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2026-05-23 - 00:02

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 100 highest latencies:
System rack1slot2s.osadl.org (updated Fri May 22, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450460,0irq/25-eth10-21swapper/306:51:593
218023424,0sleep10-21swapper/106:53:461
214423127,0sleep20-21swapper/206:53:192
207723127,0sleep00-21swapper/006:52:330
339960,0migration/38082-21sh10:19:283
339960,0migration/37937-21sh09:38:043
339960,0migration/332587-21sh09:34:023
339960,0migration/331795-21sh09:52:203
339960,0migration/324453-21sh09:49:203
339960,0migration/323367-21runrttasks11:08:323
339960,0migration/315881-21sh11:04:543
339960,0migration/314194-21sh12:22:483
339960,0migration/311454-21kthreadcore09:00:103
29725060,0irq/27-eth0-tx-4562-21munin-node07:45:140
29715060,0irq/26-eth0-rx-7605-21sh12:00:043
29715060,0irq/26-eth0-rx-18161-21iostat_ios09:05:083
29715060,0irq/26-eth0-rx-17400-21grep10:45:103
29715060,0irq/26-eth0-rx-10597-21kthreadcore10:40:093
259960,0migration/22483-21kthreadcore11:55:102
23509966,0cyclictest0-21swapper/209:33:022
23509966,0cyclictest0-21swapper/209:02:272
23499966,0cyclictest479-21diskmemload11:53:431
23499960,0cyclictest0-21swapper/109:11:001
23499960,0cyclictest0-21swapper/108:56:401
149960,0migration/08159-21sh09:38:410
149960,0migration/06281-21sh11:36:440
149960,0migration/032116-21sh10:34:130
149960,0migration/031047-21sh11:12:300
149960,0migration/023410-21sh11:49:500
149960,0migration/014001-21sh12:22:130
8215050,0irq/24-0000:00:16095-21munin-run10:44:542
339950,0migration/39817-21irqcore10:00:103
339950,0migration/38026-21kthreadcore08:35:103
339950,0migration/37753-21taskset08:57:213
339950,0migration/33932-21kthreadcore12:15:103
339950,0migration/33407-21idleruntime06:55:083
339950,0migration/332413-21fschecks_time11:55:063
339950,0migration/332364-21munin-node11:35:063
339950,0migration/331396-21aten_r1power_vo08:05:063
339950,0migration/331219-21timerwakeupswit09:10:163
339950,0migration/330643-21taskset08:00:463
339950,0migration/329647-21taskset07:35:433
339950,0migration/324936-21kthreadcore12:10:093
339950,0migration/324335-21sh10:09:333
339950,0migration/319430-21kthreadcore12:05:093
339950,0migration/31931-21kthreadcore09:55:093
339950,0migration/317335-21kthreadcore07:05:103
339950,0migration/317231-21cpuspeed_turbos07:30:063
339950,0migration/313066-21latency11:40:123
339950,0migration/313066-21latency11:40:123
29725050,0irq/27-eth0-tx-8075-21ssh09:17:462
29725050,0irq/27-eth0-tx-16920-21munin-node07:30:100
29725050,0irq/27-eth0-tx-13146-21munin-node08:40:100
29725050,0irq/27-eth0-tx-0-21swapper/008:55:010
29725050,0irq/27-eth0-tx-0-21swapper/008:30:090
29725050,0irq/27-eth0-tx-0-21swapper/008:17:040
29715050,0irq/26-eth0-rx-8857-21ssh09:40:033
29715050,0irq/26-eth0-rx-26025-21irqstats10:10:083
29715050,0irq/26-eth0-rx-2520-21kthreadcore11:15:113
29715050,0irq/26-eth0-rx-23609-21which07:55:163
29715050,0irq/26-eth0-rx-22687-21kthreadcore08:20:123
29715050,0irq/26-eth0-rx-20940-21kthreadcore11:45:133
29715050,0irq/26-eth0-rx-16922-21sort09:24:543
29715050,0irq/26-eth0-rx-14407-21sed10:20:163
29715050,0irq/26-eth0-rx-0-21swapper/311:50:093
29715050,0irq/26-eth0-rx-0-21swapper/311:32:463
29715050,0irq/26-eth0-rx-0-21swapper/311:25:053
29715050,0irq/26-eth0-rx-0-21swapper/311:10:043
29715050,0irq/26-eth0-rx-0-21swapper/310:38:263
29715050,0irq/26-eth0-rx-0-21swapper/310:29:543
29715050,0irq/26-eth0-rx-0-21swapper/309:25:063
27150,0ktimersoftd/20-21swapper/212:14:222
27150,0ktimersoftd/20-21swapper/212:05:292
27150,0ktimersoftd/20-21swapper/211:33:432
259950,0migration/232105-21latency_hist08:29:542
259950,0migration/226541-21munin-node08:25:102
259950,0migration/210127-21kthreadcore10:00:102
249950,0watchdog/26173-21cat10:35:162
249950,0watchdog/223884-21ssh09:07:042
23509955,0cyclictest0-21swapper/212:02:582
23509955,0cyclictest0-21swapper/211:45:092
23509955,0cyclictest0-21swapper/211:35:512
23509955,0cyclictest0-21swapper/211:29:042
23509955,0cyclictest0-21swapper/211:18:022
23509955,0cyclictest0-21swapper/211:05:342
23509955,0cyclictest0-21swapper/210:24:442
23509955,0cyclictest0-21swapper/210:06:462
23509955,0cyclictest0-21swapper/209:36:582
23509950,0cyclictest0-21swapper/210:14:112
23499955,0cyclictest0-21swapper/108:10:091
23499950,0cyclictest0-21swapper/112:17:121
23499950,0cyclictest0-21swapper/111:47:051
23499950,0cyclictest0-21swapper/111:37:281
23499950,0cyclictest0-21swapper/111:15:431
23499950,0cyclictest0-21swapper/109:46:291
23499950,0cyclictest0-21swapper/109:43:571
179950,0migration/18897-21latency07:20:141
179950,0migration/131172-21taskset10:31:311
179950,0migration/127875-21kthreadcore08:50:101
179950,0migration/122722-21taskset10:25:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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