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2026-07-30 - 00:55
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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 Wed Jul 29, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8991214812,91sleep09009-21latency_hist06:56:040
9080991183,77cyclictest22774-21apt-get07:36:502
9080991073,79cyclictest26743-21apt-get11:01:202
90779910340,9cyclictest0-21swapper/108:36:041
9077991003,70cyclictest3747-21apt-get11:16:171
9077999855,36cyclictest16968-21kworker/u17:3-rpciod11:56:341
9077999855,36cyclictest16968-21kworker/u17:3-rpciod11:56:341
9077999840,8cyclictest0-21swapper/107:56:231
908099975,68cyclictest4043-21cstates11:16:472
9080999755,35cyclictest28370-21latency_hist09:16:052
9080999755,35cyclictest28370-21latency_hist09:16:052
82952948,58sleep28346-21sed06:51:462
9077999241,13cyclictest4195-21unixbench_multi08:16:381
9080999153,31cyclictest352-21runrttasks09:06:392
9069999153,26cyclictest19711-21kworker/u18:1+flush-179:011:01:280
908099903,29cyclictest4819-21ssh12:11:342
908099902,26cyclictest14782-21tune2fs07:11:242
9080999018,30cyclictest7001-21fschecks_time11:21:242
9077999041,12cyclictest16837-21latency_hist09:51:041
9069998954,14cyclictest14549-21ssh11:33:390
908099884,27cyclictest29984-21/usr/sbin/munin11:06:402
908099883,35cyclictest20294-21unixbench_multi07:26:382
908099883,32cyclictest352-21runrttasks07:44:142
908099883,32cyclictest352-21runrttasks07:44:142
908099883,29cyclictest29551-21ssh10:11:282
908099883,29cyclictest29551-21ssh10:11:282
9077998839,14cyclictest15974-21diskmemload10:21:361
908099874,29cyclictest19689-21sh09:01:422
908099874,29cyclictest19689-21sh09:01:422
908099873,23cyclictest2348-21/usr/sbin/munin08:11:352
9069998758,23cyclictest297-21systemd-logind09:31:010
908099863,27cyclictest6751-21fschecks_count08:26:252
908099862,26cyclictest19579-21timerandwakeup11:41:382
9080998616,7cyclictest0-21swapper/209:34:042
9080998616,7cyclictest0-21swapper/209:34:042
908099853,39cyclictest3547-21fschecks_time08:16:242
908099853,38cyclictest12047-21awk07:01:382
9080998533,45cyclictest0-21swapper/211:36:402
908099853,30cyclictest15034-21ssh09:46:382
908099853,29cyclictest11308-21cat10:36:032
9080998517,27cyclictest4714-21sh09:30:572
9080998469,10cyclictest9061-21cyclictest11:56:192
9080998469,10cyclictest9061-21cyclictest11:56:192
9080998458,18cyclictest352-21runrttasks08:36:362
9080998458,18cyclictest352-21runrttasks08:36:362
9080998437,39cyclictest0-21swapper/207:31:182
908099843,40cyclictest8906-21find09:36:372
908099843,28cyclictest3487-21timerwakeupswit10:21:372
908099843,26cyclictest365-21/usr/sbin/munin08:06:242
908099843,26cyclictest365-21/usr/sbin/munin08:06:242
908099843,24cyclictest17872-21grep10:46:252
9080998430,47cyclictest0-21swapper/211:00:592
9080998430,47cyclictest0-21swapper/211:00:592
9080998430,46cyclictest0-21swapper/212:06:122
908099842,38cyclictest3489-21latency_hist11:16:042
892028413,42sleep18941-21munin-run06:56:011
9080998340,33cyclictest0-21swapper/210:06:322
908099833,39cyclictest10748-21ntp_states12:21:312
908099833,33cyclictest17353-21grep09:51:252
908099833,29cyclictest1059-21ls12:06:042
908099833,28cyclictest31372-21netstat08:01:282
908099833,28cyclictest31372-21netstat08:01:282
9080998325,48cyclictest0-21swapper/208:56:032
9080998325,48cyclictest0-21swapper/208:56:032
908099832,27cyclictest13155-21fschecks_time07:06:242
908099832,25cyclictest14909-21if_eth010:41:252
9077998364,14cyclictest29254-21latency_hist07:56:051
9069998352,24cyclictest8182-21ssh09:36:190
45182830,10sleep0211rcuc/011:16:590
908099823,31cyclictest25170-21ssh11:51:262
908099823,25cyclictest29505-21grep09:16:392
908099823,25cyclictest15401-21sh11:36:002
9080998232,43cyclictest0-21swapper/210:01:242
908099823,13cyclictest0-21swapper/211:48:402
908099823,13cyclictest0-21swapper/211:48:402
9080998229,45cyclictest0-21swapper/209:21:202
9080998229,45cyclictest0-21swapper/209:21:202
9080998229,44cyclictest0-21swapper/211:26:382
908099822,25cyclictest30070-21timerandwakeup07:56:362
9080998218,29cyclictest5757-21ssh10:26:222
9069998225,29cyclictest0-21swapper/012:10:050
908099813,29cyclictest352-21runrttasks07:24:372
908099813,26cyclictest21560-21unixbench_multi10:51:382
908099813,23cyclictest11780-21/usr/sbin/munin08:41:252
9080998125,48cyclictest0-21swapper/209:56:302
9080998124,47cyclictest0-21swapper/212:21:042
9080998124,47cyclictest0-21swapper/212:21:042
908099812,28cyclictest16401-21fschecks_time07:16:242
908099812,27cyclictest12535-21unixbench_multi10:36:382
908099812,27cyclictest12535-21unixbench_multi10:36:382
9069998144,26cyclictest18023-21fschecks_time07:21:240
906999813,49cyclictest26653-21latency_hist11:01:060
906999813,49cyclictest26653-21latency_hist11:01:060
908099803,31cyclictest32589-21ssh10:16:312
908099803,22cyclictest5058-21/usr/sbin/munin08:21:192
908099802,29cyclictest28620-21unixbench_multi07:51:392
908099802,28cyclictest13822-21runrttasks08:46:382
908099802,26cyclictest13915-21latency_hist09:46:042
908099802,26cyclictest13915-21latency_hist09:46:042
908099793,36cyclictest26181-21ls07:46:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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