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2026-08-02 - 06:56
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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 Sun Aug 02, 2026 00:44:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2350524590,42sleep30-21swapper/318:52:003
2350524590,42sleep30-21swapper/318:52:003
248409912885,36cyclictest31761-21diskmemload21:31:252
23411212110,78sleep023371-21apt-get18:51:250
23411212110,78sleep023371-21apt-get18:51:250
2379321138,76sleep223798-21uname18:52:132
2379321138,76sleep223798-21uname18:52:132
248409911259,45cyclictest31378-21kworker/u17:2-xprtiod23:56:212
248409911259,45cyclictest31378-21kworker/u17:2-xprtiod23:56:212
248409911140,13cyclictest0-21swapper/200:25:502
248409911140,13cyclictest0-21swapper/200:25:502
248409910760,40cyclictest5506-21unixbench_singl19:31:232
248409910760,40cyclictest5506-21unixbench_singl19:31:232
248379910726,34cyclictest0-21swapper/019:30:580
248379910726,34cyclictest0-21swapper/019:30:580
248389910528,34cyclictest0-21swapper/121:51:001
23377210110,62sleep123371-21apt-get18:51:011
23377210110,62sleep123371-21apt-get18:51:011
2484099995,35cyclictest11859-21/usr/sbin/munin21:16:092
2484099995,35cyclictest11859-21/usr/sbin/munin21:16:092
24840999936,11cyclictest0-21swapper/222:26:232
2484099993,40cyclictest10587-21fschecks_count22:07:152
2484099993,40cyclictest10587-21fschecks_count22:07:152
24840999930,17cyclictest0-21swapper/219:51:092
24840999836,12cyclictest0-21swapper/221:45:582
24840999817,30cyclictest23167-21idleruntime00:16:102
2484099974,34cyclictest14300-21cpuspeed20:01:062
2484099974,34cyclictest14300-21cpuspeed20:01:062
24840999738,12cyclictest0-21swapper/221:05:472
2484099973,37cyclictest4716-21apt-config23:45:512
2484099973,32cyclictest1220-21cat19:20:502
2484099964,38cyclictest4014-21modprobe22:50:462
2484099954,42cyclictest2730-21sort21:00:512
2484099954,42cyclictest2730-21sort21:00:512
2484099954,34cyclictest8923-21timerwakeupswit23:51:292
24840999541,47cyclictest0-21swapper/221:51:112
24840999536,8cyclictest0-21swapper/200:15:492
24840999526,14cyclictest0-21swapper/219:21:032
2484099952,38cyclictest29045-21fschecks_time20:46:082
2484099952,38cyclictest29045-21fschecks_time20:46:082
24840999510,34cyclictest19682-21latency_hist00:10:492
2484099943,37cyclictest30773-21/usr/sbin/munin22:41:252
2484099934,38cyclictest7271-21/usr/sbin/munin22:56:222
2484099934,38cyclictest7271-21/usr/sbin/munin22:56:222
2484099934,29cyclictest12898-21/usr/sbin/munin22:11:082
2484099933,41cyclictest352-21runrttasks23:14:252
2484099933,41cyclictest19329-21wc22:21:152
24840999334,10cyclictest0-21swapper/200:04:442
24840999334,10cyclictest0-21swapper/200:04:442
24840999332,13cyclictest0-21swapper/221:26:122
2484099932,37cyclictest26879-21timerwakeupswit19:00:582
24838999366,21cyclictest7754-21latency_hist23:50:501
2484099924,36cyclictest352-21runrttasks19:49:542
2484099923,39cyclictest28325-21ssh23:31:052
2484099923,39cyclictest28325-21ssh23:31:052
2484099914,39cyclictest31849-21latency_hist19:15:502
2484099914,35cyclictest26898-21latency_hist20:40:502
2484099913,37cyclictest30698-21latency_hist22:40:502
2484099913,37cyclictest30698-21latency_hist22:40:502
2484099905,33cyclictest7752-21/usr/sbin/munin19:41:112
2484099904,34cyclictest26225-21unixbench_multi23:26:242
2484099903,43cyclictest22598-21fschecks_time20:26:112
2484099894,35cyclictest7665-21latency_hist19:40:492
2484099894,35cyclictest7665-21latency_hist19:40:492
2484099894,33cyclictest31623-21latency23:36:122
24838998927,25cyclictest22341-21seq20:26:031
2484099884,36cyclictest16069-21fschecks_count20:06:082
2484099884,35cyclictest24868-21latency_hist23:25:502
2484099884,34cyclictest19192-21cstates20:16:062
2484099883,38cyclictest28144-21timerandwakeup21:42:022
24837998821,29cyclictest2333-21/usr/sbin/munin22:46:240
24837998763,14cyclictest31883-21ssh23:36:190
2484099864,38cyclictest31933-21cat20:55:502
2484099864,34cyclictest23880-21/usr/sbin/munin21:36:142
2484099863,39cyclictest30172-21cat19:10:502
2484099863,33cyclictest17465-21/usr/sbin/munin20:11:032
2484099853,34cyclictest28504-21latency_hist20:45:492
2483799859,40cyclictest0-21swapper/021:56:310
2483799859,40cyclictest0-21swapper/021:56:310
2484099844,32cyclictest352-21runrttasks21:21:292
2484099844,29cyclictest3892-21cpu21:56:212
2484099844,29cyclictest3892-21cpu21:56:212
2484099842,37cyclictest5505-21cpu23:47:322
24838998425,29cyclictest803-21sendmail-mta21:41:061
24837998464,14cyclictest12937-21idleruntime-cro23:05:460
24837998464,14cyclictest12937-21idleruntime-cro23:05:460
24837998431,44cyclictest6167-21apt-get19:35:590
24837998431,44cyclictest6167-21apt-get19:35:590
24837998418,28cyclictest30529-21sort21:46:140
24838998361,16cyclictest2374-21systemd-journal00:23:351
24838998361,16cyclictest2374-21systemd-journal00:23:351
24837998362,15cyclictest30589-21sh22:40:490
24837998362,15cyclictest30589-21sh22:40:490
24837998358,15cyclictest23160-21timerwakeupswit20:26:240
24840998248,25cyclictest4280-21modprobe19:30:472
24837998218,24cyclictest16758-21sh23:11:120
2484099813,40cyclictest10646-21ssh23:01:122
2484099813,40cyclictest10646-21ssh23:01:122
24838998166,10cyclictest24822-21cyclictest21:10:261
2483799815,48cyclictest5225-21ssh23:46:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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