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2025-07-01 - 08:12

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 Tue Jul 01, 2025 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2871127473,0sleep00-21swapper/018:44:300
2870427473,0sleep30-21swapper/318:44:253
2840926765,0sleep20-21swapper/218:40:562
2858623324,0sleep10-21swapper/118:42:591
288279977,0cyclictest29037-21sensors19:05:230
28415070,0irq/27-eth0-tx-0-21swapper/223:38:562
339960,0migration/36955-21sh22:11:243
339960,0migration/324384-21sh22:45:163
339960,0migration/31501-21sh20:46:273
339960,0migration/310626-21idleruntime-cro21:14:593
288299960,0cyclictest0-21swapper/219:35:212
288289960,0cyclictest8943-21timerwakeupswit21:10:261
28415060,0irq/27-eth0-tx-0-21swapper/223:43:502
28415060,0irq/27-eth0-tx-0-21swapper/223:26:222
28415060,0irq/27-eth0-tx-0-21swapper/223:18:252
28415060,0irq/27-eth0-tx-0-21swapper/223:09:092
28415060,0irq/27-eth0-tx-0-21swapper/223:01:242
28415060,0irq/27-eth0-tx-0-21swapper/222:44:582
28415060,0irq/27-eth0-tx-0-21swapper/222:30:472
28415060,0irq/27-eth0-tx-0-21swapper/222:29:282
28415060,0irq/27-eth0-tx-0-21swapper/221:56:502
28415060,0irq/27-eth0-tx-0-21swapper/221:46:432
28415060,0irq/27-eth0-tx-0-21swapper/221:44:552
28415060,0irq/27-eth0-tx-0-21swapper/221:39:362
28415060,0irq/27-eth0-tx-0-21swapper/221:25:112
28415060,0irq/27-eth0-tx-0-21swapper/221:22:192
28415060,0irq/27-eth0-tx-0-21swapper/221:22:192
28415060,0irq/27-eth0-tx-0-21swapper/220:55:022
28415060,0irq/27-eth0-tx-0-21swapper/200:01:392
28405060,0irq/26-eth0-rx-27706-21irqcore21:25:163
249960,0watchdog/20-21swapper/222:45:212
249960,0watchdog/20-21swapper/222:06:452
249960,0watchdog/20-21swapper/221:00:092
249960,0watchdog/20-21swapper/220:53:412
8225050,0irq/24-0000:00:19609-21cat20:14:592
4150,0ktimersoftd/00-21swapper/022:47:540
339950,0migration/37258-21latency_hist20:29:593
339950,0migration/36857-21kthreadcore21:30:203
339950,0migration/35835-21taskset20:02:193
339950,0migration/35103-21munin-node19:15:183
339950,0migration/331633-21sh22:29:303
339950,0migration/326492-21kthreadcore19:05:183
339950,0migration/322594-21taskset23:48:503
339950,0migration/320436-21kthreadcore22:20:193
339950,0migration/31911-21kthreadcore19:10:233
339950,0migration/317758-21latency_hist21:39:593
339950,0migration/315580-21kthreadcore19:20:163
339950,0migration/315014-21kthreadcore20:55:203
339950,0migration/314114-21munin-node23:20:123
339950,0migration/313619-21kthreadcore22:15:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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