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2026-08-25 - 01:59
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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 Tue Aug 25, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
242023626,0sleep20-21swapper/219:28:572
227123625,0sleep00-21swapper/019:27:110
225623525,0sleep10-21swapper/119:27:041
245523430,0sleep30-21swapper/319:29:183
339960,0migration/38227-21sh23:19:163
339960,0migration/331186-21taskset19:46:363
339960,0migration/330819-21timerandwakeup23:11:283
339960,0migration/328604-21sh00:16:343
339960,0migration/320246-21sendmail_mailqu20:46:253
339960,0migration/315338-21idleruntime21:31:183
339960,0migration/312693-21aten_r1power_cu00:01:163
29805060,0irq/28-eth0-rx-29514-21iostat_ios20:11:203
29805060,0irq/28-eth0-rx-22289-21ssh00:09:333
26829963,0cyclictest18718-21kworker/0:122:26:210
149960,0migration/031853-21sh23:13:510
149960,0migration/023516-21gltestperf22:51:180
149960,0migration/011145-21fschecks_count21:06:170
339950,0migration/39301-21kthreadcore23:01:203
339950,0migration/38850-21kthreadcore20:16:233
339950,0migration/38413-21munin-node20:41:213
339950,0migration/37412-21cpuspeed_turbos21:26:153
339950,0migration/36352-21taskset20:38:043
339950,0migration/36221-21kthreadcore21:01:213
339950,0migration/34493-21kthreadcore19:51:203
339950,0migration/332389-21sh00:42:403
339950,0migration/326287-21taskset23:46:553
339950,0migration/326000-21diskmemload22:13:043
339950,0migration/325334-21kthreadcore20:06:223
339950,0migration/323320-21kthreadcore23:26:233
339950,0migration/323320-21kthreadcore23:26:233
339950,0migration/321713-21sh21:51:233
339950,0migration/317748-21taskset21:11:143
339950,0migration/317155-21taskset20:23:513
339950,0migration/316844-21kthreadcore22:26:233
339950,0migration/313496-21kthreadcore21:46:193
339950,0migration/313022-21kthreadcore21:06:213
339950,0migration/310154-21idleruntime23:21:203
329950,0watchdog/34430-21grep22:21:183
329950,0watchdog/322548-21munin-node22:51:233
329950,0watchdog/317984-21cut20:01:223
329950,0watchdog/315979-21perl00:31:193
29815050,0irq/29-eth0-tx-21116-21munin-node20:06:190
29815050,0irq/29-eth0-tx-0-21swapper/021:16:160
29815050,0irq/29-eth0-tx-0-21swapper/020:26:210
29805050,0irq/28-eth0-rx-9701-21kthreadcore23:56:373
29805050,0irq/28-eth0-rx-716-21cut20:56:223
29805050,0irq/28-eth0-rx-5357-21kthreadcore22:01:233
29805050,0irq/28-eth0-rx-4976-21kthreadcore19:31:203
29805050,0irq/28-eth0-rx-30874-21kthreadcore22:36:223
29805050,0irq/28-eth0-rx-21593-21df20:51:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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