You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2021-07-26 - 17:47

Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz, Linux 5.10.1-rt20 (Profile)

Latency plot of system in rack #0, 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 --smi
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 rack0slot2.osadl.org (updated Mon Jul 26, 2021 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35885132670,0sleep20-21swapper/222:10:442
37437002650,0sleep20-21swapper/200:27:152
36330632650,0sleep00-21swapper/022:49:340
344515926150,7sleep40-21swapper/418:57:214
35419732580,0sleep10-21swapper/121:29:021
344521525849,6sleep30-21swapper/318:57:523
35169372540,0sleep30-21swapper/321:07:093
344563925243,6sleep60-21swapper/619:01:486
344563225041,6sleep20-21swapper/219:01:442
239921598430,35rtkit-daemon0-21swapper/019:00:430
344537723724,6sleep50-21swapper/518:59:225
344564523324,6sleep10-21swapper/119:01:511
344564022617,6sleep70-21swapper/719:01:497
344592899220,14cyclictest0-21swapper/520:53:255
3445921992214,7cyclictest3635957-21tune2fs22:52:133
344592899200,20cyclictest0-21swapper/522:49:165
36607422170,0sleep30-21swapper/323:13:403
35301672170,0sleep09-21ksoftirqd/021:18:120
3445917991710,1cyclictest0-21swapper/220:19:472
344593299160,15cyclictest0-21swapper/619:27:016
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional