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>