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2023-06-07 - 01:43

x86 Intel Core i7-2600K @3400 MHz, Linux 5.9.0-rc2-rt1 (Profile)

Latency plot of system in rack #4, slot #6
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 -h200 -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 rack4slot6.osadl.org (updated Tue Jun 06, 2023 12:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1402199538535,2cyclictest55-21ksoftirqd/707:10:007
1402199537534,2cyclictest55-21ksoftirqd/707:10:017
1347452990,95pltrace0-21swapper/307:09:573
1066552900,86pltrace0-21swapper/607:05:316
2420952780,1pltrace1401599cyclictest10:26:326
1363727862,12sleep10-21swapper/107:08:471
1371427761,12sleep00-21swapper/007:09:490
1368027762,11sleep50-21swapper/507:09:235
1366827761,12sleep20-21swapper/207:09:122
2281752710,0pltrace22822-21pltrace-run07:21:313
601952700,0pltrace0-21swapper/411:46:324
1292852690,0pltrace12929-21sed08:01:323
1344526843,12sleep40-21swapper/407:06:264
14011996563,1cyclictest43-21ksoftirqd/507:10:015
223652630,0sleep20-21swapper/210:59:202
1856252630,0pltrace0-21swapper/208:11:322
1856252630,0pltrace0-21swapper/208:11:322
223072620,0sleep10-21swapper/109:50:291
168932580,1sleep7541rcuc/709:45:227
634252510,0pltrace6347-21pltrace-run10:41:322
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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