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2026-08-06 - 21:55

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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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Thu Aug 06, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18668991004,36cyclictest0-21swapper/009:59:580
1866899974,26cyclictest10663-21ssh09:39:520
1866899953,85cyclictest0-21swapper/009:37:180
1866899944,26cyclictest0-21swapper/010:10:040
1866899943,27cyclictest22310-21ssh09:58:180
1866899925,29cyclictest0-21swapper/011:07:170
1866899924,31cyclictest0-21swapper/008:29:350
1866899924,26cyclictest0-21swapper/008:44:490
1866899924,24cyclictest8533-21python10:25:000
18668999220,10cyclictest107550irq/46-eth009:29:320
1866899915,33cyclictest0-21swapper/009:05:000
1866899915,33cyclictest0-21swapper/008:05:020
1866899915,21cyclictest27083-21hddtemp_smartct10:04:510
1866899914,11cyclictest0-21swapper/008:36:550
324752900,9chrt1867799cyclictest08:34:533
1866899905,12cyclictest1227-21runrttasks11:21:340
18668999035,45cyclictest16797-21cat07:05:090
18668999027,19cyclictest4723-21tr11:09:390
1866899895,27cyclictest0-21swapper/009:50:070
1866899894,31cyclictest12472-21ssh08:54:440
1866899894,29cyclictest0-21swapper/011:27:370
1866899894,28cyclictest0-21swapper/007:54:350
1866899894,28cyclictest0-21swapper/007:19:530
1866899894,23cyclictest0-21swapper/008:09:560
1866899894,23cyclictest0-21swapper/008:09:560
1866899894,13cyclictest0-21swapper/009:19:470
1866899894,13cyclictest0-21swapper/006:48:500
1866899894,13cyclictest0-21swapper/006:48:500
18668998921,15cyclictest0-21swapper/009:12:380
18668998917,10cyclictest9771-21ssh08:49:510
18668998917,10cyclictest9771-21ssh08:49:510
18668998916,13cyclictest0-21swapper/011:00:110
18668998914,13cyclictest0-21swapper/009:44:500
1866899884,76cyclictest0-21swapper/008:20:240
1866899884,31cyclictest4155-21gltestperf06:39:580
1866899884,13cyclictest0-21swapper/011:29:440
1866899884,11cyclictest1227-21runrttasks10:18:560
1866899884,11cyclictest1227-21runrttasks10:18:560
1866899883,34cyclictest0-21swapper/008:41:200
18668998823,11cyclictest9460-21grep11:15:000
18668998820,12cyclictest0-21swapper/010:21:520
1866899875,74cyclictest0-21swapper/010:34:470
1866899874,34cyclictest0-21swapper/008:14:470
1866899874,28cyclictest0-21swapper/006:25:020
18668998728,11cyclictest29386-21kernelversion08:29:570
18668998726,13cyclictest1227-21runrttasks10:54:410
18668998726,13cyclictest1227-21runrttasks10:54:410
18668998725,10cyclictest25281-21ssh10:50:040
18668998714,13cyclictest0-21swapper/009:33:510
18668998714,13cyclictest0-21swapper/009:33:510
1866899864,33cyclictest0-21swapper/010:39:480
1866899864,28cyclictest0-21swapper/007:15:100
1866899864,24cyclictest0-21swapper/009:14:570
1866899863,23cyclictest0-21swapper/010:44:420
1866899855,31cyclictest0-21swapper/010:29:400
1866899854,31cyclictest0-21swapper/006:04:530
1866899854,31cyclictest0-21swapper/006:04:530
1866899854,13cyclictest0-21swapper/006:35:070
1866899853,36cyclictest0-21swapper/006:19:400
18668998522,12cyclictest0-21swapper/009:03:140
18668998419,12cyclictest0-21swapper/006:13:350
1866899837,21cyclictest0-21swapper/006:54:390
1866899834,23cyclictest11426-21ssh08:04:350
1866899824,27cyclictest0-21swapper/007:29:590
1866899824,27cyclictest0-21swapper/007:29:590
1866899823,38cyclictest0-21swapper/006:20:450
1866899816,19cyclictest0-21swapper/006:59:390
1866899814,26cyclictest0-21swapper/007:09:540
1866899814,24cyclictest0-21swapper/007:24:480
1866899807,27cyclictest0-21swapper/007:37:570
1866899805,24cyclictest0-21swapper/006:54:500
219499790,4rtkit-daemon2193-21rtkit-daemon11:19:371
1866899794,23cyclictest0-21swapper/007:54:480
1866899764,31cyclictest0-21swapper/007:44:580
160262740,13sleep21867699cyclictest11:25:002
193342720,3sleep1201ktimersoftd/109:04:461
1867699718,56cyclictest0-21swapper/208:38:462
18676997118,45cyclictest23568-21cut09:59:482
18676997116,34cyclictest25763-21ssh09:14:442
18676997017,45cyclictest9422-21grep11:15:002
18676996917,43cyclictest30874-21telnet06:29:482
1867699674,54cyclictest0-21swapper/210:45:362
18676996719,40cyclictest21054-21ssh09:55:002
18676996716,43cyclictest0-21swapper/207:39:512
1867499674,56cyclictest0-21swapper/110:49:541
18677996622,27cyclictest5856-21sendmail_mailqu11:09:553
18676996615,29cyclictest9758-21df_abs08:49:502
18676996615,29cyclictest9758-21df_abs08:49:502
18676996614,33cyclictest4372-21munin-node11:09:362
1867499664,44cyclictest0-21swapper/108:45:411
18674996612,41cyclictest0-21swapper/110:48:401
3382650,4sleep2419-21basename10:14:432
3382650,4sleep2419-21basename10:14:432
1867699654,53cyclictest0-21swapper/209:30:042
1867699654,53cyclictest0-21swapper/209:30:042
18676996519,38cyclictest11977-21cat10:30:012
18676996517,28cyclictest13719-21grep09:44:492
18676996515,42cyclictest14910-21ssh10:34:552
1867499654,48cyclictest0-21swapper/108:07:461
1867499653,43cyclictest0-21swapper/108:10:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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