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2025-10-23 - 07:55
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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 rackdslot4.osadl.org (updated Thu Oct 23, 2025 00:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
93952202168,23sleep20-21swapper/219:05:522
134791202168,22phc2sys0-21swapper/319:06:013
95852201167,22sleep00-21swapper/019:08:210
95912200166,22sleep10-21swapper/119:08:261
266562630,1sleep00-21swapper/022:55:270
200552580,1sleep00-21swapper/023:50:100
134991550,1ptp4l401ktimersoftd/322:00:133
134991540,1ptp4l401ktimersoftd/320:06:393
79202520,2sleep10-21swapper/120:10:151
10009995118,4cyclictest41-21ksoftirqd/322:19:593
134991490,1ptp4l401ktimersoftd/321:45:533
10009994820,4cyclictest41-21ksoftirqd/322:30:193
10009994814,8cyclictest41-21ksoftirqd/320:20:233
1000999472,42cyclictest5213-21sh00:25:013
10009994720,7cyclictest41-21ksoftirqd/319:55:243
10009994719,7cyclictest41-21ksoftirqd/319:45:263
10009994716,8cyclictest41-21ksoftirqd/321:10:293
10009994617,3cyclictest41-21ksoftirqd/320:30:143
10009994614,4cyclictest41-21ksoftirqd/323:55:163
10009994613,4cyclictest41-21ksoftirqd/323:30:013
10009994612,4cyclictest41-21ksoftirqd/300:35:003
134991450,0ptp4l401ktimersoftd/322:05:233
10009994515,4cyclictest41-21ksoftirqd/322:50:193
10009994514,7cyclictest41-21ksoftirqd/300:30:013
10009994513,4cyclictest41-21ksoftirqd/322:50:003
10009994513,4cyclictest41-21ksoftirqd/321:25:163
10009994510,8cyclictest41-21ksoftirqd/319:50:253
1000999450,3cyclictest121rcu_preempt23:45:003
1000899450,42cyclictest32243-21cron19:55:002
1000999449,4cyclictest41-21ksoftirqd/323:05:003
10009994416,7cyclictest41-21ksoftirqd/300:15:003
10009994415,8cyclictest41-21ksoftirqd/321:05:193
10009994414,4cyclictest41-21ksoftirqd/320:00:283
10009994413,4cyclictest41-21ksoftirqd/322:40:153
1000999441,2cyclictest121rcu_preempt22:00:003
10009994412,8cyclictest41-21ksoftirqd/321:16:123
10009994412,4cyclictest41-21ksoftirqd/320:10:163
10009994412,4cyclictest41-21ksoftirqd/300:35:243
10009994410,5cyclictest41-21ksoftirqd/300:10:003
10009994318,6cyclictest41-21ksoftirqd/319:10:253
10009994315,8cyclictest41-21ksoftirqd/321:35:153
1000999431,2cyclictest121rcu_preempt00:03:353
10009994311,4cyclictest41-21ksoftirqd/322:25:173
10008994333,6cyclictest33-21ksoftirqd/223:10:172
134991420,0ptp4l401ktimersoftd/323:45:243
134991420,0ptp4l401ktimersoftd/323:45:243
130891420,2getstats0-21swapper/323:14:133
10009994214,6cyclictest41-21ksoftirqd/322:55:133
10009994213,8cyclictest41-21ksoftirqd/320:55:173
10009994213,7cyclictest41-21ksoftirqd/322:25:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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