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2025-11-03 - 20:33

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 Mon Nov 03, 2025 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2526128480,0sleep20-21swapper/206:37:342
2533126867,0sleep10-21swapper/106:38:211
291350350,0irq/25-eth10-21swapper/306:35:333
2531523523,0sleep00-21swapper/006:38:080
28415070,0irq/27-eth0-tx-0-21swapper/211:12:052
28415070,0irq/27-eth0-tx-0-21swapper/211:12:052
8225060,0irq/24-0000:00:26594-21latency_hist07:05:182
8225060,0irq/24-0000:00:0-21swapper/211:15:182
339960,0migration/39132-21sh10:37:303
339960,0migration/34864-21sh09:30:543
339960,0migration/332024-21sh08:46:383
339960,0migration/316438-21sh09:00:253
339960,0migration/313341-21sh11:43:413
28415060,0irq/27-eth0-tx-2430-21munin-node10:35:452
28415060,0irq/27-eth0-tx-0-21swapper/212:06:412
28415060,0irq/27-eth0-tx-0-21swapper/211:52:312
28415060,0irq/27-eth0-tx-0-21swapper/211:45:242
28415060,0irq/27-eth0-tx-0-21swapper/211:38:412
28415060,0irq/27-eth0-tx-0-21swapper/211:28:062
28415060,0irq/27-eth0-tx-0-21swapper/211:04:242
28415060,0irq/27-eth0-tx-0-21swapper/210:57:332
28415060,0irq/27-eth0-tx-0-21swapper/210:42:552
28415060,0irq/27-eth0-tx-0-21swapper/210:32:032
28415060,0irq/27-eth0-tx-0-21swapper/210:15:282
28415060,0irq/27-eth0-tx-0-21swapper/210:13:022
28415060,0irq/27-eth0-tx-0-21swapper/209:51:452
28415060,0irq/27-eth0-tx-0-21swapper/209:47:262
28415060,0irq/27-eth0-tx-0-21swapper/209:09:052
28415060,0irq/27-eth0-tx-0-21swapper/208:58:462
28415060,0irq/27-eth0-tx-0-21swapper/208:47:172
28405060,0irq/26-eth0-rx-9342-21df_abs11:00:323
28405060,0irq/26-eth0-rx-22395-21python11:05:413
28405060,0irq/26-eth0-rx-15820-21perl11:25:313
255689960,0cyclictest31027-21ssh11:12:481
255689960,0cyclictest31027-21ssh11:12:481
255679966,0cyclictest0-21swapper/009:04:170
255679960,0cyclictest17832-21ssh10:21:040
249960,0watchdog/28170-21cut12:00:362
249960,0watchdog/223561-21ssh11:08:482
249960,0watchdog/20-21swapper/209:41:002
149960,0migration/05787-21taskset09:33:510
149960,0migration/020936-21sh11:48:130
339950,0migration/37987-21munin-node09:15:303
339950,0migration/34877-21latency_hist12:00:173
339950,0migration/34069-21kthreadcore06:45:353
339950,0migration/34029-21kthreadcore08:50:373
339950,0migration/331827-21taskset06:40:443
339950,0migration/329924-21taskset09:27:303
339950,0migration/329326-21taskset08:00:013
339950,0migration/328149-21taskset11:51:093
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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