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2023-01-28 - 11:02

x86 Intel Atom E3845 @1910 MHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, slot #4
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 -Up99 -i200 -h400 --smi -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 50 highest latencies:
System rackdslot4.osadl.org (updated Sat Jan 28, 2023 00:46:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1919222080,8sleep00-21swapper/019:05:260
3255321570,5sleep32051299cyclictest00:10:133
452921540,7sleep22051199cyclictest22:00:302
564981520,10rtkit-daemon563-21rtkit-daemon19:06:512
1299911210,47ptp4l41-21ksoftirqd/319:06:043
129991850,1ptp4l401ktimersoftd/321:56:233
2014527857,9sleep10-21swapper/119:08:591
129991690,2ptp4l401ktimersoftd/323:50:243
97592650,5sleep39762-21unixbench_multi22:10:343
97592650,5sleep39762-21unixbench_multi22:10:343
2051199579,5cyclictest33-21ksoftirqd/223:00:322
20510995346,4cyclictest28510-21cron21:45:001
20509995345,5cyclictest10819-21cron23:25:000
20512994942,4cyclictest41-21ksoftirqd/322:50:013
20512994942,4cyclictest41-21ksoftirqd/319:50:013
1298914942,3phc2sys41-21ksoftirqd/323:30:263
20510994735,10cyclictest25-21ksoftirqd/120:00:171
20512994640,3cyclictest41-21ksoftirqd/323:10:003
20512994639,4cyclictest41-21ksoftirqd/323:40:003
20512994639,4cyclictest41-21ksoftirqd/320:35:013
321332450,2sleep032136-21grep20:40:300
321332450,2sleep032136-21grep20:40:300
20512994539,4cyclictest41-21ksoftirqd/300:00:013
20511994538,4cyclictest33-21ksoftirqd/219:36:342
20511994527,6cyclictest33-21ksoftirqd/222:52:192
20509994539,4cyclictest9-21ksoftirqd/021:40:000
20512994438,4cyclictest41-21ksoftirqd/321:40:003
20512994438,3cyclictest41-21ksoftirqd/322:55:003
20511994437,4cyclictest33-21ksoftirqd/223:15:112
20510994431,10cyclictest25-21ksoftirqd/123:11:191
2051099440,11cyclictest4123-21taskset19:42:551
20509994438,4cyclictest9-21ksoftirqd/020:25:340
129991440,1ptp4l401ktimersoftd/320:49:103
129991440,1ptp4l401ktimersoftd/320:49:103
129991440,1ptp4l401ktimersoftd/320:10:263
20512994333,8cyclictest41-21ksoftirqd/321:11:563
20511994337,4cyclictest33-21ksoftirqd/221:50:332
2051199432,7cyclictest33-21ksoftirqd/220:39:462
20510994338,3cyclictest25-21ksoftirqd/121:26:581
20510994336,4cyclictest25-21ksoftirqd/123:02:521
129991430,20ptp4l401ktimersoftd/323:45:133
129991430,1ptp4l401ktimersoftd/300:35:253
20512994236,4cyclictest41-21ksoftirqd/323:25:293
20512994235,4cyclictest41-21ksoftirqd/322:30:113
20512994234,4cyclictest41-21ksoftirqd/319:37:583
20511994224,4cyclictest33-21ksoftirqd/221:11:462
2051199421,7cyclictest33-21ksoftirqd/219:48:152
20510994237,3cyclictest25-21ksoftirqd/120:05:161
20509994236,3cyclictest9-21ksoftirqd/021:34:200
20509994236,3cyclictest9-21ksoftirqd/021:02:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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