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2025-07-03 - 09:03
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot8.osadl.org (updated Thu Jul 03, 2025 00:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1686750993729,6cyclictest2148816-21idleruntime-cro00:25:000
20326022350,1chrt2032603-21ssh23:10:572
1686750992923,5cyclictest1913021-21sh22:00:000
1686758992724,2cyclictest1745021-21/usr/sbin/munin20:00:002
1686758992622,3cyclictest1864534-21cron21:30:012
1686754992622,3cyclictest1888950-21systemd-run21:45:001
1686758992522,2cyclictest1800977-21latency_hist20:45:002
1686750992520,4cyclictest2075539-21sendmail23:40:010
1686760992421,1cyclictest0-21swapper/323:20:003
1686760992421,1cyclictest0-21swapper/319:40:013
1686758992420,2cyclictest2059181-21systemd-run23:30:002
1686754992421,2cyclictest0-21swapper/122:05:001
1686754992419,3cyclictest0-21swapper/122:15:001
1686750992419,4cyclictest0-21swapper/023:05:000
1686750992418,5cyclictest0-21swapper/022:55:000
1686758992320,2cyclictest1832086-21diskmemload00:30:002
1686750992317,5cyclictest1929237-21turbostat.cron22:09:590
1686750992317,5cyclictest0-21swapper/020:10:000
1686750992317,4cyclictest0-21swapper/021:20:010
1686758992219,2cyclictest2145932-21latency00:20:202
1686754992219,2cyclictest1713643-21latency_hist19:30:011
1686754992219,2cyclictest0-21swapper/100:39:591
1686750992215,5cyclictest0-21swapper/000:29:590
1686758992118,2cyclictest1945353-21idleruntime-cro22:19:592
1686750992115,5cyclictest1993957-21latency_hist22:50:000
1686750992115,5cyclictest1832086-21diskmemload23:50:190
1686750992114,6cyclictest2047377-21kthreadcore23:20:190
1686750992112,4cyclictest1969678-21cron22:35:000
1686760992017,1cyclictest0-21swapper/321:40:003
1686758992017,2cyclictest2084252-21gltestperf23:45:192
1686758992017,2cyclictest1977807-21sh22:40:002
1686758992017,2cyclictest0-21swapper/221:25:002
1686754992017,2cyclictest0-21swapper/123:40:011
1686754992017,2cyclictest0-21swapper/122:55:011
1686750992015,4cyclictest2124274-21apt-key00:10:000
1686750992015,4cyclictest0-21swapper/023:50:000
1686750992014,5cyclictest2051717-21gltestperf23:25:160
1686750992014,5cyclictest1704364-21kthreadcore19:20:180
1686750992014,5cyclictest0-21swapper/020:20:000
1686750992012,3cyclictest514-21systemd-logind23:45:000
1686750992011,8cyclictest0-21swapper/021:35:000
1686750992011,4cyclictest1888913-21cron21:45:000
1686760991916,1cyclictest0-21swapper/320:29:593
1686758991917,1cyclictest1807210-21apt-key20:50:012
1686758991916,2cyclictest1986043-21latency_hist22:45:012
1686758991916,2cyclictest1826135-21kworker/u8:0-rpciod22:00:012
1686758991916,2cyclictest0-21swapper/200:19:592
1686754991916,2cyclictest514-21systemd-logind21:25:001
1686754991916,2cyclictest1966927-21needreboot22:30:201
1686754991916,2cyclictest1897475-21cpuspeed_turbos21:50:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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