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2025-11-17 - 20:38
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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
Characteristics of the 50 highest latencies:
System rackcslot2.osadl.org (updated Mon Nov 17, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
492221000,0sleep10-21swapper/107:27:011
2894427057,8sleep00-21swapper/007:03:570
2884226955,9sleep10-21swapper/107:02:541
114862660,1sleep110819-21/usr/sbin/munin11:52:051
29398993210,18cyclictest0-21swapper/112:25:061
29398993010,2cyclictest0-21swapper/110:03:091
29398993010,14cyclictest0-21swapper/111:17:521
2939899290,25cyclictest18476-21/usr/sbin/munin08:02:001
29397992916,13cyclictest0-21swapper/008:49:320
29398992824,3cyclictest21786-21ssh09:19:061
2939899280,6cyclictest0-21swapper/110:01:051
2939799280,25cyclictest25625-21/usr/sbin/munin12:12:050
2939899277,19cyclictest0-21swapper/109:47:401
29398992725,1cyclictest24-21ksoftirqd/111:26:471
29398992710,11cyclictest0-21swapper/110:37:191
2939799270,3cyclictest0-21swapper/011:10:200
29398992610,13cyclictest0-21swapper/111:38:431
2939899260,21cyclictest0-21swapper/107:17:471
29397992610,3cyclictest0-21swapper/009:46:310
29398992525,0cyclictest0-21swapper/109:12:561
29398992516,3cyclictest29395-21cyclictest11:58:401
29398992515,7cyclictest0-21swapper/110:52:101
29398992510,3cyclictest0-21swapper/110:42:121
29398992510,14cyclictest0-21swapper/112:04:551
2939899250,18cyclictest0-21swapper/109:09:501
2939799250,23cyclictest20792-21kworker/0:107:25:110
29398992419,4cyclictest6862-21apache209:40:091
29398992419,3cyclictest0-21swapper/112:08:261
2939899241,2cyclictest0-21swapper/112:21:071
2939799243,20cyclictest0-21swapper/011:20:240
29397992410,6cyclictest0-21swapper/011:02:070
2939899233,14cyclictest0-21swapper/108:07:091
2939899231,4cyclictest0-21swapper/111:44:221
29398992310,8cyclictest0-21swapper/108:32:011
29398992310,8cyclictest0-21swapper/108:19:421
29398992310,7cyclictest0-21swapper/110:51:031
29398992310,10cyclictest0-21swapper/109:36:341
29397992321,1cyclictest21557-21ssh09:18:390
29397992315,8cyclictest0-21swapper/009:52:500
29397992310,0cyclictest0-21swapper/010:20:560
2939799230,3cyclictest0-21swapper/009:49:170
804922210,0sleep10-21swapper/111:05:541
2939899222,19cyclictest0-21swapper/112:15:091
29398992220,1cyclictest27281-21sendmail_mailqu10:07:111
29398992220,1cyclictest24-21ksoftirqd/109:22:101
29398992216,4cyclictest18540-21snmpd08:14:411
29398992214,6cyclictest636-21nscd08:22:011
29398992211,4cyclictest0-21swapper/109:52:041
29398992210,7cyclictest0-21swapper/109:28:511
29398992210,6cyclictest0-21swapper/110:27:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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