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2025-09-18 - 14:25
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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 Thu Sep 18, 2025 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
62079911842,70cyclictest12681-21kworker/u18:1+events_unbound21:06:220
62079911842,70cyclictest12681-21kworker/u18:1+events_unbound21:06:220
6207991183,103cyclictest0-21swapper/022:31:360
62079911735,55cyclictest0-21swapper/019:06:380
62079911145,59cyclictest21418-21latency_hist21:16:280
6207991103,70cyclictest6286-21awk23:36:550
62079910847,54cyclictest0-21swapper/020:11:580
3025421080,8sleep06198-21cyclictest00:21:460
6207991052,74cyclictest0-21swapper/023:55:130
62079910442,56cyclictest24818-21ls00:11:400
6207991043,91cyclictest23504-21ssh22:16:340
6207991034,84cyclictest6081-21latency_hist19:01:260
62079910225,55cyclictest0-21swapper/021:26:400
6207991014,87cyclictest16275-21ntpq21:06:530
62079910038,55cyclictest0-21swapper/022:51:590
6207991002,90cyclictest16888-21/usr/sbin/munin23:56:350
6207991002,90cyclictest16888-21/usr/sbin/munin23:56:350
620799993,64cyclictest14674-21sh22:01:340
52252997,63sleep25255-21ntpq18:56:582
6207999842,49cyclictest12149-21sendmail_mailqu23:46:560
620799983,83cyclictest26396-21apt-get22:21:340
620799983,83cyclictest26396-21apt-get22:21:340
6218999781,9cyclictest11267-21kworker/u17:2+ext4-rsv-conversion20:16:382
6218999781,9cyclictest11267-21kworker/u17:2+ext4-rsv-conversion20:16:382
620799976,57cyclictest0-21swapper/022:46:530
620799976,57cyclictest0-21swapper/022:46:530
6207999640,46cyclictest16549-21cpu19:31:390
620799963,60cyclictest331-21dbus-daemon19:41:220
620799963,60cyclictest331-21dbus-daemon19:41:220
620799962,63cyclictest22622-21sh00:06:550
620799962,63cyclictest22622-21sh00:06:550
6214999567,21cyclictest8410-21latency_hist23:41:241
6214999564,22cyclictest19523-21kworker/u19:2+rpciod21:07:091
620799953,84cyclictest11462-21sh21:56:220
620799953,82cyclictest485-21runrttasks20:21:370
620799953,79cyclictest0-21swapper/021:56:390
620799953,79cyclictest0-21swapper/021:56:390
6207999532,58cyclictest0-21swapper/022:11:500
620799952,61cyclictest2978-21fschecks_count23:31:450
620799945,62cyclictest19592-21cat21:12:350
6207999440,47cyclictest0-21swapper/019:01:590
620799943,63cyclictest17634-21taskset22:06:340
620799943,63cyclictest17634-21taskset22:06:340
620799942,59cyclictest30830-21seq22:28:160
620799942,59cyclictest30830-21seq22:28:160
6218999373,10cyclictest14151-21kworker/u17:3-xprtiod23:56:252
621899933,68cyclictest26422-21ssh23:16:412
620799933,78cyclictest20320-21apt-get23:06:370
6207999333,53cyclictest0-21swapper/020:51:500
620799932,61cyclictest19739-21/usr/sbin/munin19:41:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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