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2026-06-08 - 01:49

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 Jun 08, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
351780,0ktimersoftd/39920-21perf18:53:103
1643323624,0sleep10-21swapper/118:52:491
1625923424,0sleep20-21swapper/218:50:462
1611223127,0sleep00-21swapper/018:49:040
165549976,0cyclictest29753-21ssh23:42:330
35160,0ktimersoftd/30-21swapper/322:56:363
35160,0ktimersoftd/30-21swapper/322:49:213
339960,0migration/36830-21sh21:27:463
339960,0migration/330319-21sh23:02:563
339960,0migration/328603-21sh00:20:183
339960,0migration/321580-21sh22:15:123
339960,0migration/321510-21sh21:54:273
29725060,0irq/27-eth0-tx-19768-21munin-node20:08:320
29715060,0irq/26-eth0-rx-4178-21python23:03:413
259960,0migration/222320-21sh23:38:322
165579960,0cyclictest0-21swapper/221:50:002
165549960,0cyclictest0-21swapper/021:00:000
149960,0migration/020936-21sh23:35:210
149960,0migration/020497-21sh23:54:200
149960,0migration/012995-21sh22:49:140
339950,0migration/39572-21irqrtprio20:48:353
339950,0migration/37261-21kthreadcore19:33:363
339950,0migration/332311-21if_eth021:43:343
339950,0migration/327671-21munin-node23:58:393
339950,0migration/325007-21munin-node19:23:333
339950,0migration/32317-21kthreadcore20:18:373
339950,0migration/320896-21sh21:13:393
339950,0migration/319999-21cpuspeed_turbos20:08:333
339950,0migration/317569-21taskset19:18:013
339950,0migration/316339-21kthreadcore20:28:363
339950,0migration/315643-21munin-node23:13:343
339950,0migration/315170-21aten_r1power_po20:53:303
339950,0migration/313700-21taskset21:09:553
339950,0migration/313647-21latency_hist00:13:193
339950,0migration/313115-21runrttasks23:10:193
339950,0migration/310072-21kthreadcore20:23:373
29725050,0irq/27-eth0-tx-6439-21munin-node23:08:412
29725050,0irq/27-eth0-tx-5831-21munin-node00:08:402
29725050,0irq/27-eth0-tx-31638-21cpuspeed_turbos21:43:312
29725050,0irq/27-eth0-tx-31200-21irqcore00:03:352
29725050,0irq/27-eth0-tx-25510-21munin-node19:48:400
29725050,0irq/27-eth0-tx-15066-21munin-node20:53:340
29725050,0irq/27-eth0-tx-14398-21ssh22:12:352
29725050,0irq/27-eth0-tx-13068-21ssh23:30:482
29725050,0irq/27-eth0-tx-0-21swapper/223:19:252
29725050,0irq/27-eth0-tx-0-21swapper/222:52:462
29725050,0irq/27-eth0-tx-0-21swapper/221:58:352
29725050,0irq/27-eth0-tx-0-21swapper/221:53:372
29725050,0irq/27-eth0-tx-0-21swapper/019:43:520
29725050,0irq/27-eth0-tx-0-21swapper/019:33:310
29725050,0irq/27-eth0-tx-0-21swapper/019:08:450
29725050,0irq/27-eth0-tx-0-21swapper/019:08:450
29715050,0irq/26-eth0-rx-9503-21kthreadcore21:28:363
29715050,0irq/26-eth0-rx-7151-21grep22:08:323
29715050,0irq/26-eth0-rx-6453-21diskstats23:48:323
29715050,0irq/26-eth0-rx-5950-21latency_hist23:28:193
29715050,0irq/26-eth0-rx-4368-21open_inodes22:03:393
29715050,0irq/26-eth0-rx-30105-21grep20:13:373
29715050,0irq/26-eth0-rx-29084-21sed22:18:433
29715050,0irq/26-eth0-rx-23565-21grep22:38:343
29715050,0irq/26-eth0-rx-13226-21ssh23:31:153
29715050,0irq/26-eth0-rx-12498-21mdstat21:48:383
29715050,0irq/26-eth0-rx-0-21swapper/323:19:273
29715050,0irq/26-eth0-rx-0-21swapper/322:45:133
29715050,0irq/26-eth0-rx-0-21swapper/322:28:593
29715050,0irq/26-eth0-rx-0-21swapper/321:38:363
29715050,0irq/26-eth0-rx-0-21swapper/321:35:503
29715050,0irq/26-eth0-rx-0-21swapper/320:59:343
29715050,0irq/26-eth0-rx-0-21swapper/319:48:323
259950,0migration/25193-21runrttasks22:24:502
259950,0migration/227228-21kthreadcore19:48:362
259950,0migration/226761-21munin-node20:33:492
259950,0migration/219864-21missed_timers23:13:372
259950,0migration/218669-21kthreadcore23:53:372
259950,0migration/215490-21hwlatdetect22:53:342
249950,0watchdog/212742-21needreboot21:28:382
179950,0migration/130390-21aten_r1power_fr23:43:321
179950,0migration/128477-21latency21:58:371
165579955,0cyclictest0-21swapper/223:25:522
165579955,0cyclictest0-21swapper/200:00:042
165579954,0cyclictest24045-21sed20:58:362
165579950,0cyclictest0-21swapper/221:03:392
165569955,0cyclictest14818-21diskmemload22:47:371
165569955,0cyclictest14818-21diskmemload22:38:101
165569955,0cyclictest0-21swapper/121:38:341
165569950,0cyclictest0-21swapper/121:53:521
165549955,0cyclictest0-21swapper/023:04:140
165549950,0cyclictest0-21swapper/022:17:060
149950,0migration/08385-21kthreadcore00:08:360
149950,0migration/07849-21fschecks_count21:28:320
149950,0migration/07349-21irqcore23:28:340
149950,0migration/05605-21latency_hist00:08:190
149950,0migration/05582-21taskset21:44:470
149950,0migration/05000-21sendmail_mailqu21:23:420
149950,0migration/031533-21fschecks_count22:23:330
149950,0migration/030283-21kthreadcore20:38:360
149950,0migration/030226-21latency_hist23:43:190
149950,0migration/028030-21kthreadcore22:18:370
149950,0migration/027144-21gltestperf20:13:330
149950,0migration/026489-21sh23:58:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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