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2025-09-19 - 01:10

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 Thu Sep 18, 2025 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
834423824,0sleep00-21swapper/006:38:220
828323627,0sleep30-21swapper/306:37:413
860423430,0sleep20-21swapper/206:41:242
841123329,0sleep10-21swapper/106:39:071
249970,0watchdog/222026-21ssh09:31:472
87269966,0cyclictest6991-21diskmemload08:50:291
87249960,0cyclictest0-21swapper/010:42:290
8225060,0irq/24-0000:00:10706-21munin-run07:32:002
339960,0migration/39095-21kthreadcore11:22:183
339960,0migration/33908-21sh10:38:433
339960,0migration/321768-21sh09:30:583
339960,0migration/320134-21sh10:48:563
339960,0migration/312963-21sh09:45:123
339960,0migration/311812-21sh11:43:523
28415060,0irq/27-eth0-tx-19858-21ssh10:07:302
28415060,0irq/27-eth0-tx-0-21swapper/212:07:302
28415060,0irq/27-eth0-tx-0-21swapper/212:03:202
28415060,0irq/27-eth0-tx-0-21swapper/211:52:082
28415060,0irq/27-eth0-tx-0-21swapper/211:42:352
28415060,0irq/27-eth0-tx-0-21swapper/211:34:472
28415060,0irq/27-eth0-tx-0-21swapper/211:23:422
28415060,0irq/27-eth0-tx-0-21swapper/211:18:532
28415060,0irq/27-eth0-tx-0-21swapper/211:13:122
28415060,0irq/27-eth0-tx-0-21swapper/211:06:162
28415060,0irq/27-eth0-tx-0-21swapper/211:00:312
28415060,0irq/27-eth0-tx-0-21swapper/210:48:222
28415060,0irq/27-eth0-tx-0-21swapper/210:43:112
28415060,0irq/27-eth0-tx-0-21swapper/210:37:362
28415060,0irq/27-eth0-tx-0-21swapper/210:34:022
28415060,0irq/27-eth0-tx-0-21swapper/210:27:242
28415060,0irq/27-eth0-tx-0-21swapper/210:23:452
28415060,0irq/27-eth0-tx-0-21swapper/210:19:102
28415060,0irq/27-eth0-tx-0-21swapper/210:00:472
28415060,0irq/27-eth0-tx-0-21swapper/209:51:242
28415060,0irq/27-eth0-tx-0-21swapper/209:43:152
28415060,0irq/27-eth0-tx-0-21swapper/209:38:502
28415060,0irq/27-eth0-tx-0-21swapper/209:10:022
28415060,0irq/27-eth0-tx-0-21swapper/209:01:492
28415060,0irq/27-eth0-tx-0-21swapper/208:56:132
28415060,0irq/27-eth0-tx-0-21swapper/208:51:222
28415060,0irq/27-eth0-tx-0-21swapper/008:22:170
28415060,0irq/27-eth0-tx-0-21swapper/008:04:580
28415060,0irq/27-eth0-tx-0-21swapper/007:44:550
28415060,0irq/27-eth0-tx-0-21swapper/006:49:450
28405060,0irq/26-eth0-rx-10947-21python12:02:213
249960,0watchdog/218178-21load08:22:192
249960,0watchdog/20-21swapper/211:49:142
249960,0watchdog/20-21swapper/211:41:022
249960,0watchdog/20-21swapper/211:27:182
87269955,0cyclictest0-21swapper/111:39:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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