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2026-07-25 - 10:25

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 Sat Jul 25, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1874221010,7sleep10-21swapper/121:41:381
83099715,58cyclictest0-21swapper/022:16:450
830996624,36cyclictest13275-21switchtime22:21:470
83099655,52cyclictest0-21swapper/021:26:360
83099655,52cyclictest0-21swapper/021:26:360
203452653,12sleep00-21swapper/018:56:350
83299644,52cyclictest0-21swapper/121:16:401
83099645,51cyclictest0-21swapper/020:21:460
83099644,52cyclictest0-21swapper/022:56:470
73662643,11sleep20-21swapper/221:25:202
83399634,52cyclictest0-21swapper/223:01:472
833996318,29cyclictest0-21swapper/223:15:322
83099635,49cyclictest26783-21crond21:06:180
83099634,52cyclictest2837-21python21:16:490
83499623,50cyclictest12101-21cpuspeed_turbos22:21:293
83299623,54cyclictest0-21swapper/121:57:151
83299623,53cyclictest8748-21date23:06:141
83099625,50cyclictest0-21swapper/023:16:380
83099624,51cyclictest0-21swapper/022:01:310
83099624,51cyclictest0-21swapper/021:56:290
210222623,51sleep10-21swapper/123:23:031
83499614,15cyclictest0-21swapper/323:39:523
83299614,50cyclictest0-21swapper/120:26:541
83099616,48cyclictest0-21swapper/022:36:130
83099615,49cyclictest14984-21diskstats21:36:340
83099615,49cyclictest0-21swapper/022:46:330
83099615,49cyclictest0-21swapper/020:46:310
83099615,49cyclictest0-21swapper/020:46:310
83099614,50cyclictest26018-21diskmemload22:26:300
279592613,11sleep00-21swapper/023:34:310
114972610,6sleep011498-21gltestperf20:41:390
834996033,12cyclictest0-21swapper/323:04:473
833996037,10cyclictest0-21swapper/220:35:382
83299603,50cyclictest1124-21snmpd19:32:221
83099605,48cyclictest0-21swapper/023:01:370
83099605,48cyclictest0-21swapper/021:21:330
83099604,50cyclictest0-21swapper/022:41:460
267932603,50sleep00-21swapper/021:54:240
253062603,12sleep10-21swapper/121:51:391
83499598,26cyclictest0-21swapper/322:56:563
83299594,48cyclictest0-21swapper/120:36:551
83299593,50cyclictest0-21swapper/119:41:551
83099594,49cyclictest0-21swapper/020:56:370
83099594,48cyclictest0-21swapper/023:11:340
83099593,50cyclictest0-21swapper/023:41:280
83099593,50cyclictest0-21swapper/022:51:410
83099593,50cyclictest0-21swapper/020:41:030
83099593,49cyclictest0-21swapper/021:10:570
83099593,49cyclictest0-21swapper/020:53:010
83099593,49cyclictest0-21swapper/020:01:210
83099593,48cyclictest0-21swapper/020:31:360
83099593,48cyclictest0-21swapper/019:27:010
258302593,12sleep30-21swapper/321:02:393
101472594,48sleep30-21swapper/320:40:263
83399584,40cyclictest0-21swapper/223:22:582
83299583,49cyclictest31222-21munin-node20:21:531
83299583,49cyclictest26660-21cstates20:16:351
83299583,47cyclictest31969-21df_abs22:51:301
83099585,47cyclictest0-21swapper/020:16:490
83099585,45cyclictest12499-21processes21:31:460
83099584,48cyclictest0-21swapper/023:36:320
83099584,47cyclictest0-21swapper/023:26:270
83099584,47cyclictest0-21swapper/022:41:140
83099584,47cyclictest0-21swapper/021:47:360
83099584,47cyclictest0-21swapper/019:41:450
83099583,50cyclictest0-21swapper/023:10:410
83099583,48cyclictest0-21swapper/020:11:370
83099583,48cyclictest0-21swapper/018:26:340
327562584,46sleep20-21swapper/222:51:432
270492583,46sleep20-21swapper/221:06:292
224472583,11sleep20-21swapper/221:46:482
834995738,11cyclictest31736-21ps21:11:463
833995713,26cyclictest0-21swapper/222:41:332
83299574,47cyclictest0-21swapper/122:21:271
83299574,47cyclictest0-21swapper/118:42:131
83299573,47cyclictest15726-21ntpq21:36:451
83299573,47cyclictest0-21swapper/122:01:471
83299573,47cyclictest0-21swapper/121:06:361
83099575,45cyclictest0-21swapper/020:26:260
83099574,46cyclictest0-21swapper/022:11:300
83099574,46cyclictest0-21swapper/021:11:510
83099574,43cyclictest0-21swapper/021:41:420
83099573,48cyclictest2741-21gltestperf22:06:350
83099573,47cyclictest0-21swapper/018:16:360
83099573,10cyclictest0-21swapper/023:22:270
83099572,49cyclictest0-21swapper/020:01:420
83099572,49cyclictest0-21swapper/020:01:420
133492573,46sleep20-21swapper/219:46:512
83399566,32cyclictest26018-21diskmemload20:54:032
83399565,35cyclictest0-21swapper/220:41:242
83399564,37cyclictest0-21swapper/221:36:552
833995638,11cyclictest8702-21cpuspeed_turbos18:31:392
83299563,48cyclictest0-21swapper/123:41:431
83299563,48cyclictest0-21swapper/121:51:111
83299563,48cyclictest0-21swapper/119:06:431
83299563,47cyclictest5875-21fschecks_time22:11:341
83299563,47cyclictest0-21swapper/123:17:581
83299563,47cyclictest0-21swapper/122:36:301
83299563,47cyclictest0-21swapper/122:32:451
83299563,47cyclictest0-21swapper/120:31:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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