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2026-03-30 - 12:31

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 Mar 30, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24971997523,46cyclictest14563-21sendmail_mailtr20:10:051
193302750,3sleep10-21swapper/120:18:541
193512654,13sleep20-21swapper/222:41:002
2497299645,50cyclictest0-21swapper/221:49:452
2497199644,29cyclictest0-21swapper/120:54:541
2497199644,29cyclictest0-21swapper/120:54:541
248599640,7rtkit-daemon0-21swapper/020:19:561
2496499633,52cyclictest0-21swapper/020:29:460
73982627,47sleep00-21swapper/019:59:590
2497299625,48cyclictest9579-21users20:50:082
248599620,7rtkit-daemon0-21swapper/017:29:481
248599620,7rtkit-daemon0-21swapper/017:29:481
2497299615,16cyclictest0-21swapper/219:54:562
2497299614,50cyclictest0-21swapper/220:32:112
248599610,7rtkit-daemon0-21swapper/019:11:071
248599610,5rtkit-daemon2484-21rtkit-daemon22:33:143
228762614,12sleep20-21swapper/222:46:362
166132614,12sleep30-21swapper/322:38:193
2497299603,51cyclictest0-21swapper/221:58:552
24973995929,13cyclictest0-21swapper/320:30:063
24972995928,11cyclictest0-21swapper/222:50:272
2497199595,27cyclictest0-21swapper/119:34:561
2497199595,27cyclictest0-21swapper/119:34:561
2497199594,27cyclictest0-21swapper/122:44:571
24971995921,11cyclictest0-21swapper/121:34:471
24971995921,11cyclictest0-21swapper/121:34:471
248599590,6rtkit-daemon0-21swapper/020:07:041
286052583,48sleep00-21swapper/022:54:560
2497299585,47cyclictest0-21swapper/220:01:222
2497199586,12cyclictest2513-21udisks-daemon22:09:531
24971995833,11cyclictest0-21swapper/122:25:071
2497199583,40cyclictest0-21swapper/119:33:201
236212584,46sleep30-21swapper/319:36:203
236212584,46sleep30-21swapper/319:36:203
24973995729,13cyclictest0-21swapper/321:39:543
24973995729,13cyclictest0-21swapper/321:39:543
2497299574,11cyclictest351-21munin-node19:49:582
24972995724,27cyclictest31423-21basename21:24:442
2497299572,48cyclictest0-21swapper/221:44:432
2497199575,36cyclictest0-21swapper/122:30:271
2497199574,37cyclictest0-21swapper/121:47:521
2497199574,26cyclictest0-21swapper/121:53:251
55152563,45sleep30-21swapper/319:57:363
45582563,46sleep10-21swapper/117:54:141
24973995634,9cyclictest27613-21kworker/3:221:46:423
2497299565,44cyclictest0-21swapper/222:24:492
2497299564,14cyclictest0-21swapper/221:34:532
2497299564,14cyclictest0-21swapper/221:34:532
24972995619,31cyclictest21761-21grep19:34:522
24972995619,31cyclictest21761-21grep19:34:522
2497199565,13cyclictest23175-21taskset21:10:331
2497199564,36cyclictest0-21swapper/121:23:311
24964995631,18cyclictest12950-21grep20:55:140
24964995631,18cyclictest12950-21grep20:55:140
2496499563,37cyclictest0-21swapper/020:35:020
24964995617,24cyclictest28722-21munin-node18:44:580
248599560,5rtkit-daemon31354-21ssh19:49:051
248599560,18rtkit-daemon2484-21rtkit-daemon22:16:373
61272554,13sleep20-21swapper/217:55:082
310092553,46sleep00-21swapper/019:47:580
24973995512,34cyclictest0-21swapper/321:09:483
2497199555,29cyclictest25557-21fschecks_count19:39:531
2497199554,35cyclictest0-21swapper/121:02:561
2497199554,14cyclictest0-21swapper/120:03:581
24971995528,9cyclictest121850irq/46-eth021:39:551
24971995528,9cyclictest121850irq/46-eth021:39:551
24971995524,12cyclictest0-21swapper/122:04:541
24971995523,19cyclictest0-21swapper/120:42:201
24971995511,24cyclictest0-21swapper/122:19:411
24971995511,24cyclictest0-21swapper/122:19:411
2496499553,28cyclictest0-21swapper/021:54:540
248599550,5rtkit-daemon2484-21rtkit-daemon20:39:333
248599550,4rtkit-daemon2484-21rtkit-daemon22:22:443
248599550,4rtkit-daemon2484-21rtkit-daemon22:22:443
248599550,35rtkit-daemon31945-21runrttasks17:42:331
43562543,44sleep00-21swapper/020:44:450
2497299549,24cyclictest4618-21ssh22:19:482
2497299549,24cyclictest4618-21ssh22:19:482
2497299545,43cyclictest0-21swapper/220:13:362
2497199544,33cyclictest0-21swapper/120:37:211
24971995422,13cyclictest0-21swapper/122:34:551
24971995421,13cyclictest0-21swapper/122:54:531
24971995415,24cyclictest0-21swapper/121:16:481
2496499544,46cyclictest0-21swapper/022:43:280
24964995411,25cyclictest0-21swapper/020:40:020
248599540,6rtkit-daemon2484-21rtkit-daemon21:29:463
248599540,5rtkit-daemon2484-21rtkit-daemon20:39:483
118722543,44sleep20-21swapper/221:43:242
118722543,44sleep20-21swapper/221:43:242
286992532,9sleep20-21swapper/221:19:502
269402530,6sleep226939-21cat22:04:512
25382536,41sleep10-21swapper/122:16:041
24973995326,12cyclictest0-21swapper/322:47:073
24973995326,12cyclictest0-21swapper/321:51:083
24973995326,12cyclictest0-21swapper/318:19:403
2497299534,43cyclictest0-21swapper/222:13:472
24972995336,9cyclictest29315-21grep17:35:142
2497199535,29cyclictest0-21swapper/121:29:471
2497199535,29cyclictest0-21swapper/120:49:491
2497199535,27cyclictest28407-21users20:30:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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