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2023-01-29 - 06:28

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 20 highest latencies:
System rack9slot5.osadl.org (updated Sun Jan 29, 2023 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
174782950,0sleep117477-21x2gosqlitewrapp19:55:511
164882520,0sleep00-21swapper/020:58:480
140482440,1sleep014042-21unixbench_multi19:05:470
209252430,0sleep10-21swapper/122:10:411
140622420,0sleep00-21swapper/021:42:550
37502390,0sleep00-21swapper/021:12:240
1828822416,4sleep10-21swapper/118:26:421
185652192,4sleep00-21swapper/018:27:290
93302170,0sleep10-21swapper/119:00:371
264599160,1rtkit-daemon2644-21rtkit-daemon23:41:310
264599160,1rtkit-daemon2644-21rtkit-daemon22:02:520
264599150,1rtkit-daemon2644-21rtkit-daemon23:36:580
264599150,1rtkit-daemon2644-21rtkit-daemon21:53:331
264599150,1rtkit-daemon2644-21rtkit-daemon19:35:501
19747991513,1cyclictest21130-21x2gosqlitewrapp20:39:151
1974799150,14cyclictest29482-21ssh22:16:351
19746991513,1cyclictest18051-21ntpd21:47:480
1974699150,14cyclictest25084-21x2golistsession19:21:280
264599140,1rtkit-daemon2644-21rtkit-daemon22:58:220
264599140,1rtkit-daemon2644-21rtkit-daemon22:43:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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