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2025-09-16 - 10:36
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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 rackeslot8.osadl.org (updated Mon Sep 15, 2025 12:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8618562350,1chrt861857-21ssh11:14:001
8535222330,1sleep00-21swapper/011:08:200
6281812280,1chrt628184-21cut08:40:191
509935992623,1cyclictest0-21swapper/310:25:003
509924992620,4cyclictest789823-21systemd-run10:30:000
509935992421,1cyclictest0-21swapper/308:05:203
50992899241,15cyclictest838160-21munin-plugin-st11:00:001
509924992418,4cyclictest666721-21unixbench-2d09:10:270
509935992320,1cyclictest0-21swapper/312:40:003
50993599230,1cyclictest838155-21turbostat11:00:003
509928992317,4cyclictest954927-21grep12:20:251
509928992314,8cyclictest0-21swapper/111:55:241
509928992312,10cyclictest969272-21kernelversion12:35:171
509924992319,2cyclictest0-21swapper/012:40:000
50993599227,4cyclictest693407-21taskset09:30:123
509935992211,8cyclictest0-21swapper/310:30:013
509935992210,1cyclictest0-21swapper/311:00:273
509932992220,1cyclictest668858-21munin-run09:15:012
509932992219,2cyclictest789831-21systemd-run10:30:012
509928992215,6cyclictest635717-21cron08:50:011
509928992213,8cyclictest548062-21ntpq07:35:221
509928992211,9cyclictest914000-21sed11:45:181
509928992211,3cyclictest1-21systemd09:06:231
509928992211,2cyclictest813980-21/usr/sbin/munin10:45:011
50993599219,1cyclictest0-21swapper/309:35:173
509935992118,1cyclictest0-21swapper/311:45:003
509935992112,7cyclictest0-21swapper/312:06:173
509935992111,1cyclictest0-21swapper/311:39:333
509935992111,1cyclictest0-21swapper/309:30:003
509935992110,1cyclictest0-21swapper/311:45:243
509935992110,1cyclictest0-21swapper/309:40:013
509935992110,1cyclictest0-21swapper/309:00:193
509935992110,1cyclictest0-21swapper/308:55:253
509935992110,1cyclictest0-21swapper/307:45:013
509928992113,6cyclictest0-21swapper/108:25:171
509928992112,8cyclictest723183-21timerandwakeup09:45:241
509928992111,9cyclictest790628-21irqcore10:30:161
509924992118,2cyclictest955424-21latency_hist12:25:010
509924992114,6cyclictest750-21sshd09:45:570
509924992112,8cyclictest0-21swapper/010:00:010
509935992017,1cyclictest0-21swapper/311:54:593
509935992017,1cyclictest0-21swapper/311:10:153
509935992017,1cyclictest0-21swapper/310:45:173
509935992011,7cyclictest0-21swapper/310:15:243
509935992010,1cyclictest0-21swapper/310:07:553
509932992016,2cyclictest924689-21irqcore11:55:172
50992899209,2cyclictest746980-21sshd10:00:231
50992899209,2cyclictest0-21swapper/112:10:171
50992899208,4cyclictest3818356-21systemd-journal08:35:001
50992899206,5cyclictest749956-21seq10:05:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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