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2026-06-09 - 15:20
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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 50 highest latencies:
System rackdslot1.osadl.org (updated Tue Jun 09, 2026 12:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41032700,3sleep24107-21cpuspeed_turbos11:20:142
134491650,5ptp4l0-21swapper/109:25:171
202002640,4sleep220204-21fschecks_time09:35:162
134491640,5ptp4l0-21swapper/112:00:211
134491600,4ptp4l0-21swapper/109:00:251
1650999599,22cyclictest27319-21unixbench_multi07:30:272
134491590,4ptp4l0-21swapper/107:30:271
1650999582,21cyclictest0-21swapper/211:25:292
134491580,4ptp4l0-21swapper/108:00:291
134491580,4ptp4l0-21swapper/107:41:211
134491580,3ptp4l0-21swapper/311:40:143
134491580,3ptp4l0-21swapper/311:40:133
134491580,3ptp4l0-21swapper/007:15:260
134491570,5ptp4l1650799cyclictest11:45:000
134491570,5ptp4l1650799cyclictest11:45:000
1650999561,2cyclictest16504-21ls11:45:222
134491560,4ptp4l0-21swapper/107:54:141
134491560,3ptp4l0-21swapper/009:40:260
134691550,4getstats0-21swapper/309:30:053
134491550,4ptp4l0-21swapper/109:53:551
134491550,4ptp4l0-21swapper/109:06:231
134491550,3ptp4l0-21swapper/112:23:391
134491550,3ptp4l0-21swapper/011:16:240
134691540,13getstats0-21swapper/110:35:351
134491540,4ptp4l0-21swapper/111:59:071
134491540,4ptp4l0-21swapper/110:10:511
134491540,4ptp4l0-21swapper/110:07:021
134491540,3ptp4l0-21swapper/110:25:041
134491540,3ptp4l0-21swapper/007:39:430
134491530,4ptp4l0-21swapper/111:48:131
134491530,4ptp4l0-21swapper/111:33:591
134491520,4ptp4l0-21swapper/109:17:131
1650999511,21cyclictest134691getstats07:50:122
134491510,4ptp4l0-21swapper/110:46:021
134491510,4ptp4l0-21swapper/110:03:171
134491510,3ptp4l0-21swapper/112:15:231
134491510,3ptp4l0-21swapper/111:24:431
134491510,3ptp4l0-21swapper/108:51:581
134491510,10ptp4l0-21swapper/110:56:471
134491500,7ptp4l14121-21apt-get07:05:123
134491500,4ptp4l0-21swapper/111:10:451
134491500,4ptp4l0-21swapper/109:43:291
134491500,4ptp4l0-21swapper/108:43:591
134491490,4ptp4l0-21swapper/110:51:111
134491490,4ptp4l0-21swapper/108:38:411
134491490,4ptp4l0-21swapper/107:46:411
1650999482,3cyclictest0-21swapper/208:54:352
1650999470,3cyclictest22408-21diskstats09:40:162
134691470,12getstats26965-21latency_hist12:10:001
134491470,6ptp4l0-21swapper/207:05:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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