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2025-07-20 - 05:09

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 Sun Jul 20, 2025 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
658625453,0sleep20-21swapper/218:41:332
648724940,0sleep30-21swapper/318:40:253
669723623,0sleep00-21swapper/018:42:430
650623324,0sleep10-21swapper/118:40:391
69059984,0cyclictest6445-21snmpd21:49:521
69059970,0cyclictest0-21swapper/123:04:481
8225060,0irq/24-0000:00:0-21swapper/221:04:162
69059966,0cyclictest0-21swapper/119:19:401
69039960,0cyclictest0-21swapper/022:02:120
69039960,0cyclictest0-21swapper/021:43:450
339960,0migration/34252-21sh21:03:173
339960,0migration/325149-21sh22:19:013
339960,0migration/322991-21sh22:57:403
339960,0migration/320900-21munin-node21:34:363
339960,0migration/319278-21sh21:10:363
339960,0migration/312542-21sh20:48:023
28415060,0irq/27-eth0-tx-0-21swapper/223:56:092
28415060,0irq/27-eth0-tx-0-21swapper/223:51:132
28415060,0irq/27-eth0-tx-0-21swapper/223:43:332
28415060,0irq/27-eth0-tx-0-21swapper/223:35:332
28415060,0irq/27-eth0-tx-0-21swapper/223:23:272
28415060,0irq/27-eth0-tx-0-21swapper/222:51:232
28415060,0irq/27-eth0-tx-0-21swapper/222:39:372
28415060,0irq/27-eth0-tx-0-21swapper/222:39:372
28415060,0irq/27-eth0-tx-0-21swapper/222:26:322
28415060,0irq/27-eth0-tx-0-21swapper/222:10:552
28415060,0irq/27-eth0-tx-0-21swapper/222:06:482
28415060,0irq/27-eth0-tx-0-21swapper/222:00:352
28415060,0irq/27-eth0-tx-0-21swapper/221:41:582
28415060,0irq/27-eth0-tx-0-21swapper/221:29:312
28415060,0irq/27-eth0-tx-0-21swapper/221:25:402
28415060,0irq/27-eth0-tx-0-21swapper/220:50:292
28405060,0irq/26-eth0-rx-30459-21perl23:44:343
28405060,0irq/26-eth0-rx-19530-21awk21:54:333
249960,0watchdog/23471-21irqcore19:29:352
249960,0watchdog/2245982sleep222:17:142
249960,0watchdog/20-21swapper/222:54:262
249960,0watchdog/20-21swapper/219:26:112
149960,0migration/07537-21needreboot22:04:420
149960,0migration/030770-21gltestperf20:14:300
149960,0migration/012055-21sh21:07:490
69069955,0cyclictest0-21swapper/223:44:392
69059950,0cyclictest0-21swapper/123:45:011
69059950,0cyclictest0-21swapper/100:13:141
69039955,0cyclictest0-21swapper/023:51:460
69039955,0cyclictest0-21swapper/023:44:310
69039950,0cyclictest0-21swapper/020:55:020
339950,0migration/36216-21timerwakeupswit22:44:433
339950,0migration/36033-21irqcore21:04:353
339950,0migration/3468-21kthreadcore19:49:353
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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