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2026-09-22 - 11:49
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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 Sep 22, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1860423928,0sleep00-21swapper/019:31:540
1859423728,0sleep30-21swapper/319:31:493
1865323525,0sleep10-21swapper/119:32:271
1844723525,0sleep20-21swapper/219:30:032
339970,0migration/35385-21munin-node20:53:353
339970,0migration/329103-21sh00:19:123
339960,0migration/39360-21sh23:32:133
339960,0migration/36737-21sh00:28:093
339960,0migration/34714-21sh22:49:283
339960,0migration/328372-21sh22:44:063
339960,0migration/327111-21aten_r1power_cu23:43:343
329960,0watchdog/36314-21runrttasks23:18:213
329960,0watchdog/317065-21sh22:01:563
29805060,0irq/28-eth0-rx-25723-21sed21:48:383
29805060,0irq/28-eth0-rx-0-21swapper/322:55:293
29805060,0irq/28-eth0-rx-0-21swapper/322:13:423
188079960,0cyclictest0-21swapper/220:28:542
188039965,0cyclictest0-21swapper/122:13:391
188029965,0cyclictest30183-21diskmemload23:53:170
149960,0migration/08918-21kthreadcore22:53:430
149960,0migration/011122-21kthreadcore20:33:380
339950,0migration/37659-21kthreadcore00:08:393
339950,0migration/36683-21sh23:09:463
339950,0migration/35749-21kthreadcore00:43:413
339950,0migration/331576-21sh00:40:383
339950,0migration/331012-21kthreadcore21:08:403
339950,0migration/330373-21munin-node00:03:373
339950,0migration/329229-21sh22:28:353
339950,0migration/328940-21munin-node20:43:413
339950,0migration/328593-21kthreadcore22:08:393
339950,0migration/326041-21fschecks_time23:23:343
339950,0migration/325582-21sh22:06:453
339950,0migration/323458-21kthreadcore19:33:413
339950,0migration/321621-21kthreadcore23:18:413
339950,0migration/321315-21kthreadcore21:03:393
339950,0migration/312856-21hddtemp_smartct23:53:373
339950,0migration/312264-21latency_hist20:58:213
339950,0migration/31114-21latency_hist20:28:213
329950,0watchdog/35245-21fschecks_time22:33:363
329950,0watchdog/332295-21missed_timers20:23:443
329950,0watchdog/3298050irq/28-eth0-rx-00:37:413
329950,0watchdog/329184-21nfs_client21:28:403
329950,0watchdog/321327-21kthreadcore20:38:403
329950,0watchdog/30-21swapper/321:23:363
329950,0watchdog/30-21swapper/319:58:403
29815050,0irq/29-eth0-tx-7632-21ssh23:12:322
29815050,0irq/29-eth0-tx-6663-21munin-node21:38:372
29815050,0irq/29-eth0-tx-3524-21snmpd21:28:500
29815050,0irq/29-eth0-tx-30830-21kthreadcore22:28:392
29815050,0irq/29-eth0-tx-28768-21kthreadcore23:23:382
29815050,0irq/29-eth0-tx-20102-21ssh22:39:552
29815050,0irq/29-eth0-tx-0-21swapper/223:50:032
29815050,0irq/29-eth0-tx-0-21swapper/222:25:192
29815050,0irq/29-eth0-tx-0-21swapper/200:43:382
29815050,0irq/29-eth0-tx-0-21swapper/200:33:262
29805050,0irq/28-eth0-rx-6314-21runrttasks00:28:323
29805050,0irq/28-eth0-rx-5645-40yum-updatesd-he21:36:293
29805050,0irq/28-eth0-rx-4270-21kthreadcore21:53:443
29805050,0irq/28-eth0-rx-18100-21fschecks_count00:53:383
29805050,0irq/28-eth0-rx-14916-21munin-node00:13:403
29805050,0irq/28-eth0-rx-1173-21ssh01:00:513
29805050,0irq/28-eth0-rx-0-21swapper/323:48:343
29805050,0irq/28-eth0-rx-0-21swapper/323:39:053
29805050,0irq/28-eth0-rx-0-21swapper/323:33:353
29805050,0irq/28-eth0-rx-0-21swapper/323:03:333
29805050,0irq/28-eth0-rx-0-21swapper/322:23:383
29805050,0irq/28-eth0-rx-0-21swapper/322:21:103
29805050,0irq/28-eth0-rx-0-21swapper/321:43:403
27150,0ktimersoftd/20-21swapper/200:24:362
259950,0migration/25840-21kthreadcore21:53:442
259950,0migration/23321-21kthreadcore19:43:372
259950,0migration/222349-21kthreadcore22:03:392
249950,0watchdog/20-21swapper/200:58:412
22485250,0sleep20-21swapper/223:01:312
188079955,0cyclictest0-21swapper/222:21:372
188079955,0cyclictest0-21swapper/222:09:482
188079953,0cyclictest3571-21lldpd20:35:462
188079950,0cyclictest0-21swapper/222:15:282
188079950,0cyclictest0-21swapper/200:04:342
188039955,0cyclictest0-21swapper/123:49:501
188029950,0cyclictest0-21swapper/021:46:220
179950,0migration/15756-21ntp_offset23:08:431
179950,0migration/13639-21sh00:04:441
179950,0migration/13008-21latency_hist23:48:221
179950,0migration/123035-21kthreadcore22:23:401
179950,0migration/120820-21kthreadcore21:43:401
179950,0migration/117199-21kthreadcore20:58:401
179950,0migration/114767-21taskset21:42:291
179950,0migration/114502-21rt-features19:48:431
179950,0migration/110183-21gltestperf21:58:341
179950,0migration/110143-21kthreadcore20:53:401
169950,0watchdog/1693-21kthreadcore00:23:411
169950,0watchdog/118831-21iostat_ios00:53:411
149950,0migration/05006-21latency_hist20:53:220
149950,0migration/04208-21kthreadcore00:23:420
149950,0migration/04151-21munin-node22:13:380
149950,0migration/031324-21sh23:23:400
149950,0migration/029068-21kthreadcore00:58:400
149950,0migration/027800-21kthreadcore23:03:400
149950,0migration/027387-21hddtemp_smartct20:23:390
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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