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2026-05-17 - 06:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 rackeslot5s.osadl.org (updated Sun May 17, 2026 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1368399280,0cyclictest0-21swapper/122:04:591
13683992720,3cyclictest0-21swapper/100:22:161
1368399270,22cyclictest14757-21cron21:45:011
1368399270,0cyclictest7327-21diskmemload21:47:571
1368399270,0cyclictest0-21swapper/121:15:531
13690992625,1cyclictest0-21swapper/322:43:493
13683992622,4cyclictest7327-21diskmemload23:17:161
1368399260,25cyclictest0-21swapper/121:50:021
1368399260,21cyclictest7327-21diskmemload21:22:251
1368399260,1cyclictest0-21swapper/123:40:401
1368399260,0cyclictest0-21swapper/122:11:081
1368399260,0cyclictest0-21swapper/100:14:171
13680992621,4cyclictest7327-21diskmemload22:58:530
13680992621,4cyclictest7327-21diskmemload00:31:100
13680992620,1cyclictest0-21swapper/023:09:510
1368099260,25cyclictest27236-21smartctl23:22:220
1368099260,21cyclictest9769-21ssh21:40:370
1368099260,1cyclictest10529-21ssh00:03:430
13690992524,0cyclictest2841-21users22:02:293
1369099250,25cyclictest0-21swapper/300:38:163
1369099250,24cyclictest0-21swapper/322:47:243
1368899250,24cyclictest19781-21rm23:15:452
1368899250,24cyclictest0-21swapper/221:30:582
13683992521,3cyclictest0-21swapper/123:54:181
1368399250,24cyclictest0-21swapper/123:48:201
1368399250,24cyclictest0-21swapper/123:28:241
1368399250,21cyclictest0-21swapper/123:23:521
1368399250,21cyclictest0-21swapper/122:57:481
1368399250,21cyclictest0-21swapper/100:25:061
1368399250,0cyclictest7327-21diskmemload22:34:381
1368399250,0cyclictest7327-21diskmemload21:25:141
13680992522,3cyclictest0-21swapper/000:26:340
13680992520,1cyclictest8507-21ssh21:39:130
13680992520,1cyclictest28943-21taskset00:20:350
13680992519,5cyclictest0-21swapper/022:05:030
13680992518,2cyclictest19160-21ssh21:48:240
1368099250,24cyclictest8852-21fschecks_time22:37:220
1368099250,24cyclictest7327-21diskmemload23:58:190
1368099250,24cyclictest0-21swapper/022:42:160
1368099250,24cyclictest0-21swapper/021:19:220
1368099250,21cyclictest7327-21diskmemload22:45:200
1368099250,21cyclictest0-21swapper/022:14:430
1368099250,1cyclictest31902-21ssh22:00:150
1368099250,1cyclictest18595-21ssh23:14:350
13690992423,1cyclictest7327-21diskmemload00:00:153
13690992423,1cyclictest0-21swapper/323:40:183
13690992422,2cyclictest0-21swapper/322:37:243
13690992422,1cyclictest24563-21ssh21:53:093
13690992421,2cyclictest7327-21diskmemload21:47:553
1369099241,22cyclictest9386-21ssh23:06:543
1369099240,23cyclictest3698-21apt-get21:35:023
13688992423,1cyclictest23422-21ssh21:23:462
13688992423,1cyclictest0-21swapper/222:32:192
13688992420,0cyclictest0-21swapper/223:11:232
13688992420,0cyclictest0-21swapper/200:10:372
1368899241,22cyclictest10899-21idleruntime-cro20:10:012
1368899240,23cyclictest7327-21diskmemload21:55:282
1368899240,23cyclictest6039-21sh23:02:422
1368899240,1cyclictest622-21gdbus22:25:002
13683992422,2cyclictest0-21swapper/122:49:081
13683992422,2cyclictest0-21swapper/100:06:431
13683992420,3cyclictest7327-21diskmemload00:03:401
13683992420,3cyclictest0-21swapper/123:08:101
13683992420,3cyclictest0-21swapper/122:40:421
1368399240,24cyclictest0-21swapper/123:56:121
1368399240,24cyclictest0-21swapper/100:38:161
1368399240,23cyclictest28268-21kworker/u8:021:38:571
1368399240,23cyclictest0-21swapper/122:37:331
1368399240,23cyclictest0-21swapper/122:17:001
1368399240,23cyclictest0-21swapper/121:58:391
1368399240,21cyclictest0-21swapper/121:10:031
1368399240,0cyclictest0-21swapper/123:10:191
1368399240,0cyclictest0-21swapper/122:25:141
13680992424,0cyclictest0-21swapper/023:38:350
13680992423,1cyclictest0-21swapper/021:26:470
13680992420,0cyclictest0-21swapper/000:37:510
1368099240,2cyclictest16764-21sh22:15:130
1368099240,23cyclictest7327-21diskmemload00:08:280
1368099240,23cyclictest30912-21ssh23:25:450
1368099240,20cyclictest0-21swapper/021:20:370
1368099240,20cyclictest0-21swapper/000:15:040
1368099240,1cyclictest7327-21diskmemload21:54:160
1368099240,0cyclictest0-21swapper/023:30:270
1368099240,0cyclictest0-21swapper/023:16:430
1368099240,0cyclictest0-21swapper/022:28:120
1368099240,0cyclictest0-21swapper/022:22:230
13690992323,0cyclictest0-21swapper/323:20:023
13690992323,0cyclictest0-21swapper/321:58:143
13690992323,0cyclictest0-21swapper/320:27:203
13690992323,0cyclictest0-21swapper/300:25:213
13690992322,1cyclictest0-21swapper/323:31:093
13690992322,1cyclictest0-21swapper/322:26:313
13690992322,1cyclictest0-21swapper/322:07:193
13690992322,1cyclictest0-21swapper/319:17:193
1369099232,20cyclictest3810-21ssh23:57:513
13690992322,0cyclictest0-21swapper/321:16:413
13690992321,2cyclictest22679-21sh22:20:373
13690992321,1cyclictest7327-21diskmemload23:19:073
1369099231,22cyclictest0-21swapper/300:12:353
1369099231,21cyclictest21161-21ssh23:45:333
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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