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2026-03-11 - 09:04
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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
Characteristics of the 50 highest latencies:
System rackeslot2.osadl.org (updated Wed Mar 11, 2026 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
227966121050,2sleep30-21swapper/300:05:013
206323921000,1sleep00-21swapper/022:01:450
20069302970,2sleep20-21swapper/221:31:052
20069302970,2sleep20-21swapper/221:31:052
19694572790,1sleep11969456-21/usr/sbin/munin21:06:481
23081632380,1sleep20-21swapper/200:21:432
23306482290,2sleep20-21swapper/200:32:092
1822411992616,8cyclictest2112011-21munin-run22:30:010
1822413992218,2cyclictest0-21swapper/100:40:011
1822411992216,4cyclictest1867036-21munin-run19:45:020
1822411992214,6cyclictest0-21swapper/021:55:010
1822413992118,2cyclictest2111878-21grep22:30:001
1822413992016,2cyclictest1327-21in:imuxsock20:45:011
1822411992017,2cyclictest1909174-21sh20:20:000
1822411992014,5cyclictest2076818-21latency_hist22:10:000
1822411992014,4cyclictest2339235-21unixbench_singl00:36:540
1822411992013,6cyclictest2144554-21/usr/sbin/munin22:46:480
1822411992013,5cyclictest2264533-21kthreadcore23:56:460
1822411992010,6cyclictest1889418-21kthreadcore20:01:470
2649091190,2phc2sys0-21swapper/323:44:183
2649091190,2phc2sys0-21swapper/300:23:183
1822417991916,1cyclictest0-21swapper/221:50:002
1822417991916,1cyclictest0-21swapper/219:26:422
1822413991916,2cyclictest2120589-21perf22:35:001
1822413991916,2cyclictest1903242-21cut20:15:011
1822413991912,3cyclictest2249181-21kthreadcore23:46:461
1822411991912,6cyclictest2231683-21kthreadcore23:36:470
1822411991912,6cyclictest2231683-21kthreadcore23:36:470
1822411991910,4cyclictest0-21swapper/021:21:440
2649091180,4phc2sys0-21swapper/319:41:433
2649091180,2phc2sys0-21swapper/323:59:493
2649091180,2phc2sys0-21swapper/323:28:353
2649091180,2phc2sys0-21swapper/322:54:483
2649091180,2phc2sys0-21swapper/322:04:073
1822417991815,1cyclictest0-21swapper/222:50:012
1822417991815,1cyclictest0-21swapper/221:36:532
1822417991815,1cyclictest0-21swapper/220:20:012
182241399188,5cyclictest0-21swapper/100:16:481
1822413991815,2cyclictest2182534-21cron23:10:021
1822413991815,2cyclictest2083066-21mailstats22:11:491
1822413991815,2cyclictest1976851-21systemctl21:11:501
1822413991814,2cyclictest1286-21avahi-daemon20:00:011
1822411991815,2cyclictest2085482-21latency_hist22:15:000
1822411991815,2cyclictest1326-21systemd-logind23:25:010
1822411991814,2cyclictest1286-21avahi-daemon22:00:020
1822411991812,5cyclictest2257677-21kthreadcore23:51:450
1822411991812,5cyclictest1985582-21ptp4l21:16:500
182241199180,11cyclictest0-21swapper/023:11:380
2902298170,2rtkit-daemon0-21swapper/100:26:211
2649091170,2phc2sys0-21swapper/322:21:223
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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