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2026-05-28 - 15:07
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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 100 highest latencies:
System rackbslot7.osadl.org (updated Thu May 28, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7643991153,72cyclictest18290-21taskset10:50:343
7637991153,90cyclictest18226-21apt-get10:50:342
7643991103,94cyclictest3957-21chrt11:20:293
7637991103,81cyclictest16792-21apt-get09:55:322
76379910811,51cyclictest3926-21apt-get11:20:342
7637991078,46cyclictest12523-21/usr/sbin/munin08:51:422
7637991074,52cyclictest27045-21tail10:10:512
738021076,16sleep00-21swapper/006:58:590
76379910649,16cyclictest14646-21switchtime09:51:292
7637991042,78cyclictest10664-21apt-get08:45:382
6684210316,50sleep26724-21ntpq06:56:452
76299910274,12cyclictest181rcu_preempt08:51:321
1202821020,6sleep30-21swapper/310:40:293
7620999776,8cyclictest0-21swapper/010:10:380
7637999510,30cyclictest0-21swapper/210:05:562
7629999469,17cyclictest12454-21latency_hist08:50:191
7629999356,8cyclictest181rcu_preempt10:25:151
7620999312,46cyclictest15-21ksoftirqd/010:38:380
7637999260,8cyclictest39-21ksoftirqd/212:14:372
7637999111,48cyclictest5787-21apt-get10:30:292
7637999111,48cyclictest5787-21apt-get10:30:292
763799908,62cyclictest8472-21apt-get10:35:282
7637998945,12cyclictest181rcu_preempt11:55:372
7637998859,12cyclictest8816-21kworker/u17:1-flush-179:007:15:432
7637998847,29cyclictest7008-21modprobe09:40:142
7637998847,29cyclictest7008-21modprobe09:40:142
7620998870,9cyclictest0-21swapper/007:55:490
762099883,56cyclictest15-21ksoftirqd/008:25:060
7629998771,10cyclictest23224-21diskmemload10:06:021
7629998767,10cyclictest0-21swapper/107:05:391
7629998767,10cyclictest0-21swapper/107:05:391
762999876,50cyclictest31-21ksoftirqd/109:30:181
762999876,50cyclictest31-21ksoftirqd/109:30:181
7629998716,42cyclictest31-21ksoftirqd/110:04:001
7629998716,42cyclictest31-21ksoftirqd/110:04:001
7620998710,47cyclictest15-21ksoftirqd/011:14:430
7620998710,47cyclictest15-21ksoftirqd/011:14:430
7629998667,10cyclictest0-21swapper/109:15:171
7629998665,15cyclictest27010-21threads07:55:491
7620998670,9cyclictest0-21swapper/011:55:460
763799853,60cyclictest3460-21apt-get08:25:282
762099858,46cyclictest15-21ksoftirqd/010:49:130
762099858,46cyclictest15-21ksoftirqd/010:49:130
7620998569,11cyclictest24380-21kworker/u18:2-rpciod11:17:290
7620998554,23cyclictest0-21swapper/009:40:500
764399845,44cyclictest0-21swapper/310:36:413
7637998459,19cyclictest15511-21diskmemload12:15:492
7629998470,8cyclictest0-21swapper/108:15:401
7629998470,8cyclictest0-21swapper/108:15:401
7629998462,12cyclictest0-21swapper/109:35:381
7629998462,12cyclictest0-21swapper/109:35:381
7629998458,7cyclictest181rcu_preempt10:49:561
7629998458,7cyclictest181rcu_preempt10:49:561
7620998463,11cyclictest15511-21diskmemload11:05:170
7620998463,11cyclictest15511-21diskmemload11:05:170
7620998414,41cyclictest15-21ksoftirqd/011:47:590
762099841,43cyclictest15-21ksoftirqd/012:09:080
762099841,43cyclictest15-21ksoftirqd/012:09:080
7643998311,41cyclictest0-21swapper/309:55:363
763799832,33cyclictest9193-21latency_hist07:05:172
7629998362,10cyclictest0-21swapper/110:45:171
7629998362,10cyclictest0-21swapper/107:45:361
762999831,37cyclictest31-21ksoftirqd/111:29:081
7620998363,11cyclictest0-21swapper/008:45:170
7620998362,7cyclictest181rcu_preempt09:37:490
7620998362,7cyclictest181rcu_preempt09:37:490
7620998354,21cyclictest0-21swapper/010:50:320
7620998312,41cyclictest15-21ksoftirqd/011:36:450
7637998261,13cyclictest39-21ksoftirqd/212:30:172
763799824,48cyclictest31300-21latency09:25:402
763799824,48cyclictest31300-21latency09:25:402
763799822,55cyclictest27594-21apt-get08:00:292
7629998265,9cyclictest0-21swapper/111:20:341
7629998265,8cyclictest0-21swapper/111:55:451
7629998265,11cyclictest14562-21sh11:37:221
7629998264,9cyclictest0-21swapper/107:40:491
7629998264,9cyclictest0-21swapper/107:40:491
7629998256,8cyclictest181rcu_preempt12:19:231
7620998264,12cyclictest18805-21/usr/sbin/munin09:05:370
7620998258,15cyclictest12019-21latency_hist08:50:190
7620998211,43cyclictest15-21ksoftirqd/010:19:370
7637998152,19cyclictest0-21swapper/207:35:172
7629998159,12cyclictest0-21swapper/108:30:361
7629998159,12cyclictest0-21swapper/108:30:361
7629998133,20cyclictest30471-21sh12:05:041
7620998112,41cyclictest15-21ksoftirqd/011:34:560
7620998112,41cyclictest15-21ksoftirqd/011:34:560
7629998053,8cyclictest181rcu_preempt07:15:431
7620998063,9cyclictest0-21swapper/009:20:480
7620998055,7cyclictest181rcu_preempt10:58:200
7620998015,37cyclictest15-21ksoftirqd/012:25:020
7620998015,37cyclictest15-21ksoftirqd/012:25:020
7637997949,9cyclictest181rcu_preempt10:25:452
7637997949,9cyclictest181rcu_preempt10:25:452
7637997938,17cyclictest181rcu_preempt07:30:172
7637997935,14cyclictest181rcu_preempt07:15:172
7629997963,8cyclictest0-21swapper/111:15:491
7629997956,13cyclictest0-21swapper/110:15:501
7629997947,16cyclictest181rcu_preempt09:08:201
7620997954,17cyclictest9358-21munin-setwarn07:05:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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