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2024-08-14 - 22:29
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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
Characteristics of the 20 highest latencies:
System rackfslot7.osadl.org (updated Wed Aug 14, 2024 12:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2498522997435,39cyclictest2492568-21kworker/u16:3+flush-8:007:12:134
2498519996425,19cyclictest2656214-21ldconfig11:50:221
249852299621,1cyclictest0-21swapper/407:50:164
249851999620,60cyclictest2573665-21kworker/u16:0+flush-8:010:04:581
2498519995920,20cyclictest2550950-21unixbench_singl08:40:211
2498519995737,19cyclictest2602867-21irqstats10:15:231
2498519995716,40cyclictest2626778-21cut11:00:021
2498519995618,19cyclictest2600363-21sed10:10:181
2498519995617,20cyclictest2536726-21threads08:15:221
2498526995516,38cyclictest924-21runrttasks08:28:187
2498519995536,19cyclictest2567602-21grep09:10:261
2498526995414,39cyclictest0-21swapper/708:35:027
2498526995414,39cyclictest0-21swapper/708:35:017
2498526995413,40cyclictest2634661-40mandb11:11:277
2498526995314,19cyclictest2571796-21diskstats09:20:147
2498522995314,39cyclictest0-21swapper/412:15:144
2498519995335,18cyclictest769-21mta-sts-daemon11:00:151
2498519995333,19cyclictest2662437-21/usr/sbin/munin12:00:261
2498519995314,39cyclictest0-21swapper/111:14:491
2498519995314,20cyclictest2678872-21sed12:30:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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