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2026-04-02 - 11:25
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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 Thu Apr 02, 2026 00:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3115521670,4sleep21801799cyclictest00:15:152
18015997817,58cyclictest14287-21/usr/sbin/munin20:10:150
18018997722,9cyclictest41-21ksoftirqd/323:20:153
18018996931,7cyclictest41-21ksoftirqd/321:55:003
18018996929,8cyclictest41-21ksoftirqd/323:35:003
1801599698,58cyclictest27536-21timerandwakeup00:05:260
18018996833,8cyclictest41-21ksoftirqd/323:10:003
18018996732,5cyclictest41-21ksoftirqd/320:00:263
18015996611,10cyclictest8227-21mailstats21:05:250
134491650,21ptp4l11867-21iostat20:05:181
18018996432,4cyclictest41-21ksoftirqd/323:40:173
18018996430,7cyclictest41-21ksoftirqd/319:40:143
1801599648,10cyclictest388-21gmain21:30:260
18018996332,8cyclictest41-21ksoftirqd/300:15:253
18018996330,9cyclictest41-21ksoftirqd/320:20:083
18015996314,11cyclictest1334-21taskset19:43:000
18018996232,9cyclictest41-21ksoftirqd/320:25:153
18018996232,7cyclictest41-21ksoftirqd/300:20:263
18018996227,7cyclictest41-21ksoftirqd/321:45:273
1801599629,10cyclictest30460-21latency19:35:170
18015996213,10cyclictest18664-21taskset23:49:550
18018996132,5cyclictest41-21ksoftirqd/319:35:233
18018996131,8cyclictest41-21ksoftirqd/320:05:263
18018996130,8cyclictest41-21ksoftirqd/300:00:133
18018996129,3cyclictest41-21ksoftirqd/300:10:003
18018996128,8cyclictest41-21ksoftirqd/321:30:223
18018996127,7cyclictest41-21ksoftirqd/322:55:203
18018996126,6cyclictest41-21ksoftirqd/320:10:143
18018996032,9cyclictest41-21ksoftirqd/319:20:153
18018996031,6cyclictest41-21ksoftirqd/321:05:253
18018996030,7cyclictest41-21ksoftirqd/319:25:133
18018996026,6cyclictest41-21ksoftirqd/319:15:133
18018996025,6cyclictest41-21ksoftirqd/321:10:273
18018996024,8cyclictest41-21ksoftirqd/319:55:013
18018996024,6cyclictest41-21ksoftirqd/319:30:253
1801599608,11cyclictest26334-21sed20:35:210
1801599608,11cyclictest16208-21latency_hist22:35:000
1801599608,11cyclictest16208-21latency_hist22:35:000
1801599608,10cyclictest29285-21mailstats23:00:240
18015996010,9cyclictest24042-21if_enp4s000:00:160
18018995932,8cyclictest41-21ksoftirqd/323:45:263
18018995927,6cyclictest41-21ksoftirqd/323:00:263
18018995926,7cyclictest41-21ksoftirqd/322:00:253
18018995926,7cyclictest41-21ksoftirqd/322:00:253
18018995925,8cyclictest41-21ksoftirqd/322:35:003
18018995925,8cyclictest41-21ksoftirqd/322:35:003
18018995925,7cyclictest41-21ksoftirqd/322:09:333
18018995925,6cyclictest41-21ksoftirqd/322:25:123
18018995924,9cyclictest41-21ksoftirqd/321:35:273
1801599599,9cyclictest0-21swapper/020:30:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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