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2026-07-05 - 05:12

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 Sun Jul 05, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
413828786,0sleep20-21swapper/218:49:002
409323824,0sleep00-21swapper/018:48:300
416123727,0sleep30-21swapper/318:49:173
401423324,0sleep10-21swapper/118:47:351
8215060,0irq/24-0000:00:9865-21munin-run23:15:442
43659965,0cyclictest24972-21grep21:01:072
43649966,0cyclictest2463-21diskmemload23:52:341
43649966,0cyclictest0-21swapper/118:50:581
43649960,0cyclictest2463-21diskmemload23:32:231
43649960,0cyclictest0-21swapper/120:41:001
43639965,0cyclictest28531-21ps22:06:000
43639965,0cyclictest11117-21kthreadcore00:16:010
339960,0migration/326090-21sh21:03:223
339960,0migration/325832-21sh23:45:333
339960,0migration/321640-21kthreadcore23:01:013
339960,0migration/311001-21aten_r1power_cu22:15:543
29715060,0irq/26-eth0-rx-28393-21irqrtprio22:05:593
29715060,0irq/26-eth0-rx-25081-21ssh00:03:493
29715060,0irq/26-eth0-rx-15368-21tr22:36:023
29715060,0irq/26-eth0-rx-0-21swapper/323:31:353
29715060,0irq/26-eth0-rx-0-21swapper/321:11:033
149960,0migration/09100-21taskset23:54:130
149960,0migration/026323-21sh22:04:010
149960,0migration/025292-21sh00:04:270
149960,0migration/025054-21sh23:43:220
149960,0migration/018674-21sh21:39:390
149960,0migration/018033-21taskset21:17:260
149960,0migration/017032-21timerandwakeup18:56:080
43659955,0cyclictest0-21swapper/223:08:042
43659955,0cyclictest0-21swapper/222:56:332
43659955,0cyclictest0-21swapper/221:44:402
43659955,0cyclictest0-21swapper/200:07:582
43659950,0cyclictest0-21swapper/222:53:052
43659950,0cyclictest0-21swapper/222:16:122
43659950,0cyclictest0-21swapper/221:25:162
43649955,0cyclictest0-21swapper/123:00:231
43649955,0cyclictest0-21swapper/121:14:261
43649955,0cyclictest0-21swapper/121:05:461
43649954,0cyclictest13124-21awk19:21:001
43649950,0cyclictest0-21swapper/122:18:171
43639955,0cyclictest0-21swapper/022:24:270
43639950,0cyclictest0-21swapper/023:36:590
43639950,0cyclictest0-21swapper/023:13:390
43639950,0cyclictest0-21swapper/023:09:040
43639950,0cyclictest0-21swapper/021:56:430
43639950,0cyclictest0-21swapper/021:49:090
339950,0migration/39020-21kthreadcore20:06:003
339950,0migration/37559-21switchtime00:11:083
339950,0migration/36790-21kthreadcore18:51:013
339950,0migration/35237-21kthreadcore20:51:033
339950,0migration/3512-21munin-node20:21:033
339950,0migration/332413-21timerandwakeup22:46:083
339950,0migration/33140-21kthreadcore19:11:033
339950,0migration/330251-21kthreadcore19:56:013
339950,0migration/329078-21fschecks_time20:45:573
339950,0migration/327162-21diskmemload21:25:313
339950,0migration/326791-21fschecks_time23:45:583
339950,0migration/32657-21diskmemload23:50:583
339950,0migration/326408-21kthreadcore20:41:023
339950,0migration/323293-21kthreadcore22:41:033
339950,0migration/323293-21kthreadcore22:41:033
339950,0migration/32317-21kthreadcore19:36:023
339950,0migration/32213-21munin-node22:50:533
339950,0migration/321009-21kthreadcore19:01:023
339950,0migration/320993-21kthreadcore19:26:013
339950,0migration/320632-21taskset20:15:313
339950,0migration/31785-21taskset21:08:053
339950,0migration/317297-21timerandwakeup21:16:093
339950,0migration/313329-21kthreadcore18:56:023
339950,0migration/313146-21sh20:56:033
339950,0migration/311741-21fschecks_time21:55:583
339950,0migration/311645-21kernelversion22:56:013
339950,0migration/311604-21taskset19:16:113
29725050,0irq/27-eth0-tx-3560-21fschecks_time22:11:002
29725050,0irq/27-eth0-tx-30685-21kthreadcore21:46:012
29725050,0irq/27-eth0-tx-2584-21ssh21:10:092
29725050,0irq/27-eth0-tx-18218-21munin-node23:20:592
29725050,0irq/27-eth0-tx-16865-21ssh22:36:532
29725050,0irq/27-eth0-tx-11314-21munin-node21:35:572
29725050,0irq/27-eth0-tx-0-21swapper/222:24:072
29725050,0irq/27-eth0-tx-0-21swapper/020:20:550
29725050,0irq/27-eth0-tx-0-21swapper/019:01:030
29715050,0irq/26-eth0-rx-28896-21kthreadcore23:26:013
29715050,0irq/26-eth0-rx-25242-21ssh23:23:393
29715050,0irq/26-eth0-rx-25116-21cut20:16:013
29715050,0irq/26-eth0-rx-10008-21cpuspeed_turbos00:15:563
29715050,0irq/26-eth0-rx-0-21swapper/323:36:523
29715050,0irq/26-eth0-rx-0-21swapper/323:06:043
29715050,0irq/26-eth0-rx-0-21swapper/322:31:003
29715050,0irq/26-eth0-rx-0-21swapper/322:25:593
29715050,0irq/26-eth0-rx-0-21swapper/322:21:123
29715050,0irq/26-eth0-rx-0-21swapper/322:15:103
29715050,0irq/26-eth0-rx-0-21swapper/322:00:563
29715050,0irq/26-eth0-rx-0-21swapper/321:30:253
29715050,0irq/26-eth0-rx-0-21swapper/300:06:083
259950,0migration/28765-21sh23:53:152
259950,0migration/23328-21aten_r1power_po21:30:552
259950,0migration/23256-21kthreadcore20:01:022
259950,0migration/232476-21unixbench_multi19:56:072
259950,0migration/23233-21kthreadcore20:26:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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