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2026-03-25 - 08:36
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Wed Mar 25, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7621991042,31cyclictest8407-21ssh21:47:001
7616991022,71cyclictest15-21ksoftirqd/022:09:510
76219910078,15cyclictest641-21latency_hist22:29:361
7616991003,69cyclictest11697-21apt-get19:14:490
7628999660,30cyclictest14738-21diskmemload00:08:212
65842967,62sleep16587-21/usr/sbin/munin19:00:081
7616999532,55cyclictest9311-21latency_hist21:49:370
7621999374,11cyclictest5169-21timerwakeupswit23:30:111
7621999374,11cyclictest5169-21timerwakeupswit23:30:111
762899924,32cyclictest15035-21/usr/sbin/munin21:05:022
762899923,32cyclictest8033-21tune2fs00:29:552
762899923,26cyclictest1402-21df23:24:522
7628999143,40cyclictest0-21swapper/219:40:092
762899913,36cyclictest13924-21wc19:20:062
762899913,35cyclictest9755-21cat20:49:362
762199913,72cyclictest9628-21apt-get20:50:021
7628999049,8cyclictest181rcu_preempt23:39:202
762899904,30cyclictest15573-21/usr/sbin/munin22:00:092
762899903,33cyclictest757-21sed22:29:372
7621999042,41cyclictest18937-21timerandwakeup19:35:081
312442900,3sleep20-21swapper/220:14:552
762899894,36cyclictest352-21runrttasks22:49:582
762899894,35cyclictest11904-21sh21:53:322
762899894,33cyclictest18838-40mandb23:54:372
762899893,34cyclictest27383-21/usr/sbin/munin22:20:072
762899893,33cyclictest13231-21latency_hist19:19:372
762899892,39cyclictest3838-21ls21:39:512
762899892,39cyclictest3838-21ls21:39:512
762899892,35cyclictest7441-21ls20:40:072
762899892,33cyclictest8617-21timerwakeupswit19:05:102
7621998966,15cyclictest10122-21fschecks_time22:44:581
7621998966,15cyclictest10122-21fschecks_time22:44:581
7628998875,8cyclictest0-21swapper/200:10:002
7628998875,8cyclictest0-21swapper/200:10:002
7628998875,8cyclictest0-21swapper/200:10:002
762899884,67cyclictest27245-21apt-get21:24:492
762899884,67cyclictest27245-21apt-get21:24:492
762899883,36cyclictest18473-21latency_hist22:59:352
762899883,36cyclictest18473-21latency_hist22:59:352
762899883,34cyclictest6785-21cstates21:44:512
7628998833,49cyclictest0-21swapper/223:14:592
7628998833,49cyclictest0-21swapper/223:14:592
7628998832,49cyclictest0-21swapper/223:09:502
7628998827,9cyclictest0-21swapper/200:24:422
7628998827,9cyclictest0-21swapper/200:24:422
7621998842,39cyclictest27886-21latency22:20:011
762199883,36cyclictest15355-21/usr/sbin/munin19:25:001
762199883,31cyclictest27409-21ssh21:25:121
762199883,31cyclictest27409-21ssh21:25:121
635728826,36sleep30-21swapper/319:00:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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