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2026-07-22 - 11:10
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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 Wed Jul 22, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
462227069,0sleep30-21swapper/319:25:353
472323927,0sleep10-21swapper/119:26:451
447223828,0sleep20-21swapper/219:23:502
456022824,0sleep00-21swapper/019:24:520
49259965,0cyclictest16109-21diskmemload22:05:231
49259960,0cyclictest0-21swapper/123:07:401
339960,0migration/35715-21sh22:35:263
339960,0migration/33264-21kthreadcore22:53:353
339960,0migration/331505-21sh00:26:483
339960,0migration/329761-21sh00:07:053
339960,0migration/328787-21taskset23:28:333
339960,0migration/328296-21sh22:12:203
339960,0migration/322618-21sh22:44:533
339960,0migration/314712-21sh00:17:383
339960,0migration/31263-21sh23:12:013
339960,0migration/312607-21sh23:54:363
29805060,0irq/28-eth0-rx-4032-21cat23:13:353
29805060,0irq/28-eth0-rx-31746-21port_sshpriv00:43:403
29805060,0irq/28-eth0-rx-12080-21munin-run23:38:163
149960,0migration/0983-21sh23:11:110
149960,0migration/012721-21sh22:21:120
8305050,0irq/26-0000:00:5050-21wc19:28:163
8305050,0irq/26-0000:00:2694-21if_eth1.319:48:313
8305050,0irq/26-0000:00:10156-21awk20:38:322
49269955,0cyclictest0-21swapper/222:06:492
49269954,0cyclictest3524-21snmpd19:53:342
49269950,0cyclictest0-21swapper/222:42:272
49269950,0cyclictest0-21swapper/222:00:502
49269950,0cyclictest0-21swapper/221:41:172
49259953,0cyclictest14900-21awk22:23:361
49259950,0cyclictest0-21swapper/122:53:191
49259950,0cyclictest0-21swapper/122:33:181
49259950,0cyclictest0-21swapper/122:12:101
49259950,0cyclictest0-21swapper/100:26:011
49239955,0cyclictest0-21swapper/021:38:360
339950,0migration/39379-21fschecks_count19:53:293
339950,0migration/37411-21kthreadcore20:58:363
339950,0migration/36066-21munin-node00:28:363
339950,0migration/34557-21kthreadcore21:38:363
339950,0migration/3373-21missed_timers21:13:373
339950,0migration/332129-21kthreadcore22:13:343
339950,0migration/330481-21kthreadcore20:28:353
339950,0migration/329287-21munin-node20:03:403
339950,0migration/326723-21kthreadcore20:48:343
339950,0migration/325220-21kthreadcore23:43:343
339950,0migration/324243-21taskset00:40:143
339950,0migration/320047-21cpuspeed_turbos21:08:283
339950,0migration/319287-21taskset21:04:593
339950,0migration/318028-21munin-node22:03:373
339950,0migration/317764-21kthreadcore19:58:333
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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