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2026-07-29 - 17:22

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 Jul 29, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1071329190,0sleep30-21swapper/306:47:533
1073224938,0sleep00-21swapper/006:48:020
1039523726,0sleep20-21swapper/206:44:072
1053023624,0sleep10-21swapper/106:45:431
339970,0migration/330807-21taskset09:19:013
339960,0migration/312550-21sh10:51:053
29725060,0irq/27-eth0-tx-13875-21munin-node08:03:460
29715060,0irq/26-eth0-rx-30472-21diskstats10:43:373
29715060,0irq/26-eth0-rx-27647-21sh12:03:373
29715060,0irq/26-eth0-rx-2516-21yum11:23:503
29715060,0irq/26-eth0-rx-23504-21cat10:58:443
29715060,0irq/26-eth0-rx-0-21swapper/311:39:403
27160,0ktimersoftd/20-21swapper/210:18:512
149960,0migration/08667-21sh09:08:270
149960,0migration/028648-21sh11:01:550
149960,0migration/024108-21gltestperf09:58:360
149960,0migration/023357-21fschecks_time10:18:360
149960,0migration/023015-21sh09:58:140
149960,0migration/020200-21sh11:17:130
149960,0migration/010147-21sh11:49:410
108319960,0cyclictest0-21swapper/010:48:410
8215050,0irq/24-0000:00:7429-21cat09:48:242
8215050,0irq/24-0000:00:1455-21sensors_fan11:43:452
4150,0ktimersoftd/00-21swapper/010:45:510
339950,0migration/39836-21diskmemload12:10:463
339950,0migration/38642-21kthreadcore11:28:423
339950,0migration/37455-21kthreadcore08:43:433
339950,0migration/3726-21munin-node08:13:483
339950,0migration/330532-21taskset07:00:433
339950,0migration/325746-21munin-node08:08:443
339950,0migration/325234-21munin-node07:43:473
339950,0migration/323287-21sh08:54:263
339950,0migration/319601-21runrttasks11:15:253
339950,0migration/316970-21cpuspeed_turbos09:13:383
339950,0migration/316629-21munin-node06:48:453
339950,0migration/316361-21cpuspeed_turbos09:33:363
339950,0migration/313812-21munin-node08:23:463
339950,0migration/313019-21munin-node11:33:383
339950,0migration/313017-21timerandwakeup07:58:483
339950,0migration/311764-21munin-node07:33:463
339950,0migration/310392-21latency11:08:433
29725050,0irq/27-eth0-tx-7236-21munin-node07:58:420
29725050,0irq/27-eth0-tx-5311-21munin-node07:08:480
29725050,0irq/27-eth0-tx-3017-21munin-node12:08:422
29725050,0irq/27-eth0-tx-25011-21diskstats09:18:372
29725050,0irq/27-eth0-tx-0-21swapper/212:06:072
29725050,0irq/27-eth0-tx-0-21swapper/211:58:292
29725050,0irq/27-eth0-tx-0-21swapper/211:53:372
29725050,0irq/27-eth0-tx-0-21swapper/210:38:212
29725050,0irq/27-eth0-tx-0-21swapper/008:48:390
29725050,0irq/27-eth0-tx-0-21swapper/008:18:370
29725050,0irq/27-eth0-tx-0-21swapper/007:38:450
29725050,0irq/27-eth0-tx-0-21swapper/007:23:370
29715050,0irq/26-eth0-rx-6881-21munin-node10:08:473
29715050,0irq/26-eth0-rx-6181-21ssh09:45:193
29715050,0irq/26-eth0-rx-5622-21kthreadcore11:48:423
29715050,0irq/26-eth0-rx-3609-21ssh11:05:033
29715050,0irq/26-eth0-rx-31948-21aten_r1power_cu07:28:373
29715050,0irq/26-eth0-rx-28537-21diskstats08:38:383
29715050,0irq/26-eth0-rx-2604-21ssh11:46:083
29715050,0irq/26-eth0-rx-22119-21ssh10:38:363
29715050,0irq/26-eth0-rx-0-21swapper/312:17:523
29715050,0irq/26-eth0-rx-0-21swapper/311:53:463
29715050,0irq/26-eth0-rx-0-21swapper/310:53:433
29715050,0irq/26-eth0-rx-0-21swapper/310:36:393
29715050,0irq/26-eth0-rx-0-21swapper/310:28:423
29715050,0irq/26-eth0-rx-0-21swapper/310:24:573
29715050,0irq/26-eth0-rx-0-21swapper/310:13:443
29715050,0irq/26-eth0-rx-0-21swapper/309:30:113
29715050,0irq/26-eth0-rx-0-21swapper/309:23:293
29715050,0irq/26-eth0-rx-0-21swapper/309:08:423
29715050,0irq/26-eth0-rx-0-21swapper/308:52:583
259950,0migration/219119-21munin-node10:53:442
259950,0migration/214963-21kthreadcore11:33:412
259950,0migration/212041-21dump-pmu-power11:33:242
249950,0watchdog/220457-21cut09:53:422
249950,0watchdog/213930-21timerandwakeup08:23:472
179950,0migration/13836-21munin-node11:48:371
179950,0migration/130657-21munin-node09:18:471
179950,0migration/128863-21needreboot09:58:421
179950,0migration/126235-21munin-node08:58:411
179950,0migration/124616-21kthreadcore08:33:401
179950,0migration/124149-21kthreadcore11:38:431
179950,0migration/124127-21kthreadcore10:38:431
179950,0migration/121555-21needreboot09:33:431
179950,0migration/111758-21gltestperf12:13:371
179950,0migration/111484-21taskset07:09:571
169950,0watchdog/15155-21kthreadcore09:23:431
169950,0watchdog/12792-21grep10:43:421
169950,0watchdog/123098-21kthreadcore07:43:431
149950,0migration/08323-21kthreadcore11:28:420
149950,0migration/07163-21cpuspeed_turbos10:08:370
149950,0migration/06821-21fschecks_count07:33:400
149950,0migration/03955-21kthreadcore07:28:430
149950,0migration/028391-21cpuspeed_turbos08:38:370
149950,0migration/027087-21idleruntime07:48:390
149950,0migration/025290-21fschecks_time09:18:370
149950,0migration/021787-40yum-updatesd10:38:160
149950,0migration/019745-21aten_r1power_vo07:43:370
149950,0migration/019288-21fschecks_time07:18:390
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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