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2025-05-03 - 01:45
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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 rackfslot7.osadl.org (updated Fri May 02, 2025 12:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3920684998123,39cyclictest4089766-21ntp_states12:05:193
3920684997416,39cyclictest1088-21runrttasks10:37:193
3920684997311,61cyclictest0-21swapper/312:33:103
3920684997171,0cyclictest0-21swapper/311:14:333
3920685996042,18cyclictest0-21swapper/409:40:194
3920684996022,38cyclictest511ktimers/309:29:493
3920684995920,39cyclictest5150ktimers/308:45:593
3920684995919,40cyclictest4065552-21telnet11:25:163
3920684995820,20cyclictest778-21dbus-daemon11:45:173
3920684995819,2cyclictest873-21mta-sts-daemon07:34:123
3920684995819,19cyclictest5150ktimers/308:50:373
3920684995719,38cyclictest1088-21runrttasks07:16:213
3920684995719,19cyclictest4102082-21taskset12:27:553
3920684995718,19cyclictest5150ktimers/308:13:193
3920684995718,19cyclictest4082407-21cat11:55:013
3920684995618,19cyclictest3938394-21diskstats07:40:143
3920684995614,42cyclictest0-21swapper/309:03:073
392068499550,16cyclictest0-21swapper/312:24:243
392068499550,15cyclictest0-21swapper/311:45:013
3920684995414,4cyclictest0-21swapper/312:12:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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