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2022-12-02 - 19:53

x86 Intel Core i7-3770 @3400 MHz, Linux 3.18.69-rt75 (Profile)

Latency plot of system in rack #8, 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
Characteristics of the 20 highest latencies:
System rack8slot5.osadl.org (updated Fri Dec 02, 2022 12:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
867927857,8sleep60-21swapper/602:40:006
868827656,17sleep40-21swapper/402:40:064
863227543,18sleep70-21swapper/702:39:217
863027453,8sleep50-21swapper/502:39:195
864626747,17sleep30-21swapper/302:39:333
857026333,8sleep10-21swapper/102:38:271
862725543,9sleep20-21swapper/202:39:162
864325231,8sleep00-21swapper/002:39:300
886299190,18cyclictest0-21swapper/105:14:341
8872991714,2cyclictest0-21swapper/605:29:456
888099160,15cyclictest0-21swapper/706:30:357
888099160,15cyclictest0-21swapper/705:07:127
887299160,15cyclictest0-21swapper/607:17:386
887299160,15cyclictest0-21swapper/606:40:166
887299160,15cyclictest0-21swapper/605:33:576
8866991613,2cyclictest0-21swapper/505:29:405
886699160,15cyclictest0-21swapper/505:15:475
886699160,15cyclictest0-21swapper/505:07:345
8865991613,2cyclictest0-21swapper/406:49:104
8865991613,2cyclictest0-21swapper/406:17:364
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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