You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2022-01-23 - 20:16

Intel(R) Xeon(R) CPU E3-1265L V2 @ 2.50GHz, Linux 4.14.28-rt23 (Profile)

Latency plot of system in rack #0, slot #0
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 --smi -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 10 highest latencies:
System rack0slot0.osadl.org (updated Sun Jan 23, 2022 12:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
398921470,1sleep50-21swapper/511:46:355
3161821430,0sleep70-21swapper/711:21:057
3161821430,0sleep70-21swapper/711:21:047
1948021150,0sleep50-21swapper/509:50:455
1405321090,0sleep20-21swapper/210:32:582
248282920,0sleep70-21swapper/709:15:447
60832860,1sleep50-21swapper/509:45:405
128192860,1sleep60-21swapper/610:15:076
128192860,1sleep60-21swapper/610:15:076
170222840,0sleep70-21swapper/711:48:067
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional