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2026-09-06 - 04:37
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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 Sun Sep 06, 2026 00:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2540621390,5sleep20-21swapper/222:00:272
2540621390,5sleep20-21swapper/222:00:272
1869121360,5sleep3912699cyclictest21:45:273
9125998418,63cyclictest32021-21users19:55:282
9125998418,63cyclictest32021-21users19:55:282
9125997815,61cyclictest0-21swapper/219:25:282
912599711,68cyclictest0-21swapper/220:10:282
38342710,5sleep03835-21ps20:05:230
317972700,3sleep20-21swapper/222:15:192
912499690,66cyclictest31476-21/usr/sbin/munin21:05:241
320322690,4sleep10-21swapper/100:35:191
109282670,1sleep010930-21phc2sys20:20:240
912499651,60cyclictest31989-21ntp_states22:15:241
134491650,3ptp4l4646-21ls22:25:260
912499641,60cyclictest12631-21iostat_ios20:25:201
912499640,60cyclictest29699-21ntp_states22:10:261
912499630,26cyclictest2842-21chrt22:24:211
912499620,59cyclictest8277-21irqstats20:15:191
912499620,59cyclictest28263-21df19:50:151
912499612,57cyclictest7170-21kworker/1:222:55:291
912499590,27cyclictest1317-21runrttasks20:54:461
134491590,4ptp4l0-21swapper/220:45:562
912499581,23cyclictest19054-21chrt21:49:551
134491580,5ptp4l0-21swapper/322:45:163
134491580,4ptp4l0-21swapper/000:30:210
134491580,3ptp4l0-21swapper/221:40:112
134491570,4ptp4l0-21swapper/021:25:180
134491570,3ptp4l0-21swapper/323:25:263
134491570,3ptp4l0-21swapper/300:34:103
134491570,3ptp4l0-21swapper/121:15:241
912599562,52cyclictest0-21swapper/221:32:492
912599562,52cyclictest0-21swapper/221:32:492
912499562,51cyclictest0-21swapper/120:10:131
912499560,27cyclictest25895-21chrt23:11:281
912499550,24cyclictest14221-21seq22:47:431
134491550,4ptp4l0-21swapper/022:11:370
134491550,3ptp4l0-21swapper/320:55:183
134491550,3ptp4l0-21swapper/223:45:352
134491550,3ptp4l0-21swapper/223:10:242
134491550,3ptp4l0-21swapper/220:06:512
134491550,12ptp4l7740-21meminfo19:05:201
134491550,12ptp4l7102-21diskstats19:05:160
912499548,21cyclictest16148-21taskset20:31:581
134491540,4ptp4l0-21swapper/021:35:400
134491540,4ptp4l0-21swapper/019:41:050
134491540,3ptp4l0-21swapper/321:05:293
134491540,3ptp4l0-21swapper/023:31:380
134491540,20ptp4l9-21ksoftirqd/021:05:000
134491540,10ptp4l6793-21apt-get19:05:123
912599531,50cyclictest0-21swapper/221:04:482
912499532,21cyclictest0-21swapper/123:05:301
9124995312,39cyclictest22416-21kworker/1:019:35:091
134491530,5ptp4l0-21swapper/021:30:180
134491530,5ptp4l0-21swapper/021:30:180
134491530,4ptp4l0-21swapper/320:41:253
134491530,4ptp4l0-21swapper/121:43:541
134491530,4ptp4l0-21swapper/021:22:380
134491530,3ptp4l0-21swapper/319:30:423
134491530,3ptp4l0-21swapper/121:35:201
134491530,3ptp4l0-21swapper/019:35:150
912499520,22cyclictest26551-21seq00:22:591
134491520,4ptp4l0-21swapper/020:46:400
134491520,3ptp4l0-21swapper/023:13:220
134491520,3ptp4l0-21swapper/023:05:280
134491520,3ptp4l0-21swapper/022:35:490
912499515,44cyclictest30414-21kworker/1:100:31:091
912499510,25cyclictest7328-21seq22:32:581
912499510,25cyclictest7328-21seq22:32:581
134491510,4ptp4l0-21swapper/319:12:373
134491510,4ptp4l0-21swapper/022:21:160
134491510,4ptp4l0-21swapper/020:00:460
134491510,3ptp4l0-21swapper/322:06:133
134491510,3ptp4l0-21swapper/020:40:130
912499501,24cyclictest16637-21taskset22:54:121
9124995011,37cyclictest30414-21kworker/1:123:39:491
912499500,26cyclictest30782-21taskset23:24:511
134691500,16getstats0-21swapper/220:43:552
134491500,4ptp4l0-21swapper/323:45:583
134491500,4ptp4l0-21swapper/323:08:143
134491500,4ptp4l0-21swapper/322:11:173
134491500,4ptp4l0-21swapper/019:17:500
134491500,10ptp4l0-21swapper/322:00:543
134491500,10ptp4l0-21swapper/322:00:543
912499492,19cyclictest0-21swapper/121:22:471
912499490,24cyclictest12133-21runrttasks23:50:451
912499490,21cyclictest21433-21runrttasks23:03:481
912499490,21cyclictest21433-21runrttasks23:03:481
134491490,4ptp4l0-21swapper/320:21:023
134491490,4ptp4l0-21swapper/320:07:063
134491490,4ptp4l0-21swapper/320:04:363
134491490,4ptp4l0-21swapper/019:58:230
134491490,4ptp4l0-21swapper/019:58:230
134491490,3ptp4l0-21swapper/021:14:540
912499480,23cyclictest4834-21taskset22:25:311
134491480,3ptp4l0-21swapper/023:24:040
134491480,13ptp4l0-21swapper/322:30:343
134491480,13ptp4l0-21swapper/322:30:343
912499470,46cyclictest22416-21kworker/1:019:26:091
912499470,16cyclictest134491ptp4l22:05:261
134491470,5ptp4l0-21swapper/219:45:032
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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