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2023-12-08 - 23:48
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 rack3slot6 (updated Tue Dec 05, 2023 00:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24883991448,63cyclictest7629-21/usr/sbin/munin19:50:281
248839914313,67cyclictest0-21swapper/121:45:211
248789912694,18cyclictest14-21ksoftirqd/020:15:230
248789912293,18cyclictest14-21ksoftirqd/000:10:220
248839912185,22cyclictest26-21ksoftirqd/122:15:201
248789912190,19cyclictest14-21ksoftirqd/000:25:210
248789911989,18cyclictest14-21ksoftirqd/021:00:240
248789911883,23cyclictest14-21ksoftirqd/020:00:210
24878991149,89cyclictest0-21swapper/022:30:200
248789911484,20cyclictest14-21ksoftirqd/020:55:210
248839911368,32cyclictest26-21ksoftirqd/121:10:221
248789911282,18cyclictest14-21ksoftirqd/020:20:220
248789911181,20cyclictest14-21ksoftirqd/022:10:220
248789911079,18cyclictest14-21ksoftirqd/022:45:230
248789910913,81cyclictest0-21swapper/000:00:210
248789910913,81cyclictest0-21swapper/000:00:210
248789910413,75cyclictest0-21swapper/023:20:220
248789910371,19cyclictest14-21ksoftirqd/021:20:200
248789910353,42cyclictest14-21ksoftirqd/022:05:190
248789910271,19cyclictest14-21ksoftirqd/021:15:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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