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2023-06-05 - 12:08

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

Latency plot of system in rack #d, slot #3
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 rackdslot3.osadl.org (updated Mon Jun 05, 2023 00:45:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2577221800,4sleep11856199cyclictest00:00:311
1862921800,9sleep21856299cyclictest23:45:312
1862921800,9sleep21856299cyclictest23:45:312
2055621780,8sleep21856299cyclictest23:50:252
2849521670,8sleep21856299cyclictest19:30:292
1115221230,4sleep11123-21snmpd22:20:281
2221521180,8sleep21856299cyclictest20:25:252
576981030,7rtkit-daemon0-21swapper/119:07:221
185639910189,6cyclictest41-21ksoftirqd/300:35:183
825591990,1ptp4l24812-21kworker/3:000:10:423
18563999784,7cyclictest41-21ksoftirqd/322:50:213
825591820,3ptp4l401ktimersoftd/319:06:253
18563997318,4cyclictest41-21ksoftirqd/322:55:373
182642715,13sleep20-21swapper/219:09:532
18563997027,7cyclictest41-21ksoftirqd/319:15:323
18563996935,9cyclictest41-21ksoftirqd/300:20:253
18563996935,5cyclictest41-21ksoftirqd/322:06:513
18563996657,5cyclictest41-21ksoftirqd/321:25:203
18563996657,5cyclictest41-21ksoftirqd/321:25:193
18563996624,9cyclictest41-21ksoftirqd/321:45:003
18563996623,9cyclictest41-21ksoftirqd/321:20:393
825591650,1ptp4l401ktimersoftd/323:19:323
18563996530,7cyclictest41-21ksoftirqd/300:25:243
18563996525,7cyclictest41-21ksoftirqd/321:45:333
825591640,1ptp4l401ktimersoftd/322:17:573
825591640,1ptp4l401ktimersoftd/320:59:293
18563996429,7cyclictest41-21ksoftirqd/323:40:323
18563996424,7cyclictest41-21ksoftirqd/320:35:173
18563996424,5cyclictest41-21ksoftirqd/319:50:253
18563996424,4cyclictest41-21ksoftirqd/320:41:363
18563996423,8cyclictest41-21ksoftirqd/323:01:033
18563996422,8cyclictest41-21ksoftirqd/320:10:353
106882640,7sleep31856399cyclictest22:20:223
825591630,2ptp4l401ktimersoftd/321:09:033
18563996322,12cyclictest41-21ksoftirqd/322:37:093
18563996322,12cyclictest41-21ksoftirqd/322:37:083
825591620,1ptp4l401ktimersoftd/300:01:313
18563996228,5cyclictest41-21ksoftirqd/320:18:513
18563996228,5cyclictest41-21ksoftirqd/320:18:503
18563996224,5cyclictest41-21ksoftirqd/321:13:183
18563996223,9cyclictest41-21ksoftirqd/321:03:373
18563996223,5cyclictest41-21ksoftirqd/319:40:233
18563996130,8cyclictest41-21ksoftirqd/323:13:243
18563996127,4cyclictest41-21ksoftirqd/319:14:593
18563996127,4cyclictest41-21ksoftirqd/319:14:583
18563996122,5cyclictest41-21ksoftirqd/321:15:283
18563996053,4cyclictest41-21ksoftirqd/323:30:163
18563996029,7cyclictest41-21ksoftirqd/323:57:313
18563996027,4cyclictest41-21ksoftirqd/319:47:043
18563996027,4cyclictest41-21ksoftirqd/319:27:073
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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