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2023-02-06 - 13:07

x86 Intel Celeron G1620 @2700 MHz, Linux 5.10.35-rt39 (Profile)

Latency plot of system in rack #8, slot #7
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: ondemand
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack8slot7.osadl.org (updated Mon Feb 06, 2023 00:43:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2877099230,0cyclictest0-21swapper/123:00:151
2877099200,20cyclictest0-21swapper/121:18:321
28770991616,0cyclictest0-21swapper/121:56:221
28770991515,0cyclictest0-21swapper/123:45:451
2877099150,14cyclictest0-21swapper/119:20:241
28769991515,0cyclictest0-21swapper/000:30:110
2876999150,15cyclictest0-21swapper/023:57:160
2876999150,15cyclictest0-21swapper/021:11:560
2876999150,0cyclictest0-21swapper/000:21:480
2877099146,2cyclictest4821-21python22:25:251
2877099141,5cyclictest19468-21x2gosqlitewrapp23:28:061
2877099141,4cyclictest29400-21x2golistsession22:20:101
28770991414,0cyclictest0-21swapper/122:19:561
28770991414,0cyclictest0-21swapper/100:06:521
28770991414,0cyclictest0-21swapper/100:06:511
28770991413,1cyclictest0-21swapper/120:07:481
28770991410,0cyclictest0-21swapper/121:25:121
2877099140,4cyclictest11542-21x2gosqlitewrapp00:38:151
2877099140,1cyclictest632-21irqbalance00:28:411
2877099140,14cyclictest0-21swapper/121:23:521
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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