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2023-05-31 - 06:56

x86 Intel Xeon E3-1220 @3100 MHz, Linux 4.19.1-rt3 (Profile)

Latency plot of system in rack #2, slot #0
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 rack2slot0.osadl.org (updated Wed May 31, 2023 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3872550,0sleep30-21swapper/323:47:113
71112540,0sleep0111rcuc/023:16:010
297172540,0sleep00-21swapper/022:32:590
305752530,0sleep20-21swapper/222:00:332
194762510,0sleep10-21swapper/123:51:581
280622500,0sleep20-21swapper/221:27:332
249502480,0sleep10-21swapper/122:40:011
229532470,0sleep00-21swapper/021:34:320
248932440,0sleep20-21swapper/223:45:182
21522380,1sleep2619-21systemd-logind00:28:282
456823626,6sleep10-21swapper/119:08:461
287623514,6sleep20-21swapper/219:05:102
434523111,6sleep30-21swapper/319:06:033
448822918,7sleep00-21swapper/019:07:460
4769992120,0cyclictest19176-21lspci00:08:180
4769992120,0cyclictest19176-21lspci00:08:180
4769991716,0cyclictest21443-21kworker/0:321:56:570
305292170,0sleep30-21swapper/321:20:123
249672170,0sleep10-21swapper/100:25:501
50582160,0sleep05061-21bash23:07:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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