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2026-07-30 - 09:34
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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 rack1slot2.osadl.org (updated Thu Jul 30, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
383024233,0sleep10-21swapper/119:26:541
371723626,0sleep30-21swapper/319:25:443
360323026,0sleep20-21swapper/219:24:232
380722824,0sleep00-21swapper/019:26:410
40929970,0cyclictest23129-21diskstats20:49:082
40929965,0cyclictest15183-21munin-run00:18:562
40929965,0cyclictest10923-21grep00:54:112
40789963,0cyclictest11468-21kworker/0:100:06:350
339960,0migration/32245-21kthreadcore21:39:133
339960,0migration/314124-21sh00:15:473
339960,0migration/313405-21munin-node23:39:133
339960,0migration/310036-21sh22:00:543
329960,0watchdog/329051-21sh00:04:553
29815060,0irq/29-eth0-tx-17039-21sed00:19:162
29805060,0irq/28-eth0-rx-27845-21perl23:29:103
29805060,0irq/28-eth0-rx-2354-21kthreadcore00:29:143
149960,0migration/025640-21kthreadcore22:49:120
149960,0migration/018449-21latency_hist23:23:560
149960,0migration/015779-21fschecks_time22:44:090
8305050,0irq/26-0000:00:8036-21latency_hist19:53:553
8305050,0irq/26-0000:00:0-21swapper/321:28:553
40929955,0cyclictest0-21swapper/223:03:562
40929954,0cyclictest3524-21snmpd19:34:432
40869955,0cyclictest0-21swapper/120:43:551
40869950,0cyclictest0-21swapper/123:39:431
40869950,0cyclictest0-21swapper/123:32:561
40869950,0cyclictest0-21swapper/123:26:091
40869950,0cyclictest0-21swapper/123:10:231
40869950,0cyclictest0-21swapper/121:41:281
40789954,0cyclictest18796-21sh23:40:020
40789953,0cyclictest3568-21kworker/0:222:29:470
40789953,0cyclictest3568-21kworker/0:222:24:390
40789953,0cyclictest3568-21kworker/0:222:19:510
40789953,0cyclictest3568-21kworker/0:222:09:350
40789953,0cyclictest3568-21kworker/0:222:07:210
40789953,0cyclictest3568-21kworker/0:221:59:410
40789953,0cyclictest3568-21kworker/0:221:54:050
40789953,0cyclictest3568-21kworker/0:221:40:490
40789953,0cyclictest3568-21kworker/0:221:36:090
40789953,0cyclictest31238-21kworker/0:122:35:510
40789953,0cyclictest30427-21kworker/0:000:20:110
40789953,0cyclictest30427-21kworker/0:000:10:050
40789953,0cyclictest24576-21kworker/0:023:49:350
40789953,0cyclictest24576-21kworker/0:023:44:510
40789953,0cyclictest24576-21kworker/0:023:34:570
40789953,0cyclictest24576-21kworker/0:023:30:470
40789953,0cyclictest24576-21kworker/0:023:16:570
40789953,0cyclictest24576-21kworker/0:022:58:050
40789953,0cyclictest11468-21kworker/0:123:55:190
40789953,0cyclictest11468-21kworker/0:100:00:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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