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2023-05-28 - 14:21

x86 Intel Celeron G1620 @2700 MHz, Linux 5.15.96-rt61 (Profile)

Latency plot of system in rack #8, slot #7
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: ondemand
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack8slot7.osadl.org (updated Sun May 28, 2023 00:43:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1181799261,2cyclictest25413-21x2golistsession19:31:221
11816992220,1cyclictest0-21swapper/000:03:510
11816992019,1cyclictest0-21swapper/023:55:120
11816992019,1cyclictest0-21swapper/022:53:010
11816992017,2cyclictest21885-21grep21:40:250
11817991917,1cyclictest0-21swapper/122:11:411
11817991716,1cyclictest0-21swapper/122:25:311
11817991615,1cyclictest0-21swapper/122:18:211
11816991514,1cyclictest0-21swapper/023:45:430
1181799138,3cyclictest381-21x2gosqlitewrapp23:56:311
11817991312,1cyclictest0-21swapper/123:51:111
11816991312,1cyclictest0-21swapper/022:29:190
1181799127,3cyclictest19858-21x2golistsession23:46:141
1181799122,8cyclictest18231-21x2gosqlitewrapp22:03:191
1181799121,10cyclictest40350irq/26-topwin22:24:481
1181799119,1cyclictest2285-21rm23:32:511
1181799118,2cyclictest5745-21x2gosqlitewrapp00:26:081
1181799118,2cyclictest13482-21x2golistsession21:34:211
1181799116,4cyclictest25042-21entropy23:25:241
1181799116,3cyclictest8507-21x2gosqlitewrapp23:37:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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