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2026-06-20 - 03:26

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 100 highest latencies:
System rack1slot2s.osadl.org (updated Sat Jun 20, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1869827975,0sleep10-21swapper/118:50:381
304450400,0irq/25-eth10-21swapper/318:51:203
1852823324,0sleep20-21swapper/218:48:392
1848423120,0sleep00-21swapper/018:48:090
339970,0migration/323856-21sh21:54:103
339960,0migration/38197-21taskset00:07:193
339960,0migration/37258-21sh21:03:323
29725060,0irq/27-eth0-tx-22648-21munin-node20:32:200
149960,0migration/09456-21timerandwakeup20:42:330
149960,0migration/07138-21sh00:04:580
149960,0migration/031120-21timerwakeupswit21:57:320
149960,0migration/016221-21taskset21:50:210
149960,0migration/015274-21sh22:08:040
149960,0migration/014968-21taskset23:08:290
149960,0migration/01092-21fschecks_time22:42:230
8215050,0irq/24-0000:00:16203-21latency_hist23:32:102
4150,0ktimersoftd/00-21swapper/022:56:150
4150,0ktimersoftd/00-21swapper/022:56:150
339950,0migration/39949-21taskset20:45:323
339950,0migration/38946-21kthreadcore19:07:283
339950,0migration/3767-21runrttasks22:02:203
339950,0migration/37476-21aten_r1power_po19:32:213
339950,0migration/37403-21taskset22:24:043
339950,0migration/3435-21munin-node19:47:323
339950,0migration/330991-21sh23:18:123
339950,0migration/330384-21kthreadcore19:22:283
339950,0migration/328539-21kthreadcore20:57:283
339950,0migration/327164-21kthreadcore22:17:263
339950,0migration/32675-21kthreadcore23:02:273
339950,0migration/324717-21latency_hist22:57:113
339950,0migration/323401-21sh20:53:493
339950,0migration/321813-21kthreadcore23:12:273
339950,0migration/321738-21aten_r1power_fr20:07:223
339950,0migration/320318-21taskset19:40:363
339950,0migration/31978-21munin-node19:52:233
339950,0migration/319199-21kthreadcore22:32:263
339950,0migration/319191-21kthreadcore21:32:283
339950,0migration/317554-21munin-node22:52:233
339950,0migration/317554-21munin-node22:52:233
339950,0migration/314987-21munin-node20:22:323
339950,0migration/314381-21timerwakeupswit23:27:323
339950,0migration/31072-21aten_r1power_cu21:22:213
29725050,0irq/27-eth0-tx-6376-21munin-node19:07:270
29725050,0irq/27-eth0-tx-575-21munin-node19:27:240
29725050,0irq/27-eth0-tx-30183-21munin-node23:57:322
29725050,0irq/27-eth0-tx-25319-21munin-node21:37:222
29725050,0irq/27-eth0-tx-23000-21chrt23:33:372
29725050,0irq/27-eth0-tx-2098-21irqstats22:02:262
29725050,0irq/27-eth0-tx-15907-21ssh21:29:102
29725050,0irq/27-eth0-tx-0-21swapper/020:52:220
29725050,0irq/27-eth0-tx-0-21swapper/020:37:300
29725050,0irq/27-eth0-tx-0-21swapper/020:02:350
29725050,0irq/27-eth0-tx-0-21swapper/019:47:240
29715050,0irq/26-eth0-rx-9796-21fschecks_time21:27:243
29715050,0irq/26-eth0-rx-27326-21grep21:17:273
29715050,0irq/26-eth0-rx-21868-21ps19:42:273
29715050,0irq/26-eth0-rx-19229-21grep23:52:283
29715050,0irq/26-eth0-rx-16339-21ssh21:50:413
29715050,0irq/26-eth0-rx-14623-21ssh23:48:013
29715050,0irq/26-eth0-rx-13175-21kthreadcore20:47:293
29715050,0irq/26-eth0-rx-10205-21irqrtprio22:07:273
29715050,0irq/26-eth0-rx-1001-21if_err_eth123:42:243
29715050,0irq/26-eth0-rx-0-21swapper/323:57:283
29715050,0irq/26-eth0-rx-0-21swapper/323:38:473
29715050,0irq/26-eth0-rx-0-21swapper/322:40:043
29715050,0irq/26-eth0-rx-0-21swapper/321:57:173
29715050,0irq/26-eth0-rx-0-21swapper/321:39:113
29715050,0irq/26-eth0-rx-0-21swapper/321:14:453
29715050,0irq/26-eth0-rx-0-21swapper/321:07:263
29715050,0irq/26-eth0-rx-0-21swapper/300:19:223
29715050,0irq/26-eth0-rx-0-21swapper/300:02:223
27150,0ktimersoftd/216736-21diskmemload22:56:152
27150,0ktimersoftd/216736-21diskmemload22:56:152
249950,0watchdog/25864-21missed_timers23:02:292
189079955,0cyclictest0-21swapper/123:45:411
189079955,0cyclictest0-21swapper/123:18:151
189079955,0cyclictest0-21swapper/121:23:571
189079955,0cyclictest0-21swapper/121:08:211
189079950,0cyclictest0-21swapper/122:38:031
189079950,0cyclictest0-21swapper/122:28:261
189079950,0cyclictest0-21swapper/121:54:231
189079950,0cyclictest0-21swapper/121:45:241
189079950,0cyclictest0-21swapper/121:06:371
189069955,0cyclictest0-21swapper/023:55:410
189069955,0cyclictest0-21swapper/023:32:590
189069955,0cyclictest0-21swapper/023:26:120
189069955,0cyclictest0-21swapper/023:02:240
189069955,0cyclictest0-21swapper/022:58:180
189069950,0cyclictest0-21swapper/022:35:270
189069950,0cyclictest0-21swapper/022:24:050
179950,0migration/18981-21latency_hist21:47:111
179950,0migration/1477-21latency_hist22:22:111
179950,0migration/127901-21kthreadcore18:57:271
179950,0migration/121974-21unixbench_singl20:27:351
179950,0migration/11513-21if_eth1.322:42:251
179950,0migration/110833-21fschecks_count20:47:251
169950,0watchdog/129615-21kthreadcore23:37:291
169950,0watchdog/115908-21ssh23:31:211
149950,0migration/0983-21cpuspeed_turbos21:02:220
149950,0migration/08985-21latency_hist21:27:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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