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2026-03-10 - 01:28
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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 rackdslot1.osadl.org (updated Mon Mar 09, 2026 12:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
618521620,6sleep11211899cyclictest08:05:171
1794021620,4sleep01211799cyclictest07:20:210
1211999730,25cyclictest26796-21sed07:40:192
1211999722,21cyclictest0-21swapper/211:35:242
1211999711,22cyclictest13291-21date11:50:002
134491690,4ptp4l0-21swapper/310:00:193
134491690,4ptp4l0-21swapper/310:00:193
1211999682,20cyclictest4408-21cat08:00:292
1211999660,26cyclictest2484-21taskset09:06:152
1211999660,22cyclictest21546-21date08:40:012
12118996532,9cyclictest25-21ksoftirqd/111:45:151
151712640,3sleep10-21swapper/109:35:191
1211999642,24cyclictest0-21swapper/207:50:162
1211999640,26cyclictest23525-21chrt09:54:442
134491630,7ptp4l0-21swapper/207:06:232
134491630,3ptp4l33-21ksoftirqd/212:05:182
1211999630,21cyclictest4913-21mailstats10:20:252
1211999620,27cyclictest14559-21chrt10:40:502
12118996224,6cyclictest25-21ksoftirqd/107:40:181
12117996210,7cyclictest9-21ksoftirqd/009:05:010
1211999610,24cyclictest438-21/usr/sbin/munin07:55:252
12118996122,9cyclictest25-21ksoftirqd/111:10:271
12117996128,4cyclictest9-21ksoftirqd/012:05:010
134491600,5ptp4l0-21swapper/107:05:171
134491600,4ptp4l0-21swapper/009:22:260
1211999602,22cyclictest0-21swapper/209:47:382
1211999601,21cyclictest15882-21timerandwakeup07:15:252
134491590,3ptp4l0-21swapper/210:54:032
134491580,4ptp4l0-21swapper/207:20:282
134491580,4ptp4l0-21swapper/012:30:100
134491580,3ptp4l0-21swapper/109:00:131
134491580,15ptp4l0-21swapper/308:35:173
1211999583,19cyclictest0-21swapper/211:10:592
1211899585,9cyclictest25-21ksoftirqd/112:20:271
12118995830,7cyclictest25-21ksoftirqd/108:10:201
134491570,4ptp4l0-21swapper/210:46:082
134491570,3ptp4l0-21swapper/209:43:312
12118995721,9cyclictest25-21ksoftirqd/110:05:261
12118995721,8cyclictest25-21ksoftirqd/110:10:191
134491560,4ptp4l0-21swapper/008:14:510
1211999562,18cyclictest0-21swapper/208:10:142
1211999560,26cyclictest10604-21taskset11:41:402
1211999560,23cyclictest916-21apt-config10:15:022
12118995626,6cyclictest25-21ksoftirqd/109:50:191
134491550,4ptp4l0-21swapper/308:56:053
134491550,3ptp4l0-21swapper/312:25:423
134491550,3ptp4l0-21swapper/011:20:230
134491550,3ptp4l0-21swapper/011:20:230
134491550,3ptp4l0-21swapper/008:09:250
134491550,13ptp4l10095-21diskstats07:05:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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