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2026-06-08 - 20:02

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 Mon Jun 08, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450870,0irq/25-eth10-21swapper/306:48:283
1882823525,0sleep10-21swapper/106:50:531
1764923322,0sleep00-21swapper/006:48:350
1872923127,0sleep20-21swapper/206:49:422
339960,0migration/39244-21sh09:47:033
339960,0migration/37283-21sh12:05:143
339960,0migration/3666-21sh11:03:093
339960,0migration/331982-21sh11:40:543
339960,0migration/324766-21sh09:55:283
339960,0migration/323152-21sh11:54:033
339960,0migration/316616-21taskset10:51:533
339960,0migration/316405-21sh09:28:553
259960,0migration/210173-21idleruntime10:48:312
191079966,0cyclictest17298-21diskmemload09:16:481
191069960,0cyclictest0-21swapper/011:09:370
149960,0migration/09499-21sh09:27:020
149960,0migration/07682-21sh11:45:480
149960,0migration/032481-21sh09:39:000
149960,0migration/020347-21irqcore06:53:340
149960,0migration/01590-21sh09:22:410
149960,0migration/015661-21sh12:11:150
149960,0migration/014854-21latency10:28:340
4150,0ktimersoftd/00-21swapper/009:05:520
339950,0migration/332712-21taskset09:39:403
339950,0migration/33127-21latency_hist08:18:173
339950,0migration/32889-21kthreadcore09:03:333
339950,0migration/328527-21missed_timers08:33:363
339950,0migration/328439-21kthreadcore09:58:333
339950,0migration/327775-21munin-node07:23:323
339950,0migration/326644-21irqcore10:38:333
339950,0migration/326522-21cpu09:18:293
339950,0migration/326060-21cpuspeed_turbos10:18:293
339950,0migration/325604-21missed_timers07:18:363
339950,0migration/32455-21cpuspeed_turbos07:53:283
339950,0migration/323746-21sshd11:14:283
339950,0migration/319628-21kthreadcore08:28:333
339950,0migration/318254-21fschecks_count10:13:303
339950,0migration/317031-21kthreadcore07:13:343
339950,0migration/316232-21fschecks_time08:03:303
339950,0migration/315516-21taskset12:10:513
339950,0migration/314906-21timerandwakeup11:28:413
339950,0migration/313748-21kthreadcore08:23:353
339950,0migration/312030-21kthreadcore09:08:333
29725050,0irq/27-eth0-tx-32354-21ssh10:19:542
29725050,0irq/27-eth0-tx-18036-21munin-node09:13:292
29725050,0irq/27-eth0-tx-16698-21ssh10:31:432
29725050,0irq/27-eth0-tx-10868-21munin-node08:48:400
29725050,0irq/27-eth0-tx-0-21swapper/211:30:122
29725050,0irq/27-eth0-tx-0-21swapper/210:16:412
29725050,0irq/27-eth0-tx-0-21swapper/209:53:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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