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2026-06-27 - 19:45
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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 Sat Jun 27, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3209524738,0sleep30-21swapper/307:22:253
3206224435,0sleep10-21swapper/107:22:031
2646723724,0sleep00-21swapper/007:21:300
3211123425,0sleep20-21swapper/207:22:362
324949999,0cyclictest3524-21snmpd08:28:560
324949988,0cyclictest0-21swapper/009:27:420
8305060,0irq/26-0000:00:14822-21crond08:21:152
339960,0migration/39501-21sh11:32:493
339960,0migration/38213-21sh10:01:183
339960,0migration/37478-21sh12:27:113
339960,0migration/330438-21sh09:52:583
339960,0migration/327489-21sh11:44:493
339960,0migration/325308-21pmu-power10:26:363
339960,0migration/318347-21sh09:26:483
339960,0migration/316282-21diskmemload12:32:323
324959960,0cyclictest0-21swapper/112:25:221
324959960,0cyclictest0-21swapper/111:11:441
324949960,0cyclictest0-21swapper/012:43:320
29815060,0irq/29-eth0-tx-29447-21munin-node08:31:350
29805060,0irq/28-eth0-rx-9187-21kthreadcore10:56:333
29805060,0irq/28-eth0-rx-8888-21grep12:11:343
29805060,0irq/28-eth0-rx-31144-21kthreadcore09:16:333
29805060,0irq/28-eth0-rx-1697-21ssh10:16:203
149960,0migration/05391-21sh10:54:150
149960,0migration/026684-21sh11:42:350
149960,0migration/020376-21sh11:57:460
149960,0migration/019726-21sa112:56:160
149960,0migration/012334-21sh09:41:590
149960,0migration/011018-21sh11:36:260
339950,0migration/39783-21kthreadcore08:16:323
339950,0migration/39208-21switchtime12:46:433
339950,0migration/34097-21munin-node10:51:393
339950,0migration/332609-21munin-node12:41:383
339950,0migration/329738-21missed_timers11:06:363
339950,0migration/329304-21cpuspeed_turbos09:36:303
339950,0migration/329216-21taskset07:46:163
339950,0migration/328824-21munin-node10:31:313
339950,0migration/32831-21kthreadcore12:06:333
339950,0migration/326302-21latency_hist12:41:163
339950,0migration/326190-21kthreadcore07:41:343
339950,0migration/325638-21kthreadcore10:46:343
339950,0migration/322557-21kthreadcore09:31:333
339950,0migration/32060-21munin-node08:11:333
339950,0migration/319317-21needreboot11:56:363
339950,0migration/319009-21kthreadcore12:16:353
339950,0migration/316563-21kthreadcore07:36:323
339950,0migration/316078-21hddtemp_smartct11:01:313
339950,0migration/31259-21gltestperf07:26:323
324969955,0cyclictest0-21swapper/209:51:442
324969955,0cyclictest0-21swapper/207:46:342
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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