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2026-03-22 - 04:18
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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 Mar 22, 2026 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1994421250,6sleep11845799cyclictest19:10:281
18457997712,63cyclictest20933-21kworker/1:121:55:291
1845799770,33cyclictest12403-21/usr/sbin/munin23:35:171
48572760,2sleep34862-21cpuspeed_turbos21:00:143
1845799710,29cyclictest9394-21seq00:35:561
1845799710,29cyclictest27291-21seq19:28:081
1845799670,29cyclictest13918-21taskset22:28:341
134491670,4ptp4l11984-21diskstats20:05:162
267722660,6sleep21845899cyclictest21:45:252
1845799661,24cyclictest20768-21/usr/sbin/munin19:15:251
1845799660,30cyclictest20949-21taskset22:44:191
1845799660,28cyclictest31734-21taskset19:36:171
271382650,6sleep10-21swapper/120:35:271
1845799650,27cyclictest4436-21runrttasks23:15:571
1845799640,29cyclictest27227-21taskset21:46:101
1845799640,29cyclictest2224-21seq23:12:401
1845799640,29cyclictest18026-21seq20:15:461
1845799640,29cyclictest1746-21seq20:50:441
1845799640,23cyclictest22716-21mailstats23:55:251
134491640,4ptp4l0-21swapper/220:10:242
1845799630,28cyclictest18282-21seq21:29:311
1845799620,29cyclictest4583-21seq22:09:421
1845799620,25cyclictest19083-21hwlatdetect20:20:161
1845799610,28cyclictest16111-21seq22:31:401
1845799610,26cyclictest6650-21chrt22:11:511
134491600,4ptp4l0-21swapper/100:30:181
134491600,4ptp4l0-21swapper/021:38:420
1845799590,28cyclictest4209-21chrt19:48:511
1845799590,27cyclictest23691-21taskset00:00:011
1845799590,26cyclictest13385-21chrt21:16:441
134491590,3ptp4l0-21swapper/221:57:102
85892580,5sleep00-21swapper/023:25:240
134491580,3ptp4l0-21swapper/222:15:282
1845799572,23cyclictest0-21swapper/100:22:091
134491570,4ptp4l0-21swapper/219:20:142
1845799560,34cyclictest15867-21runrttasks21:23:011
1845799560,34cyclictest15867-21runrttasks21:23:011
134491560,4ptp4l0-21swapper/220:46:572
134491560,3ptp4l0-21swapper/223:10:252
134491540,4ptp4l0-21swapper/319:05:123
134491540,2ptp4l9-21ksoftirqd/020:19:180
134491540,14ptp4l0-21swapper/220:25:102
1845799530,25cyclictest20996-21awk20:25:141
134491530,9ptp4l0-21swapper/322:11:523
134491530,5ptp4l0-21swapper/119:09:071
134491530,4ptp4l1898-21chrt22:00:292
134491530,4ptp4l0-21swapper/319:27:573
134491530,4ptp4l0-21swapper/222:25:052
134491530,4ptp4l0-21swapper/219:38:262
134491530,3ptp4l0-21swapper/322:01:553
134491530,3ptp4l0-21swapper/221:17:562
134491530,3ptp4l0-21swapper/121:03:461
134491530,12ptp4l0-21swapper/219:51:152
134491520,4ptp4l0-21swapper/323:54:403
134491520,4ptp4l0-21swapper/323:43:293
134491520,4ptp4l0-21swapper/323:33:243
134491520,4ptp4l0-21swapper/322:51:333
134491520,4ptp4l0-21swapper/221:42:442
134491520,4ptp4l0-21swapper/020:35:000
134491520,3ptp4l0-21swapper/319:57:013
1845799512,47cyclictest0-21swapper/119:30:481
1845799510,17cyclictest137891phc2sys22:01:161
1845699516,7cyclictest0-21swapper/000:10:150
1845699515,7cyclictest31310-21kernelversion23:05:180
134491510,4ptp4l0-21swapper/323:45:493
134491510,4ptp4l0-21swapper/319:46:013
134491510,4ptp4l0-21swapper/223:45:472
134491510,10ptp4l2390-21apt-get20:55:132
1845799503,25cyclictest0-21swapper/121:42:591
134491500,4ptp4l31409-21meminfo23:05:192
134491500,4ptp4l0-21swapper/222:21:002
134491500,3ptp4l0-21swapper/320:39:343
134491500,3ptp4l0-21swapper/300:19:583
134491500,19ptp4l0-21swapper/321:22:283
134491500,19ptp4l0-21swapper/321:22:283
1845799491,46cyclictest20933-21kworker/1:121:14:101
1845799490,27cyclictest212-21systemd-journal00:06:441
1845699494,7cyclictest0-21swapper/023:50:260
134491490,5ptp4l0-21swapper/019:06:270
134491490,3ptp4l0-21swapper/322:30:213
134491480,4ptp4l0-21swapper/322:23:403
134491480,3ptp4l0-21swapper/320:01:273
1845699474,6cyclictest0-21swapper/019:55:240
134491470,6ptp4l0-21swapper/000:25:120
134491470,5ptp4l1845799cyclictest00:25:191
134491470,4ptp4l0-21swapper/323:13:103
134491470,4ptp4l0-21swapper/222:48:232
134491470,4ptp4l0-21swapper/219:40:562
134491470,3ptp4l0-21swapper/221:13:502
134491470,2ptp4l0-21swapper/319:12:553
1845699464,7cyclictest0-21swapper/022:40:260
134491460,3ptp4l0-21swapper/300:05:553
134491460,3ptp4l0-21swapper/120:02:141
134491460,3ptp4l0-21swapper/022:05:010
1845799451,22cyclictest18578-21apt-get21:30:121
1845799450,25cyclictest31952-21seq20:47:031
1845799450,13cyclictest137891phc2sys21:54:081
1845699456,5cyclictest9-21ksoftirqd/021:45:270
134491450,4ptp4l27691-21apt-get19:30:112
134491450,4ptp4l0-21swapper/322:48:583
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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