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2026-05-22 - 16:59
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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 100 highest latencies:
System rackdslot4.osadl.org (updated Fri May 22, 2026 00:45:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591229200,19phc2sys0-21swapper/319:05:583
89362211145,22sleep20-21swapper/219:08:412
88572201167,23sleep00-21swapper/019:07:400
88532200167,22sleep10-21swapper/119:07:361
2937321470,7sleep1938699cyclictest23:05:131
1384911210,0ptp4l391rcuc/322:30:203
1384911210,0ptp4l391rcuc/322:30:203
9386997011,15cyclictest194612cat22:45:121
257572690,2sleep30-21swapper/322:55:243
194602680,2sleep20-21swapper/222:45:122
938699648,16cyclictest18273-21systemctl22:40:241
138491620,1ptp4l401ktimersoftd/322:49:073
938699618,10cyclictest11771-21latency_hist00:40:011
138491590,1ptp4l401ktimersoftd/322:50:233
938699588,16cyclictest21623-21egrep21:45:111
938699579,17cyclictest30379-21cat20:55:201
247992570,2sleep30-21swapper/319:40:163
225952550,2sleep20-21swapper/221:45:192
938699549,10cyclictest24729-21cat21:50:181
938699548,16cyclictest1792-21apt-key00:20:011
938699546,18cyclictest0-21swapper/123:15:141
938699533,11cyclictest14543-21cpuspeed20:25:121
138491520,0ptp4l401ktimersoftd/322:38:273
138491510,0ptp4l401ktimersoftd/320:05:043
138491500,0ptp4l401ktimersoftd/321:52:503
9388994937,10cyclictest11619-21cron19:15:013
938699478,8cyclictest14764-21perl21:30:151
938699469,7cyclictest7140-21diskstats22:20:141
938699458,8cyclictest4662-21diskstats22:15:151
938699458,8cyclictest10520-21meminfo19:10:201
9388994430,12cyclictest41-21ksoftirqd/322:15:013
938799440,42cyclictest0-21swapper/223:00:242
938799440,42cyclictest0-21swapper/223:00:242
938699448,8cyclictest20282-21memory23:50:211
9386994439,3cyclictest30963-21sshd22:02:271
138491430,0ptp4l401ktimersoftd/320:16:193
138491430,0ptp4l401ktimersoftd/319:55:323
938699427,8cyclictest20117-21irqstats21:40:181
138491420,0ptp4l401ktimersoftd/323:30:243
138491420,0ptp4l401ktimersoftd/320:44:393
9386994135,3cyclictest14228-21cron20:25:001
9386994113,27cyclictest0-21swapper/123:00:431
9386994113,27cyclictest0-21swapper/123:00:431
9386994111,28cyclictest0-21swapper/123:25:431
938799400,39cyclictest0-21swapper/200:15:242
938699397,8cyclictest22284-21df22:50:131
9387993833,3cyclictest3074-21grep22:10:242
9387993810,26cyclictest0-21swapper/223:40:332
938599380,36cyclictest28775-21sh00:10:010
9388993731,3cyclictest41-21ksoftirqd/322:00:093
9387993731,4cyclictest33-21ksoftirqd/200:25:332
938699378,15cyclictest27868-21ls20:50:181
9386993732,3cyclictest25-21ksoftirqd/100:05:001
9385993731,4cyclictest9-21ksoftirqd/022:36:480
9385993731,4cyclictest9-21ksoftirqd/021:46:330
9385993730,5cyclictest9-21ksoftirqd/019:42:570
9388993630,3cyclictest41-21ksoftirqd/321:45:013
9388993629,4cyclictest41-21ksoftirqd/300:40:013
9387993631,3cyclictest33-21ksoftirqd/219:40:072
9387993631,3cyclictest33-21ksoftirqd/219:26:092
9387993630,4cyclictest33-21ksoftirqd/219:56:272
9387993630,4cyclictest33-21ksoftirqd/219:46:522
9387993629,5cyclictest33-21ksoftirqd/200:00:592
9386993630,4cyclictest25-21ksoftirqd/122:06:121
9385993630,4cyclictest9-21ksoftirqd/022:12:040
9385993630,4cyclictest9-21ksoftirqd/021:18:170
9385993629,4cyclictest9-21ksoftirqd/020:56:580
9388993529,4cyclictest41-21ksoftirqd/323:51:133
9388993529,4cyclictest41-21ksoftirqd/323:45:073
9388993529,4cyclictest41-21ksoftirqd/323:27:303
9388993529,4cyclictest41-21ksoftirqd/320:58:303
9388993529,4cyclictest41-21ksoftirqd/320:02:173
9388993529,4cyclictest41-21ksoftirqd/319:25:113
9388993529,4cyclictest41-21ksoftirqd/300:03:443
938799357,27cyclictest0-21swapper/223:50:332
938799357,26cyclictest0-21swapper/200:30:332
9387993530,3cyclictest33-21ksoftirqd/223:26:322
9387993530,3cyclictest33-21ksoftirqd/221:25:002
9387993529,4cyclictest33-21ksoftirqd/223:15:572
9387993529,4cyclictest33-21ksoftirqd/221:41:502
9387993529,4cyclictest33-21ksoftirqd/220:32:052
9387993529,4cyclictest33-21ksoftirqd/220:32:052
9387993529,4cyclictest33-21ksoftirqd/220:10:312
9386993529,4cyclictest25-21ksoftirqd/122:58:381
9386993529,4cyclictest25-21ksoftirqd/120:33:411
9386993529,4cyclictest25-21ksoftirqd/120:33:401
9386993529,4cyclictest25-21ksoftirqd/100:19:061
9385993530,3cyclictest9-21ksoftirqd/020:50:090
9385993529,4cyclictest9-21ksoftirqd/021:10:420
9385993529,4cyclictest9-21ksoftirqd/020:41:500
9385993529,4cyclictest9-21ksoftirqd/020:17:550
138491350,0ptp4l401ktimersoftd/323:45:003
138491350,0ptp4l401ktimersoftd/300:31:383
9388993429,3cyclictest41-21ksoftirqd/320:25:003
9388993428,4cyclictest41-21ksoftirqd/323:12:443
9388993428,4cyclictest41-21ksoftirqd/321:47:003
9388993428,4cyclictest41-21ksoftirqd/321:31:443
9388993428,4cyclictest41-21ksoftirqd/320:52:123
9388993428,4cyclictest41-21ksoftirqd/319:50:383
9388993428,4cyclictest41-21ksoftirqd/319:47:413
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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