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2026-07-08 - 06:14

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 08, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
552926160,0sleep20-21swapper/218:47:032
304450550,0irq/25-eth10-21swapper/318:47:343
554723522,0sleep00-21swapper/018:47:170
553822622,0sleep10-21swapper/118:47:101
58989965,0cyclictest0-21swapper/223:50:452
4160,0ktimersoftd/00-21swapper/022:03:380
4160,0ktimersoftd/00-21swapper/022:03:380
35160,0ktimersoftd/30-21swapper/321:05:293
339960,0migration/36604-21sh21:53:573
339960,0migration/36497-21sh21:33:083
339960,0migration/36249-21sh20:53:363
339960,0migration/35464-21sh23:12:353
339960,0migration/329226-21sh23:06:003
339960,0migration/316152-21kthreadcore23:20:433
339960,0migration/313939-21sh23:59:313
29715060,0irq/26-eth0-rx-6559-21runrttasks21:19:463
29715060,0irq/26-eth0-rx-14539-40yum-updatesd-he22:39:273
149960,0migration/06868-21sh22:15:060
149960,0migration/05745-21sh21:51:340
149960,0migration/030342-21sh23:49:530
149960,0migration/029775-21sh00:09:010
149960,0migration/029492-21sh23:27:090
149960,0migration/023626-21latency_hist21:25:280
149960,0migration/021994-21sh23:44:010
149960,0migration/013824-21sh21:56:320
149960,0migration/012615-21switchtime23:15:500
8215050,0irq/24-0000:00:15581-21latency_hist21:20:282
8215050,0irq/24-0000:00:14550-21awk23:20:262
58989955,0cyclictest0-21swapper/219:40:422
58979955,0cyclictest31401-21diskmemload23:39:461
58979955,0cyclictest30399-21ssh21:47:311
58979955,0cyclictest0-21swapper/121:15:401
58979955,0cyclictest0-21swapper/100:14:081
58979950,0cyclictest0-21swapper/122:47:441
58979950,0cyclictest0-21swapper/122:24:341
58979950,0cyclictest0-21swapper/122:10:321
58979950,0cyclictest0-21swapper/121:31:351
58979950,0cyclictest0-21swapper/121:01:291
58979950,0cyclictest0-21swapper/100:01:221
58969950,0cyclictest0-21swapper/023:36:580
58969950,0cyclictest0-21swapper/021:17:270
58969950,0cyclictest0-21swapper/021:03:150
4150,0ktimersoftd/00-21swapper/022:56:500
339950,0migration/39962-21kthreadcore22:55:463
339950,0migration/39519-21kthreadcore21:55:463
339950,0migration/35608-21taskset23:33:193
339950,0migration/35600-21sh23:53:393
339950,0migration/34645-21munin-node22:30:483
339950,0migration/33624-21kernelversion20:00:443
339950,0migration/330644-21taskset22:49:383
339950,0migration/330296-21taskset21:47:143
339950,0migration/326500-21taskset19:26:513
339950,0migration/323393-21turbostat.cron21:45:233
339950,0migration/32011-21taskset20:00:173
339950,0migration/319415-21sh19:20:493
339950,0migration/317722-21taskset20:36:513
339950,0migration/314452-21taskset19:44:523
29725050,0irq/27-eth0-tx-6348-21aten2.4-expect00:15:382
29725050,0irq/27-eth0-tx-6106-21munin-node18:50:430
29725050,0irq/27-eth0-tx-586-21kthreadcore23:10:412
29725050,0irq/27-eth0-tx-30571-21munin-node00:10:412
29725050,0irq/27-eth0-tx-22904-21munin-node23:25:432
29725050,0irq/27-eth0-tx-21375-21munin-node19:50:440
29725050,0irq/27-eth0-tx-18279-21munin-node20:40:440
29725050,0irq/27-eth0-tx-16023-21tr23:00:422
29725050,0irq/27-eth0-tx-10081-21kthreadcore22:55:462
29725050,0irq/27-eth0-tx-0-21swapper/222:40:402
29725050,0irq/27-eth0-tx-0-21swapper/221:52:242
29725050,0irq/27-eth0-tx-0-21swapper/220:56:052
29715050,0irq/26-eth0-rx-6517-21cpu00:15:393
29715050,0irq/26-eth0-rx-28096-21ntp_offset00:05:483
29715050,0irq/26-eth0-rx-23333-21fschecks_count23:25:403
29715050,0irq/26-eth0-rx-18084-21kthreadcore22:20:443
29715050,0irq/26-eth0-rx-17272-21kthreadcore23:40:443
29715050,0irq/26-eth0-rx-13307-21unixbench_singl22:15:503
29715050,0irq/26-eth0-rx-13043-21ssh23:36:233
29715050,0irq/26-eth0-rx-0-21swapper/323:45:363
29715050,0irq/26-eth0-rx-0-21swapper/323:15:473
29715050,0irq/26-eth0-rx-0-21swapper/323:01:533
29715050,0irq/26-eth0-rx-0-21swapper/322:40:433
29715050,0irq/26-eth0-rx-0-21swapper/322:26:073
29715050,0irq/26-eth0-rx-0-21swapper/322:10:393
29715050,0irq/26-eth0-rx-0-21swapper/322:02:443
29715050,0irq/26-eth0-rx-0-21swapper/322:02:443
29715050,0irq/26-eth0-rx-0-21swapper/321:36:013
29715050,0irq/26-eth0-rx-0-21swapper/321:23:503
29715050,0irq/26-eth0-rx-0-21swapper/321:10:423
29715050,0irq/26-eth0-rx-0-21swapper/321:03:043
29715050,0irq/26-eth0-rx-0-21swapper/300:02:173
27150,0ktimersoftd/20-21swapper/222:33:392
259950,0migration/29182-21kthreadcore19:15:452
259950,0migration/28258-21unixbench-2d20:00:512
259950,0migration/26396-21sh20:53:582
259950,0migration/26216-21kthreadcore19:35:462
259950,0migration/25866-21sh21:11:122
259950,0migration/24986-21munin-node22:10:502
259950,0migration/222130-21sh22:22:422
259950,0migration/221593-21unixbench_singl21:00:522
259950,0migration/211460-21missed_timers18:50:452
249950,0watchdog/230891-21unixbench_multi20:45:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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