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2026-07-21 - 10:57
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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 100 highest latencies:
System rack1slot2.osadl.org (updated Tue Jul 21, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
988724948,0sleep00-21swapper/019:24:210
993724536,0sleep20-21swapper/219:24:522
1013223624,0sleep10-21swapper/119:27:111
1005823526,0sleep30-21swapper/319:26:213
8305060,0irq/26-0000:00:14074-21munin-run22:58:112
339960,0migration/33638-21sh00:06:453
339960,0migration/326660-21sh22:25:283
339960,0migration/324656-21munin-node23:38:383
339960,0migration/324038-21switchtime22:03:363
339960,0migration/323466-21munin-node00:38:253
339960,0migration/318172-21munin-node20:18:233
339960,0migration/312728-21sh00:13:113
29815060,0irq/29-eth0-tx-24903-21munin-node19:38:240
29805060,0irq/28-eth0-rx-23341-21ssh21:47:013
29805060,0irq/28-eth0-rx-22557-21perl21:28:243
29805060,0irq/28-eth0-rx-11504-21grep22:18:253
149960,0migration/022108-21sh00:35:160
149960,0migration/021488-21latency_hist20:43:100
149960,0migration/014636-21sh23:14:370
149960,0migration/013180-21kthreadcore22:18:290
149960,0migration/01079-21sh22:10:360
4150,0ktimersoftd/00-21swapper/000:55:390
339950,0migration/3975-21fschecks_count21:53:253
339950,0migration/37430-21kthreadcore22:33:293
339950,0migration/33831-21irqrtprio22:13:293
339950,0migration/330131-21latency_hist21:33:103
339950,0migration/329219-21fschecks_count20:03:243
339950,0migration/328956-21munin-node22:28:283
339950,0migration/328117-21kthreadcore21:08:293
339950,0migration/327957-21kthreadcore19:38:293
339950,0migration/324741-21kthreadcore00:18:283
339950,0migration/322238-21open_files23:18:343
339950,0migration/319496-21kthreadcore22:58:313
339950,0migration/318234-21kthreadcore22:38:303
339950,0migration/317377-21taskset20:14:323
339950,0migration/314456-21cpuspeed_turbos19:53:233
339950,0migration/314456-21cpuspeed_turbos19:53:233
339950,0migration/312807-21sh22:54:273
339950,0migration/310889-21latency_hist20:58:103
329950,0watchdog/38648-21kthreadcore21:38:303
329950,0watchdog/328995-21cut21:48:303
329950,0watchdog/323868-21grep19:33:333
329950,0watchdog/315576-21fschecks_time21:23:263
329950,0watchdog/312242-21wc23:53:263
329950,0watchdog/30-21swapper/320:33:303
329950,0watchdog/30-21swapper/319:43:293
29815050,0irq/29-eth0-tx-7210-21munin-node20:33:280
29815050,0irq/29-eth0-tx-5667-21ntp_kernel_pll_00:43:332
29815050,0irq/29-eth0-tx-28908-21ssh21:30:250
29815050,0irq/29-eth0-tx-24650-21munin-node23:23:282
29815050,0irq/29-eth0-tx-20225-21kthreadcore23:18:312
29815050,0irq/29-eth0-tx-10937-21munin-node20:58:260
29815050,0irq/29-eth0-tx-0-21swapper/222:08:012
29815050,0irq/29-eth0-tx-0-21swapper/200:34:322
29805050,0irq/28-eth0-rx-6899-21sshd21:14:393
29805050,0irq/28-eth0-rx-5052-21cat23:48:293
29805050,0irq/28-eth0-rx-29836-21kthreadcore22:08:303
29805050,0irq/28-eth0-rx-21408-21df22:43:243
29805050,0irq/28-eth0-rx-16450-21kthreadcore00:33:293
29805050,0irq/28-eth0-rx-15610-21pmu-power23:33:333
29805050,0irq/28-eth0-rx-10912-21kthreadcore23:13:313
29805050,0irq/28-eth0-rx-0-21swapper/323:05:583
29805050,0irq/28-eth0-rx-0-21swapper/300:15:373
259950,0migration/225537-21kthreadcore22:43:302
259950,0migration/222968-21sendmail_mailqu00:53:342
259950,0migration/213548-21gltestperf22:38:262
259950,0migration/211606-21fschecks_time22:18:252
249950,0watchdog/230054-21kthreadcore23:43:302
249950,0watchdog/218419-21grep21:43:302
249950,0watchdog/212244-21sed23:53:262
249950,0watchdog/20-21swapper/220:33:302
19150,0ktimersoftd/10-21swapper/122:06:051
179950,0migration/17379-21timerwakeupswit23:28:371
179950,0migration/17330-21cpuspeed_turbos19:48:231
179950,0migration/131081-21timerandwakeup23:23:381
179950,0migration/121506-21ntp_kernel_err21:43:321
179950,0migration/117898-21kthreadcore20:38:291
179950,0migration/110984-21timerandwakeup00:08:391
169950,0watchdog/122680-21kthreadcore23:38:301
169950,0watchdog/120001-21cpuspeed_turbos23:58:221
149950,0migration/07348-21latency_hist23:13:110
149950,0migration/07130-21kthreadcore20:08:300
149950,0migration/05157-21taskset21:34:520
149950,0migration/04403-21kthreadcore23:48:290
149950,0migration/03781-21kthreadcore21:13:300
149950,0migration/03350-21kthreadcore23:28:290
149950,0migration/030052-21kthreadcore23:43:300
149950,0migration/026910-21kthreadcore21:48:290
149950,0migration/025831-21fschecks_time20:23:250
149950,0migration/025541-21kthreadcore23:03:290
149950,0migration/025491-21pmu-power22:23:320
149950,0migration/023443-21aten_r1power_en00:38:250
149950,0migration/023048-21kthreadcore21:03:290
149950,0migration/022183-21fschecks_time19:58:250
149950,0migration/02201-21switchtime00:03:380
149950,0migration/02154-21munin-node22:28:410
149950,0migration/021377-21kthreadcore19:33:300
149950,0migration/021362-21cpuspeed_turbos22:43:240
149950,0migration/020955-21kthreadcore22:03:290
149950,0migration/017432-21latency_hist22:03:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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