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2021-06-20 - 03:21

Intel(R) Atom(TM) CPU E3845 @ 1.91GHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, 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 -Up99 -i200 -h400 --smi -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 rackdslot2.osadl.org (updated Sun Jun 20, 2021 00:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1549222390,4sleep212671-21execl19:05:242
1549222390,4sleep212671-21execl19:05:242
1306922260,6sleep012671-21execl19:05:020
1306922260,6sleep012671-21execl19:05:010
1527022190,6sleep312671-21execl19:05:213
1527022190,6sleep312671-21execl19:05:213
1938921820,8sleep01708499cyclictest19:17:310
982621730,8sleep31709499cyclictest23:25:013
2328621730,4sleep31709499cyclictest19:22:203
2876421620,3sleep31709499cyclictest22:25:273
251621350,9sleep11708699cyclictest19:25:501
320792790,3sleep132095-21sh19:24:411
171652790,8sleep01708499cyclictest19:22:130
156772750,3sleep112677-21execl19:05:271
156772750,3sleep112677-21execl19:05:261
136162720,9sleep31709499cyclictest19:17:113
17094996854,8cyclictest41-21ksoftirqd/320:10:123
265112630,2sleep10-21swapper/123:45:021
233992630,5sleep123415-21spawn19:17:131
326872600,6sleep032707-21sh19:26:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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