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2026-04-26 - 09:00

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 Sun Apr 26, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1749821120,7sleep317499-21ls20:19:263
511821100,4sleep05119-21tune2fs18:09:350
54149910034,58cyclictest9607-21crond21:44:083
541499964,18cyclictest956-21fschecks_time19:54:333
5414999534,52cyclictest19342-21grep21:09:283
541499915,12cyclictest0-21swapper/320:55:343
541499914,23cyclictest0-21swapper/319:15:003
541499904,24cyclictest0-21swapper/317:44:453
5414999018,11cyclictest13245-21munin-node21:49:223
5414999015,9cyclictest29249-21ssh19:49:233
541499895,25cyclictest1419-21runrttasks20:25:233
541499894,33cyclictest0-21swapper/320:14:443
541499894,27cyclictest18046-21unixbench_multi18:34:483
541499894,22cyclictest0-21swapper/322:09:403
541499885,75cyclictest0-21swapper/320:29:393
541499884,33cyclictest0-21swapper/320:14:123
5414998830,10cyclictest22347-21cut21:14:233
5414998823,13cyclictest0-21swapper/318:04:173
5414998823,13cyclictest0-21swapper/318:04:173
5414998817,11cyclictest0-21swapper/322:19:273
5414998716,12cyclictest0-21swapper/321:34:203
541499867,21cyclictest0-21swapper/322:06:083
541499865,20cyclictest0-21swapper/320:44:273
541499865,20cyclictest0-21swapper/320:44:273
541499864,27cyclictest0-21swapper/321:26:263
541499864,27cyclictest0-21swapper/321:26:263
541499864,27cyclictest0-21swapper/319:20:213
541499864,27cyclictest0-21swapper/319:20:213
541499864,22cyclictest8893-21munin-node20:04:463
541499864,22cyclictest8893-21munin-node20:04:463
541499864,17cyclictest0-21swapper/320:36:003
541499864,13cyclictest0-21swapper/318:29:443
541499863,30cyclictest21668-21kworker/3:021:29:233
5414998626,9cyclictest6160-21df_abs17:04:353
5414998621,13cyclictest31266-21missed_timers22:14:333
5414998617,13cyclictest0-21swapper/320:54:113
248599860,4rtkit-daemon2484-21rtkit-daemon22:25:440
248599860,4rtkit-daemon2484-21rtkit-daemon19:19:362
248599860,4rtkit-daemon2484-21rtkit-daemon19:19:362
541499855,33cyclictest0-21swapper/321:57:513
541499855,27cyclictest16217-21sh19:29:283
541499855,23cyclictest0-21swapper/322:00:103
541499854,34cyclictest0-21swapper/317:24:193
541499854,27cyclictest0-21swapper/317:29:403
541499854,13cyclictest0-21swapper/321:03:403
5414998525,10cyclictest29984-21unixbench_multi18:59:483
5414998515,12cyclictest0-21swapper/319:35:213
5412998514,62cyclictest0-21swapper/219:49:292
541499844,31cyclictest0-21swapper/322:29:203
541499844,29cyclictest0-21swapper/318:44:443
541499844,28cyclictest0-21swapper/318:24:373
541499844,27cyclictest0-21swapper/318:54:353
541499844,22cyclictest0-21swapper/319:09:573
541499844,12cyclictest0-21swapper/319:44:423
5414998431,45cyclictest7976-21needreboot18:14:413
5414998422,9cyclictest28831-21unixbench_multi17:49:503
5414998419,11cyclictest0-21swapper/320:01:503
5414998419,11cyclictest0-21swapper/320:01:503
541499835,13cyclictest0-21swapper/322:28:403
541499834,13cyclictest0-21swapper/321:48:483
541499833,31cyclictest0-21swapper/317:59:173
5414998326,11cyclictest23190-21gltestperf17:39:383
5412998321,55cyclictest0-21swapper/221:59:262
326582830,3sleep121-21ksoftirqd/122:17:121
541499825,33cyclictest0-21swapper/318:14:173
541499824,33cyclictest0-21swapper/320:43:363
541499824,33cyclictest0-21swapper/320:43:363
541499824,19cyclictest17164-21sshd21:04:533
5412998217,57cyclictest0-21swapper/219:14:262
5412998216,58cyclictest0-21swapper/221:09:402
541499815,12cyclictest0-21swapper/321:19:473
541499814,32cyclictest0-21swapper/319:09:153
541499814,10cyclictest1128-21crond19:29:133
541499813,22cyclictest23511-21ssh19:39:353
5414998122,10cyclictest19394-21fschecks_time18:39:343
5414998122,10cyclictest19394-21fschecks_time18:39:343
5414998121,11cyclictest10020-21gltestperf18:19:353
541499804,26cyclictest0-21swapper/318:49:273
5412997921,49cyclictest0-21swapper/220:06:242
5412997921,49cyclictest0-21swapper/220:06:242
5412997828,42cyclictest1419-21runrttasks21:34:332
5412997811,58cyclictest0-21swapper/219:39:422
5412997722,48cyclictest25933-21aten2.4-expect18:54:272
541499764,21cyclictest0-21swapper/317:14:333
541499764,21cyclictest0-21swapper/317:14:333
5412997619,49cyclictest0-21swapper/219:44:472
5412997614,55cyclictest0-21swapper/217:49:292
541499754,21cyclictest0-21swapper/318:04:293
5412997523,44cyclictest0-21swapper/219:59:362
5412997523,44cyclictest0-21swapper/219:59:362
5412997520,47cyclictest4838-21cpuspeed_turbos22:24:212
5412997518,51cyclictest0-21swapper/221:15:142
541499743,28cyclictest16026-21tail17:24:383
5412997427,39cyclictest12557-21munin-run17:19:192
5412997427,39cyclictest12557-21munin-run17:19:192
5412997424,17cyclictest0-21swapper/220:44:392
5412997424,17cyclictest0-21swapper/220:44:392
5412997423,43cyclictest0-21swapper/221:39:312
5412997421,46cyclictest31123-21df_abs20:39:272
5412997421,46cyclictest31123-21df_abs20:39:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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