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2023-05-30 - 19:36

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

Latency plot of system in rack #d, slot #2
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 rackdslot2.osadl.org (updated Tue May 30, 2023 12:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2407021500,10sleep0843399cyclictest12:20:270
2475621020,5sleep125-21ksoftirqd/107:45:051
133991930,4ptp4l401ktimersoftd/307:05:393
8436998773,7cyclictest41-21ksoftirqd/310:10:193
8436998570,8cyclictest41-21ksoftirqd/310:05:163
160442850,5sleep11313-21lldpd07:25:291
8436997965,8cyclictest41-21ksoftirqd/311:35:223
8436997953,20cyclictest41-21ksoftirqd/307:25:243
8436997765,6cyclictest41-21ksoftirqd/309:10:213
8436997764,6cyclictest41-21ksoftirqd/311:50:163
8436997159,8cyclictest41-21ksoftirqd/309:45:203
133991710,1ptp4l401ktimersoftd/309:50:153
8436997058,7cyclictest41-21ksoftirqd/307:40:243
55498690,51rtkit-daemon19682-21apache207:05:220
8434996831,8cyclictest25-21ksoftirqd/111:40:361
8436996654,7cyclictest41-21ksoftirqd/309:25:213
8436996553,7cyclictest41-21ksoftirqd/311:15:193
8434996528,8cyclictest25-21ksoftirqd/111:30:381
177422650,8sleep0843399cyclictest12:05:330
8434996429,5cyclictest25-21ksoftirqd/108:55:361
8434996427,8cyclictest25-21ksoftirqd/110:45:271
8434996427,7cyclictest25-21ksoftirqd/109:15:341
133991640,1ptp4l401ktimersoftd/308:47:503
133991640,1ptp4l401ktimersoftd/308:47:493
8434996330,8cyclictest25-21ksoftirqd/111:55:481
8434996329,9cyclictest25-21ksoftirqd/108:10:251
8436996252,6cyclictest41-21ksoftirqd/308:15:203
8436996251,6cyclictest41-21ksoftirqd/311:40:193
8434996232,4cyclictest25-21ksoftirqd/108:40:241
8434996229,9cyclictest25-21ksoftirqd/108:05:001
8434996226,7cyclictest25-21ksoftirqd/107:40:331
8436996153,5cyclictest41-21ksoftirqd/309:15:183
8436996151,5cyclictest41-21ksoftirqd/310:45:183
8434996129,9cyclictest25-21ksoftirqd/109:15:011
8434996128,8cyclictest25-21ksoftirqd/111:00:351
8434996127,9cyclictest25-21ksoftirqd/109:05:351
8434996126,9cyclictest25-21ksoftirqd/109:42:361
8434996126,9cyclictest25-21ksoftirqd/109:42:361
8434996126,7cyclictest25-21ksoftirqd/112:30:031
8434996125,7cyclictest25-21ksoftirqd/110:36:211
8434996125,7cyclictest25-21ksoftirqd/110:36:211
8434996123,4cyclictest25-21ksoftirqd/108:22:011
133991610,1ptp4l401ktimersoftd/311:22:113
8434996026,5cyclictest25-21ksoftirqd/107:35:241
8434996026,4cyclictest25-21ksoftirqd/109:00:211
8434996025,9cyclictest25-21ksoftirqd/110:33:241
8434996025,8cyclictest25-21ksoftirqd/110:04:111
8434996025,7cyclictest25-21ksoftirqd/109:27:091
8434996024,8cyclictest25-21ksoftirqd/112:20:291
8434996024,7cyclictest25-21ksoftirqd/111:20:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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