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2022-10-03 - 09:43

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 Mon Oct 03, 2022 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32422720,0sleep03240-21x2gosqlitewrapp23:43:200
297072510,1sleep0101rcuc/020:59:010
218502480,0sleep00-21swapper/022:47:350
62392470,0sleep10-21swapper/123:22:171
90242450,1sleep0101rcuc/020:08:050
15862440,0sleep00-21swapper/020:39:120
315862430,0sleep00-21swapper/022:09:050
128272410,0sleep00-21swapper/022:40:520
7922390,0sleep00-21swapper/023:18:560
221402350,0sleep00-21swapper/023:10:040
57652216,11sleep00-21swapper/018:32:230
59952195,10sleep10-21swapper/118:33:021
293232160,0sleep10-21swapper/123:15:161
264599160,1rtkit-daemon2644-21rtkit-daemon23:26:460
6720991513,1cyclictest16064-21ssh20:49:311
671999140,13cyclictest32509-21ntp_states22:54:530
264599140,1rtkit-daemon2644-21rtkit-daemon22:06:561
264599140,1rtkit-daemon2644-21rtkit-daemon19:53:130
264599140,1rtkit-daemon2644-21rtkit-daemon19:20:020
195482140,0sleep00-21swapper/021:37:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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