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2023-06-03 - 07:45

x86 Intel Core i3-2350M @2300 MHz, Linux 4.18.7-rt5 (Profile)

Latency plot of system in rack #6, slot #8
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 rack6slot8.osadl.org (updated Sat Jun 03, 2023 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
62759910471039,6cyclictest6576-21kerneloops00:10:032
62769910351027,6cyclictest6576-21kerneloops00:25:453
62749910301022,6cyclictest6576-21kerneloops20:45:061
62769910291022,5cyclictest6576-21kerneloops20:57:343
62749910291021,7cyclictest6576-21kerneloops00:00:401
62769910281021,5cyclictest6576-21kerneloops21:07:473
62769910281020,6cyclictest6576-21kerneloops23:14:243
62749910281022,5cyclictest6576-21kerneloops23:15:571
62749910281022,5cyclictest6576-21kerneloops19:18:201
62749910281022,5cyclictest6576-21kerneloops19:18:201
62749910281022,5cyclictest6576-21kerneloops00:20:391
62749910281019,7cyclictest6576-21kerneloops20:12:001
62769910271019,6cyclictest6576-21kerneloops20:11:193
62769910261019,5cyclictest6576-21kerneloops20:38:593
62769910261019,5cyclictest6576-21kerneloops00:20:293
62769910261018,6cyclictest6576-21kerneloops19:27:273
62749910261020,5cyclictest6576-21kerneloops23:13:221
62749910261020,5cyclictest6576-21kerneloops20:31:471
62749910261019,5cyclictest6576-21kerneloops22:12:431
62749910261018,6cyclictest6576-21kerneloops00:16:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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