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2022-05-26 - 00:47

x86 Intel Core i5-8265UE @1600 MHz, Linux 5.10.41-rt42 (Profile)

Latency plot of system in rack #a, 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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackaslot8.osadl.org (updated Fri May 20, 2022 00:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9422303277,15sleep00-21swapper/019:07:530
8542303273,19sleep20-21swapper/219:06:462
8382299272,18sleep10-21swapper/119:06:331
11002256228,17sleep30-21swapper/319:09:543
318172610,0sleep00-21swapper/000:15:210
140532610,0sleep30-21swapper/323:23:023
11472590,1sleep30-21swapper/320:20:113
245722570,1sleep10-21swapper/122:30:111
304052560,0sleep10-21swapper/123:33:101
116392550,0sleep10-21swapper/121:41:581
323732520,0sleep20-21swapper/200:39:222
37022390,0sleep00-21swapper/023:56:400
277022220,0sleep30-21swapper/300:13:163
95022180,0sleep20-21swapper/223:20:142
49302180,0sleep10-21swapper/123:17:131
296052160,0sleep30-21swapper/323:32:313
83922140,0sleep30-21swapper/323:19:583
320042140,0sleep30-21swapper/320:15:143
223072110,0sleep30-21swapper/321:29:143
12139990,8cyclictest8214-21irqstats21:20:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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