0        0      wakeup-0=213
date-30735                    0          1          0          0        0      wakeup-0=1
cc1-30583                     0          4          0          0        0      wakeup-0=4
cc1-32324                     0          2          0          0        0      wakeup-0=2
cc1-23933                     0          3          0          0        0      wakeup-0=3
cc1-22001                     0         36          0          0        0      wakeup-0=36
bench-stresshig-3942        287        287      80186       6295    12196      direct-9=287       wakeup-9=287
cc1-28170                     0          7          0          0        0      wakeup-0=7
date-7932                     0         92          0          0        0      wakeup-0=92
cc1-22222                     0          6          0          0        0      wakeup-0=6
cc1-32334                     0         16          0          0        0      wakeup-0=16
cc1-2690                      0          6          0          0        0      wakeup-0=6
cc1-30733                     0          9          0          0        0      wakeup-0=9
cc1-32298                     0          2          0          0        0      wakeup-0=2
cc1-13743                     0         18          0          0        0      wakeup-0=18
cc1-22186                     0          4          0          0        0      wakeup-0=4
cc1-28214                     0         11          0          0        0      wakeup-0=11
cc1-13735                     0          1          0          0        0      wakeup-0=1
updatedb-8173                 0         18          0          0        0      wakeup-0=18
cc1-13750                     0          3          0          0        0      wakeup-0=3
cat-2808                      0          2          0          0        0      wakeup-0=2
cc1-15277                     0        169          0          0        0      wakeup-0=169
date-18317                    0          1          0          0        0      wakeup-0=1
cc1-15274                     0        197          0          0        0      wakeup-0=197
cc1-30732                     0          1          0          0        0      wakeup-0=1

Kswapd                   Kswapd      Order      Pages      Pages    Pages
Instance                Wakeups  Re-wakeup    Scanned    Sync-IO ASync-IO
kswapd0-311                  91         24     357302          0    34233      wake-0=31 wake-1=1 wake-9=59       rewake-0=10 rewake-1=1 rewake-9=13

Summary
Direct reclaims:     		291
Direct reclaim pages scanned:	437794
Direct reclaim write sync I/O:	6295
Direct reclaim write async I/O:	46446
Wake kswapd requests:		2152
Time stalled direct reclaim: 	519.163009000002 ms

Kswapd wakeups:			91
Kswapd pages scanned:		357302
Kswapd reclaim write sync I/O:	0
Kswapd reclaim write async I/O:	34233
Time kswapd awake:		5282.749757 ms

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Larry Woodman <lwoodman@redhat.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Michael Rubin <mrubin@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-09 20:45:00 -07:00
..
postprocess vmscan: tracing: add a postprocessing script for reclaim-related ftrace events 2010-08-09 20:45:00 -07:00
events-kmem.txt mm tracing: cleanup Documentation/trace/events-kmem.txt 2009-12-22 14:17:55 -08:00
events.txt Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-05-20 09:20:59 -07:00
ftrace-design.txt tracing/documentation: Document dynamic ftracer internals 2010-07-21 11:00:25 -04:00
ftrace.txt tracing: Add documentation for trace commands mod, traceon/traceoff 2010-04-27 16:51:49 -04:00
function-graph-fold.vim tracing: Add vim script to enable folding for function_graph traces 2009-08-26 00:32:04 -04:00
kprobetrace.txt tracing/kprobes: Support "string" type 2010-07-05 15:54:45 -03:00
mmiotrace.txt Documentation: Update mmiotrace.txt 2009-12-20 06:18:23 +01:00
ring-buffer-design.txt Documentation: update ring-buffer-design.txt 2010-01-11 09:34:07 -08:00
tracepoint-analysis.txt Documentation: Update tracepoint-analysis.txt 2009-12-20 06:18:25 +01:00
tracepoints.txt tracing: consolidate documents 2009-04-09 07:28:10 +02:00