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2026-05-11 - 04:51

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 May 11, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25449991023,55cyclictest0-21swapper/120:00:411
25449999943,12cyclictest12224-21crond17:30:121
2545199973,66cyclictest0-21swapper/321:35:143
25450999738,14cyclictest0-21swapper/220:15:572
25450999633,7cyclictest9074-21ssh20:58:302
2545199952,61cyclictest0-21swapper/320:21:353
2545199952,61cyclictest0-21swapper/320:21:353
25450999430,13cyclictest0-21swapper/219:18:492
2545099934,53cyclictest0-21swapper/219:36:062
2545099934,53cyclictest0-21swapper/219:11:072
2545099933,53cyclictest0-21swapper/217:50:132
2544799933,13cyclictest0-21swapper/018:58:000
2544799933,13cyclictest0-21swapper/018:58:000
25450999231,13cyclictest0-21swapper/221:21:072
25450999231,13cyclictest0-21swapper/219:02:132
2545099922,53cyclictest0-21swapper/221:44:352
2545099922,53cyclictest0-21swapper/221:44:352
25447999220,9cyclictest269321telnet18:00:220
25447999220,51cyclictest0-21swapper/019:55:280
2545099914,50cyclictest0-21swapper/220:50:412
2545099913,53cyclictest0-21swapper/218:55:402
2545099913,53cyclictest0-21swapper/218:55:402
25449999121,31cyclictest25701-21df_abs20:35:201
2544999906,48cyclictest0-21swapper/118:55:031
2544799904,10cyclictest2788-21awk20:50:040
2544799903,80cyclictest0-21swapper/021:50:370
2544799903,11cyclictest18194-21kworker/0:219:21:000
25447999021,52cyclictest0-21swapper/017:35:270
25447999018,9cyclictest20495-21df_abs21:15:210
25447999017,8cyclictest9711-21open_files20:10:350
2545099892,55cyclictest0-21swapper/219:43:592
2545099892,55cyclictest0-21swapper/219:43:592
2544799895,77cyclictest0-21swapper/021:30:260
2544799893,26cyclictest0-21swapper/020:55:180
2545099883,48cyclictest1419-21runrttasks19:53:202
25447998822,10cyclictest26577-21munin-run18:00:100
25447998817,12cyclictest0-21swapper/017:10:430
2545099873,51cyclictest0-21swapper/217:10:492
2544799874,24cyclictest0-21swapper/020:50:190
25447998724,43cyclictest148161ssh19:30:330
25447998715,11cyclictest0-21swapper/017:45:270
2545099863,51cyclictest0-21swapper/220:34:122
2544799865,64cyclictest0-21swapper/021:20:370
2544799864,75cyclictest0-21swapper/022:12:360
2544799864,75cyclictest0-21swapper/020:25:410
25447998622,7cyclictest15364-21rm21:06:490
25447998616,13cyclictest0-21swapper/017:20:290
25447998615,10cyclictest121850irq/46-eth019:11:490
25447998611,14cyclictest0-21swapper/021:40:380
25447998611,14cyclictest0-21swapper/021:40:380
2544799853,76cyclictest10391-21ssh19:25:200
2544799853,12cyclictest0-21swapper/019:02:120
25447998525,53cyclictest17908-21gltestperf19:35:280
25447998521,10cyclictest0-21swapper/022:00:300
25447998516,11cyclictest0-21swapper/020:40:350
2545099843,50cyclictest0-21swapper/221:56:012
2544799844,71cyclictest0-21swapper/019:15:350
2544799843,74cyclictest0-21swapper/020:35:320
2544799843,72cyclictest0-21swapper/020:19:370
2544799843,22cyclictest0-21swapper/021:48:060
25447998421,7cyclictest30206-21latency_hist17:00:140
2545099833,49cyclictest0-21swapper/220:00:252
2545099833,49cyclictest0-21swapper/219:10:072
2544799834,72cyclictest0-21swapper/021:10:280
2544799834,72cyclictest0-21swapper/020:20:320
2544799834,72cyclictest0-21swapper/020:20:320
2544799833,73cyclictest0-21swapper/020:00:210
25447998325,42cyclictest27821-21ssh21:25:290
25447998321,8cyclictest1287-21snmpd16:54:390
25447998319,9cyclictest22787-21grep20:30:260
25447998314,12cyclictest0-21swapper/020:05:300
2545099823,50cyclictest0-21swapper/221:33:292
2544799826,70cyclictest0-21swapper/017:30:270
2544799826,70cyclictest0-21swapper/017:30:270
2544799824,71cyclictest0-21swapper/021:35:140
25447998215,9cyclictest27314-21aten_r1power_vo19:50:190
2544799814,71cyclictest0-21swapper/022:18:360
2544799814,70cyclictest0-21swapper/018:52:170
2544799813,71cyclictest0-21swapper/018:35:210
25447998126,49cyclictest0-21swapper/022:05:130
25447998111,65cyclictest22670-21ssh19:42:000
25447998111,65cyclictest22670-21ssh19:42:000
2545099803,51cyclictest0-21swapper/220:14:472
2545099802,49cyclictest0-21swapper/221:28:382
2544799804,70cyclictest0-21swapper/021:57:370
25447998015,11cyclictest0-21swapper/017:15:250
2544799798,15cyclictest0-21swapper/018:05:450
2544799795,65cyclictest0-21swapper/019:08:180
2544799794,12cyclictest0-21swapper/019:46:180
2544799793,69cyclictest0-21swapper/017:25:240
2544799793,23cyclictest0-21swapper/017:40:240
2544799783,68cyclictest10385-21ssh21:00:220
2544799783,68cyclictest10385-21ssh21:00:220
25447997812,13cyclictest0-21swapper/018:20:290
2545099772,48cyclictest0-21swapper/222:08:472
25447997723,10cyclictest1550-21munin-node18:15:270
25447997723,10cyclictest1550-21munin-node18:15:270
2544799769,16cyclictest0-21swapper/017:00:260
25447997619,10cyclictest0-21swapper/018:30:100
25447997612,9cyclictest121850irq/46-eth018:45:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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