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2026-07-20 - 12:13

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 Jul 20, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3060023723,0sleep00-21swapper/018:48:320
304450350,0irq/25-eth10-21swapper/318:45:323
3029323526,0sleep20-21swapper/218:44:582
2429823424,0sleep10-21swapper/118:44:251
339970,0migration/327908-21sh21:04:533
4160,0ktimersoftd/032404-21latency19:59:360
339960,0migration/37747-21idleruntime23:29:323
339960,0migration/317454-21sh22:17:333
339960,0migration/313637-21sh21:34:473
307359960,0cyclictest0-21swapper/221:44:302
307359960,0cyclictest0-21swapper/219:59:302
307339966,0cyclictest28828-21diskmemload21:25:211
307339960,0cyclictest0-21swapper/123:37:191
29715060,0irq/26-eth0-rx-4034-21cut22:29:343
29715060,0irq/26-eth0-rx-3373-21ssh23:04:443
29715060,0irq/26-eth0-rx-15778-21grep22:34:363
29715060,0irq/26-eth0-rx-0-21swapper/322:01:303
149960,0migration/07371-21sh00:04:590
149960,0migration/024802-21sh22:03:080
149960,0migration/022925-21taskset23:38:080
149960,0migration/016677-21sh21:58:500
149960,0migration/010439-21cpuspeed_turbos22:14:300
4150,0ktimersoftd/00-21swapper/023:56:240
4150,0ktimersoftd/00-21swapper/021:14:480
35150,0ktimersoftd/30-21swapper/323:20:113
35150,0ktimersoftd/30-21swapper/319:09:213
339950,0migration/38043-21munin-node19:44:383
339950,0migration/35088-21munin-node19:14:413
339950,0migration/3436-21munin-node21:49:303
339950,0migration/33795-21taskset22:48:573
339950,0migration/331975-21irqcore23:24:343
339950,0migration/329691-21kthreadcore19:59:353
339950,0migration/327775-21munin-node22:24:343
339950,0migration/322456-21kthreadcore22:39:363
339950,0migration/319012-21munin-node19:04:323
339950,0migration/31772-21kthreadcore18:49:363
339950,0migration/317410-21kthreadcore20:39:383
339950,0migration/314873-21aten_r1power_fr20:14:303
339950,0migration/312782-21munin-node18:59:353
339950,0migration/311717-21ntp_offset19:19:403
339950,0migration/310628-21kthreadcore21:54:363
307359955,0cyclictest598-21kthreadcore20:24:342
307359955,0cyclictest0-21swapper/221:29:502
307359954,0cyclictest18764-21kthreadcore21:19:352
307359950,0cyclictest0-21swapper/221:13:172
307339955,0cyclictest0-21swapper/123:47:431
307339955,0cyclictest0-21swapper/121:09:541
307339950,0cyclictest0-21swapper/123:51:491
307329955,0cyclictest0-21swapper/023:21:060
307329955,0cyclictest0-21swapper/022:44:210
307329952,0cyclictest27877-21munin-run20:24:190
307329950,0cyclictest0-21swapper/020:56:220
29725050,0irq/27-eth0-tx-9079-21munin-node20:34:350
29725050,0irq/27-eth0-tx-3514-21snmpd19:47:490
29725050,0irq/27-eth0-tx-26780-21open_inodes22:59:392
29725050,0irq/27-eth0-tx-18619-21munin-node19:04:360
29725050,0irq/27-eth0-tx-13287-21munin-node20:59:442
29715050,0irq/26-eth0-rx-5443-21irqrtprio22:49:343
29715050,0irq/26-eth0-rx-5125-21kthreadcore22:09:373
29715050,0irq/26-eth0-rx-26935-21kthreadcore22:04:343
29715050,0irq/26-eth0-rx-22639-21cut22:59:363
29715050,0irq/26-eth0-rx-21885-21kthreadcore23:54:363
29715050,0irq/26-eth0-rx-21665-21cpuspeed_turbos20:19:303
29715050,0irq/26-eth0-rx-16769-21sh00:12:253
29715050,0irq/26-eth0-rx-16148-21cut20:59:453
29715050,0irq/26-eth0-rx-14289-21awk19:49:323
29715050,0irq/26-eth0-rx-10035-21if_eth1.220:34:353
29715050,0irq/26-eth0-rx-0-21swapper/323:49:583
29715050,0irq/26-eth0-rx-0-21swapper/323:44:353
29715050,0irq/26-eth0-rx-0-21swapper/323:44:053
29715050,0irq/26-eth0-rx-0-21swapper/323:14:343
29715050,0irq/26-eth0-rx-0-21swapper/323:09:493
29715050,0irq/26-eth0-rx-0-21swapper/321:48:523
29715050,0irq/26-eth0-rx-0-21swapper/321:42:103
29715050,0irq/26-eth0-rx-0-21swapper/321:26:543
29715050,0irq/26-eth0-rx-0-21swapper/321:22:213
29715050,0irq/26-eth0-rx-0-21swapper/321:16:033
29715050,0irq/26-eth0-rx-0-21swapper/320:49:313
29715050,0irq/26-eth0-rx-0-21swapper/300:14:533
29715050,0irq/26-eth0-rx-0-21swapper/300:08:343
29715050,0irq/26-eth0-rx-0-21swapper/300:01:553
27150,0ktimersoftd/20-21swapper/221:09:072
249950,0watchdog/223018-21kthreadcore22:39:362
19150,0ktimersoftd/10-21swapper/119:09:211
179950,0migration/125330-21latency_hist22:04:181
179950,0migration/122843-21forks20:44:321
179950,0migration/120926-21sh21:20:151
179950,0migration/118442-21fschecks_time00:14:301
179950,0migration/117555-21sh00:14:161
169950,0watchdog/116509-21kthreadcore22:34:361
149950,0migration/09719-21kthreadcore23:29:350
149950,0migration/07199-21munin-node22:09:380
149950,0migration/06303-21timerandwakeup21:49:410
149950,0migration/05714-21munin-node23:09:300
149950,0migration/0567-21sh00:04:080
149950,0migration/04997-21sh23:08:300
149950,0migration/030021-21kthreadcore19:34:380
149950,0migration/026388-21irqcore19:09:370
149950,0migration/025578-21kthreadcore22:59:370
149950,0migration/025066-21kthreadcore21:24:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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