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2026-03-18 - 15:14
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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 100 highest latencies:
System rackcslot2.osadl.org (updated Wed Mar 18, 2026 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
176652820,1sleep00-21swapper/008:59:350
645027254,8sleep10-21swapper/107:04:571
512326754,8sleep00-21swapper/007:04:300
68242660,1sleep10-21swapper/110:18:231
7112993911,10cyclictest91rcu_preempt11:58:261
7112993613,14cyclictest91rcu_preempt12:39:171
7112993612,3cyclictest91rcu_preempt10:24:271
7112993520,2cyclictest91rcu_preempt10:37:011
7112993511,3cyclictest24-21ksoftirqd/111:25:421
711299348,3cyclictest91rcu_preempt12:22:081
711299348,1cyclictest91rcu_preempt11:04:181
7112993415,2cyclictest91rcu_preempt09:19:181
7112993412,2cyclictest91rcu_preempt11:41:591
7112993324,5cyclictest91rcu_preempt10:06:561
7112993310,1cyclictest24-21ksoftirqd/109:38:061
711299328,2cyclictest91rcu_preempt11:09:121
7112993232,0cyclictest231ktimersoftd/110:54:351
7112993219,6cyclictest24-21ksoftirqd/111:15:041
7112993211,3cyclictest91rcu_preempt07:14:421
711299319,2cyclictest91rcu_preempt08:43:111
711299319,2cyclictest91rcu_preempt08:43:111
711299316,0cyclictest231ktimersoftd/109:48:051
711299313,8cyclictest91rcu_preempt10:00:561
7112993121,3cyclictest91rcu_preempt09:19:411
7111993128,2cyclictest0-21swapper/011:38:250
7112993027,2cyclictest19080-21memory09:49:371
7112993026,3cyclictest4625-21fschecks_time12:29:351
7112993026,2cyclictest21859-21memory09:09:361
7112993020,5cyclictest24-21ksoftirqd/112:05:061
7112993010,3cyclictest91rcu_preempt10:22:151
711299299,5cyclictest24-21ksoftirqd/110:32:271
7112992925,3cyclictest19212-21/usr/sbin/munin09:04:361
7112992925,3cyclictest13702-21ssh09:42:491
7111992924,2cyclictest802-21apache207:34:220
7112992826,1cyclictest24-21ksoftirqd/108:45:331
7112992825,2cyclictest25931-21/usr/sbin/munin10:44:341
7112992824,3cyclictest21933-21ssh09:54:241
7112992823,2cyclictest24-21ksoftirqd/111:20:151
7111992810,12cyclictest0-21swapper/011:31:130
711199280,26cyclictest0-21swapper/012:09:520
711199280,23cyclictest16660-21ssh12:00:120
711299279,1cyclictest231ktimersoftd/112:00:231
711299278,2cyclictest20964-21diskmemload11:52:341
7112992725,1cyclictest26620-21apache_processe07:59:331
7112992724,2cyclictest866-21diskstats12:24:331
7112992724,2cyclictest2292-21ssh10:10:551
7112992724,2cyclictest15330-21if_eth207:29:371
7112992724,2cyclictest1199-21runrttasks08:28:551
7112992723,3cyclictest30871-21if_err_eth208:09:371
7112992723,3cyclictest0-21swapper/111:34:331
7112992722,5cyclictest16929-21apache207:43:431
711299269,5cyclictest24-21ksoftirqd/108:59:421
711299266,2cyclictest91rcu_preempt07:54:401
7112992623,2cyclictest25080-21kworker/u4:212:14:011
7112992623,2cyclictest11800-21perl11:09:361
7112992623,2cyclictest0-21swapper/111:30:171
7112992623,2cyclictest0-21swapper/107:45:581
7112992622,3cyclictest32569-21df_inode09:24:341
7111992615,6cyclictest100450irq/109-eth1-tx10:38:340
7111992612,13cyclictest0-21swapper/009:33:550
711299253,19cyclictest10986-21/usr/sbin/munin07:19:421
7112992522,2cyclictest5726-21apache_volume08:29:321
7112992522,2cyclictest29657-21hwlatdetect10:49:371
7112992522,2cyclictest24853-21ssh10:42:581
7112992517,6cyclictest5058-21ssh09:29:431
7112992516,8cyclictest29007-21ssh12:18:331
711199250,22cyclictest0-21swapper/009:45:300
711299248,13cyclictest32738-21basename08:14:361
711299245,18cyclictest0-21swapper/111:45:491
7112992421,2cyclictest8681-21seq07:12:211
7112992421,2cyclictest23398-21ls07:49:371
7112992415,6cyclictest2118-21diskstats08:19:331
7111992422,1cyclictest0-21swapper/009:19:290
7111992410,7cyclictest0-21swapper/012:20:450
7111992410,5cyclictest0-21swapper/008:09:350
711199240,3cyclictest13923-21ssh11:12:100
7112992320,2cyclictest0-21swapper/108:54:041
7112992320,2cyclictest0-21swapper/108:04:321
7112992315,3cyclictest24-21ksoftirqd/108:54:351
7111992310,7cyclictest0-21swapper/010:31:010
7111992310,0cyclictest0-21swapper/009:38:480
2742322310,0sleep00-21swapper/010:00:520
711299222,13cyclictest0-21swapper/108:34:341
7112992218,3cyclictest13732-21pmu-power07:24:401
7112992210,1cyclictest101rcu_sched07:34:221
711199229,6cyclictest0-21swapper/008:44:380
711199223,2cyclictest20746-21kworker/u4:111:46:280
7111992218,3cyclictest6696-21apache207:22:320
711199218,9cyclictest0-21swapper/008:29:380
711199216,11cyclictest0-21swapper/008:49:390
7111992118,2cyclictest16929-21apache210:06:390
7111992116,4cyclictest27451-21ssh12:15:080
711199211,1cyclictest16835-21rm11:15:450
7111992110,9cyclictest0-21swapper/012:25:270
7111992110,8cyclictest0-21swapper/011:04:320
7111992110,5cyclictest0-21swapper/009:17:460
7111992110,1cyclictest0-21swapper/012:08:430
7111992110,0cyclictest0-21swapper/010:16:020
711199205,7cyclictest0-21swapper/011:54:340
711199204,8cyclictest0-21swapper/008:39:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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