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2026-06-12 - 22:46

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 Jun 12, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2735126463,0sleep00-21swapper/006:51:440
304450350,0irq/25-eth10-21swapper/306:48:313
2721223223,0sleep10-21swapper/106:50:051
2718122723,0sleep20-21swapper/206:49:462
339960,0migration/37990-21sh08:59:003
339960,0migration/37218-21sh12:22:303
339960,0migration/36156-21sh11:58:453
339960,0migration/329273-21munin-node09:33:133
339960,0migration/324432-21sh11:32:573
339960,0migration/323885-21sh11:11:103
339960,0migration/317599-21sh09:47:433
339960,0migration/316912-21sh09:05:423
339960,0migration/316695-21sh10:26:503
339960,0migration/313556-21missed_timers11:43:123
339960,0migration/313556-21missed_timers11:43:123
339960,0migration/312918-21kthreadcore11:03:113
29725060,0irq/27-eth0-tx-17381-21munin-node07:58:150
29715060,0irq/26-eth0-rx-23080-21sendmail_mailst10:28:143
29715060,0irq/26-eth0-rx-0-21swapper/311:54:283
29715060,0irq/26-eth0-rx-0-21swapper/309:38:543
275279960,0cyclictest0-21swapper/012:10:430
259960,0migration/232324-21sh09:13:192
149960,0migration/08176-21sh11:22:460
149960,0migration/03345-21kthreadcore06:58:120
149960,0migration/031330-21sh11:14:250
149960,0migration/030234-21sh12:13:430
149960,0migration/027287-21kernelversion09:53:080
149960,0migration/024334-21sh11:12:290
149960,0migration/016978-21sh09:45:550
149960,0migration/015910-21sh10:24:310
8215050,0irq/24-0000:00:9525-21cat10:02:542
8215050,0irq/24-0000:00:25845-21latency_hist09:32:542
339950,0migration/39593-21taskset07:03:093
339950,0migration/37506-21switchtime09:58:163
339950,0migration/34664-21fschecks_time07:48:093
339950,0migration/331728-21munin-node09:13:143
339950,0migration/328838-21timerandwakeup07:38:153
339950,0migration/328163-21kthreadcore08:53:103
339950,0migration/32785-21munin-node09:18:073
339950,0migration/325549-21latency_hist10:12:543
339950,0migration/323659-21open_files09:28:133
339950,0migration/320917-21kthreadcore07:33:133
339950,0migration/320421-21kthreadcore07:58:113
339950,0migration/317777-21kthreadcore08:43:133
339950,0migration/316849-21fschecks_time11:48:063
339950,0migration/315083-21taskset11:24:383
29725050,0irq/27-eth0-tx-9036-21munin-node10:43:152
29725050,0irq/27-eth0-tx-8143-21munin-node11:43:132
29725050,0irq/27-eth0-tx-8143-21munin-node11:43:132
29725050,0irq/27-eth0-tx-7258-21ssh10:38:342
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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