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2025-04-21 - 10:59
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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 20 highest latencies:
System rackeslot8.osadl.org (updated Mon Apr 21, 2025 00:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
221315421040,1sleep30-21swapper/323:00:263
20109912940,1sleep30-21swapper/320:30:273
19688102400,1chrt1-21systemd20:00:012
21136482370,1sleep20-21swapper/221:50:142
22698722310,1sleep20-21swapper/223:44:422
1905447992623,2cyclictest0-21swapper/220:50:002
1905447992520,3cyclictest3561480-21systemd-journal20:20:012
1905446992523,1cyclictest2308836-21cut00:15:001
1905443992522,2cyclictest2325554-21munin-run00:25:000
23305162240,1chrt0-21swapper/300:30:123
1905447992320,2cyclictest1-21systemd23:39:592
1905447992219,2cyclictest3561480-21systemd-journal00:10:012
1905446992218,3cyclictest524-21rs:main1
1905446992216,4cyclictest2205099-21grep22:55:261
1905443992219,2cyclictest1-21systemd20:55:010
1905443992218,3cyclictest0-21swapper/019:15:010
1905447992117,3cyclictest2317024-21sendmail00:20:012
1905447992117,3cyclictest2017693-21latency_hist20:40:012
1905446992118,2cyclictest2344889-21systemd00:40:001
1905446992118,2cyclictest0-21swapper/121:54:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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