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2026-06-15 - 17:38

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 Mon Jun 15, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391750,5ptp4l0-21swapper/219:05:132
111391680,2ptp4l27286-21taskset19:05:166
111391600,6ptp4l0-21swapper/019:07:020
229952590,1sleep30-21swapper/321:14:373
58192580,0sleep20-21swapper/220:40:002
111391580,5ptp4l0-21swapper/419:08:544
1881915633,7phc2sys0-21swapper/519:08:055
2824325432,7sleep70-21swapper/719:09:407
2805525127,7sleep30-21swapper/319:07:123
2798525038,7sleep10-21swapper/119:06:211
111391340,0ptp4l0-21swapper/023:02:150
111391320,0ptp4l19313-21diskmemload00:01:304
111391320,0ptp4l0-21swapper/122:19:201
111391320,0ptp4l0-21swapper/023:33:330
111391320,0ptp4l0-21swapper/023:25:480
111391320,0ptp4l0-21swapper/022:56:080
111391300,0ptp4l0-21swapper/123:04:051
111391300,0ptp4l0-21swapper/121:50:151
111391300,0ptp4l0-21swapper/022:49:030
111391300,0ptp4l0-21swapper/022:40:170
111391300,0ptp4l0-21swapper/022:10:100
111391300,0ptp4l0-21swapper/021:45:020
111391290,3ptp4l0-21swapper/122:49:361
111391290,0ptp4l0-21swapper/522:31:385
111391290,0ptp4l0-21swapper/522:16:035
111391290,0ptp4l0-21swapper/500:13:165
111391290,0ptp4l0-21swapper/421:52:404
111391290,0ptp4l0-21swapper/421:38:414
111391290,0ptp4l0-21swapper/023:43:520
111391290,0ptp4l0-21swapper/021:26:360
111391280,0ptp4l0-21swapper/500:30:585
111391280,0ptp4l0-21swapper/422:00:044
111391280,0ptp4l0-21swapper/123:25:051
111391280,0ptp4l0-21swapper/122:43:341
111391280,0ptp4l0-21swapper/121:14:191
111391280,0ptp4l0-21swapper/100:09:591
111391280,0ptp4l0-21swapper/022:35:470
111391280,0ptp4l0-21swapper/021:15:320
111391270,0ptp4l0-21swapper/523:54:155
111391270,0ptp4l0-21swapper/423:55:034
111391270,0ptp4l0-21swapper/423:42:254
111391270,0ptp4l0-21swapper/422:54:354
111391270,0ptp4l0-21swapper/422:48:254
111391270,0ptp4l0-21swapper/422:37:504
111391270,0ptp4l0-21swapper/422:06:464
111391270,0ptp4l0-21swapper/400:14:094
111391270,0ptp4l0-21swapper/123:21:571
111391270,0ptp4l0-21swapper/123:05:141
111391270,0ptp4l0-21swapper/123:05:141
111391270,0ptp4l0-21swapper/120:30:171
111391270,0ptp4l0-21swapper/120:30:171
111391270,0ptp4l0-21swapper/100:00:361
111391270,0ptp4l0-21swapper/022:18:470
111391270,0ptp4l0-21swapper/021:31:020
111391260,3ptp4l101ktimersoftd/019:55:180
111391260,0ptp4l0-21swapper/623:36:026
111391260,0ptp4l0-21swapper/523:05:145
111391260,0ptp4l0-21swapper/523:05:145
111391260,0ptp4l0-21swapper/521:45:155
111391260,0ptp4l0-21swapper/520:25:135
111391260,0ptp4l0-21swapper/421:10:354
111391260,0ptp4l0-21swapper/123:58:521
111391260,0ptp4l0-21swapper/123:17:361
111391260,0ptp4l0-21swapper/100:24:031
111391260,0ptp4l0-21swapper/023:54:520
111391260,0ptp4l0-21swapper/022:02:380
111391260,0ptp4l0-21swapper/000:08:390
111391260,0ptp4l0-21swapper/000:01:230
111391250,1ptp4l23150-21crond21:15:000
111391250,0ptp4l0-21swapper/723:23:327
111391250,0ptp4l0-21swapper/523:10:195
111391250,0ptp4l0-21swapper/523:10:185
111391250,0ptp4l0-21swapper/520:35:135
111391250,0ptp4l0-21swapper/423:47:204
111391250,0ptp4l0-21swapper/423:32:404
111391250,0ptp4l0-21swapper/422:59:134
111391250,0ptp4l0-21swapper/422:25:004
111391250,0ptp4l0-21swapper/422:12:554
111391250,0ptp4l0-21swapper/421:47:464
111391250,0ptp4l0-21swapper/100:30:211
111391250,0ptp4l0-21swapper/023:13:420
111391250,0ptp4l0-21swapper/023:13:410
111391250,0ptp4l0-21swapper/021:53:000
111391250,0ptp4l0-21swapper/021:41:420
111391250,0ptp4l0-21swapper/021:22:580
111391250,0ptp4l0-21swapper/020:50:000
111391250,0ptp4l0-21swapper/000:40:000
111391250,0ptp4l0-21swapper/000:34:350
111391240,2ptp4l0-21swapper/123:50:051
111391240,1ptp4l799-21NetworkManager23:18:310
111391240,1ptp4l752-21irqstats23:40:161
111391240,1ptp4l25818-21timerandwakeup20:10:180
111391240,1ptp4l19804-21/usr/sbin/munin00:05:224
111391240,1ptp4l19313-21diskmemload21:55:111
111391240,0ptp4l7624-21idleruntime00:35:134
111391240,0ptp4l19313-21diskmemload22:09:210
111391240,0ptp4l0-21swapper/521:32:155
111391240,0ptp4l0-21swapper/521:00:165
111391240,0ptp4l0-21swapper/423:18:354
111391240,0ptp4l0-21swapper/422:40:204
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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