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2026-03-11 - 03:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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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Click here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 792 highest latencies:
System rack2slot7s.osadl.org (updated Tue Mar 10, 2026 19:54:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
53326997459,11cyclictest876360-21sort18:10:430
53328996755,8cyclictest291834-21rm17:40:312
53327996252,6cyclictest874646-21wc18:10:381
53327996052,5cyclictest363873-21execl17:50:251
53327996052,5cyclictest363873-21execl17:50:251
53328995546,5cyclictest875901-21multi.sh18:10:422
53328995544,8cyclictest364657-21execl17:50:432
53328995544,8cyclictest364657-21execl17:50:432
53327995547,5cyclictest284978-21sh17:40:011
53327995547,5cyclictest284978-21sh17:40:011
53326995434,16cyclictest0-21swapper/017:50:340
53326995434,16cyclictest0-21swapper/017:50:340
53328995334,16cyclictest802414-21sh18:07:472
53328995334,16cyclictest802414-21sh18:07:472
53327995345,5cyclictest844934-21expr18:09:261
53327995345,5cyclictest844934-21expr18:09:261
53326995345,5cyclictest937832-21systemd-run18:35:010
53328995143,5cyclictest363627-21execl17:50:012
53327994840,5cyclictest319878-21sh17:41:441
53326994838,7cyclictest860552-21sh18:10:050
53326994838,7cyclictest860552-21sh18:10:050
53326994834,11cyclictest340795-21sh17:42:390
5332899473,8cyclictest932726-21ntpq18:15:312
53328994627,16cyclictest0-21swapper/218:04:062
53328994537,5cyclictest284867-21munin-run17:40:012
53328994537,5cyclictest284867-21munin-run17:40:012
5332899433,36cyclictest577-21mta-sts-daemon17:55:332
5332899432,16cyclictest58287-21execl17:20:342
53328994317,23cyclictest56292-21cron17:15:012
53326994333,6cyclictest12450irq/32-eth017:30:320
53328994033,4cyclictest58041-21grep17:20:012
53328994015,22cyclictest59983-21aten_r2power_po17:25:192
53327994030,7cyclictest737261-21spawn18:04:191
53326994035,3cyclictest363624-21execl17:50:020
53328993918,17cyclictest54733-21unixbench_singl17:05:402
53328993911,5cyclictest933855-21fschecks_time18:20:222
5332899391,13cyclictest938708-21ntpq18:35:302
53327993830,5cyclictest363624-21execl17:49:381
53327993830,5cyclictest0-21swapper/117:20:271
5332899374,8cyclictest935806-21ntpq18:25:352
53327993729,5cyclictest58033-21latency_hist17:20:011
53326993630,4cyclictest637999-21spawn18:04:260
53326993628,5cyclictest636-21in:imuxsock17:25:010
53328993512,3cyclictest0-21swapper/217:32:102
53327993529,3cyclictest0-21swapper/117:56:141
53327993526,5cyclictest939305-21munin-plugin-st18:40:011
53326993425,6cyclictest366974-21sendmail18:00:000
53328993322,8cyclictest0-21swapper/218:30:342
53327993325,5cyclictest56300-21Run17:15:011
5332699337,18cyclictest44998-21kworker/u8:0+rpciod17:25:350
53327993224,5cyclictest3606321-21systemd-journal17:05:401
5332799313,25cyclictest1168-21mta-sts-daemon18:20:281
53326993122,7cyclictest1168-21mta-sts-daemon17:37:590
53326993122,7cyclictest1168-21mta-sts-daemon17:37:590
53327993024,3cyclictest0-21swapper/118:20:011
53327993023,4cyclictest1166-21mta-sts-daemon18:25:261
53326993022,6cyclictest936429-21latency_hist18:30:020
53327992923,3cyclictest0-21swapper/117:27:581
53326992923,4cyclictest57751-21grep17:15:410
53326992922,5cyclictest577-21mta-sts-daemon18:20:380
53327992823,2cyclictest0-21swapper/118:35:011
53327992822,3cyclictest0-21swapper/117:30:261
53326992721,4cyclictest3047186-21munin-node17:10:420
53326992718,7cyclictest933232-21unixbench_singl18:15:410
53326992620,3cyclictest0-21swapper/018:40:020
53326992616,8cyclictest54329-21proc_pri17:05:340
53328992418,3cyclictest0-21swapper/217:05:012
53327992318,2cyclictest0-21swapper/117:05:011
53326992214,6cyclictest46513-21kworker/u8:2+rpciod17:05:010
5332999184,7cyclictest0-21swapper/317:40:333
5332999182,9cyclictest0-21swapper/318:10:413
5332999173,7cyclictest0-21swapper/318:05:293
5332999173,7cyclictest0-21swapper/318:05:293
5332999172,8cyclictest0-21swapper/318:00:303
5332999172,8cyclictest0-21swapper/317:45:323
5332999163,4cyclictest0-21swapper/318:35:343
5332999162,8cyclictest0-21swapper/317:50:233
5332999162,8cyclictest0-21swapper/317:50:233
5332999161,6cyclictest0-21swapper/317:55:333
5332999152,5cyclictest0-21swapper/317:15:323
5332999151,6cyclictest0-21swapper/318:25:353
5332999151,6cyclictest0-21swapper/318:15:313
5332999151,5cyclictest0-21swapper/317:05:263
5332999150,6cyclictest0-21swapper/317:30:333
5332999141,6cyclictest0-21swapper/317:35:373
5332999141,6cyclictest0-21swapper/317:35:373
5332999131,7cyclictest0-21swapper/317:20:333
5332999121,6cyclictest0-21swapper/317:25:303
5332999121,5cyclictest0-21swapper/317:10:273
5332999105,3cyclictest0-21swapper/318:30:363
533299995,3cyclictest0-21swapper/318:20:243
533299995,2cyclictest421rcuc/317:05:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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