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2026-06-06 - 02:34
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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 Sat Jun 06, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2922624938,0sleep10-21swapper/119:20:401
2939023627,0sleep30-21swapper/319:22:343
2948723425,0sleep20-21swapper/219:23:412
2938223329,0sleep00-21swapper/019:22:270
296339976,0cyclictest0-21swapper/219:44:562
35160,0ktimersoftd/30-21swapper/322:49:563
339960,0migration/3994-21sh22:33:033
339960,0migration/35137-21sh21:58:203
339960,0migration/331062-21sh22:13:013
339960,0migration/328892-21sh21:53:333
339960,0migration/313334-21sh23:15:203
329960,0watchdog/317888-21ssh23:55:103
29815060,0irq/29-eth0-tx-25312-21ntp_states22:44:522
29815060,0irq/29-eth0-tx-0-21swapper/021:24:420
29805060,0irq/28-eth0-rx-877-21grep00:44:433
29805060,0irq/28-eth0-rx-26388-21ssh22:46:183
29805060,0irq/28-eth0-rx-2359-21cat00:04:563
29805060,0irq/28-eth0-rx-2326-21iostat_ios19:49:463
296339966,0cyclictest0-21swapper/220:29:522
296339960,0cyclictest0-21swapper/220:44:412
27160,0ktimersoftd/20-21swapper/222:49:562
19160,0ktimersoftd/10-21swapper/123:08:071
149960,0migration/0987-21latency_hist19:49:300
149960,0migration/0923-21sh23:46:290
149960,0migration/018223-21fschecks_time23:39:440
8305050,0irq/26-0000:00:8574-21perf23:39:252
35150,0ktimersoftd/30-21swapper/323:51:593
339950,0migration/38812-21taskset23:34:373
339950,0migration/38319-21kthreadcore21:59:493
339950,0migration/35013-21taskset23:11:203
339950,0migration/332462-21kthreadcore00:24:483
339950,0migration/331093-21kthreadcore20:29:483
339950,0migration/33040-21latency_hist21:39:313
339950,0migration/326151-21timerandwakeup23:59:553
339950,0migration/326104-21kthreadcore00:39:493
339950,0migration/321961-21timerwakeupswit19:59:553
339950,0migration/319627-21aten2.4-expect21:09:433
339950,0migration/319444-21cpuspeed_turbos19:39:433
339950,0migration/317972-21munin-node22:24:453
339950,0migration/31728-21fschecks_count20:34:433
339950,0migration/316173-21kthreadcore22:39:493
339950,0migration/315652-21aten_r1power_en00:34:413
339950,0migration/315580-21ksmtuned23:19:433
339950,0migration/314555-21sendmail_mailtr22:19:533
339950,0migration/313783-21gltestperf22:59:443
339950,0migration/312440-21cpuspeed_turbos21:44:433
339950,0migration/311481-21kthreadcore21:24:483
339950,0migration/310084-21kthreadcore19:29:483
329950,0watchdog/318143-21python19:34:533
329950,0watchdog/317694-21aten_r1power_cu21:29:423
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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