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2026-05-04 - 15:45

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 Mon May 04, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450410,0irq/25-eth10-21swapper/306:51:533
562123626,0sleep20-21swapper/206:52:262
594723430,0sleep00-21swapper/006:56:130
586822824,0sleep10-21swapper/106:55:181
60549966,0cyclictest4228-21diskmemload11:43:482
60549965,0cyclictest30506-21tr11:31:532
60549960,0cyclictest0-21swapper/210:14:152
60549960,0cyclictest0-21swapper/208:58:252
60499965,0cyclictest13908-21ps09:01:530
339960,0migration/36768-21taskset06:56:503
339960,0migration/318835-21sh10:22:373
339960,0migration/31671-21sh11:33:363
29715060,0irq/26-eth0-rx-18192-21ssh11:44:573
60549955,0cyclictest0-21swapper/212:01:562
60549954,0cyclictest22828-21tr07:56:532
60549954,0cyclictest20588-21crond09:06:362
60549954,0cyclictest2009-21crond12:16:352
60549950,0cyclictest0-21swapper/212:21:382
60549950,0cyclictest0-21swapper/207:42:072
60519955,0cyclictest0-21swapper/107:31:571
60499955,0cyclictest0-21swapper/009:16:480
60499950,0cyclictest0-21swapper/009:51:580
4150,0ktimersoftd/00-21swapper/009:28:460
4150,0ktimersoftd/00-21swapper/007:16:390
339950,0migration/38826-21fschecks_time07:46:503
339950,0migration/36966-21kthreadcore11:36:543
339950,0migration/36241-21kthreadcore12:16:533
339950,0migration/35114-21kthreadcore07:41:523
339950,0migration/34975-21fschecks_time10:16:483
339950,0migration/33856-21taskset08:52:293
339950,0migration/331061-21kthreadcore07:36:533
339950,0migration/330828-21kthreadcore11:51:523
339950,0migration/327275-21fschecks_time12:11:493
339950,0migration/326413-21kthreadcore08:21:533
339950,0migration/325865-21diskmemload10:26:543
339950,0migration/325341-21kthreadcore07:56:543
339950,0migration/321454-21kthreadcore07:06:533
339950,0migration/320868-21kthreadcore11:26:503
339950,0migration/31976-21taskset10:52:393
339950,0migration/319068-21switchtime09:22:003
339950,0migration/316708-21kthreadcore11:01:543
339950,0migration/313972-21if_eth009:41:513
339950,0migration/313404-21kthreadcore11:21:533
339950,0migration/312837-21munin-node10:01:473
339950,0migration/311582-21taskset09:38:103
29725050,0irq/27-eth0-tx-4387-21munin-node10:16:462
29725050,0irq/27-eth0-tx-28746-21ssh09:11:282
29725050,0irq/27-eth0-tx-2461-21telnet08:06:480
29725050,0irq/27-eth0-tx-22036-21kthreadcore11:06:522
29725050,0irq/27-eth0-tx-19696-21if_eth1.212:06:502
29725050,0irq/27-eth0-tx-10323-21sendmail_mailqu08:56:580
29725050,0irq/27-eth0-tx-0-21swapper/210:39:122
29725050,0irq/27-eth0-tx-0-21swapper/209:40:202
29725050,0irq/27-eth0-tx-0-21swapper/209:33:142
29725050,0irq/27-eth0-tx-0-21swapper/209:21:302
29715050,0irq/26-eth0-rx-6559-21runrttasks11:16:473
29715050,0irq/26-eth0-rx-5774-21interrupts09:56:523
29715050,0irq/26-eth0-rx-3482-21ssh10:35:413
29715050,0irq/26-eth0-rx-29830-21sort09:31:493
29715050,0irq/26-eth0-rx-2931-21cpuspeed_turbos11:56:473
29715050,0irq/26-eth0-rx-27090-21munin-node09:26:573
29715050,0irq/26-eth0-rx-26438-21open_files09:06:563
29715050,0irq/26-eth0-rx-20013-21irqstats12:06:513
29715050,0irq/26-eth0-rx-1756-21ssh11:12:553
29715050,0irq/26-eth0-rx-12841-21gltestperf10:41:503
29715050,0irq/26-eth0-rx-0-21swapper/312:03:193
29715050,0irq/26-eth0-rx-0-21swapper/311:50:523
29715050,0irq/26-eth0-rx-0-21swapper/311:08:463
29715050,0irq/26-eth0-rx-0-21swapper/310:58:163
29715050,0irq/26-eth0-rx-0-21swapper/310:11:523
29715050,0irq/26-eth0-rx-0-21swapper/309:46:533
29715050,0irq/26-eth0-rx-0-21swapper/309:06:053
29715050,0irq/26-eth0-rx-0-21swapper/308:59:463
29715050,0irq/26-eth0-rx-0-21swapper/308:46:523
27150,0ktimersoftd/20-21swapper/207:16:392
259950,0migration/24701-21latency_hist09:16:362
259950,0migration/232709-21latency_hist07:16:372
259950,0migration/229267-21hwlatdetect10:31:512
259950,0migration/22595-21latency_hist11:56:352
259950,0migration/22244-21taskset12:16:382
259950,0migration/210731-21taskset11:20:292
249950,0watchdog/24228-21diskmemload10:56:502
19150,0ktimersoftd/10-21swapper/112:06:361
19150,0ktimersoftd/10-21swapper/109:28:461
19150,0ktimersoftd/10-21swapper/107:16:391
179950,0migration/16133-21kthreadcore08:06:541
179950,0migration/15820-21kthreadcore11:56:521
179950,0migration/131849-21kthreadcore09:51:531
179950,0migration/131324-21kthreadcore09:11:531
179950,0migration/127611-21kthreadcore08:21:531
179950,0migration/126466-21munin-node09:06:571
179950,0migration/120289-21taskset10:05:591
179950,0migration/120099-21fschecks_count11:06:481
179950,0migration/120015-21taskset09:44:191
179950,0migration/114222-21if_eth1.309:21:521
169950,0watchdog/12815-21kthreadcore08:51:541
169950,0watchdog/115855-21aten_r1power_cu08:16:471
149950,0migration/019445-21sh09:22:110
149950,0migration/016509-21kthreadcore09:41:530
60549944,0cyclictest0-21swapper/209:41:462
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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