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2025-12-01 - 13:53
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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 Mon Dec 01, 2025 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
176939910867,34cyclictest17679-21cyclictest23:33:501
17688991074,49cyclictest26661-21timerandwakeup22:59:260
17688991074,49cyclictest26661-21timerandwakeup22:59:260
176939910364,31cyclictest3599-21diskmemload23:15:141
17688991033,31cyclictest30158-21unixbench_multi23:05:100
1683121037,66sleep116877-21mailstats19:04:331
17688991004,41cyclictest355-21runrttasks21:53:540
17688991003,32cyclictest11119-21cron23:28:470
17688991003,32cyclictest11119-21cron23:28:470
17697999979,12cyclictest16750-21latency_hist21:48:502
1768899993,33cyclictest17277-21/usr/sbin/munin23:39:050
1768899993,33cyclictest17277-21/usr/sbin/munin23:39:050
17693999769,18cyclictest19357-21apt-key20:48:511
1769399967,65cyclictest29171-21ssh23:04:461
17688999638,19cyclictest4147-21kworker/u17:0+nfsiod22:47:490
17688999538,19cyclictest28948-21kworker/u17:3+nfsiod23:36:230
1752629412,51sleep017558-21awk19:08:480
17688999337,19cyclictest28948-21kworker/u17:3+nfsiod23:59:410
17693999251,34cyclictest31574-21apt-get22:14:051
1769799913,33cyclictest32271-21/usr/sbin/munin22:14:232
1768899914,36cyclictest25414-21latency_hist22:03:510
1768899914,36cyclictest25414-21latency_hist22:03:510
1768899913,38cyclictest355-21runrttasks23:33:050
17697998955,27cyclictest24617-21kworker/u17:2-ext4-rsv-conversion22:23:482
17697998941,41cyclictest0-21swapper/222:08:502
17697998920,29cyclictest25661-21cat22:03:522
1769799883,32cyclictest1073-21/usr/sbin/munin19:54:192
17693998854,27cyclictest0-21swapper/122:59:231
17693998854,27cyclictest0-21swapper/122:59:231
17697998766,16cyclictest17679-21cyclictest23:15:032
1769799873,30cyclictest2429-21/usr/sbin/munin21:24:212
17693998749,32cyclictest25801-21diskmemload22:49:011
17693998743,38cyclictest8052-21ntp_kernel_pll_20:14:171
17693998738,39cyclictest0-21swapper/121:03:511
17697998635,44cyclictest0-21swapper/222:30:002
17697998635,44cyclictest0-21swapper/222:30:002
1769799863,29cyclictest32554-21ntpq21:19:152
17697998623,9cyclictest0-21swapper/221:03:492
17697998622,8cyclictest0-21swapper/221:18:062
1769399866,61cyclictest23125-21ssh22:54:521
1769399866,61cyclictest23125-21ssh22:54:521
17693998644,35cyclictest0-21swapper/120:09:181
17693998626,42cyclictest0-21swapper/121:08:491
17697998534,43cyclictest30022-21unixbench_multi23:59:252
1769799853,31cyclictest22697-21ls20:58:502
1769399853,27cyclictest10686-21idleruntime-cro22:33:481
1769399853,27cyclictest10686-21idleruntime-cro22:33:481
1769799849,12cyclictest0-21swapper/223:32:112
1769799843,31cyclictest20052-21sshd19:14:082
1769799843,31cyclictest20052-21sshd19:14:082
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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