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2026-05-19 - 01:27

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 19, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2213024443,0sleep00-21swapper/018:52:440
2206023626,0sleep20-21swapper/218:51:582
304450350,0irq/25-eth10-21swapper/318:50:493
2228023122,0sleep10-21swapper/118:54:331
224129970,0cyclictest0-21swapper/122:46:571
224119976,0cyclictest0-21swapper/021:05:270
339960,0migration/330361-21unixbench-2d19:45:363
339960,0migration/33033-21sh22:43:263
339960,0migration/328370-21sh21:59:413
339960,0migration/327424-21latency_hist23:40:133
339960,0migration/32424-21sh23:22:583
339960,0migration/319397-21sh23:14:413
339960,0migration/318139-21sh23:52:143
339960,0migration/317462-21sh00:10:573
339960,0migration/310576-21sh00:09:213
29715060,0irq/26-eth0-rx-26080-21ssh23:15:513
29715060,0irq/26-eth0-rx-11026-21taskset21:06:033
259960,0migration/217822-21munin-node22:30:332
224139966,0cyclictest0-21swapper/221:54:562
149960,0migration/03718-21sh21:03:360
149960,0migration/02150-21sh00:24:040
149960,0migration/010526-21sh21:45:370
8215050,0irq/24-0000:00:18953-21sa100:15:132
35150,0ktimersoftd/30-21swapper/320:40:113
339950,0migration/39706-21switchtime23:05:373
339950,0migration/37274-21idleruntime20:20:293
339950,0migration/35322-21proc_pri20:15:343
339950,0migration/34792-21munin-node22:05:253
339950,0migration/329283-21irqcore23:00:323
339950,0migration/325641-21munin-node22:55:343
339950,0migration/324521-21kthreadcore21:15:303
339950,0migration/323819-21kthreadcore20:05:293
339950,0migration/32124-21rt-features22:00:363
339950,0migration/319529-21cpuspeed_turbos00:15:243
339950,0migration/31928-21sendmail_mailtr22:20:353
339950,0migration/318636-21munin-node19:40:293
339950,0migration/317504-21fschecks_time19:15:283
339950,0migration/313859-21taskset20:50:073
339950,0migration/311591-21sh21:47:393
339950,0migration/310599-21sh22:26:063
29725050,0irq/27-eth0-tx-608-21munin-node20:40:260
29725050,0irq/27-eth0-tx-5122-21kthreadcore23:25:292
29725050,0irq/27-eth0-tx-4456-21munin-node22:05:312
29725050,0irq/27-eth0-tx-3349-21munin-node23:45:292
29725050,0irq/27-eth0-tx-32413-21kthreadcore00:20:312
29725050,0irq/27-eth0-tx-3020-21ssh21:20:552
29725050,0irq/27-eth0-tx-25640-21python23:15:352
29725050,0irq/27-eth0-tx-12747-21if_err_eth1.223:10:272
29725050,0irq/27-eth0-tx-0-21swapper/223:02:572
29725050,0irq/27-eth0-tx-0-21swapper/222:02:292
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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