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2026-06-23 - 03:30

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 Tue Jun 23, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450740,0irq/25-eth10-21swapper/318:50:173
1845023724,0sleep10-21swapper/118:48:351
1839623522,0sleep00-21swapper/018:47:540
1856923026,0sleep20-21swapper/218:49:562
35160,0ktimersoftd/30-21swapper/323:55:213
35160,0ktimersoftd/30-21swapper/323:55:213
339960,0migration/332419-21sh21:00:093
339960,0migration/315671-21timerwakeupswit21:27:143
29725060,0irq/27-eth0-tx-17088-21latency_hist22:31:532
29725060,0irq/27-eth0-tx-1016-21munin-node21:02:082
29715060,0irq/26-eth0-rx-886-21date21:01:543
188109965,0cyclictest7441-21grep19:07:061
188099960,0cyclictest8316-21ssh21:23:420
149960,0migration/024373-21sh20:55:280
149960,0migration/01658-21sh21:42:060
8215050,0irq/24-0000:00:9449-21munin-run20:21:542
8215050,0irq/24-0000:00:16998-21munin-run20:51:542
339950,0migration/39094-21aten_r1power_en23:07:043
339950,0migration/39073-21kthreadcore19:07:093
339950,0migration/36681-21munin-node23:22:163
339950,0migration/36667-21kthreadcore19:52:123
339950,0migration/36213-21latency19:27:113
339950,0migration/36166-21kthreadcore20:42:113
339950,0migration/34051-21kthreadcore21:22:093
339950,0migration/332017-21taskset19:01:103
339950,0migration/331159-21kthreadcore19:22:113
339950,0migration/329383-21gltestperf20:12:073
339950,0migration/329170-21kthreadcore23:57:123
339950,0migration/328625-21if_eth1.319:47:103
339950,0migration/32831-21kthreadcore22:42:113
339950,0migration/327487-21kthreadcore00:17:113
339950,0migration/325383-21aten_r1power_po22:57:053
339950,0migration/323469-21taskset00:15:453
339950,0migration/322312-21kthreadcore23:12:123
339950,0migration/32231-21munin-node22:02:083
339950,0migration/322184-21kthreadcore22:52:113
339950,0migration/319046-21kthreadcore22:12:103
339950,0migration/317803-21aten_r1power_vo21:52:063
339950,0migration/317472-21munin-node20:27:103
339950,0migration/316771-21aten_r1power_cu23:32:043
339950,0migration/316771-21aten_r1power_cu23:32:043
339950,0migration/314712-21munin-node19:37:063
339950,0migration/314345-21timerwakeupswit23:47:163
339950,0migration/313775-21taskset19:33:243
29725050,0irq/27-eth0-tx-877-21munin-node19:27:070
29725050,0irq/27-eth0-tx-30709-21ssh00:18:312
29725050,0irq/27-eth0-tx-17702-21ssh21:12:022
29725050,0irq/27-eth0-tx-13232-21tr22:07:082
29725050,0irq/27-eth0-tx-0-21swapper/020:31:270
29715050,0irq/26-eth0-rx-5224-21cut00:02:103
29715050,0irq/26-eth0-rx-447-21cpu23:42:043
29715050,0irq/26-eth0-rx-31379-21python22:17:173
29715050,0irq/26-eth0-rx-27216-21tr22:37:103
29715050,0irq/26-eth0-rx-21860-21kthreadcore20:52:123
29715050,0irq/26-eth0-rx-14590-21ssh00:08:163
29715050,0irq/26-eth0-rx-13951-21kthreadcore21:07:103
29715050,0irq/26-eth0-rx-10239-21irqcore22:47:093
29715050,0irq/26-eth0-rx-0-21swapper/323:40:383
29715050,0irq/26-eth0-rx-0-21swapper/323:30:473
29715050,0irq/26-eth0-rx-0-21swapper/323:17:163
29715050,0irq/26-eth0-rx-0-21swapper/322:27:203
29715050,0irq/26-eth0-rx-0-21swapper/322:25:433
29715050,0irq/26-eth0-rx-0-21swapper/321:48:243
29715050,0irq/26-eth0-rx-0-21swapper/321:43:173
29715050,0irq/26-eth0-rx-0-21swapper/321:37:253
29715050,0irq/26-eth0-rx-0-21swapper/321:34:573
29715050,0irq/26-eth0-rx-0-21swapper/321:12:413
259950,0migration/2371-21runrttasks21:39:512
259950,0migration/229646-21kthreadcore23:17:112
259950,0migration/226683-21kthreadcore23:37:092
259950,0migration/22667-21kthreadcore23:02:102
259950,0migration/225836-21fschecks_count22:37:062
259950,0migration/224780-21sh22:15:232
259950,0migration/217623-21cpuspeed_turbos22:32:042
259950,0migration/217579-21latency_hist21:51:542
259950,0migration/216267-21if_eth1.320:02:092
188119955,0cyclictest0-21swapper/221:11:522
188109955,0cyclictest0-21swapper/123:52:141
188109955,0cyclictest0-21swapper/123:52:141
188109950,0cyclictest0-21swapper/123:43:251
188109950,0cyclictest0-21swapper/122:46:011
188099955,0cyclictest0-21swapper/021:17:140
188099950,0cyclictest0-21swapper/023:22:160
179950,0migration/131689-21timerandwakeup21:37:151
179950,0migration/131218-21sh23:59:181
179950,0migration/124791-21taskset21:55:111
179950,0migration/124080-21sh21:32:391
179950,0migration/119791-21kthreadcore20:27:111
179950,0migration/118261-21kthreadcore23:32:101
179950,0migration/118261-21kthreadcore23:32:101
179950,0migration/118133-21fschecks_time22:12:071
179950,0migration/114931-21kthreadcore19:12:101
179950,0migration/114181-21munin-node23:47:151
179950,0migration/112217-21kthreadcore21:07:101
179950,0migration/111461-21kthreadcore22:27:101
169950,0watchdog/129463-21idleruntime20:12:081
149950,0migration/0728-21latency_hist21:01:540
149950,0migration/07092-21taskset23:43:480
149950,0migration/05241-21kthreadcore21:02:110
149950,0migration/04511-21kthreadcore22:22:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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