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2026-09-11 - 10:10
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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 Fri Sep 11, 2026 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1505321720,3sleep0346499cyclictest00:10:280
217921540,3sleep20-21swapper/221:25:172
134491620,4ptp4l0-21swapper/023:45:160
134491620,4ptp4l0-21swapper/023:45:160
134491610,3ptp4l25326-21/usr/sbin/munin22:15:140
134491600,4ptp4l32128-21df22:30:131
134491600,4ptp4l32093-21apt-get23:40:122
3467995926,3cyclictest41-21ksoftirqd/322:18:203
134491590,26ptp4l41-21ksoftirqd/300:20:243
3467995831,4cyclictest41-21ksoftirqd/323:34:103
142762580,3sleep014278-21needreboot21:50:230
3467995716,9cyclictest41-21ksoftirqd/320:00:163
134491570,3ptp4l0-21swapper/322:10:183
134491570,3ptp4l0-21swapper/300:16:133
134491570,19ptp4l10250-21cat19:25:002
145122560,4sleep00-21swapper/020:40:250
134491560,4ptp4l0-21swapper/321:12:133
134491560,3ptp4l0-21swapper/322:33:593
3467995523,3cyclictest41-21ksoftirqd/321:50:003
3467995519,8cyclictest41-21ksoftirqd/300:36:123
134491550,4ptp4l0-21swapper/222:54:442
3467995419,9cyclictest41-21ksoftirqd/320:42:573
3467995418,3cyclictest41-21ksoftirqd/300:13:383
134491540,4ptp4l0-21swapper/323:25:563
134491540,4ptp4l0-21swapper/322:05:223
3467995320,5cyclictest41-21ksoftirqd/322:25:473
3467995317,7cyclictest41-21ksoftirqd/320:56:373
134491530,5ptp4l346599cyclictest19:39:041
134491530,5ptp4l0-21swapper/300:05:113
134491530,5ptp4l0-21swapper/200:20:242
134491530,4ptp4l0-21swapper/222:47:242
134491530,4ptp4l0-21swapper/222:47:242
134491530,3ptp4l0-21swapper/023:25:290
3467995220,4cyclictest41-21ksoftirqd/320:22:393
3467995218,8cyclictest41-21ksoftirqd/319:27:143
3467995216,4cyclictest41-21ksoftirqd/323:39:563
134491520,4ptp4l22044-21latency_hist19:50:003
134491520,4ptp4l0-21swapper/221:56:572
134491520,12ptp4l0-21swapper/122:02:581
3467995119,4cyclictest41-21ksoftirqd/319:10:153
3467995118,4cyclictest41-21ksoftirqd/321:24:053
134491510,4ptp4l346499cyclictest00:17:170
134491510,4ptp4l0-21swapper/319:34:333
134491510,4ptp4l0-21swapper/223:35:072
134491510,4ptp4l0-21swapper/023:31:230
134491510,4ptp4l0-21swapper/021:59:230
134491510,3ptp4l0-21swapper/322:20:133
134491510,3ptp4l0-21swapper/321:26:043
134491510,3ptp4l0-21swapper/123:15:141
134491510,3ptp4l0-21swapper/119:18:521
3467995022,3cyclictest41-21ksoftirqd/323:21:283
3467995020,6cyclictest41-21ksoftirqd/321:31:323
3467995020,4cyclictest41-21ksoftirqd/323:03:143
3467995019,4cyclictest41-21ksoftirqd/321:55:003
3467995018,7cyclictest41-21ksoftirqd/319:40:213
3467995017,4cyclictest41-21ksoftirqd/320:38:333
3467995017,4cyclictest41-21ksoftirqd/320:10:243
3467995016,3cyclictest41-21ksoftirqd/322:39:153
134491500,4ptp4l0-21swapper/022:00:310
134491500,4ptp4l0-21swapper/019:11:480
134491500,3ptp4l0-21swapper/222:22:012
134491500,3ptp4l0-21swapper/119:22:431
134491500,3ptp4l0-21swapper/019:22:140
346799493,2cyclictest0-21swapper/319:56:423
3467994920,7cyclictest41-21ksoftirqd/323:15:273
3467994915,7cyclictest41-21ksoftirqd/320:20:013
134491490,5ptp4l0-21swapper/019:08:120
134491490,4ptp4l0-21swapper/322:41:403
134491490,4ptp4l0-21swapper/119:11:501
134491490,3ptp4l0-21swapper/222:34:032
134491490,3ptp4l0-21swapper/221:36:302
346799482,4cyclictest0-21swapper/323:47:263
346799482,4cyclictest0-21swapper/323:47:263
346799482,2cyclictest0-21swapper/321:17:563
3467994817,6cyclictest41-21ksoftirqd/320:25:213
3467994817,3cyclictest41-21ksoftirqd/319:18:083
3467994816,8cyclictest41-21ksoftirqd/321:55:163
134491480,4ptp4l0-21swapper/323:59:173
134491480,4ptp4l0-21swapper/219:40:222
134491480,4ptp4l0-21swapper/200:39:512
134491480,4ptp4l0-21swapper/023:12:030
134491480,4ptp4l0-21swapper/022:36:410
134491480,3ptp4l0-21swapper/022:40:220
3467994718,7cyclictest41-21ksoftirqd/321:37:343
3467994716,3cyclictest41-21ksoftirqd/320:33:063
134491470,4ptp4l0-21swapper/222:37:342
134491470,4ptp4l0-21swapper/200:34:592
134491470,4ptp4l0-21swapper/200:12:442
134491470,4ptp4l0-21swapper/123:49:511
134491470,4ptp4l0-21swapper/123:49:511
134491470,4ptp4l0-21swapper/019:45:110
134491470,3ptp4l0-21swapper/322:52:153
346799468,8cyclictest41-21ksoftirqd/322:59:123
346799468,7cyclictest41-21ksoftirqd/321:00:143
346799463,3cyclictest0-21swapper/323:09:363
3467994616,4cyclictest41-21ksoftirqd/321:08:043
3467994614,7cyclictest41-21ksoftirqd/320:53:233
134491460,4ptp4l0-21swapper/300:25:133
134491460,4ptp4l0-21swapper/021:04:420
134491460,3ptp4l0-21swapper/223:22:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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