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2026-04-09 - 09:08
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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 Thu Apr 09, 2026 00:45:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1095821420,6sleep11006599cyclictest20:20:161
215622790,5sleep30-21swapper/321:50:243
134491650,5ptp4l0-21swapper/020:50:250
134491630,4ptp4l31631-21iostat19:55:170
134491620,3ptp4l25-21ksoftirqd/119:09:331
134491600,4ptp4l0-21swapper/121:25:261
134491590,17ptp4l0-21swapper/019:05:260
134491580,4ptp4l0-21swapper/322:50:163
134491580,12ptp4l0-21swapper/222:00:232
134491570,5ptp4l0-21swapper/321:15:133
134491570,4ptp4l0-21swapper/123:05:221
134491570,3ptp4l0-21swapper/322:38:533
134491570,3ptp4l0-21swapper/319:41:053
134491570,3ptp4l0-21swapper/123:43:341
134491560,4ptp4l0-21swapper/323:35:243
134491560,4ptp4l0-21swapper/122:30:221
134491560,3ptp4l0-21swapper/323:25:273
134491550,4ptp4l0-21swapper/321:47:123
134491550,4ptp4l0-21swapper/320:41:023
134491550,3ptp4l0-21swapper/200:30:162
134491550,3ptp4l0-21swapper/100:39:571
134491550,3ptp4l0-21swapper/100:05:171
134491540,4ptp4l0-21swapper/320:47:493
134491540,3ptp4l0-21swapper/021:05:450
134491530,4ptp4l0-21swapper/221:51:122
134491530,4ptp4l0-21swapper/021:53:580
10066995320,5cyclictest33-21ksoftirqd/220:40:002
10066995314,8cyclictest33-21ksoftirqd/221:30:172
134491520,4ptp4l0-21swapper/323:40:373
134491520,4ptp4l0-21swapper/323:08:343
134491520,4ptp4l0-21swapper/320:12:523
134491520,4ptp4l0-21swapper/000:18:470
134491520,3ptp4l747-21hddtemp_smartct00:35:160
134491520,3ptp4l0-21swapper/320:55:403
134491520,3ptp4l0-21swapper/320:55:403
134491520,3ptp4l0-21swapper/319:37:463
134491520,3ptp4l0-21swapper/022:08:460
1006599521,3cyclictest12084-21diskstats23:50:131
134491510,4ptp4l0-21swapper/000:04:400
134491510,3ptp4l0-21swapper/320:04:553
134491510,3ptp4l0-21swapper/022:58:080
134491500,5ptp4l41-21ksoftirqd/321:35:153
134491500,4ptp4l0-21swapper/319:12:143
134491500,3ptp4l0-21swapper/300:19:273
134491500,3ptp4l0-21swapper/100:32:491
132862500,4sleep00-21swapper/021:35:000
10066995018,6cyclictest33-21ksoftirqd/220:55:002
134491490,9ptp4l231rcuc/123:15:101
134491490,4ptp4l0-21swapper/323:17:533
134491490,3ptp4l0-21swapper/300:08:303
134491490,3ptp4l0-21swapper/220:26:182
134491490,2ptp4l212-21systemd-journal22:29:323
10066994918,4cyclictest33-21ksoftirqd/220:10:572
10066994916,5cyclictest33-21ksoftirqd/200:05:232
299572480,5sleep229491-21/usr/sbin/munin22:10:172
134491480,4ptp4l0-21swapper/019:43:590
134491480,4ptp4l0-21swapper/019:30:530
134491480,3ptp4l0-21swapper/123:12:471
134491480,12ptp4l4995-21fschecks_count23:35:152
10066994821,7cyclictest33-21ksoftirqd/221:10:262
10066994819,3cyclictest33-21ksoftirqd/220:20:002
10066994817,5cyclictest33-21ksoftirqd/221:00:262
134491470,4ptp4l0-21swapper/319:33:153
134491470,3ptp4l0-21swapper/320:50:593
134491470,3ptp4l0-21swapper/020:06:040
1006699473,3cyclictest121rcu_preempt23:43:592
1006699472,2cyclictest121rcu_preempt22:09:592
1006699472,2cyclictest121rcu_preempt00:27:592
10066994718,3cyclictest33-21ksoftirqd/223:26:292
10066994716,4cyclictest33-21ksoftirqd/223:22:562
10066994716,4cyclictest33-21ksoftirqd/221:47:252
10066994713,6cyclictest33-21ksoftirqd/219:25:222
134491460,6ptp4l0-21swapper/122:15:251
134491460,5ptp4l4505-21apt-get22:25:152
134491460,4ptp4l0-21swapper/221:55:122
134491460,4ptp4l0-21swapper/121:00:381
134491460,4ptp4l0-21swapper/023:14:450
134491460,4ptp4l0-21swapper/022:51:270
134491460,3ptp4l0-21swapper/322:22:563
134491460,3ptp4l0-21swapper/119:58:561
134491460,3ptp4l0-21swapper/023:36:170
1006699463,2cyclictest121rcu_preempt23:19:582
1006699462,2cyclictest121rcu_preempt21:19:592
1006699462,2cyclictest121rcu_preempt21:09:592
10066994620,5cyclictest33-21ksoftirqd/220:05:562
10066994614,6cyclictest33-21ksoftirqd/220:55:242
10066994614,6cyclictest33-21ksoftirqd/220:55:242
10066994613,5cyclictest33-21ksoftirqd/220:00:172
134691450,12getstats11368-21latency20:20:182
134491450,4ptp4l27264-21apt-get20:55:121
134491450,4ptp4l27264-21apt-get20:55:111
134491450,4ptp4l0-21swapper/319:20:073
134491450,4ptp4l0-21swapper/122:24:471
134491450,4ptp4l0-21swapper/121:56:281
134491450,4ptp4l0-21swapper/121:24:551
134491450,4ptp4l0-21swapper/022:35:150
134491450,3ptp4l0-21swapper/323:49:383
134491450,3ptp4l0-21swapper/323:12:233
134491450,3ptp4l0-21swapper/321:09:103
134491450,3ptp4l0-21swapper/121:09:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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