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2023-06-01 - 14:25

x86 Intel Core i5-8265UE @1600 MHz, Linux 5.10.41-rt42 (Profile)

Latency plot of system in rack #a, slot #8
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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackaslot8.osadl.org (updated Thu Jun 01, 2023 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22552313287,16sleep20-21swapper/219:08:222
22872309276,21sleep10-21swapper/119:08:451
23832294263,19sleep00-21swapper/019:09:560
3742282248,21sleep30-21swapper/319:05:103
35382610,0sleep30-21swapper/322:55:593
269112600,0sleep00-21swapper/020:00:170
246702590,0sleep20-21swapper/222:23:592
201842590,0sleep10-21swapper/123:33:091
68762580,0sleep3331rcuc/300:13:393
41942580,0sleep00-21swapper/022:56:400
279232560,0sleep00-21swapper/022:50:180
170992530,1sleep20-21swapper/221:52:472
293462210,0sleep30-21swapper/321:12:463
234912150,0sleep20-21swapper/223:35:262
50862140,0sleep30-21swapper/323:21:223
60962120,0sleep20-21swapper/200:12:502
51222120,0sleep10-21swapper/120:25:011
252099129,2cyclictest34-21ksoftirqd/323:45:003
8562110,0sleep00-21swapper/000:08:560
2520991110,1cyclictest34-21ksoftirqd/323:50:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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