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2023-05-28 - 22:31

x86 Intel Celeron M @1600 MHz, Linux 5.4.74-rt41 (Profile)

Latency plot of system in rack #6, slot #6
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 -n -a0 -t1 -p99 -i200 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Characteristics of the 20 highest latencies:
System rack6slot6.osadl.org (updated Sun May 28, 2023 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
204839910722953428,53678cyclictest1918-21snmpd08:41:570
204839910708853408,53557cyclictest3845-21ssh12:12:370
204839910675553485,53177cyclictest0-21swapper10:36:300
204839910670153389,53223cyclictest3950irq/9-acpi10:11:230
204839910667553475,53200cyclictest0-21swapper11:27:040
204839910655853428,53040cyclictest0-21swapper08:29:430
204839910655353482,52974cyclictest9-21ksoftirqd/010:08:220
204839910654253412,53037cyclictest0-21swapper09:14:260
204839910652053476,53044cyclictest0-21swapper07:30:060
204839910650853469,53039cyclictest0-21swapper10:55:550
204839910649853475,53023cyclictest0-21swapper10:16:540
204839910649453470,53024cyclictest0-21swapper12:15:180
204839910646853489,52979cyclictest0-21swapper08:19:500
204839910646453410,53054cyclictest0-21swapper07:12:310
204839910646353454,53009cyclictest0-21swapper10:41:510
204839910646153459,53002cyclictest0-21swapper10:23:560
204839910645853408,53050cyclictest0-21swapper07:55:430
204839910643453396,53038cyclictest0-21swapper07:36:580
204839910641053435,52975cyclictest0-21swapper12:31:530
204839910638853442,52946cyclictest0-21swapper07:25:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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