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2021-10-24 - 01:05

Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz, Linux 5.10.1-rt20 (Profile)

Latency plot of system in rack #0, 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 --smi
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 rack0slot2.osadl.org (updated Sat Oct 23, 2021 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9748082620,0sleep20-21swapper/222:35:082
81071226050,6sleep40-21swapper/419:04:164
81041025849,6sleep60-21swapper/619:01:056
8851952570,0sleep40-21swapper/421:14:454
11035912570,0sleep331-21ksoftirqd/300:31:223
10494062570,0sleep50-21swapper/523:42:395
9914832560,0sleep20-21swapper/222:50:062
9914832560,0sleep20-21swapper/222:50:062
81071025647,6sleep30-21swapper/319:04:153
9578842550,0sleep30-21swapper/322:20:033
9116772530,0sleep00-21swapper/021:38:040
81043224536,6sleep20-21swapper/219:01:182
81061223926,6sleep50-21swapper/519:03:135
81054223929,6sleep70-21swapper/719:02:277
81044423219,6sleep10-21swapper/119:01:251
81059222819,6sleep00-21swapper/019:03:000
811054991912,1cyclictest0-21swapper/620:20:106
81104999183,14cyclictest37-21ksoftirqd/421:45:494
81103599178,8cyclictest0-21swapper/120:40:131
10715662170,0sleep755-21ksoftirqd/700:02:517
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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