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2026-08-07 - 21:24

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 Aug 07, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2715123625,0sleep30-21swapper/306:46:403
2694523624,0sleep00-21swapper/006:44:170
2704723425,0sleep10-21swapper/106:45:301
2701323423,0sleep20-21swapper/206:45:032
35160,0ktimersoftd/30-21swapper/311:53:163
339960,0migration/36544-21munin-node11:37:483
339960,0migration/331072-21fschecks_time08:02:473
339960,0migration/330590-21sh10:09:223
339960,0migration/323538-21sh09:03:043
339960,0migration/316349-21sh09:00:393
339960,0migration/316051-21sh09:41:453
339960,0migration/314175-21switchtime06:57:563
29715060,0irq/26-eth0-rx-9616-21df_inode09:17:443
29715060,0irq/26-eth0-rx-476-21iostat_ios10:12:493
29715060,0irq/26-eth0-rx-0-21swapper/309:07:483
273039960,0cyclictest6662-21iperf08:17:472
273039960,0cyclictest0-21swapper/209:19:072
273019966,0cyclictest0-21swapper/009:32:500
27160,0ktimersoftd/20-21swapper/211:53:162
19160,0ktimersoftd/10-21swapper/111:53:161
149960,0migration/07156-21sh09:55:290
149960,0migration/031810-21sh08:48:050
149960,0migration/022787-21sh09:43:040
149960,0migration/020326-21sh11:24:090
149960,0migration/018868-21idleruntime08:17:460
339950,0migration/39564-21kthreadcore10:37:493
339950,0migration/38092-21runrttasks09:57:363
339950,0migration/37456-21kthreadcore08:07:513
339950,0migration/34327-21missed_timers10:32:513
339950,0migration/330775-21aten_r1power_en10:52:433
339950,0migration/330671-21munin-node08:22:563
339950,0migration/329740-21taskset07:57:573
339950,0migration/327910-21munin-node06:47:453
339950,0migration/327326-21kthreadcore10:27:493
339950,0migration/326690-21kthreadcore09:47:493
339950,0migration/323800-21timerandwakeup08:17:543
339950,0migration/323769-21kthreadcore11:07:503
339950,0migration/323064-21timerandwakeup09:22:563
339950,0migration/322838-21munin-node10:47:433
339950,0migration/322271-21fschecks_count07:07:473
339950,0migration/321393-21runrttasks10:44:133
339950,0migration/319885-21munin-node08:42:453
339950,0migration/317267-21fschecks_time09:42:473
339950,0migration/314095-21runrttasks10:19:223
339950,0migration/312621-21kthreadcore07:47:503
339950,0migration/31229-21kthreadcore11:32:513
29725050,0irq/27-eth0-tx-6878-21open_inodes09:12:542
29725050,0irq/27-eth0-tx-28692-21ssh11:52:012
29725050,0irq/27-eth0-tx-11398-21munin-node08:12:490
29725050,0irq/27-eth0-tx-0-21swapper/211:19:462
29725050,0irq/27-eth0-tx-0-21swapper/008:22:530
29725050,0irq/27-eth0-tx-0-21swapper/008:07:490
29725050,0irq/27-eth0-tx-0-21swapper/007:37:470
29725050,0irq/27-eth0-tx-0-21swapper/007:18:090
29715050,0irq/26-eth0-rx-6969-21irqstats08:32:483
29715050,0irq/26-eth0-rx-31638-21grep07:37:493
29715050,0irq/26-eth0-rx-16478-21diskstats10:02:453
29715050,0irq/26-eth0-rx-0-21swapper/312:07:473
29715050,0irq/26-eth0-rx-0-21swapper/312:02:503
29715050,0irq/26-eth0-rx-0-21swapper/311:49:183
29715050,0irq/26-eth0-rx-0-21swapper/311:27:483
29715050,0irq/26-eth0-rx-0-21swapper/311:16:073
29715050,0irq/26-eth0-rx-0-21swapper/311:02:463
29715050,0irq/26-eth0-rx-0-21swapper/310:57:503
29715050,0irq/26-eth0-rx-0-21swapper/309:35:013
29715050,0irq/26-eth0-rx-0-21swapper/309:30:383
29715050,0irq/26-eth0-rx-0-21swapper/309:13:473
29715050,0irq/26-eth0-rx-0-21swapper/308:52:493
29715050,0irq/26-eth0-rx-0-21swapper/308:49:503
29715050,0irq/26-eth0-rx-0-21swapper/307:42:553
29715050,0irq/26-eth0-rx-0-21swapper/307:42:553
273039955,0cyclictest0-21swapper/211:15:372
273039954,0cyclictest330-21awk10:12:472
273039950,0cyclictest0-21swapper/210:56:522
273039950,0cyclictest0-21swapper/210:01:312
273039950,0cyclictest0-21swapper/208:47:442
273039950,0cyclictest0-21swapper/207:57:552
273029955,0cyclictest0-21swapper/110:06:171
273029950,0cyclictest0-21swapper/112:11:381
273029950,0cyclictest0-21swapper/109:23:341
273029950,0cyclictest0-21swapper/108:22:521
273019954,0cyclictest15665-21kworker/0:107:29:270
249950,0watchdog/222542-21idleruntime11:27:462
179950,0migration/18277-21aten_r1power_vo09:57:431
179950,0migration/15998-21cpuspeed_turbos11:17:441
179950,0migration/125568-21latency_hist08:47:321
179950,0migration/12353-21fschecks_time06:52:461
179950,0migration/116250-21timerwakeupswit07:47:551
179950,0migration/114681-21if_eth011:22:481
179950,0migration/111975-21taskset12:01:001
169950,0watchdog/132107-21ssh09:52:111
169950,0watchdog/127039-21cut11:07:511
149950,0migration/08852-21kthreadcore10:37:490
149950,0migration/08758-21taskset09:17:010
149950,0migration/07329-21kthreadcore11:37:480
149950,0migration/06683-21taskset10:16:000
149950,0migration/0545-21kthreadcore08:27:490
149950,0migration/04718-21munin-node07:42:520
149950,0migration/04718-21munin-node07:42:520
149950,0migration/03984-21kthreadcore08:52:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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