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2026-04-16 - 03:08

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 Thu Apr 16, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1373421100,3sleep341-21ksoftirqd/319:05:143
291022640,0sleep40-21swapper/422:25:174
111391630,6ptp4l0-21swapper/019:07:590
111391600,6ptp4l0-21swapper/119:09:401
1508325949,6sleep20-21swapper/219:07:232
1501125949,6sleep40-21swapper/419:06:284
1338725735,6sleep70-21swapper/719:05:117
253482560,0sleep00-21swapper/022:20:160
1338625533,7sleep60-21swapper/619:05:106
53182540,0sleep10-21swapper/122:38:431
1497424736,7sleep50-21swapper/519:05:585
111391360,0ptp4l0-21swapper/000:00:110
111391330,0ptp4l30142-21diskstats20:50:110
111391310,0ptp4l0-21swapper/422:11:184
111391310,0ptp4l0-21swapper/019:35:220
111391300,0ptp4l0-21swapper/520:30:185
111391300,0ptp4l0-21swapper/519:50:135
111391300,0ptp4l0-21swapper/023:05:390
111391300,0ptp4l0-21swapper/021:42:560
111391290,0ptp4l0-21swapper/523:26:265
111391290,0ptp4l0-21swapper/522:35:205
111391290,0ptp4l0-21swapper/521:11:565
111391290,0ptp4l0-21swapper/500:27:345
111391290,0ptp4l0-21swapper/419:15:134
111391290,0ptp4l0-21swapper/023:58:330
111391290,0ptp4l0-21swapper/023:13:360
111391280,2ptp4l0-21swapper/421:54:234
111391280,1ptp4l2516-21/usr/sbin/munin21:00:140
111391280,1ptp4l1028-21sh00:04:285
111391280,0ptp4l6318-21diskmemload23:18:220
111391280,0ptp4l0-21swapper/521:16:215
111391280,0ptp4l0-21swapper/022:57:320
111391280,0ptp4l0-21swapper/022:49:540
111391280,0ptp4l0-21swapper/022:40:020
111391280,0ptp4l0-21swapper/022:36:230
111391280,0ptp4l0-21swapper/022:09:520
111391280,0ptp4l0-21swapper/021:58:460
111391280,0ptp4l0-21swapper/019:25:110
111391270,4ptp4l0-21swapper/023:27:570
111391270,2ptp4l0-21swapper/023:33:240
111391270,0ptp4l0-21swapper/500:30:165
111391270,0ptp4l0-21swapper/423:57:014
111391270,0ptp4l0-21swapper/423:51:224
111391270,0ptp4l0-21swapper/423:42:074
111391270,0ptp4l0-21swapper/423:36:354
111391270,0ptp4l0-21swapper/422:48:224
111391270,0ptp4l0-21swapper/422:21:214
111391270,0ptp4l0-21swapper/421:16:294
111391270,0ptp4l0-21swapper/400:25:034
111391270,0ptp4l0-21swapper/400:19:154
111391270,0ptp4l0-21swapper/123:45:471
111391270,0ptp4l0-21swapper/123:01:371
111391270,0ptp4l0-21swapper/121:47:301
111391270,0ptp4l0-21swapper/023:24:130
111391270,0ptp4l0-21swapper/021:39:060
111391270,0ptp4l0-21swapper/021:17:580
111391270,0ptp4l0-21swapper/000:24:360
111391260,0ptp4l0-21swapper/523:45:505
111391260,0ptp4l0-21swapper/523:12:235
111391260,0ptp4l0-21swapper/522:29:135
111391260,0ptp4l0-21swapper/521:28:525
111391260,0ptp4l0-21swapper/422:57:134
111391260,0ptp4l0-21swapper/422:43:024
111391260,0ptp4l0-21swapper/422:36:174
111391260,0ptp4l0-21swapper/422:01:554
111391260,0ptp4l0-21swapper/421:46:364
111391260,0ptp4l0-21swapper/421:35:124
111391260,0ptp4l0-21swapper/400:34:134
111391260,0ptp4l0-21swapper/023:52:000
111391260,0ptp4l0-21swapper/022:02:030
111391260,0ptp4l0-21swapper/021:10:150
111391260,0ptp4l0-21swapper/020:45:170
111391250,2ptp4l0-21swapper/523:34:285
111391250,1ptp4l2580-21expr19:50:101
111391250,1ptp4l21486-21diskstats21:30:134
111391250,1ptp4l16632-21latency_hist22:55:015
111391250,1ptp4l16632-21latency_hist22:55:015
111391250,1ptp4l0-21swapper/421:20:284
111391250,0ptp4l0-21swapper/523:50:175
111391250,0ptp4l0-21swapper/522:31:455
111391250,0ptp4l0-21swapper/520:35:205
111391250,0ptp4l0-21swapper/423:25:024
111391250,0ptp4l0-21swapper/423:08:394
111391250,0ptp4l0-21swapper/420:10:194
111391250,0ptp4l0-21swapper/420:10:184
111391250,0ptp4l0-21swapper/123:54:471
111391250,0ptp4l0-21swapper/123:09:231
111391250,0ptp4l0-21swapper/122:00:141
111391250,0ptp4l0-21swapper/023:40:480
111391250,0ptp4l0-21swapper/022:27:000
111391250,0ptp4l0-21swapper/022:11:180
111391250,0ptp4l0-21swapper/021:00:000
111391250,0ptp4l0-21swapper/000:08:460
111391240,2ptp4l0-21swapper/023:03:120
111391240,1ptp4l31243-21diskstats23:15:124
111391240,1ptp4l25416-21ps22:20:175
111391240,0ptp4l0-21swapper/523:57:365
111391240,0ptp4l0-21swapper/523:00:145
111391240,0ptp4l0-21swapper/521:53:045
111391240,0ptp4l0-21swapper/521:43:395
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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