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2026-05-21 - 04:21
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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 May 21, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1479121358,93sleep114881-21unixbench_singl18:56:281
1479121358,93sleep114881-21unixbench_singl18:56:281
153919910889,13cyclictest20973-21latency_hist19:15:472
153859910511,79cyclictest15876-21apt-get22:36:030
15391999662,30cyclictest15372-21cyclictest22:10:232
15391999662,30cyclictest15372-21cyclictest22:10:232
15391999551,35cyclictest0-21swapper/221:51:192
15391999452,35cyclictest2374-21systemd-journal19:04:372
15389999458,30cyclictest1-21systemd21:50:461
1538999942,42cyclictest22262-21sh23:40:561
1538999942,42cyclictest22262-21sh23:40:561
1522429414,55sleep215261-21idleruntime-cro19:00:452
1522429414,55sleep215261-21idleruntime-cro19:00:452
1539199932,62cyclictest19426-21sh00:30:442
15389999370,15cyclictest13716-21kworker/u19:0-rpciod00:25:481
1538999933,43cyclictest10287-21/usr/sbin/munin22:26:171
1538999933,43cyclictest10287-21/usr/sbin/munin22:26:171
15391999270,16cyclictest9521-21sh21:31:072
15389999251,35cyclictest29125-21latency_hist19:40:491
15391999149,36cyclictest22549-21fschecks_time23:41:082
15391999149,36cyclictest22549-21fschecks_time23:41:082
15391999147,38cyclictest277-21dbus-daemon20:25:462
1539199914,49cyclictest29483-21apt21:10:452
1539199914,49cyclictest29483-21apt21:10:452
15389999149,35cyclictest0-21swapper/120:01:101
15385999061,19cyclictest18592-21latency_hist20:45:470
1539199893,38cyclictest32612-21grep21:15:472
15389998960,19cyclictest9169-21kworker/u18:3+nfsiod00:16:011
1538999892,28cyclictest23499-21diskmemload00:29:211
1539199883,40cyclictest22169-21latency_hist23:40:482
15389998864,14cyclictest24198-21kworker/u17:0-xprtiod23:46:021
15389998864,14cyclictest24198-21kworker/u17:0-xprtiod23:46:021
1538999883,40cyclictest19084-21fschecks_time22:41:061
15385998858,20cyclictest22079-21sh23:40:480
15385998819,43cyclictest0-21swapper/023:16:040
1539199876,33cyclictest8244-21unixbench_singl23:16:222
1539199875,36cyclictest25877-21modprobe19:30:452
1539199874,40cyclictest352-21runrttasks19:08:372
1539199874,40cyclictest352-21runrttasks19:08:372
1539199874,36cyclictest15226-21/usr/sbin/munin21:41:142
1539199873,40cyclictest17119-21/usr/sbin/munin22:36:502
1539199873,39cyclictest27526-21apt-key22:55:472
1539199873,39cyclictest27526-21apt-key22:55:472
1539199873,38cyclictest12700-21mailstats20:27:112
15389998767,14cyclictest2142-21threads23:06:221
15389998750,31cyclictest23499-21diskmemload22:31:191
15389998748,33cyclictest28608-21sh21:08:211
15389998748,33cyclictest28608-21sh21:08:211
1538999873,42cyclictest9334-21/usr/sbin/munin21:31:011
1539199864,41cyclictest13505-21latency_hist00:20:472
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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