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2026-06-12 - 05:43
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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 rackbslot7.osadl.org (updated Fri Jun 12, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3837991203,42cyclictest9531-21apt-get19:14:270
3837991203,42cyclictest9531-21apt-get19:14:270
3837991113,33cyclictest17854-21fschecks_time21:10:490
3837991113,26cyclictest3102-21ls23:29:180
38379911125,17cyclictest0-21swapper/023:14:180
3837991105,42cyclictest9739-21/usr/sbin/munin22:46:240
3837991103,37cyclictest3542-21unixbench_multi21:39:520
3837991102,29cyclictest23342-21grep19:54:520
3837991102,29cyclictest23342-21grep19:54:520
3837991093,31cyclictest4352-21unixbench_multi23:29:540
38379910830,11cyclictest0-21swapper/019:34:180
3837991082,29cyclictest31275-21mailstats00:15:520
3837991082,29cyclictest31275-21mailstats00:15:520
38379910744,55cyclictest7382-21cron19:09:360
38379910744,55cyclictest7382-21cron19:09:360
3837991073,31cyclictest24099-21sh21:19:530
3837991073,31cyclictest24099-21sh21:19:530
38379910634,8cyclictest0-21swapper/021:04:470
3837991062,36cyclictest5349-21apt19:04:150
38379910620,23cyclictest26000-21/usr/sbin/munin21:24:380
38429910529,38cyclictest0-21swapper/120:54:161
38379910536,8cyclictest0-21swapper/019:05:020
38379910433,12cyclictest0-21swapper/023:54:490
38379910433,12cyclictest0-21swapper/023:54:490
3837991043,24cyclictest6722-21/usr/sbin/munin22:39:530
38379910351,46cyclictest7649-21ssh21:47:500
3837991033,45cyclictest19178-21/usr/sbin/munin19:44:430
38379910333,15cyclictest2706-21latency_hist22:34:190
38379910333,15cyclictest2706-21latency_hist22:34:190
38379910327,11cyclictest0-21swapper/023:04:500
38379910326,11cyclictest0-21swapper/023:19:320
38379910324,23cyclictest20548-21cpu22:09:310
3837991032,38cyclictest20608-21latency_hist23:04:190
3837991032,35cyclictest5981-21latency_hist20:44:180
3837991032,34cyclictest11397-21fschecks_time19:19:370
38379910316,30cyclictest31960-21/usr/sbin/munin21:34:410
3837991023,38cyclictest29055-21modprobe22:24:150
3837991023,32cyclictest8007-21fschecks_time20:49:370
3837991023,32cyclictest6503-21fschecks_count23:34:370
3837991023,32cyclictest18039-21ssh23:54:190
38379910226,10cyclictest0-21swapper/019:34:510
38379910218,29cyclictest17666-21latency_hist22:59:190
38479910114,48cyclictest386-21ssh23:24:352
3837991014,33cyclictest32687-21ps20:24:480
3837991014,33cyclictest32687-21ps20:24:480
38379910136,8cyclictest0-21swapper/021:59:400
3837991013,41cyclictest10046-21switchtime23:39:500
3837991013,41cyclictest10046-21switchtime23:39:500
38379910133,60cyclictest0-21swapper/021:49:340
3837991013,35cyclictest29732-21grep21:29:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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