You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2022-01-23 - 09:17

Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz, Linux 5.15.13-rt26 (Profile)

Latency plot of system in rack #0, slot #6
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 10 highest latencies:
System rack0slot6.osadl.org (updated Sun Jan 23, 2022 00:45:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25459012372365,4sleep80-21swapper/819:05:2914
25468492364326,12sleep90-21swapper/919:06:3415
25469422359341,12sleep120-21swapper/1219:07:574
25468872359353,4sleep110-21swapper/1119:07:093
25468152357316,14sleep130-21swapper/1319:06:065
254738599355125,230cyclictest0-21swapper/721:59:4113
25469722353333,13sleep60-21swapper/619:08:2412
25469712352333,12sleep50-21swapper/519:08:2311
25469692352332,13sleep30-21swapper/319:08:229
25468732352333,13sleep140-21swapper/1419:06:556
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional