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2025-12-15 - 12:45

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.

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 highest latencies:
System rack2slot7s.osadl.org (updated Sun Dec 14, 2025 19:55:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
694502996539,23cyclictest1549905-21sh18:11:390
694503996336,5cyclictest1484174-21expr18:09:031
694503996336,5cyclictest1484174-21expr18:09:031
694502996143,15cyclictest1503098-21sh18:09:490
694502996143,15cyclictest1503098-21sh18:09:490
694502995831,24cyclictest930392-21sh17:40:320
694503995646,6cyclictest1520870-21sh18:10:311
694502995326,23cyclictest919882-21multi.sh17:39:510
694504995239,8cyclictest1500725-21sh18:09:402
694504995239,8cyclictest1500725-21sh18:09:402
694503995243,5cyclictest936958-21sh17:40:481
694504995142,5cyclictest952285-21sh17:41:272
694504995040,7cyclictest1421646-21Run18:04:412
694504995038,8cyclictest1557927-21sh18:12:002
694502994922,24cyclictest1373279-21spawn18:04:150
694502994833,11cyclictest12450irq/32-eth017:24:430
694502994833,11cyclictest12450irq/32-eth017:24:430
694502994822,23cyclictest1004585-21execl17:50:020
694502994619,24cyclictest0-21swapper/017:51:020
694502994619,24cyclictest0-21swapper/017:51:020
694504994538,3cyclictest0-21swapper/217:39:512
694504994337,3cyclictest0-21swapper/217:50:022
694502994336,4cyclictest695968-21systemd-run17:10:010
694503994234,5cyclictest1004602-21munin-run17:50:001
694503994231,7cyclictest921398-21sh17:39:581
694502994135,4cyclictest1006580-21Run17:59:190
694502994135,4cyclictest1006580-21Run17:59:190
694502994121,2cyclictest0-21swapper/017:20:000
69450299401,18cyclictest855168-21spawn17:34:450
694504993930,6cyclictest700669-21systemd-run17:25:012
694504993930,6cyclictest700669-21systemd-run17:25:012
69450499391,17cyclictest171rcu_preempt17:19:382
694503993829,6cyclictest1586598-21systemd-run18:25:011
694503993829,6cyclictest1021590-21spawn18:02:521
694503993826,9cyclictest828687-21spawn17:34:471
69450399381,29cyclictest699433-21fstime17:24:431
69450399381,29cyclictest699433-21fstime17:24:431
694504993728,5cyclictest702345-21latency_hist17:30:022
694504993728,5cyclictest564-21dbus-daemon18:30:012
694504993723,8cyclictest828687-21spawn17:34:452
694504993629,3cyclictest0-21swapper/217:50:062
694504993629,3cyclictest0-21swapper/217:50:062
694504993628,5cyclictest1590955-21grep18:40:002
694503993621,10cyclictest1004902-21fstime17:52:061
694503993621,10cyclictest1004902-21fstime17:52:061
694504993523,9cyclictest1588898-21ntp_kernel_err18:34:382
694504993427,5cyclictest694501-21cyclictest17:57:022
694504993427,5cyclictest694501-21cyclictest17:57:022
69450299341,29cyclictest701046-21pipe17:29:390
694502993327,4cyclictest1588033-21cron18:30:010
694503993226,3cyclictest0-21swapper/118:20:011
694503993223,5cyclictest697400-21unixbench17:15:001
694503993223,5cyclictest1006465-21fstime17:57:011
694503993223,5cyclictest1006465-21fstime17:57:011
69450399313,23cyclictest3562023-21cups-browsed18:39:401
69450399302,20cyclictest763-21snmpd18:29:381
694502993023,2cyclictest0-21swapper/018:39:400
694504992821,4cyclictest1584693-21sendmail_mailqu18:19:432
694504992820,5cyclictest696081-21latency_hist17:10:022
694502992821,4cyclictest1584200-21fschecks_time18:19:330
694502992820,6cyclictest1586478-21unixbench_multi18:24:490
694503992720,4cyclictest1168-21mta-sts-daemon18:35:011
694502992721,3cyclictest1589490-21cron18:35:000
694503992620,3cyclictest0-21swapper/117:19:321
694503992619,4cyclictest0-21swapper/117:29:481
694502992620,4cyclictest0-21swapper/017:15:000
694504992519,3cyclictest0-21swapper/217:15:002
694504992518,4cyclictest0-21swapper/218:25:022
694503992418,3cyclictest0-21swapper/117:05:011
694503992317,3cyclictest1168-21mta-sts-daemon17:07:531
69450499189,6cyclictest582-21systemd-logind17:05:012
69450599173,8cyclictest0-21swapper/318:09:433
69450599173,8cyclictest0-21swapper/318:09:433
694502991712,3cyclictest686737-21kworker/u8:2-nfsiod17:05:010
69450599144,6cyclictest0-21swapper/317:57:003
69450599144,6cyclictest0-21swapper/317:57:003
69450599144,6cyclictest0-21swapper/317:50:363
69450599144,6cyclictest0-21swapper/317:50:363
69450599143,6cyclictest0-21swapper/318:01:173
69450599142,7cyclictest0-21swapper/318:10:323
69450599142,6cyclictest0-21swapper/317:39:403
69450599142,5cyclictest0-21swapper/318:29:383
69450599133,6cyclictest0-21swapper/317:41:573
69450599122,6cyclictest0-21swapper/317:48:243
69450599114,5cyclictest0-21swapper/318:39:403
69450599112,5cyclictest0-21swapper/317:33:343
69450599111,5cyclictest0-21swapper/317:26:503
69450599101,6cyclictest0-21swapper/318:19:413
69450599101,5cyclictest0-21swapper/318:21:503
69450599101,5cyclictest0-21swapper/317:14:293
69450599101,3cyclictest0-21swapper/317:24:413
69450599101,3cyclictest0-21swapper/317:24:413
6945059994,3cyclictest0-21swapper/317:09:373
6945059991,5cyclictest0-21swapper/318:34:313
6945059991,5cyclictest0-21swapper/317:05:023
6945059981,5cyclictest0-21swapper/317:19:423
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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