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2024-04-23 - 20:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #2

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 50 highest latencies:
System rack0slot2s.osadl.org (updated Tue Apr 23, 2024 12:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
323702799446445,1cyclictest3393839-21kworker/9:2+events12:16:359
323702799446445,1cyclictest3317056-21kworker/9:2+events09:47:529
323702399445445,0cyclictest574863-21snmpd09:23:538
323702799444443,1cyclictest3353942-21kworker/9:2+events11:20:219
323702799444443,1cyclictest3335542-21kworker/9:1+events10:25:229
323702799444443,1cyclictest3282526-21kworker/9:0+events08:40:219
323702799444443,1cyclictest3261048-21kworker/9:1+events07:55:209
323702799444443,1cyclictest3225888-21kworker/9:1+events07:27:169
323702799444442,2cyclictest3348923-21turbostat10:44:559
323702799443442,1cyclictest3300943-21kworker/9:2+events09:15:239
323702799443442,1cyclictest3236641-21kworker/9:0+events07:20:239
323702799442441,1cyclictest3364691-21kworker/9:0+events11:16:169
323702799442441,1cyclictest3353942-21kworker/9:2+events10:55:219
323702799442441,1cyclictest3324726-21kworker/9:0+events09:52:129
323702799442441,1cyclictest3317056-21kworker/9:2+events09:55:229
323702799442441,1cyclictest3306315-21kworker/9:0+events09:20:219
323702799441440,1cyclictest3364691-21kworker/9:0+events11:14:199
323702799441440,1cyclictest3300943-21kworker/9:2+events09:14:139
323702799441440,1cyclictest3300943-21kworker/9:2+events09:07:099
323702799441440,1cyclictest3288383-21kworker/9:2+events08:49:199
323702799441440,1cyclictest3263734-21kworker/9:2+events08:06:149
323702799441440,1cyclictest3236641-21kworker/9:0+events07:19:169
323702799441439,2cyclictest3393839-21kworker/9:2+events12:38:129
323702799441438,2cyclictest3353942-21kworker/9:2+events11:03:159
323702799440439,1cyclictest3393839-21kworker/9:2+events12:33:129
323702799440439,1cyclictest3393839-21kworker/9:2+events12:29:129
323702799440439,1cyclictest3393839-21kworker/9:2+events12:29:119
323702799440439,1cyclictest3393839-21kworker/9:2+events12:04:179
323702799440439,1cyclictest3353942-21kworker/9:2+events11:08:159
323702799440439,1cyclictest3348578-21kworker/9:0+events10:36:159
323702799440439,1cyclictest3338225-21kworker/9:2+events10:32:119
323702799440439,1cyclictest3285224-21kworker/9:1+events09:28:149
323702799440439,1cyclictest3274484-21kworker/9:2+events08:22:149
323702799440439,1cyclictest3263734-21kworker/9:2+events08:01:149
323702799439438,1cyclictest3353942-21kworker/9:2+events10:52:359
323702799439438,1cyclictest3317056-21kworker/9:2+events10:07:199
323702799439438,1cyclictest3288383-21kworker/9:2+events08:55:219
323702799439438,1cyclictest3248620-21kworker/9:2+events07:34:159
323702799439437,2cyclictest3317056-21kworker/9:2+events09:41:469
323699799439439,0cyclictest19-1pr/ttyS009:00:110
323702799438437,1cyclictest3399203-21kworker/9:0+events12:22:569
323702799438437,1cyclictest3380518-21kworker/9:2+events11:42:209
323702799438437,1cyclictest3364691-21kworker/9:0+events11:25:219
323702799438437,1cyclictest3335542-21kworker/9:1+events10:45:209
323702799438437,1cyclictest3335542-21kworker/9:1+events10:17:309
323702799438437,1cyclictest3274484-21kworker/9:2+events08:32:019
323702799438437,1cyclictest3274484-21kworker/9:2+events08:18:189
323702799438436,2cyclictest3372465-21kworker/9:1+events11:45:219
323702799438436,2cyclictest3372465-21kworker/9:1+events11:32:309
323699799438438,0cyclictest574863-21snmpd10:58:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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