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2019-07-16 - 02:12

Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz, Linux 4.19.50-rt22 (Profile)

Latency plot of system in rack #0, 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 rack0slot5.osadl.org (updated Tue Jul 16, 2019 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
201102730,0sleep20-21swapper/200:15:062
24143997068,1cyclictest1933-21gnome-shell00:26:572
24130996967,1cyclictest1933-21gnome-shell22:37:570
24175996866,1cyclictest7615-21kworker/7:222:16:337
24175996866,1cyclictest7438-21kworker/7:000:36:207
24175996866,1cyclictest6851-21kworker/7:021:37:397
24175996866,1cyclictest31810-21kworker/7:022:48:187
24175996866,1cyclictest30290-21kworker/7:221:00:067
24175996866,1cyclictest22433-21kworker/7:222:31:357
24175996866,1cyclictest1933-21gnome-shell21:19:587
24175996866,1cyclictest17988-21kworker/7:200:26:577
24175996866,1cyclictest12287-21kworker/7:023:32:207
24175996866,1cyclictest11236-21kworker/7:121:59:297
2415099680,1cyclictest0-21swapper/322:52:543
2415099680,1cyclictest0-21swapper/321:19:583
2415099680,0cyclictest0-21swapper/323:14:353
24175996765,1cyclictest17988-21kworker/7:200:31:027
24175996765,1cyclictest16749-21kworker/7:123:14:357
24175996765,1cyclictest14575-21kworker/7:122:24:047
24175996765,1cyclictest14409-21kworker/7:023:51:277
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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