You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2023-01-29 - 06:42

x86 Intel Core i9-9900K @3600 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #0, 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: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack0slot7.osadl.org (updated Sun Jan 29, 2023 00:45:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22277182233228,2sleep100-21swapper/1019:08:032
22278002191185,3sleep110-21swapper/1119:08:523
22260932185179,3sleep10-21swapper/119:05:281
22266012171163,4sleep50-21swapper/519:05:3311
22278092158146,6sleep30-21swapper/319:09:009
2227452211379,30sleep150-21swapper/1519:05:437
22278082108107,0sleep20-21swapper/219:08:598
769720980,68pipewire0-21swapper/1319:09:125
769220970,77pipewire-pulse0-21swapper/819:05:3514
222767329661,31sleep140-21swapper/1419:07:356
222714729188,1sleep120-21swapper/1219:05:404
222748928885,1sleep90-21swapper/919:05:5315
222751128784,2sleep60-21swapper/619:06:0512
769220840,71pipewire-pulse0-21swapper/019:05:080
221299528279,1sleep40-21swapper/419:05:1610
2228257997715,62cyclictest0-21swapper/1100:10:343
2228257997512,21cyclictest0-21swapper/1100:39:083
2228257997310,42cyclictest769220pipewire-pulse20:32:303
222825799709,41cyclictest0-21swapper/1100:16:583
222826399690,68cyclictest3121285-21ssh23:14:127
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional