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2025-07-04 - 02:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 50 highest latencies:
System rack1slot2s.osadl.org (updated Fri Jul 04, 2025 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
849829893,0sleep00-21swapper/018:43:560
843926665,0sleep30-21swapper/318:43:153
828023122,0sleep10-21swapper/118:41:251
837522622,0sleep20-21swapper/218:42:262
86499976,0cyclictest8088-21ps20:45:110
339970,0migration/34174-21sh22:43:593
86519965,0cyclictest14625-21cut22:10:062
86519960,0cyclictest0-21swapper/221:05:142
86499960,0cyclictest0-21swapper/023:49:550
86499960,0cyclictest0-21swapper/023:09:050
339960,0migration/34906-21sh22:02:413
339960,0migration/327467-21sh22:57:163
339960,0migration/327273-21sh23:18:063
339960,0migration/32504-21gltestperf00:05:083
339960,0migration/320896-21munin-node21:10:153
339960,0migration/320775-21sh21:50:443
339960,0migration/316115-21sh00:11:213
28415060,0irq/27-eth0-tx-18249-21ssh23:31:252
28415060,0irq/27-eth0-tx-10778-21munin-node23:50:102
28415060,0irq/27-eth0-tx-0-21swapper/223:49:272
28415060,0irq/27-eth0-tx-0-21swapper/223:43:442
28415060,0irq/27-eth0-tx-0-21swapper/223:38:502
28415060,0irq/27-eth0-tx-0-21swapper/223:28:282
28415060,0irq/27-eth0-tx-0-21swapper/223:16:422
28415060,0irq/27-eth0-tx-0-21swapper/223:01:172
28415060,0irq/27-eth0-tx-0-21swapper/222:57:092
28415060,0irq/27-eth0-tx-0-21swapper/222:50:032
28415060,0irq/27-eth0-tx-0-21swapper/222:44:402
28415060,0irq/27-eth0-tx-0-21swapper/222:27:212
28415060,0irq/27-eth0-tx-0-21swapper/222:07:302
28415060,0irq/27-eth0-tx-0-21swapper/222:02:162
28415060,0irq/27-eth0-tx-0-21swapper/221:55:582
28415060,0irq/27-eth0-tx-0-21swapper/221:38:392
28415060,0irq/27-eth0-tx-0-21swapper/221:31:152
28415060,0irq/27-eth0-tx-0-21swapper/221:27:502
28415060,0irq/27-eth0-tx-0-21swapper/221:23:032
28415060,0irq/27-eth0-tx-0-21swapper/220:45:582
28405060,0irq/26-eth0-rx-21056-21timerwakeupswit20:50:173
259960,0migration/211026-21sh22:45:282
249960,0watchdog/222524-21ssh20:53:582
249960,0watchdog/221618-21grep23:55:102
249960,0watchdog/221618-21grep23:55:102
249960,0watchdog/20-21swapper/222:22:142
149960,0migration/03916-21ksmtuned22:21:260
86509955,0cyclictest4301-40yum-updatesd-he22:23:221
86509955,0cyclictest0-21swapper/122:01:371
86509954,0cyclictest19105-21cut20:05:071
86509950,0cyclictest0-21swapper/123:35:161
86499955,0cyclictest6766-21diskmemload23:44:330
86499955,0cyclictest0-21swapper/023:47:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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