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2022-06-25 - 03:35

x86 Intel Atom E3845 @1910 MHz, 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 50 highest latencies:
System rackdslot2.osadl.org (updated Mon Mar 07, 2022 12:46:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
616623150,4sleep20-21swapper/207:05:262
7670999683,7cyclictest25-21ksoftirqd/107:25:181
723029676,9sleep30-21swapper/307:08:033
70852765,18sleep10-21swapper/107:06:111
297532760,3sleep10-21swapper/107:35:191
72672752,18sleep00-21swapper/007:08:320
211752730,3sleep00-21swapper/012:05:140
7670997158,8cyclictest25-21ksoftirqd/108:50:191
260242660,3sleep10-21swapper/109:30:211
260242660,3sleep10-21swapper/109:30:211
7669996427,7cyclictest9-21ksoftirqd/011:20:000
7670996146,7cyclictest25-21ksoftirqd/109:35:191
7669996125,5cyclictest9-21ksoftirqd/012:15:140
766999597,10cyclictest9-21ksoftirqd/011:45:080
7669995928,5cyclictest9-21ksoftirqd/007:15:120
7669995927,5cyclictest9-21ksoftirqd/010:50:130
7669995927,5cyclictest9-21ksoftirqd/010:50:130
7669995925,10cyclictest9-21ksoftirqd/008:50:220
7670995849,4cyclictest25-21ksoftirqd/108:40:191
7670995843,8cyclictest25-21ksoftirqd/109:05:191
766999585,8cyclictest9-21ksoftirqd/009:05:190
7669995828,9cyclictest9-21ksoftirqd/009:15:000
7669995827,5cyclictest9-21ksoftirqd/011:10:130
141682580,2sleep30-21swapper/307:55:243
766999577,9cyclictest9-21ksoftirqd/011:50:280
766999577,10cyclictest9-21ksoftirqd/009:35:080
766999575,8cyclictest9-21ksoftirqd/012:00:160
7669995723,9cyclictest9-21ksoftirqd/007:35:160
7670995641,9cyclictest25-21ksoftirqd/107:45:171
766999567,9cyclictest9-21ksoftirqd/008:05:130
766999567,10cyclictest9-21ksoftirqd/011:25:120
766999565,7cyclictest9-21ksoftirqd/008:25:110
766999564,12cyclictest9-21ksoftirqd/008:30:200
7669995626,5cyclictest9-21ksoftirqd/011:40:290
766999557,9cyclictest9-21ksoftirqd/010:45:170
766999557,9cyclictest9-21ksoftirqd/010:00:230
766999557,9cyclictest9-21ksoftirqd/008:00:010
766999556,9cyclictest9-21ksoftirqd/012:20:380
766999556,9cyclictest9-21ksoftirqd/011:10:000
766999556,9cyclictest9-21ksoftirqd/010:30:110
766999556,10cyclictest9-21ksoftirqd/010:10:050
766999556,10cyclictest9-21ksoftirqd/009:00:200
766999555,7cyclictest9-21ksoftirqd/007:50:190
766999554,7cyclictest9-21ksoftirqd/008:50:010
7669995544,6cyclictest9-21ksoftirqd/010:40:050
766999547,9cyclictest9-21ksoftirqd/011:20:060
766999547,12cyclictest9-21ksoftirqd/012:25:140
766999547,12cyclictest9-21ksoftirqd/008:40:080
766999546,9cyclictest9-21ksoftirqd/010:35:150
766999546,9cyclictest9-21ksoftirqd/009:45:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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