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2026-05-22 - 02:39

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 Fri May 22, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450720,0irq/25-eth10-21swapper/318:51:043
1726624544,0sleep00-21swapper/018:50:170
1726823525,0sleep20-21swapper/218:50:192
2274123324,0sleep10-21swapper/118:53:541
229049988,0cyclictest19873-21awk19:20:111
339970,0migration/312942-21sh23:50:183
339960,0migration/36468-21sh23:07:313
339960,0migration/36039-21sh23:27:173
339960,0migration/329558-21munin-node22:40:173
339960,0migration/324484-21sh21:39:593
339960,0migration/323988-21sh21:39:113
339960,0migration/322697-21sh21:55:563
229039960,0cyclictest0-21swapper/000:13:280
149960,0migration/030227-21sh23:01:080
149960,0migration/023476-21sh21:17:090
149960,0migration/017533-21irqcore21:35:130
149960,0migration/015387-21sh22:13:310
149960,0migration/014354-21timerandwakeup20:25:190
339950,0migration/39794-21cpuspeed_turbos20:50:093
339950,0migration/39608-21irqrtprio21:10:123
339950,0migration/39276-21kthreadcore19:10:143
339950,0migration/38308-21taskset21:50:033
339950,0migration/3576-21fschecks_count21:05:093
339950,0migration/35228-21munin-node19:30:153
339950,0migration/332535-21diskmemload21:45:033
339950,0migration/331802-21kthreadcore19:50:133
339950,0migration/329951-21kthreadcore20:40:123
339950,0migration/324935-21fschecks_count21:00:113
339950,0migration/324243-21aten_r1power_po22:20:083
339950,0migration/323004-21kthreadcore19:45:133
339950,0migration/322236-21munin-node20:35:093
339950,0migration/321934-21munin-node20:10:133
339950,0migration/321675-21kthreadcore19:20:133
339950,0migration/320095-21kthreadcore23:15:143
339950,0migration/316509-21fschecks_time22:35:093
339950,0migration/315198-21munin-node20:05:113
339950,0migration/313472-21latency22:10:153
29725050,0irq/27-eth0-tx-23609-21munin-node23:20:132
29725050,0irq/27-eth0-tx-16352-21munin-node21:55:182
29725050,0irq/27-eth0-tx-14884-21ssh23:54:562
29725050,0irq/27-eth0-tx-0-21swapper/223:40:382
29725050,0irq/27-eth0-tx-0-21swapper/222:49:022
29725050,0irq/27-eth0-tx-0-21swapper/222:44:262
29725050,0irq/27-eth0-tx-0-21swapper/221:46:442
29725050,0irq/27-eth0-tx-0-21swapper/221:41:072
29725050,0irq/27-eth0-tx-0-21swapper/221:30:112
29725050,0irq/27-eth0-tx-0-21swapper/020:46:180
29725050,0irq/27-eth0-tx-0-21swapper/020:33:170
29715050,0irq/26-eth0-rx-7939-21df_abs23:10:093
29715050,0irq/26-eth0-rx-7277-21munin-node23:30:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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