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2026-04-19 - 12:49
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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 Apr 19, 2026 00:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2268997613,21cyclictest3324-21latency_hist23:50:003
2268997516,12cyclictest28295-21chrt22:23:173
2268997215,11cyclictest18025-21taskset19:42:023
2268997116,19cyclictest9342-21taskset20:32:023
2268997116,12cyclictest25748-21taskset21:07:233
2268997116,11cyclictest27641-21taskset20:04:283
2268997111,11cyclictest418-21cron21:25:003
2268997015,18cyclictest8910-21chrt19:23:483
2268997015,12cyclictest9657-21taskset22:52:003
2268996916,11cyclictest24273-21chrt00:34:473
2268996916,10cyclictest1324-21cut21:25:173
2268996816,19cyclictest2104-21taskset20:16:203
2268996816,11cyclictest9625-21taskset21:40:483
2268996816,11cyclictest26285-21taskset00:36:123
2268996815,18cyclictest10014-21taskset00:04:103
2268996815,11cyclictest30879-21taskset23:39:593
2268996815,11cyclictest25188-21taskset19:57:463
2268996814,11cyclictest11572-21taskset20:36:103
2268996716,16cyclictest28153-21taskset21:13:423
2268996716,12cyclictest4959-21taskset21:32:543
2268996716,12cyclictest19931-21taskset00:25:093
2268996715,10cyclictest25847-21taskset22:16:433
2268996714,12cyclictest5368-21chrt23:53:513
2268996615,17cyclictest5010-21taskset22:41:183
2268996614,10cyclictest22729-21taskset19:50:443
2268996611,12cyclictest14472-21awk00:10:273
226699665,17cyclictest15275-21grep19:35:261
2268996516,10cyclictest25857-21seq23:27:163
2268996516,10cyclictest25857-21seq23:27:163
2268996515,11cyclictest19501-21chrt00:22:363
2268996515,10cyclictest404-21chrt23:40:483
2268996515,10cyclictest23595-21taskset23:22:423
2268996514,11cyclictest23627-21chrt21:04:303
2268996414,15cyclictest4370-21sed20:20:263
2268996316,17cyclictest7534-21chrt23:57:163
2268996314,17cyclictest21245-21taskset23:17:163
2268996312,11cyclictest3715-21sed19:10:253
226699638,15cyclictest17456-21cut23:10:151
2266996311,11cyclictest11908-21chrt22:56:241
134491630,4ptp4l10218-21apt-get21:45:122
2268996210,10cyclictest28949-21hwlatdetect21:15:163
226699629,9cyclictest32034-21ps21:20:241
2266996211,10cyclictest19653-21df_abs23:15:131
134491620,5ptp4l0-21swapper/020:00:210
2268996115,15cyclictest11431-21processes21:45:253
2268996115,11cyclictest13349-21taskset19:31:553
134491610,4ptp4l0-21swapper/121:45:221
226699604,11cyclictest27154-21cut22:20:191
2266996010,14cyclictest12422-21taskset00:08:091
134491600,6ptp4l2252-21cpufreq19:10:020
134491600,4ptp4l0-21swapper/223:21:462
2268995918,11cyclictest32394-21taskset20:13:493
2268995912,16cyclictest13100-21cut20:40:183
226699598,17cyclictest14602-21cat23:04:591
226699596,16cyclictest0-21swapper/119:40:141
134491590,6ptp4l0-21swapper/019:09:200
134491590,4ptp4l0-21swapper/022:17:380
134491590,3ptp4l30964-21/usr/sbin/munin22:30:190
2268995818,17cyclictest20468-21taskset19:48:503
2268995817,15cyclictest18910-21runrttasks23:11:513
2268995815,40cyclictest13460-21memory21:50:203
226699589,17cyclictest29270-21grep20:05:261
226699588,9cyclictest9334-21mailstats00:00:251
226699586,10cyclictest134491ptp4l22:30:151
2266995810,15cyclictest2674-21sed23:45:251
2266995810,14cyclictest21552-21sed00:25:301
2268995717,11cyclictest6594-21taskset19:18:493
2268995717,11cyclictest12235-21taskset00:05:453
226699576,11cyclictest6381-21cut22:45:191
226699575,12cyclictest19727-21fschecks_time20:55:171
2266995710,14cyclictest9228-21chrt20:30:341
2266995710,11cyclictest9655-21taskset22:51:591
134491570,5ptp4l0-21swapper/000:30:560
134491570,4ptp4l0-21swapper/020:33:350
134491570,15ptp4l32414-21/usr/sbin/munin19:05:133
2268995618,6cyclictest13582-21ntp_states23:00:233
2268995617,18cyclictest7531-21taskset21:38:353
2268995615,9cyclictest7037-21runrttasks20:26:563
226699568,9cyclictest26031-21sed00:35:261
226699567,10cyclictest20876-21sed22:05:271
2266995610,11cyclictest28031-21chrt21:12:141
2266995610,10cyclictest4301-21taskset19:13:551
134491560,4ptp4l0-21swapper/023:48:340
134491560,4ptp4l0-21swapper/019:58:080
2268995517,11cyclictest2878-21taskset22:38:363
2268995517,11cyclictest21400-21taskset22:08:273
226899551,13cyclictest0-21swapper/322:59:593
226699558,8cyclictest0-21swapper/119:15:161
226699558,11cyclictest15081-21perl20:45:151
226699556,10cyclictest30181-21date22:25:271
226699555,10cyclictest22234-21/usr/sbin/munin00:30:241
134491550,4ptp4l0-21swapper/200:25:352
134491550,4ptp4l0-21swapper/022:59:560
134491550,11ptp4l1243-21python19:05:251
2268995417,20cyclictest18881-21taskset20:52:493
2268995415,9cyclictest28288-21taskset23:31:173
2268995415,11cyclictest1317-21runrttasks20:09:593
2268995411,14cyclictest21297-21runrttasks20:59:203
134491540,4ptp4l0-21swapper/023:41:020
134491540,4ptp4l0-21swapper/021:46:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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