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2024-07-16 - 08:42
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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 rack1slot2.osadl.org (updated Tue Jul 16, 2024 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1696423827,0sleep10-21swapper/118:47:541
1710123728,0sleep30-21swapper/318:49:323
1690023626,0sleep20-21swapper/218:47:112
1711423524,0sleep00-21swapper/018:49:370
8315060,0irq/26-0000:00:9130-21crond21:34:422
4160,0ktimersoftd/02065-21md0_raid123:25:170
339960,0migration/39329-21sh22:49:523
29925060,0irq/32-eth0-rx-30642-21python23:55:263
29925060,0irq/32-eth0-rx-2972-21munin-run19:24:433
171929960,0cyclictest0-21swapper/121:13:351
171919965,0cyclictest11069-21ps21:35:080
149960,0migration/03470-21sh23:21:050
149960,0migration/02412-21taskset23:04:300
8315050,0irq/26-0000:00:7019-21sort23:44:432
8315050,0irq/26-0000:00:17238-21yum20:15:272
4150,0ktimersoftd/00-21swapper/021:23:360
35150,0ktimersoftd/30-21swapper/319:34:353
339950,0migration/39499-21fschecks_count00:04:583
339950,0migration/3630-21kthreadcore23:40:033
339950,0migration/35926-21munin-node20:30:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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