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2026-05-20 - 04:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #8

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 here to display the system's profile data or here to proceed to next system.
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 100 highest latencies:
System rackcslot8s.osadl.org (updated Wed May 20, 2026 00:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2174621490,3sleep09-21ksoftirqd/019:05:200
111391630,30ptp4l0-21swapper/219:05:232
2234026251,6sleep40-21swapper/419:06:534
324102580,0sleep30-21swapper/322:16:413
239252570,0sleep30-21swapper/319:10:203
2235925735,7sleep30-21swapper/319:07:083
111391560,5ptp4l0-21swapper/619:05:416
2245725331,7sleep10-21swapper/119:08:261
2245425342,6sleep70-21swapper/719:08:247
111391510,2ptp4l0-21swapper/519:05:135
111391370,0ptp4l0-21swapper/422:24:154
111391330,0ptp4l0-21swapper/422:12:424
111391330,0ptp4l0-21swapper/023:15:160
111391320,0ptp4l0-21swapper/421:50:204
111391310,0ptp4l0-21swapper/422:38:184
111391310,0ptp4l0-21swapper/422:32:594
111391310,0ptp4l0-21swapper/400:37:394
111391310,0ptp4l0-21swapper/120:55:141
111391310,0ptp4l0-21swapper/020:20:180
111391300,0ptp4l0-21swapper/422:55:534
111391300,0ptp4l0-21swapper/100:36:201
111391300,0ptp4l0-21swapper/021:17:430
111391300,0ptp4l0-21swapper/019:30:190
111391300,0ptp4l0-21swapper/000:34:570
111391290,0ptp4l0-21swapper/423:16:274
111391290,0ptp4l0-21swapper/400:25:134
111391290,0ptp4l0-21swapper/123:23:061
111391290,0ptp4l0-21swapper/100:14:071
111391290,0ptp4l0-21swapper/100:14:071
111391290,0ptp4l0-21swapper/023:02:340
111391290,0ptp4l0-21swapper/022:42:000
111391290,0ptp4l0-21swapper/021:41:240
111391290,0ptp4l0-21swapper/000:05:200
111391290,0ptp4l0-21swapper/000:05:200
111391280,3ptp4l401ktimersoftd/300:17:373
111391280,0ptp4l0-21swapper/423:56:494
111391280,0ptp4l0-21swapper/423:53:494
111391280,0ptp4l0-21swapper/423:00:554
111391280,0ptp4l0-21swapper/422:47:184
111391280,0ptp4l0-21swapper/421:43:404
111391280,0ptp4l0-21swapper/122:55:231
111391280,0ptp4l0-21swapper/122:22:271
111391280,0ptp4l0-21swapper/121:38:281
111391280,0ptp4l0-21swapper/023:09:400
111391280,0ptp4l0-21swapper/022:18:130
111391280,0ptp4l0-21swapper/021:50:490
111391280,0ptp4l0-21swapper/021:48:560
111391270,3ptp4l641ktimersoftd/623:31:296
111391270,0ptp4l32580-21/usr/sbin/munin20:40:184
111391270,0ptp4l0-21swapper/622:16:576
111391270,0ptp4l0-21swapper/423:46:104
111391270,0ptp4l0-21swapper/422:29:324
111391270,0ptp4l0-21swapper/421:22:464
111391270,0ptp4l0-21swapper/122:50:361
111391270,0ptp4l0-21swapper/122:37:351
111391270,0ptp4l0-21swapper/100:23:201
111391270,0ptp4l0-21swapper/023:58:550
111391270,0ptp4l0-21swapper/022:38:290
111391270,0ptp4l0-21swapper/022:33:040
111391270,0ptp4l0-21swapper/022:24:230
111391270,0ptp4l0-21swapper/022:02:180
111391270,0ptp4l0-21swapper/021:11:000
111391270,0ptp4l0-21swapper/000:36:100
111391270,0ptp4l0-21swapper/000:22:570
111391260,2ptp4l0-21swapper/100:19:281
111391260,0ptp4l0-21swapper/522:55:385
111391260,0ptp4l0-21swapper/520:25:145
111391260,0ptp4l0-21swapper/423:35:124
111391260,0ptp4l0-21swapper/423:13:574
111391260,0ptp4l0-21swapper/422:42:514
111391260,0ptp4l0-21swapper/421:48:434
111391260,0ptp4l0-21swapper/419:50:174
111391260,0ptp4l0-21swapper/400:00:134
111391260,0ptp4l0-21swapper/121:11:141
111391260,0ptp4l0-21swapper/023:30:550
111391260,0ptp4l0-21swapper/023:25:190
111391260,0ptp4l0-21swapper/022:51:560
111391260,0ptp4l0-21swapper/021:22:190
111391250,2ptp4l0-21swapper/023:52:350
111391250,1ptp4l909-21diskstats21:35:114
111391250,1ptp4l17955-21irqstats23:25:164
111391250,0ptp4l13627-21diskmemload22:14:151
111391250,0ptp4l0-21swapper/523:15:225
111391250,0ptp4l0-21swapper/521:43:275
111391250,0ptp4l0-21swapper/520:15:125
111391250,0ptp4l0-21swapper/520:05:145
111391250,0ptp4l0-21swapper/423:20:164
111391250,0ptp4l0-21swapper/423:10:004
111391250,0ptp4l0-21swapper/422:01:384
111391250,0ptp4l0-21swapper/421:55:324
111391250,0ptp4l0-21swapper/421:13:424
111391250,0ptp4l0-21swapper/419:40:194
111391250,0ptp4l0-21swapper/400:06:274
111391250,0ptp4l0-21swapper/400:06:274
111391250,0ptp4l0-21swapper/222:16:552
111391250,0ptp4l0-21swapper/121:46:331
111391250,0ptp4l0-21swapper/121:25:011
111391250,0ptp4l0-21swapper/100:03:171
111391250,0ptp4l0-21swapper/023:13:150
111391250,0ptp4l0-21swapper/022:56:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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