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2021-09-20 - 03:12

Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #8, slot #3
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 rack8slot3.osadl.org (updated Mon Sep 20, 2021 00:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
58832217108,104sleep30-21swapper/319:06:013
6147217987,88sleep10-21swapper/119:09:041
59942176160,12sleep20-21swapper/219:07:212
59922119109,6sleep00-21swapper/019:07:180
2288421120,1sleep00-21swapper/023:23:400
327582810,3sleep10-21swapper/121:19:421
6476993319,13cyclictest0-21swapper/223:23:462
6476993214,17cyclictest0-21swapper/223:36:512
647699319,21cyclictest0-21swapper/200:31:532
647699315,25cyclictest0-21swapper/200:25:242
6476993114,16cyclictest0-21swapper/222:55:512
647699309,20cyclictest0-21swapper/222:07:572
647699307,22cyclictest0-21swapper/222:39:572
647699307,22cyclictest0-21swapper/222:12:072
6476993019,11cyclictest0-21swapper/221:43:092
6476993019,10cyclictest0-21swapper/221:37:432
6476993016,13cyclictest0-21swapper/223:09:312
6476992918,10cyclictest0-21swapper/221:21:202
6476992915,13cyclictest0-21swapper/221:19:572
6476992915,13cyclictest0-21swapper/221:13:292
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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