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2025-09-04 - 07:01
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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 rackaslot8.osadl.org (updated Thu Sep 04, 2025 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
183132270237,21sleep10-21swapper/119:07:551
183872267235,20sleep00-21swapper/019:08:510
183102262229,20sleep30-21swapper/319:07:533
181792259226,21sleep20-21swapper/219:06:112
180842630,0sleep30-21swapper/321:15:333
227512580,0sleep30-21swapper/323:20:153
115312550,0sleep10-21swapper/122:23:361
151912540,0sleep20-21swapper/222:02:102
269002190,0sleep20-21swapper/219:25:142
60592150,0sleep30-21swapper/323:07:473
18585991512,2cyclictest22-21ksoftirqd/100:00:001
1858599110,1cyclictest19739-21turbostat00:35:011
185939996,2cyclictest34-21ksoftirqd/321:10:003
185939994,3cyclictest19982-21systemd-journal21:02:173
185899994,3cyclictest19982-21systemd-journal20:20:082
185859997,1cyclictest22-21ksoftirqd/100:40:001
185859994,3cyclictest19982-21systemd-journal00:07:051
185859993,3cyclictest26397-21munin-run22:35:021
185809990,8cyclictest12713-21ssh21:12:060
7224280,0sleep00-21swapper/023:33:110
32565280,0sleep20-21swapper/221:26:472
185939985,2cyclictest11736-21in:imuxsock00:00:013
185939984,3cyclictest508-21dbus-daemon23:40:013
185939984,2cyclictest10450-40rsyslog-rotate00:00:013
185939983,3cyclictest19982-21systemd-journal00:11:163
185939982,4cyclictest19982-21systemd-journal21:35:143
185939980,7cyclictest13279-21users22:00:193
185939980,6cyclictest19982-21systemd-journal22:55:213
185899984,3cyclictest19982-21systemd-journal21:43:112
185899983,4cyclictest19982-21systemd-journal22:56:302
185899983,1cyclictest0-21swapper/221:35:162
185859984,3cyclictest19982-21systemd-journal22:11:331
185859984,3cyclictest19982-21systemd-journal21:22:431
185859983,3cyclictest19982-21systemd-journal22:35:191
185859981,2cyclictest6808-21sshd19:50:551
185859980,1cyclictest141rcu_preempt19:15:131
185809984,3cyclictest508-21dbus-daemon19:28:490
185809984,3cyclictest19982-21systemd-journal20:59:210
185939974,2cyclictest19982-21systemd-journal22:49:063
185939973,3cyclictest508-21dbus-daemon23:46:403
185939973,3cyclictest30654-21snmpd22:18:523
185939973,3cyclictest19982-21systemd-journal21:56:243
185939973,3cyclictest19982-21systemd-journal19:51:003
185939973,3cyclictest14616-21cut20:10:143
185939973,3cyclictest1-21systemd21:26:023
185939973,3cyclictest0-21swapper/323:18:283
185939973,3cyclictest0-21swapper/300:30:203
185939973,1cyclictest0-21swapper/322:35:053
185939972,3cyclictest7661-21lldpd23:42:433
185939972,3cyclictest7661-21lldpd19:49:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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