You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2021-06-20 - 03:28

Intel(R) Core(TM) i5-6440EQ CPU @ 2.70GHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #5, 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 -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 rack5slot2.osadl.org (updated Fri Jun 11, 2021 12:44:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
101792189172,12sleep20-21swapper/207:09:542
99472183167,11sleep10-21swapper/107:06:521
101772181164,12sleep00-21swapper/007:09:530
101232180164,12sleep30-21swapper/307:09:103
69692100,0sleep30-21swapper/312:36:103
314072100,0sleep10-21swapper/110:20:131
221982100,0sleep10-21swapper/109:37:261
31097290,0sleep00-21swapper/012:31:230
103799972,5cyclictest12921-21kworker/3:011:41:123
103799971,6cyclictest12921-21kworker/3:011:47:563
103639971,3cyclictest30184-21munin-run11:35:010
103799962,4cyclictest12921-21kworker/3:012:14:463
103799961,5cyclictest12921-21kworker/3:011:50:033
103709961,3cyclictest0-21swapper/107:45:161
103639960,6cyclictest0-21swapper/010:42:300
103639960,5cyclictest28329-21munin-run08:50:010
103639960,3cyclictest6394-21munin-run11:40:000
11504250,0sleep3391ktimersoftd/310:26:593
103799955,0cyclictest0-21swapper/312:34:013
103799952,3cyclictest12921-21kworker/3:012:18:463
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional