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2026-07-21 - 22:05
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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 rackdslot1.osadl.org (updated Tue Jul 21, 2026 00:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2811321230,7sleep12456199cyclictest23:55:171
24560996428,7cyclictest9-21ksoftirqd/022:40:250
59062620,4sleep20-21swapper/219:40:002
59062620,4sleep20-21swapper/219:40:002
134491610,3ptp4l29468-21/usr/sbin/munin22:50:262
24560996029,6cyclictest9-21ksoftirqd/021:10:230
24560995932,7cyclictest9-21ksoftirqd/023:45:230
24560995931,9cyclictest9-21ksoftirqd/021:00:150
24560995928,7cyclictest9-21ksoftirqd/020:55:270
24560995927,3cyclictest9-21ksoftirqd/000:00:170
24560995924,11cyclictest9-21ksoftirqd/023:20:150
24560995923,7cyclictest9-21ksoftirqd/023:55:180
24560995920,8cyclictest9-21ksoftirqd/020:00:160
154962590,3sleep1231rcuc/100:35:241
134491590,5ptp4l0-21swapper/222:28:442
24560995826,4cyclictest9-21ksoftirqd/023:15:140
24560995820,3cyclictest9-21ksoftirqd/023:35:000
134491580,4ptp4l0-21swapper/121:31:491
134491580,4ptp4l0-21swapper/019:40:440
134491580,4ptp4l0-21swapper/019:32:500
24560995725,6cyclictest9-21ksoftirqd/000:15:140
24560995710,2cyclictest9-21ksoftirqd/000:05:190
134491570,3ptp4l0-21swapper/120:05:281
24560995626,4cyclictest9-21ksoftirqd/022:20:250
134491560,5ptp4l0-21swapper/321:12:113
134491560,4ptp4l0-21swapper/120:56:271
134491560,3ptp4l0-21swapper/300:25:303
134491560,3ptp4l0-21swapper/200:05:402
24560995524,7cyclictest9-21ksoftirqd/000:35:150
134491550,3ptp4l0-21swapper/321:46:143
134491550,3ptp4l0-21swapper/221:35:302
28972540,3sleep30-21swapper/321:50:273
2456099544,7cyclictest9-21ksoftirqd/022:40:000
2456099544,4cyclictest31415-21awk20:35:000
2456099543,6cyclictest9-21ksoftirqd/020:40:160
24560995424,7cyclictest9-21ksoftirqd/022:25:190
134491540,5ptp4l0-21swapper/219:09:562
134491540,4ptp4l0-21swapper/322:37:473
134491540,4ptp4l0-21swapper/019:22:540
134491540,3ptp4l0-21swapper/119:50:191
2456199535,3cyclictest134491ptp4l20:40:231
24561995329,21cyclictest25-21ksoftirqd/120:50:111
2456099538,4cyclictest8639-21df_abs19:45:150
2456099538,3cyclictest9-21ksoftirqd/020:15:170
24560995324,6cyclictest9-21ksoftirqd/019:10:230
24560995323,3cyclictest9-21ksoftirqd/000:10:200
134491530,4ptp4l0-21swapper/320:21:163
134491530,4ptp4l0-21swapper/023:31:210
134491530,3ptp4l0-21swapper/020:23:490
24560995214,5cyclictest9-21ksoftirqd/022:30:000
134491520,4ptp4l0-21swapper/300:14:043
134491520,4ptp4l0-21swapper/220:32:512
2456199514,45cyclictest3599-21kworker/1:223:33:091
2456099515,4cyclictest9-21ksoftirqd/023:00:150
2456099514,6cyclictest9-21ksoftirqd/022:45:280
24560995140,3cyclictest9-21ksoftirqd/021:39:590
2456099513,7cyclictest9-21ksoftirqd/020:40:000
2456099513,4cyclictest9-21ksoftirqd/021:40:250
2456099513,3cyclictest0-21swapper/019:55:160
134491510,9ptp4l22793-21/usr/sbin/munin19:05:181
134491510,3ptp4l0-21swapper/222:49:382
134491510,3ptp4l0-21swapper/020:08:120
24563995021,4cyclictest41-21ksoftirqd/323:20:203
2456299501,3cyclictest6775-21iostat20:50:192
2456099505,3cyclictest9-21ksoftirqd/020:30:000
2456099502,6cyclictest25541-21irqrtprio21:30:190
2456099502,2cyclictest29036-21latency_hist19:20:010
2456099501,6cyclictest9-21ksoftirqd/019:50:290
134491500,3ptp4l311rcuc/223:40:222
134491500,3ptp4l0-21swapper/323:53:563
134491500,3ptp4l0-21swapper/200:04:092
134491500,13ptp4l24362-21sort19:10:003
134491500,10ptp4l21770-21apt-get19:05:020
2456099494,5cyclictest9-21ksoftirqd/022:50:210
2456099493,6cyclictest9-21ksoftirqd/000:25:140
2456099493,3cyclictest0-21swapper/021:55:290
2456099492,3cyclictest0-21swapper/000:20:290
24560994917,5cyclictest9-21ksoftirqd/021:29:590
24560994915,4cyclictest9-21ksoftirqd/023:00:000
134491490,4ptp4l0-21swapper/121:10:511
24563994826,9cyclictest41-21ksoftirqd/320:15:193
2456099483,5cyclictest9-21ksoftirqd/020:50:260
24560994821,5cyclictest9-21ksoftirqd/023:25:160
2456099481,6cyclictest9-21ksoftirqd/023:40:260
134491480,3ptp4l0-21swapper/322:17:573
134491480,3ptp4l0-21swapper/223:37:462
134491480,14ptp4l33-21ksoftirqd/220:01:492
24563994721,7cyclictest41-21ksoftirqd/319:50:193
24563994718,4cyclictest41-21ksoftirqd/300:18:113
24563994715,4cyclictest41-21ksoftirqd/322:09:193
24563994715,4cyclictest41-21ksoftirqd/300:21:413
2456099475,2cyclictest0-21swapper/023:10:190
2456099474,5cyclictest9-21ksoftirqd/022:04:590
2456099474,4cyclictest13784-21irqrtprio21:05:190
2456099473,5cyclictest9-21ksoftirqd/021:45:130
2456099473,3cyclictest121rcu_preempt20:10:210
2456099473,2cyclictest0-21swapper/022:15:150
2456099472,9cyclictest0-21swapper/021:50:170
2456099472,5cyclictest9-21ksoftirqd/019:25:290
2456099472,2cyclictest0-21swapper/000:30:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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