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2026-08-14 - 08:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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 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 rackbslot8s (updated Fri Aug 14, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23927122149134,10sleep20-21swapper/219:05:432
2392848212192,9sleep60-21swapper/619:07:386
23928312118101,11sleep70-21swapper/719:07:237
23927102116101,10sleep00-21swapper/019:05:400
23929082115101,9sleep10-21swapper/119:08:301
23928382115101,9sleep50-21swapper/519:07:295
2392695211096,9sleep30-21swapper/319:05:273
2392956210894,9sleep40-21swapper/419:09:124
239324299103100,0cyclictest553-21snmpd21:51:071
23932379910398,2cyclictest553-21snmpd21:49:340
2393237991030,102cyclictest0-21swapper/022:59:180
23932619910299,3cyclictest553-21snmpd23:08:256
23932619910299,2cyclictest605-21lldpd23:46:206
2393245991020,100cyclictest0-21swapper/223:37:212
2393245991020,100cyclictest0-21swapper/200:11:182
2393245991020,0cyclictest0-21swapper/222:35:362
23932429910298,1cyclictest553-21snmpd00:26:591
2393242991020,100cyclictest0-21swapper/120:42:311
23932379910299,3cyclictest553-21snmpd21:21:030
2393264991010,100cyclictest0-21swapper/721:33:557
23932619910199,2cyclictest553-21snmpd00:11:156
23932619910197,4cyclictest553-21snmpd21:22:306
2393261991010,101cyclictest0-21swapper/621:48:436
2393261991010,100cyclictest0-21swapper/619:25:376
23932589910199,2cyclictest553-21snmpd00:35:415
23932589910199,1cyclictest553-21snmpd00:28:285
2393258991010,100cyclictest0-21swapper/500:02:035
2393254991010,100cyclictest0-21swapper/421:25:574
23932509910199,2cyclictest553-21snmpd21:33:363
23932459910199,2cyclictest553-21snmpd21:42:382
23932459910199,2cyclictest553-21snmpd20:23:412
2393245991010,99cyclictest0-21swapper/220:27:462
2393245991010,0cyclictest0-21swapper/222:19:262
2393245991010,0cyclictest0-21swapper/222:19:262
23932429910199,2cyclictest2546243-21cat22:30:151
23932429910199,1cyclictest553-21snmpd21:07:201
23932429910199,1cyclictest553-21snmpd19:10:221
2393242991010,100cyclictest0-21swapper/122:29:441
2393242991010,100cyclictest0-21swapper/100:30:151
23932379910199,2cyclictest553-21snmpd19:41:290
2393237991010,100cyclictest0-21swapper/020:28:340
2393237991010,0cyclictest0-21swapper/020:49:360
2393264991000,99cyclictest0-21swapper/721:08:367
2393264991000,100cyclictest0-21swapper/720:11:227
2393264991000,0cyclictest0-21swapper/721:45:257
23932619910099,1cyclictest553-21snmpd00:30:286
23932619910098,2cyclictest553-21snmpd22:28:266
23932619910098,2cyclictest553-21snmpd19:19:266
2393261991000,100cyclictest0-21swapper/622:15:276
2393261991000,100cyclictest0-21swapper/622:15:266
2393261991000,100cyclictest0-21swapper/621:30:096
23932589910099,1cyclictest553-21snmpd23:40:085
23932589910099,1cyclictest553-21snmpd22:58:195
23932589910099,1cyclictest553-21snmpd21:46:325
23932589910099,1cyclictest553-21snmpd21:32:335
23932589910099,1cyclictest553-21snmpd20:48:355
23932589910099,1cyclictest553-21snmpd20:39:435
23932589910098,2cyclictest553-21snmpd23:02:215
23932589910098,2cyclictest553-21snmpd19:52:265
2393258991000,99cyclictest0-21swapper/521:06:265
2393258991000,99cyclictest0-21swapper/519:32:505
2393258991000,100cyclictest0-21swapper/523:10:105
2393258991000,100cyclictest0-21swapper/522:00:585
2393258991000,100cyclictest0-21swapper/500:10:155
23932549910099,1cyclictest553-21snmpd19:19:584
2393254991000,99cyclictest0-21swapper/423:42:304
2393254991000,99cyclictest0-21swapper/421:15:574
2393254991000,99cyclictest0-21swapper/400:37:144
2393254991000,99cyclictest0-21swapper/400:24:394
2393254991000,1cyclictest0-21swapper/422:12:484
2393254991000,100cyclictest0-21swapper/421:50:104
23932509910099,1cyclictest553-21snmpd20:13:123
23932509910099,1cyclictest553-21snmpd00:02:303
23932509910098,2cyclictest553-21snmpd22:42:423
23932459910099,1cyclictest553-21snmpd23:48:502
23932459910099,1cyclictest553-21snmpd19:33:302
23932459910099,1cyclictest553-21snmpd00:00:272
23932459910099,1cyclictest2580204-21cat23:00:132
23932459910099,1cyclictest2467178-21cat21:20:162
23932459910098,2cyclictest553-21snmpd19:45:442
23932459910096,3cyclictest553-21snmpd23:05:162
239324599100100,0cyclictest553-21snmpd21:10:412
2393245991000,99cyclictest0-21swapper/222:28:172
2393245991000,99cyclictest0-21swapper/222:11:472
2393245991000,99cyclictest0-21swapper/221:58:582
2393245991000,1cyclictest0-21swapper/222:45:162
2393245991000,100cyclictest2639877-21ssh23:54:112
23932429910099,1cyclictest553-21snmpd22:39:061
23932429910099,1cyclictest553-21snmpd21:32:031
23932429910099,1cyclictest2647442-21cat00:00:161
2393242991000,99cyclictest0-21swapper/122:09:181
2393242991000,99cyclictest0-21swapper/120:54:411
2393242991000,99cyclictest0-21swapper/120:05:481
2393242991000,99cyclictest0-21swapper/119:49:591
2393242991000,99cyclictest0-21swapper/100:35:151
2393242991000,100cyclictest2454575-21diskmemload21:16:071
2393242991000,100cyclictest0-21swapper/123:41:561
2393242991000,100cyclictest0-21swapper/122:53:331
2393242991000,100cyclictest0-21swapper/120:49:271
2393242991000,100cyclictest0-21swapper/120:19:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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