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2026-05-05 - 21:31

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 May 05, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450960,0irq/25-eth10-21swapper/306:51:513
2909524536,0sleep20-21swapper/206:52:052
2915723524,0sleep10-21swapper/106:52:481
2913023221,0sleep00-21swapper/006:52:270
295529970,0cyclictest12960-21kthreadcore10:41:462
295509976,0cyclictest0-21swapper/109:54:251
339960,0migration/39238-21sh12:20:333
339960,0migration/326434-21munin-node12:11:423
339960,0migration/32043-21sh10:12:183
339960,0migration/318249-21sh11:04:133
29725060,0irq/27-eth0-tx-4112-21munin-node07:01:500
29715060,0irq/26-eth0-rx-3215-21gltestperf11:36:443
29715060,0irq/26-eth0-rx-3026-21munin-node11:56:443
29715060,0irq/26-eth0-rx-3026-21munin-node11:56:443
29715060,0irq/26-eth0-rx-19945-21cat10:06:303
29715060,0irq/26-eth0-rx-19180-21iostat12:06:453
295509960,0cyclictest0-21swapper/108:57:401
149960,0migration/026461-21sh10:28:090
149960,0migration/02340-21sh10:54:320
149960,0migration/023093-21kthreadcore08:01:480
149960,0migration/018354-21sh07:56:530
149960,0migration/017953-21sh11:24:340
149960,0migration/01758-21sh10:32:160
149960,0migration/01173-21sh11:12:160
149960,0migration/010649-21sh11:21:240
339950,0migration/36944-21kthreadcore11:16:473
339950,0migration/329648-21kthreadcore10:31:463
339950,0migration/326749-21kthreadcore09:41:483
339950,0migration/324244-21timerwakeupswit07:36:533
339950,0migration/323740-21kthreadcore10:06:453
339950,0migration/318822-21ksmtuned07:58:173
339950,0migration/318560-21kthreadcore09:31:473
339950,0migration/316179-21diskmemload12:22:293
339950,0migration/315917-21kthreadcore07:06:493
339950,0migration/314361-21kthreadcore10:41:473
339950,0migration/312241-21munin-node11:21:443
339950,0migration/310997-21taskset09:23:023
339950,0migration/310489-21taskset07:05:593
29725050,0irq/27-eth0-tx-28058-21cut11:31:462
29725050,0irq/27-eth0-tx-27321-21munin-node11:11:492
29725050,0irq/27-eth0-tx-2023-21munin-node09:51:442
29725050,0irq/27-eth0-tx-19293-21munin-node11:06:452
29725050,0irq/27-eth0-tx-18830-21perl12:06:432
29725050,0irq/27-eth0-tx-12757-21ssh09:27:232
29725050,0irq/27-eth0-tx-10779-21munin-node07:06:470
29725050,0irq/27-eth0-tx-0-21swapper/008:56:320
29725050,0irq/27-eth0-tx-0-21swapper/007:33:130
29725050,0irq/27-eth0-tx-0-21swapper/007:21:430
29715050,0irq/26-eth0-rx-712-21grep08:56:483
29715050,0irq/26-eth0-rx-26037-21ssh11:08:333
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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