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2026-03-10 - 08:30

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 Tue Mar 10, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291502980,6sleep31583199cyclictest18:13:483
1582799974,85cyclictest0-21swapper/019:03:440
15827999620,57cyclictest4498-21cstates20:28:340
1582799958,80cyclictest0-21swapper/019:59:120
1583199944,24cyclictest0-21swapper/320:40:513
15831999436,50cyclictest0-21swapper/321:19:423
1582799944,83cyclictest0-21swapper/021:32:150
15831999337,49cyclictest21348-21unixbench_singl19:04:023
1582799934,81cyclictest0-21swapper/021:33:290
1582799934,81cyclictest0-21swapper/021:33:290
1582799934,54cyclictest0-21swapper/019:53:220
248599920,18rtkit-daemon0-21swapper/020:59:283
1582799924,80cyclictest0-21swapper/020:33:380
1582799924,69cyclictest0-21swapper/020:24:430
1582799924,55cyclictest0-21swapper/023:03:420
1582799924,50cyclictest0-21swapper/021:23:390
1583199915,22cyclictest0-21swapper/321:08:523
1583199914,39cyclictest29854-21ssh21:53:353
1583199913,9cyclictest121850irq/46-eth022:03:073
1582799915,68cyclictest0-21swapper/023:08:430
1582799914,80cyclictest0-21swapper/022:14:070
1582799914,80cyclictest0-21swapper/022:14:070
1582799914,80cyclictest0-21swapper/020:58:400
1582799905,78cyclictest0-21swapper/020:53:410
1582799905,78cyclictest0-21swapper/020:53:410
1582799904,79cyclictest0-21swapper/021:48:330
1582799904,54cyclictest0-21swapper/020:08:320
1582799904,45cyclictest0-21swapper/022:23:440
248599890,17rtkit-daemon0-21swapper/022:06:333
248599890,17rtkit-daemon0-21swapper/021:35:343
248599890,17rtkit-daemon0-21swapper/021:35:343
1583199894,23cyclictest0-21swapper/320:12:263
1583199894,12cyclictest0-21swapper/320:19:183
15831998930,10cyclictest24025-21gltestperf18:03:443
15831998928,9cyclictest17907-21cut20:48:333
1582799894,77cyclictest0-21swapper/021:13:310
1582799894,64cyclictest0-21swapper/021:38:360
1582799893,80cyclictest0-21swapper/022:53:290
1582799893,80cyclictest0-21swapper/022:53:290
1582799893,79cyclictest0-21swapper/022:43:410
1582799893,78cyclictest0-21swapper/018:58:390
15827998913,53cyclictest28532-21ssh22:38:460
1583199884,26cyclictest0-21swapper/323:15:483
1583199884,24cyclictest0-21swapper/321:50:343
15831998811,14cyclictest0-21swapper/321:03:443
1582799884,77cyclictest0-21swapper/022:33:330
1582799884,77cyclictest0-21swapper/021:44:270
1582799884,77cyclictest0-21swapper/021:08:370
1582799884,77cyclictest0-21swapper/020:03:530
1582799884,76cyclictest0-21swapper/022:48:300
1582799884,76cyclictest0-21swapper/022:18:270
1582799884,76cyclictest0-21swapper/022:18:270
1582799884,76cyclictest0-21swapper/020:18:450
1582799884,76cyclictest0-21swapper/020:13:350
1582799884,76cyclictest0-21swapper/020:13:350
1582799883,9cyclictest18478-21gltestperf20:48:390
76972870,13sleep2281ktimersoftd/221:20:082
1583199873,32cyclictest368-21aten_r1power_fr18:23:373
1583199873,24cyclictest1287-21snmpd22:35:413
15831998726,12cyclictest0-21swapper/320:08:153
1582799874,77cyclictest0-21swapper/022:03:330
1582799874,76cyclictest0-21swapper/020:43:420
1582799874,75cyclictest0-21swapper/023:15:350
1582799874,69cyclictest0-21swapper/021:03:400
1582799874,66cyclictest0-21swapper/020:38:310
1582799874,53cyclictest0-21swapper/023:01:290
1582799874,53cyclictest0-21swapper/023:01:290
1583199865,39cyclictest0-21swapper/322:44:143
1583199865,19cyclictest14773-21yum-updatesd-he21:31:443
1583199864,24cyclictest0-21swapper/318:48:363
1583199864,24cyclictest0-21swapper/318:48:363
15831998626,10cyclictest1350-21aten_r1power_po22:48:273
15831998614,12cyclictest8404-21cpuspeed_turbos22:58:273
15831998614,12cyclictest8404-21cpuspeed_turbos22:58:273
1582799864,76cyclictest0-21swapper/022:00:260
1582799864,75cyclictest0-21swapper/021:18:490
1582799864,75cyclictest0-21swapper/018:36:280
1582799863,65cyclictest0-21swapper/022:11:590
1582799863,59cyclictest27099-21cpuspeed_turbos19:18:360
1583199854,36cyclictest0-21swapper/322:28:283
1583199854,27cyclictest0-21swapper/320:13:353
1583199854,27cyclictest0-21swapper/320:13:353
1583199854,25cyclictest0-21swapper/318:00:383
15831998522,22cyclictest0-21swapper/321:24:463
1583199845,33cyclictest0-21swapper/318:18:523
1583199844,27cyclictest0-21swapper/320:35:223
1583199844,27cyclictest0-21swapper/320:28:373
1583199844,27cyclictest0-21swapper/319:13:433
1583199844,26cyclictest0-21swapper/322:22:153
1583199844,26cyclictest0-21swapper/322:22:153
1583199844,26cyclictest0-21swapper/319:55:183
1583199844,24cyclictest0-21swapper/319:10:073
1583199844,12cyclictest0-21swapper/322:08:343
1583199843,23cyclictest18893-21taskset22:24:273
1582799844,73cyclictest0-21swapper/019:28:230
1582799844,51cyclictest0-21swapper/022:29:080
1582799844,12cyclictest0-21swapper/018:03:370
1582799843,9cyclictest0-21swapper/018:15:380
1582799843,10cyclictest0-21swapper/021:55:230
1583199834,33cyclictest0-21swapper/323:05:453
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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