You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2021-06-17 - 19:07

Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz, Linux 5.10.27-rt36 (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 Thu Jun 17, 2021 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
386741499449449,0cyclictest19850irq/127-xhci_hc21:22:484
386741499449448,1cyclictest3931533-21kworker/12:123:44:454
386741499449447,1cyclictest3931533-21kworker/12:122:25:424
386741499448447,1cyclictest3931533-21kworker/12:122:24:144
3867395994480,0cyclictest0-21swapper/722:34:5513
386736999448447,1cyclictest3829532-21kworker/u32:419:12:001
3867417994470,0cyclictest0-21swapper/1321:10:345
3867417994470,0cyclictest0-21swapper/1321:10:345
386740699447446,1cyclictest4021826-21kworker/u32:321:46:442
386738099447447,0cyclictest4160076-21kworker/u32:123:49:459
386742499446445,1cyclictest4077550-21kworker/u32:022:40:327
386742499445445,0cyclictest4117138-21munin-run22:40:007
3867424994450,0cyclictest0-21swapper/1522:25:007
386740699445444,1cyclictest4050453-21kworker/u32:122:28:462
386736999445444,1cyclictest4093850-21kworker/u32:322:24:141
3867424994440,444cyclictest0-21swapper/1500:34:157
386741799444443,1cyclictest3976848-21kworker/u32:021:05:105
386740699444444,0cyclictest0-21swapper/1000:35:462
386736999444444,0cyclictest0-21swapper/123:44:441
386742499442441,1cyclictest4147043-21turbostat23:04:567
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional