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2021-01-19 - 06:07

Intel(R) Atom(TM) CPU E3845 @ 1.91GHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, slot #1
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 rackdslot1.osadl.org (updated Fri Jan 15, 2021 00:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1146911880,15ptp4l0-21swapper/219:08:102
1146911880,15ptp4l0-21swapper/219:08:102
3056721790,9sleep22614899cyclictest22:50:182
1146911750,13ptp4l0-21swapper/319:06:203
1146911750,13ptp4l0-21swapper/319:06:203
2281421660,8sleep12614799cyclictest19:45:161
1146911660,8ptp4l0-21swapper/019:05:340
1146911660,8ptp4l0-21swapper/019:05:330
1139621660,8sleep32614999cyclictest19:30:173
118791163142,9phc2sys0-21swapper/119:09:541
118791163142,9phc2sys0-21swapper/119:09:531
26146997862,11cyclictest9-21ksoftirqd/021:15:070
26147997233,8cyclictest25-21ksoftirqd/123:25:101
26147997233,8cyclictest25-21ksoftirqd/122:05:071
26147997134,9cyclictest25-21ksoftirqd/119:30:021
26147997132,7cyclictest25-21ksoftirqd/119:55:231
114691680,4ptp4l17378-21iostat_ios20:25:100
26147996731,8cyclictest25-21ksoftirqd/123:55:181
114691670,2ptp4l0-21swapper/021:25:050
26147996636,4cyclictest25-21ksoftirqd/123:10:231
26147996632,9cyclictest25-21ksoftirqd/100:15:051
26147996630,9cyclictest25-21ksoftirqd/119:35:581
26147996630,8cyclictest25-21ksoftirqd/121:20:151
26147996629,8cyclictest25-21ksoftirqd/123:15:061
114691660,4ptp4l17073-21memory00:00:150
26147996531,9cyclictest25-21ksoftirqd/122:55:141
26147996529,7cyclictest25-21ksoftirqd/121:50:091
114691650,6ptp4l30771-21df_abs00:20:071
26147996433,4cyclictest25-21ksoftirqd/120:01:111
26147996433,4cyclictest25-21ksoftirqd/119:10:171
26147996433,4cyclictest25-21ksoftirqd/119:10:171
26147996433,4cyclictest25-21ksoftirqd/100:25:211
26147996432,8cyclictest25-21ksoftirqd/119:25:071
26147996431,9cyclictest25-21ksoftirqd/122:50:031
26147996431,8cyclictest25-21ksoftirqd/120:35:081
26147996431,5cyclictest25-21ksoftirqd/121:12:291
26147996429,8cyclictest25-21ksoftirqd/122:40:101
26147996428,9cyclictest25-21ksoftirqd/120:17:581
26147996427,8cyclictest25-21ksoftirqd/123:30:111
114691640,6ptp4l20039-21apt22:40:001
91002630,5sleep09103-21timerandwakeup23:50:140
2614799634,7cyclictest25-21ksoftirqd/119:15:051
26147996331,9cyclictest25-21ksoftirqd/119:40:131
26147996330,9cyclictest25-21ksoftirqd/100:00:061
26147996327,8cyclictest25-21ksoftirqd/121:30:021
26147996327,8cyclictest25-21ksoftirqd/121:01:341
114691630,5ptp4l31223-21iostat_ios22:10:110
114691630,5ptp4l31223-21iostat_ios22:10:100
114691630,2ptp4l0-21swapper/023:05:050
2614999629,7cyclictest41-21ksoftirqd/321:10:533
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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