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2026-06-08 - 08:16
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackbslot7.osadl.org (updated Mon Jun 08, 2026 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
983021267,21sleep10-21swapper/118:55:171
10531991214,45cyclictest16313-21ssh23:39:440
10531991214,45cyclictest16313-21ssh23:39:440
105319910953,48cyclictest0-21swapper/021:59:350
105319910946,55cyclictest4476-21ssh23:19:470
105379910761,39cyclictest298-21in:imuxsock22:11:131
105379910761,39cyclictest298-21in:imuxsock22:11:131
105319910538,60cyclictest0-21swapper/000:09:310
10531991053,11cyclictest0-21swapper/018:59:360
10531991052,22cyclictest1978-21ssh00:09:540
10531991033,28cyclictest5715-21xargs00:15:070
105319910268,27cyclictest0-21swapper/021:59:560
105379910183,12cyclictest11098-21latency18:59:571
105319910166,25cyclictest0-21swapper/023:15:060
1053199995,37cyclictest21222-21fschecks_count21:04:540
1053199995,37cyclictest21222-21fschecks_count21:04:540
1053199994,24cyclictest22820-21mailstats22:55:070
1053199993,32cyclictest17627-21seq19:19:480
1053199993,32cyclictest17627-21seq19:19:480
1053199993,30cyclictest352-21runrttasks23:10:260
1053199993,29cyclictest21071-21runrttasks22:52:390
1053199993,26cyclictest1-21systemd23:34:320
1053199992,24cyclictest27590-21ntp_states21:15:010
1053199992,24cyclictest27590-21ntp_states21:15:010
10537999851,39cyclictest0-21swapper/100:14:541
10531999883,9cyclictest27214-21latency_hist19:49:350
10531999860,29cyclictest0-21swapper/022:37:350
10531999860,29cyclictest0-21swapper/022:37:350
10531999844,47cyclictest32421-21ssh22:16:420
10531999844,47cyclictest32421-21ssh22:16:420
10531999843,49cyclictest7214-21timerwakeupswit20:25:090
10531999843,49cyclictest7214-21timerwakeupswit20:25:090
10537999751,41cyclictest0-21swapper/120:59:311
10531999745,46cyclictest9711-21ssh21:39:470
1053199974,31cyclictest17689-21diskmemload23:34:470
10531999734,56cyclictest0-21swapper/023:57:450
1053199972,43cyclictest4513-21latency_hist20:19:350
10537999650,39cyclictest0-21swapper/119:34:341
1053199965,27cyclictest18245-21fschecks_count20:59:540
1053199965,27cyclictest18245-21fschecks_count20:59:540
1053199963,27cyclictest8222-21diskmemload21:36:580
10531999632,55cyclictest0-21swapper/022:20:110
10531999632,55cyclictest0-21swapper/022:20:110
1053199962,22cyclictest13073-21/usr/sbin/munin20:45:120
1053199944,33cyclictest10259-21latency_hist23:29:350
1053199944,33cyclictest10259-21latency_hist23:29:350
10531999435,52cyclictest0-21swapper/021:27:480
1053199943,33cyclictest2908-21latency_hist20:14:340
1053199943,32cyclictest14886-21diskstats20:49:530
1053199943,32cyclictest14886-21diskstats20:49:530
1053199943,30cyclictest7069-21latency_hist22:29:350
1053199943,30cyclictest7069-21latency_hist22:29:350
1053199943,30cyclictest12749-21/usr/sbin/munin19:04:450
1053199943,28cyclictest9811-21latency_hist20:34:360
1053199942,38cyclictest17689-21diskmemload23:03:020
1053199942,38cyclictest17689-21diskmemload23:03:020
1053199942,32cyclictest31243-21unixbench_multi21:20:540
1053199942,32cyclictest10098-21diskstats20:36:070
10545999311,59cyclictest9688-21apt-get21:39:522
1053199934,83cyclictest0-21swapper/022:39:480
1053199934,82cyclictest10417-21modprobe00:24:310
1053199934,30cyclictest27393-21latency_hist22:09:330
1053199933,35cyclictest32331-21latency_hist20:04:360
1053199933,35cyclictest32331-21latency_hist20:04:360
1053199933,27cyclictest3755-21cut21:29:550
1053199933,27cyclictest21961-40mandb23:49:340
1053199933,27cyclictest21961-40mandb23:49:340
1053199933,27cyclictest21961-40mandb23:49:340
1053199933,27cyclictest16263-21grep19:14:550
1053199933,24cyclictest12888-21runrttasks20:44:340
10531999320,22cyclictest25016-21unixbench_multi21:10:100
1053199924,28cyclictest28308-21idleruntime23:04:540
1053199923,35cyclictest20841-21/usr/sbin/munin19:30:000
1053199923,34cyclictest22883-21ls23:50:410
1053199923,34cyclictest22883-21ls23:50:410
10531999224,61cyclictest0-21swapper/022:09:470
10531999224,61cyclictest0-21swapper/022:09:470
1053199922,34cyclictest10821-21grep00:24:480
1053199922,34cyclictest10821-21grep00:24:480
10537999151,34cyclictest15999-21sh21:49:581
1053199918,11cyclictest0-21swapper/022:44:500
1053199918,11cyclictest0-21swapper/022:44:500
1053199915,14cyclictest7229-21apt-get22:29:440
1053199913,32cyclictest17835-21chrt20:59:350
1053199913,28cyclictest20675-21latency_hist19:29:340
1053199912,21cyclictest29278-21/usr/sbin/munin00:00:110
10531999110,27cyclictest13179-21latency21:45:000
10531999110,27cyclictest13179-21latency21:45:000
10537999070,13cyclictest10418-21fschecks_count22:34:541
10537999070,13cyclictest10418-21fschecks_count22:34:541
10537999068,16cyclictest15747-21cron19:14:321
10537999051,32cyclictest0-21swapper/121:55:091
10537999048,37cyclictest0-21swapper/121:24:551
10537999047,35cyclictest0-21swapper/121:00:071
10537999047,35cyclictest0-21swapper/121:00:071
10537999047,34cyclictest0-21swapper/123:51:411
10537999047,34cyclictest0-21swapper/123:51:411
10537999043,40cyclictest17689-21diskmemload22:57:461
1053199907,12cyclictest0-21swapper/021:54:020
1053199903,34cyclictest14384-21/usr/sbin/munin19:09:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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