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2021-09-28 - 10:02

Intel(R) Core(TM) i5-6440EQ CPU @ 2.70GHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #5, slot #2
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 rack5slot2.osadl.org (updated Tue Sep 28, 2021 00:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
223242200185,11sleep10-21swapper/119:09:401
221372196180,11sleep00-21swapper/019:07:140
220432179161,14sleep20-21swapper/219:06:042
220592178161,12sleep30-21swapper/319:06:183
314232480,0sleep20-21swapper/221:35:202
155212470,0sleep00-21swapper/022:22:300
228072460,0sleep10-21swapper/121:11:421
74982440,0sleep20-21swapper/223:32:582
188992430,0sleep00-21swapper/021:46:480
314062410,0sleep10-21swapper/121:16:391
309492410,0sleep30-21swapper/323:09:223
83512290,0sleep20-21swapper/223:51:522
225339993,3cyclictest7717-21munin-run00:30:010
16282290,0sleep00-21swapper/020:00:150
225339982,3cyclictest12198-21munin-run21:25:020
225339970,3cyclictest28129-21munin-run19:20:000
20988270,0sleep320990-21latency_hist21:30:023
225449962,3cyclictest26279-21/usr/sbin/munin20:20:243
225449960,6cyclictest0-21swapper/300:05:173
225449960,5cyclictest25672-21apt-get23:25:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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