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2026-03-16 - 08:58
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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 rackdslot3.osadl.org (updated Mon Mar 16, 2026 00:45:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491212169,22phc2sys0-21swapper/319:08:373
178132207174,22sleep10-21swapper/119:08:011
178142203169,22sleep20-21swapper/219:08:032
178122202168,23sleep00-21swapper/019:08:010
1796528263,10sleep30-21swapper/319:10:013
271772700,1sleep00-21swapper/020:35:140
18261996127,8cyclictest41-21ksoftirqd/323:11:273
18261995924,4cyclictest41-21ksoftirqd/320:20:213
1825999597,12cyclictest14586-21latency_hist20:10:011
1825999588,11cyclictest23276-21sed23:50:011
1825999577,11cyclictest23632-21timerwakeupswit20:25:261
1825999566,12cyclictest9989-21latency_hist22:15:001
18261995529,8cyclictest41-21ksoftirqd/320:45:223
1825999542,10cyclictest0-21swapper/120:40:101
18261995224,3cyclictest41-21ksoftirqd/321:15:113
18259995210,11cyclictest30202-21dpkg19:35:011
1826199517,6cyclictest41-21ksoftirqd/319:25:183
18261995126,8cyclictest41-21ksoftirqd/322:55:143
18261995024,8cyclictest41-21ksoftirqd/300:05:163
18261995020,8cyclictest41-21ksoftirqd/323:15:153
1825999496,16cyclictest24975-21if_enp4s020:30:171
18261994820,8cyclictest41-21ksoftirqd/300:20:003
1826199476,5cyclictest41-21ksoftirqd/323:00:163
1826199476,5cyclictest41-21ksoftirqd/323:00:163
1826199472,6cyclictest41-21ksoftirqd/321:03:083
18260994641,3cyclictest2478-21cron19:45:002
18260994640,3cyclictest14378-21cron20:09:592
1826199455,6cyclictest41-21ksoftirqd/321:05:133
1826199454,7cyclictest41-21ksoftirqd/323:10:013
1826199453,5cyclictest41-21ksoftirqd/322:22:513
1826199453,5cyclictest41-21ksoftirqd/320:51:573
1826199451,5cyclictest41-21ksoftirqd/321:25:193
1825999458,9cyclictest20465-21iostat22:35:161
139391450,0ptp4l401ktimersoftd/322:39:573
1826199445,5cyclictest41-21ksoftirqd/319:45:223
1826199442,6cyclictest41-21ksoftirqd/322:51:213
18261994421,8cyclictest41-21ksoftirqd/320:30:223
1826199441,5cyclictest41-21ksoftirqd/321:51:413
1825999447,8cyclictest10922-21memory20:00:221
139391440,0ptp4l401ktimersoftd/320:59:053
1826199435,7cyclictest41-21ksoftirqd/321:55:173
1826199434,7cyclictest41-21ksoftirqd/321:12:243
1826199432,6cyclictest41-21ksoftirqd/323:42:423
18261994316,3cyclictest41-21ksoftirqd/300:25:263
139391430,0ptp4l401ktimersoftd/323:38:353
1826199427,3cyclictest41-21ksoftirqd/320:05:193
1826199425,6cyclictest41-21ksoftirqd/319:55:153
1826199425,6cyclictest41-21ksoftirqd/319:55:153
1826199425,6cyclictest41-21ksoftirqd/319:15:153
1826199424,8cyclictest41-21ksoftirqd/300:24:093
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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