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2026-06-17 - 01:40

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 Wed Jun 17, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3098224636,0sleep30-21swapper/318:50:133
3098523930,0sleep10-21swapper/118:50:151
3109023423,0sleep00-21swapper/018:51:300
3085823425,0sleep20-21swapper/218:48:442
312449974,0cyclictest32257-21munin-run19:17:290
35160,0ktimersoftd/30-21swapper/321:24:093
339960,0migration/37963-21kthreadcore22:37:463
339960,0migration/35335-21sh21:16:393
339960,0migration/33164-21pmu-power21:52:463
339960,0migration/331269-21munin-node19:12:483
339960,0migration/320599-21munin-node19:32:413
339960,0migration/319568-21sh00:05:183
339960,0migration/313177-21sh22:22:223
339960,0migration/311301-21sh00:19:523
312479960,0cyclictest20578-21latency_hist23:47:272
312459960,0cyclictest0-21swapper/121:35:321
29725060,0irq/27-eth0-tx-19134-21munin-node19:07:500
29715060,0irq/26-eth0-rx-28788-21ssh23:12:033
29715060,0irq/26-eth0-rx-21413-21cpuspeed_turbos19:57:403
29715060,0irq/26-eth0-rx-11439-21ssh22:58:243
149960,0migration/04197-21sh23:16:250
149960,0migration/028533-21sh21:09:160
149960,0migration/027629-21pmu-power20:22:500
149960,0migration/020221-21sh23:05:310
149960,0migration/012663-21sh22:00:190
149960,0migration/012104-21sh00:01:530
8215050,0irq/24-0000:00:0-21swapper/219:12:292
4150,0ktimersoftd/00-21swapper/022:04:210
4150,0ktimersoftd/00-21swapper/021:24:090
35150,0ktimersoftd/30-21swapper/321:22:203
339950,0migration/39701-21kthreadcore19:22:453
339950,0migration/36517-21kthreadcore23:37:453
339950,0migration/36373-21munin-node20:57:453
339950,0migration/332390-21if_eth118:52:443
339950,0migration/332322-21kthreadcore21:32:453
339950,0migration/332053-21munin-node19:37:473
339950,0migration/330401-21kthreadcore20:27:443
339950,0migration/329837-21munin-node22:12:403
339950,0migration/329789-21aten_r1power_cu20:52:393
339950,0migration/328518-21ksmtuned22:09:403
339950,0migration/327595-21unixbench_multi22:27:523
339950,0migration/32696-21sh23:53:133
339950,0migration/320219-21taskset22:45:003
339950,0migration/319883-21unixbench-2d21:42:543
339950,0migration/316052-21kthreadcore21:02:453
339950,0migration/314242-21kthreadcore23:22:443
339950,0migration/313768-21munin-node22:22:413
339950,0migration/31136-21kthreadcore23:12:463
339950,0migration/310999-21kthreadcore19:47:483
339950,0migration/310124-21kthreadcore21:37:453
312479955,0cyclictest0-21swapper/221:47:572
312479950,0cyclictest0-21swapper/223:18:362
312479950,0cyclictest0-21swapper/222:53:422
312479950,0cyclictest0-21swapper/221:38:102
312459955,0cyclictest29532-21diskmemload23:43:041
312459955,0cyclictest29532-21diskmemload00:05:181
312459955,0cyclictest0-21swapper/123:20:131
312459955,0cyclictest0-21swapper/123:12:291
312459950,0cyclictest0-21swapper/122:10:511
312459950,0cyclictest0-21swapper/122:05:571
312459950,0cyclictest0-21swapper/121:22:551
312459950,0cyclictest0-21swapper/121:00:511
312449955,0cyclictest0-21swapper/020:37:500
312449955,0cyclictest0-21swapper/018:52:500
29725050,0irq/27-eth0-tx-5766-21munin-node18:57:500
29725050,0irq/27-eth0-tx-4384-21munin-node00:17:392
29725050,0irq/27-eth0-tx-32750-21kthreadcore21:12:462
29725050,0irq/27-eth0-tx-29792-21munin-node22:12:502
29725050,0irq/27-eth0-tx-29532-21diskmemload23:28:532
29725050,0irq/27-eth0-tx-21645-21ssh22:27:402
29725050,0irq/27-eth0-tx-16430-21munin-node20:42:440
29725050,0irq/27-eth0-tx-14044-21munin-node21:22:462
29725050,0irq/27-eth0-tx-11678-21ssh20:58:122
29725050,0irq/27-eth0-tx-0-21swapper/223:52:452
29725050,0irq/27-eth0-tx-0-21swapper/222:49:482
29725050,0irq/27-eth0-tx-0-21swapper/222:37:422
29725050,0irq/27-eth0-tx-0-21swapper/222:32:282
29725050,0irq/27-eth0-tx-0-21swapper/221:31:022
29725050,0irq/27-eth0-tx-0-21swapper/221:07:542
29725050,0irq/27-eth0-tx-0-21swapper/200:06:352
29725050,0irq/27-eth0-tx-0-21swapper/019:42:490
29715050,0irq/26-eth0-rx-6968-21grep23:17:443
29715050,0irq/26-eth0-rx-6559-21runrttasks23:02:323
29715050,0irq/26-eth0-rx-6559-21runrttasks00:17:093
29715050,0irq/26-eth0-rx-27461-21latency21:27:463
29715050,0irq/26-eth0-rx-1841-21munin-run20:07:283
29715050,0irq/26-eth0-rx-0-21swapper/323:50:223
29715050,0irq/26-eth0-rx-0-21swapper/323:29:013
29715050,0irq/26-eth0-rx-0-21swapper/322:55:223
29715050,0irq/26-eth0-rx-0-21swapper/322:51:563
29715050,0irq/26-eth0-rx-0-21swapper/322:32:463
29715050,0irq/26-eth0-rx-0-21swapper/322:04:243
29715050,0irq/26-eth0-rx-0-21swapper/322:01:533
29715050,0irq/26-eth0-rx-0-21swapper/321:08:073
29715050,0irq/26-eth0-rx-0-21swapper/320:17:433
29715050,0irq/26-eth0-rx-0-21swapper/300:00:323
27150,0ktimersoftd/20-21swapper/223:00:192
259950,0migration/23528-21sendmail_mailqu21:32:502
259950,0migration/224614-21kthreadcore19:32:452
259950,0migration/22399-21munin-node00:12:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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