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2026-09-05 - 02:59

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 Sat Sep 05, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450790,0irq/25-eth10-21swapper/318:42:333
1022727574,0sleep00-21swapper/018:42:270
1041623728,0sleep10-21swapper/118:44:361
1031023425,0sleep20-21swapper/218:43:252
105059970,0cyclictest18901-21smart_sdb23:30:100
339960,0migration/36681-21taskset21:20:443
339960,0migration/329925-21sh21:55:333
339960,0migration/329180-21fschecks_time00:00:033
339960,0migration/314329-21sh22:29:393
339960,0migration/311815-21sh23:26:443
29725060,0irq/27-eth0-tx-12702-21munin-node19:35:070
29715060,0irq/26-eth0-rx-26483-21kthreadcore22:55:073
29715060,0irq/26-eth0-rx-14393-21munin-run20:24:503
19160,0ktimersoftd/10-21swapper/121:18:271
149960,0migration/09295-21kthreadcore20:20:060
149960,0migration/016013-21idleruntime-cro21:29:500
105059966,0cyclictest0-21swapper/023:10:090
339950,0migration/39935-21kthreadcore22:05:093
339950,0migration/35938-21munin-node23:45:063
339950,0migration/3514-21kthreadcore22:40:063
339950,0migration/33923-21proc_pri19:00:103
339950,0migration/33523-21munin-node20:40:063
339950,0migration/329907-21taskset22:17:063
339950,0migration/325380-21df_abs19:20:023
339950,0migration/322160-21kthreadcore19:40:063
339950,0migration/320596-21aten_r1power_cu23:55:023
339950,0migration/31845-21kthreadcore23:20:063
339950,0migration/316953-21kthreadcore22:30:063
339950,0migration/316192-21latency_hist21:29:503
339950,0migration/31524-21kthreadcore22:20:063
339950,0migration/313713-21irqcore23:50:063
339950,0migration/311875-21munin-node18:45:043
339950,0migration/311710-21unixbench_multi23:05:113
339950,0migration/310652-21kthreadcore21:05:053
29725050,0irq/27-eth0-tx-25635-21kthreadcore22:55:072
29725050,0irq/27-eth0-tx-21065-21munin-node23:35:102
29725050,0irq/27-eth0-tx-19161-21ssh23:51:292
29725050,0irq/27-eth0-tx-0-21swapper/020:45:310
29715050,0irq/26-eth0-rx-7549-21taskset20:17:423
29715050,0irq/26-eth0-rx-30588-21fschecks_count23:00:043
29715050,0irq/26-eth0-rx-23927-21kernelversion22:35:053
29715050,0irq/26-eth0-rx-18371-21cut20:00:083
29715050,0irq/26-eth0-rx-13805-21fschecks_time23:30:023
29715050,0irq/26-eth0-rx-12115-21diskstats19:10:023
29715050,0irq/26-eth0-rx-0-21swapper/323:10:493
29715050,0irq/26-eth0-rx-0-21swapper/322:45:073
29715050,0irq/26-eth0-rx-0-21swapper/322:09:523
29715050,0irq/26-eth0-rx-0-21swapper/322:04:383
29715050,0irq/26-eth0-rx-0-21swapper/321:25:063
29715050,0irq/26-eth0-rx-0-21swapper/321:00:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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