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2022-10-04 - 09:18

x86 Intel Core i7-3770K @3500 MHz, Linux 5.4.102-rt53 (Profile)

Latency plot of system in rack #c, 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
Characteristics of the 20 highest latencies:
System rackcslot6.osadl.org (updated Tue Oct 04, 2022 00:46:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2812132135117,2sleep10-21swapper/119:05:291
2811592135117,3sleep00-21swapper/019:05:280
282337999530,36cyclictest0-21swapper/019:21:440
28205729489,3sleep50-21swapper/519:08:385
28185329456,11sleep40-21swapper/419:05:484
28205229288,2sleep20-21swapper/219:08:352
282364998816,39cyclictest0-21swapper/319:36:443
282364998716,35cyclictest0-21swapper/322:06:443
282337998717,40cyclictest0-21swapper/022:56:440
282377998616,39cyclictest0-21swapper/521:46:445
282337998616,38cyclictest0-21swapper/020:46:440
282377998516,39cyclictest0-21swapper/519:46:445
282356998510,47cyclictest28-21ksoftirqd/220:31:442
282337998515,37cyclictest0-21swapper/022:41:440
282337998515,37cyclictest0-21swapper/020:21:440
282356998416,37cyclictest0-21swapper/221:11:442
282356998416,36cyclictest0-21swapper/222:21:442
282356998416,36cyclictest0-21swapper/219:56:442
282337998415,38cyclictest0-21swapper/021:56:440
282377998221,33cyclictest0-21swapper/521:31:445
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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