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2026-06-08 - 09:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Mon Jun 08, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1323899983,52cyclictest19947-21munin-node21:20:430
13242999216,9cyclictest19663-21crond21:20:303
1323899924,78cyclictest0-21swapper/022:04:320
1323899913,81cyclictest0-21swapper/022:45:000
1324299903,13cyclictest0-21swapper/322:37:033
1323899907,65cyclictest0-21swapper/021:16:170
1323899904,79cyclictest0-21swapper/000:30:230
1323899904,78cyclictest6779-21ssh00:10:480
1323899904,78cyclictest6779-21ssh00:10:480
1323899904,78cyclictest0-21swapper/022:10:410
1323899904,78cyclictest0-21swapper/022:10:410
1323899904,52cyclictest0-21swapper/023:40:370
1323899903,80cyclictest0-21swapper/022:52:130
1323899903,80cyclictest0-21swapper/022:52:130
1323899903,79cyclictest11559-21ssh23:30:450
1323899903,79cyclictest0-21swapper/000:06:450
13238999013,54cyclictest0-21swapper/022:20:570
13242998925,9cyclictest22972-21needreboot20:25:593
13242998918,16cyclictest0-21swapper/319:00:463
1323899894,77cyclictest0-21swapper/021:54:230
1323899893,79cyclictest0-21swapper/021:29:300
1323899893,79cyclictest0-21swapper/021:29:300
1323899893,78cyclictest22390-21munin-node23:45:530
1324299884,32cyclictest0-21swapper/300:15:363
1324299883,35cyclictest0-21swapper/322:05:303
1324299883,26cyclictest0-21swapper/321:23:573
1324299883,12cyclictest0-21swapper/322:53:453
1324299883,12cyclictest0-21swapper/322:53:453
1324299880,9cyclictest2768-21kworker/1:022:30:403
1323899884,77cyclictest0-21swapper/023:05:580
1323899884,77cyclictest0-21swapper/022:36:520
1323899884,77cyclictest0-21swapper/000:16:120
1323899884,76cyclictest0-21swapper/023:16:090
1323899884,66cyclictest0-21swapper/000:02:320
1323899883,78cyclictest0-21swapper/023:39:100
1323899883,77cyclictest0-21swapper/022:07:160
1323899883,77cyclictest0-21swapper/021:31:520
1323899883,76cyclictest0-21swapper/023:51:430
1324299874,24cyclictest0-21swapper/323:00:493
13242998720,9cyclictest7373-21memory21:00:553
1323899874,76cyclictest0-21swapper/022:58:460
1323899873,77cyclictest0-21swapper/021:40:560
1323899873,76cyclictest0-21swapper/023:12:340
1323899873,64cyclictest0-21swapper/021:12:030
1323899873,61cyclictest316401munin-node22:25:500
13242998634,45cyclictest0-21swapper/323:35:543
1323899864,75cyclictest0-21swapper/021:00:440
1323899864,74cyclictest0-21swapper/021:36:150
1323899864,64cyclictest0-21swapper/000:00:240
1323899864,63cyclictest0-21swapper/023:26:150
1323899864,63cyclictest0-21swapper/023:26:150
1323899863,76cyclictest0-21swapper/023:01:160
1323899863,76cyclictest0-21swapper/022:30:550
1323899863,76cyclictest0-21swapper/021:07:040
1323899863,49cyclictest14954-21grep20:10:480
1324299856,34cyclictest0-21swapper/323:20:493
1324299854,12cyclictest0-21swapper/321:39:083
1324299853,30cyclictest1227-21runrttasks22:25:293
1323899854,74cyclictest0-21swapper/020:55:460
1323899854,74cyclictest0-21swapper/019:56:560
1323899854,74cyclictest0-21swapper/019:30:530
1323899854,73cyclictest0-21swapper/023:20:570
1323899854,73cyclictest0-21swapper/019:40:550
1323899853,74cyclictest14076-21sed00:20:560
1323899853,63cyclictest0-21swapper/019:10:560
1324299843,35cyclictest0-21swapper/300:06:003
13242998423,11cyclictest1227-21runrttasks23:40:363
1323899844,62cyclictest0-21swapper/022:18:470
1323899843,74cyclictest0-21swapper/021:49:100
1323899843,72cyclictest5976-21diskmemload22:45:490
1323899842,64cyclictest0-21swapper/020:20:460
1323899842,59cyclictest12581-21ssh21:55:550
1324299834,12cyclictest0-21swapper/321:44:233
13242998331,12cyclictest9857-21unixbench_singl21:51:043
13242998327,10cyclictest3847-21needreboot19:45:593
1324299824,36cyclictest0-21swapper/321:10:473
1324299823,41cyclictest15796-21munin-node00:25:593
13242998224,12cyclictest0-21swapper/300:00:393
13242998218,8cyclictest28427-21timerandwakeup21:31:033
1323899825,69cyclictest0-21swapper/020:40:490
1323899824,71cyclictest0-21swapper/020:51:010
1323899824,69cyclictest1227-21runrttasks20:17:450
1324299813,8cyclictest19270-21latency22:05:523
1324299813,34cyclictest0-21swapper/323:50:423
1324299813,16cyclictest0-21swapper/321:59:203
13242998123,15cyclictest0-21swapper/322:40:463
13242998121,9cyclictest14235-21proc_pri22:45:573
1323899814,70cyclictest0-21swapper/019:27:370
1323899813,59cyclictest9824-21munin-node20:00:440
1324299805,19cyclictest0-21swapper/321:47:503
1324299803,33cyclictest0-21swapper/300:23:213
13242998023,13cyclictest0-21swapper/323:17:073
1323899804,68cyclictest0-21swapper/020:45:570
1323899804,68cyclictest0-21swapper/020:45:570
1323899804,60cyclictest0-21swapper/019:47:400
13242997932,10cyclictest5909-21head19:50:563
1324299793,33cyclictest0-21swapper/321:26:283
1324299793,33cyclictest0-21swapper/321:26:283
1324299793,32cyclictest0-21swapper/320:25:333
1324299793,22cyclictest0-21swapper/323:14:093
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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