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2026-09-11 - 10:12

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 Fri Sep 11, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450970,0irq/25-eth10-21swapper/318:42:183
2591726766,0sleep10-21swapper/118:40:091
2613225251,0sleep00-21swapper/018:42:360
2597223324,0sleep20-21swapper/218:40:462
339960,0migration/329427-21sh22:26:183
339960,0migration/324123-21taskset20:40:153
339960,0migration/32320-21latency19:59:333
339960,0migration/319632-21sh23:42:513
339960,0migration/313743-21sh22:38:353
339960,0migration/311403-21sh23:36:543
339960,0migration/310350-21sh23:55:253
29715060,0irq/26-eth0-rx-5277-21sensors21:49:353
29715060,0irq/26-eth0-rx-20335-21users22:39:403
29715060,0irq/26-eth0-rx-17379-21cut23:19:323
29715060,0irq/26-eth0-rx-0-21swapper/321:22:043
263419960,0cyclictest0-21swapper/121:14:381
263409960,0cyclictest0-21swapper/023:28:240
149960,0migration/028961-21munin-node23:29:280
35150,0ktimersoftd/30-21swapper/322:05:203
339950,0migration/38722-21aten_r1power_vo21:14:293
339950,0migration/3813-21kthreadcore23:09:333
339950,0migration/37268-21runrttasks21:32:453
339950,0migration/36948-21sh22:14:263
339950,0migration/35839-21kthreadcore18:49:333
339950,0migration/35401-21kthreadcore20:04:323
339950,0migration/34532-21taskset22:51:463
339950,0migration/330991-21kthreadcore19:09:333
339950,0migration/32951-21munin-node19:14:323
339950,0migration/32860-21kthreadcore22:29:353
339950,0migration/326869-21latency23:04:373
339950,0migration/325894-21kthreadcore23:24:343
339950,0migration/324621-21fschecks_time21:44:293
339950,0migration/324264-21kthreadcore22:44:323
339950,0migration/323400-21fschecks_time19:54:293
339950,0migration/322143-21munin-node19:04:323
339950,0migration/315843-21taskset19:48:133
339950,0migration/315686-21latency20:09:343
339950,0migration/315119-21latency_hist19:24:163
339950,0migration/31496-21kthreadcore20:24:343
339950,0migration/313565-21munin-node18:54:403
339950,0migration/312292-21munin-node20:34:303
339950,0migration/312092-21kthreadcore19:19:323
29725050,0irq/27-eth0-tx-6351-21python21:09:392
29725050,0irq/27-eth0-tx-5695-21ssh22:33:282
29725050,0irq/27-eth0-tx-32254-21if_eth1.222:09:322
29725050,0irq/27-eth0-tx-22810-21basename22:24:302
29725050,0irq/27-eth0-tx-15093-21ssh21:59:062
29725050,0irq/27-eth0-tx-0-21swapper/222:40:232
29725050,0irq/27-eth0-tx-0-21swapper/222:22:412
29725050,0irq/27-eth0-tx-0-21swapper/221:02:562
29725050,0irq/27-eth0-tx-0-21swapper/020:14:220
29715050,0irq/26-eth0-rx-17146-21fschecks_count20:59:293
29715050,0irq/26-eth0-rx-12257-21df_abs23:59:283
29715050,0irq/26-eth0-rx-10627-21kthreadcore21:54:333
29715050,0irq/26-eth0-rx-0-21swapper/323:49:163
29715050,0irq/26-eth0-rx-0-21swapper/323:47:203
29715050,0irq/26-eth0-rx-0-21swapper/323:32:033
29715050,0irq/26-eth0-rx-0-21swapper/322:19:353
29715050,0irq/26-eth0-rx-0-21swapper/322:00:503
263429955,0cyclictest0-21swapper/223:44:262
263429955,0cyclictest0-21swapper/221:26:002
263429950,0cyclictest0-21swapper/223:54:412
263429950,0cyclictest0-21swapper/200:10:272
263419955,0cyclictest24491-21diskmemload23:43:081
263419955,0cyclictest0-21swapper/122:59:281
263419955,0cyclictest0-21swapper/121:39:321
263419950,0cyclictest0-21swapper/123:22:481
263419950,0cyclictest0-21swapper/121:02:011
263419950,0cyclictest0-21swapper/100:11:411
263409955,0cyclictest0-21swapper/023:48:250
263409955,0cyclictest0-21swapper/023:41:290
263409955,0cyclictest0-21swapper/022:57:020
263409955,0cyclictest0-21swapper/021:23:510
263409955,0cyclictest0-21swapper/000:12:140
263409950,0cyclictest0-21swapper/023:58:400
263409950,0cyclictest0-21swapper/022:43:000
259950,0migration/21933-21irqcore18:49:312
259950,0migration/213771-21kthreadcore23:59:322
249950,0watchdog/231846-21latency18:44:352
249950,0watchdog/231762-21tr22:49:302
179950,0migration/130650-21munin-node19:59:321
179950,0migration/130070-21aten_r1power_cu22:49:241
179950,0migration/126790-21kthreadcore21:44:321
179950,0migration/122211-21kthreadcore20:39:341
179950,0migration/117414-21kthreadcore19:24:331
179950,0migration/114612-21latency_hist22:19:151
179950,0migration/11133-21kthreadcore22:29:341
179950,0migration/111029-21taskset20:32:341
149950,0migration/07659-21timerandwakeup19:14:380
149950,0migration/05925-21kthreadcore19:39:340
149950,0migration/030388-21sh21:45:340
149950,0migration/029502-21kthreadcore21:04:340
149950,0migration/024365-21kthreadcore19:29:320
149950,0migration/022921-21sh22:44:290
149950,0migration/013854-21kthreadcore19:44:330
149950,0migration/013255-21kthreadcore20:34:320
8215040,0irq/24-0000:00:0-21swapper/223:24:302
339940,0migration/38611-21kthreadcore20:29:333
339940,0migration/329224-21kthreadcore20:44:323
339940,0migration/324339-21fschecks_time20:19:293
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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