You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-07-01 - 01:37

x86 Intel Celeron G1620 @2700 MHz, Linux 5.4.17-rt9 (Profile)

Latency plot of system in rack #9, slot #5
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 rack9slot5.osadl.org (updated Thu Jun 30, 2022 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36752990,0sleep13672-21x2golistsession09:38:391
143402960,0sleep114339-21x2gosqlitewrapp08:37:171
312862470,0sleep10-21swapper/108:48:511
293592470,1sleep129356-21tune2fs07:28:141
34842460,0sleep10-21swapper/110:02:471
36292450,0sleep00-21swapper/010:25:220
26932450,0sleep10-21swapper/108:20:031
78812420,0sleep10-21swapper/111:14:371
284462420,0sleep10-21swapper/107:27:301
296872400,0sleep00-21swapper/010:21:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional