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2026-06-01 - 22:04

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 01, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450350,0irq/25-eth10-21swapper/306:49:263
1289723523,0sleep00-21swapper/006:51:060
1276323526,0sleep10-21swapper/106:49:351
1287723425,0sleep20-21swapper/206:50:562
339960,0migration/39810-21sh11:32:153
339960,0migration/32381-21sh10:48:123
339960,0migration/32292-21sh09:25:413
339960,0migration/319720-21sh08:59:033
339960,0migration/317769-21sh11:36:593
339960,0migration/316723-21sh12:15:053
339960,0migration/31565-21sh11:26:483
29725060,0irq/27-eth0-tx-29640-21munin-node08:19:200
29715060,0irq/26-eth0-rx-8822-21cut09:49:143
29715060,0irq/26-eth0-rx-6312-21kthreadcore10:29:133
29715060,0irq/26-eth0-rx-15449-21iostat_ios07:19:133
29715060,0irq/26-eth0-rx-13860-21grep11:54:123
29715060,0irq/26-eth0-rx-11950-21cpu09:54:053
149960,0migration/027629-21sh09:43:530
149960,0migration/024840-21sh12:20:200
149960,0migration/017901-21timerandwakeup09:14:190
149960,0migration/017212-21sh11:14:510
149960,0migration/01691-21sh11:47:510
149960,0migration/016435-21rt-features11:34:160
132119960,0cyclictest0-21swapper/211:56:352
132109966,0cyclictest0-21swapper/111:23:061
132109960,0cyclictest0-21swapper/110:39:351
132089960,0cyclictest0-21swapper/010:54:550
339950,0migration/39628-21runrttasks11:11:053
339950,0migration/37240-21kthreadcore10:49:133
339950,0migration/35642-21kthreadcore08:24:133
339950,0migration/35642-21kthreadcore08:24:133
339950,0migration/329911-21kthreadcore11:04:153
339950,0migration/329678-21kthreadcore09:04:123
339950,0migration/328519-21kthreadcore11:44:133
339950,0migration/32800-21latency_hist07:58:573
339950,0migration/326831-21munin-node12:04:083
339950,0migration/326227-21kthreadcore07:24:153
339950,0migration/326061-21runrttasks09:59:493
339950,0migration/322519-21kthreadcore10:19:153
339950,0migration/32063-21munin-node07:09:133
339950,0migration/319200-21fschecks_count11:39:103
339950,0migration/312174-21cpuspeed_turbos09:34:103
339950,0migration/311441-21cpuspeed_turbos10:34:083
339950,0migration/310003-21taskset10:10:303
29725050,0irq/27-eth0-tx-4313-21sshd08:44:350
29725050,0irq/27-eth0-tx-3141-21munin-node10:29:192
29725050,0irq/27-eth0-tx-2363-21munin-node11:49:142
29725050,0irq/27-eth0-tx-0-21swapper/212:04:432
29725050,0irq/27-eth0-tx-0-21swapper/211:14:222
29725050,0irq/27-eth0-tx-0-21swapper/211:11:302
29725050,0irq/27-eth0-tx-0-21swapper/211:00:002
29725050,0irq/27-eth0-tx-0-21swapper/209:50:392
29725050,0irq/27-eth0-tx-0-21swapper/209:12:232
29725050,0irq/27-eth0-tx-0-21swapper/209:06:142
29725050,0irq/27-eth0-tx-0-21swapper/008:54:130
29725050,0irq/27-eth0-tx-0-21swapper/008:11:340
29725050,0irq/27-eth0-tx-0-21swapper/007:49:150
29715050,0irq/26-eth0-rx-6559-21runrttasks12:02:553
29715050,0irq/26-eth0-rx-6559-21runrttasks09:29:523
29715050,0irq/26-eth0-rx-32500-21kthreadcore10:24:133
29715050,0irq/26-eth0-rx-27999-21kthreadcore08:39:153
29715050,0irq/26-eth0-rx-27935-21munin-node10:04:083
29715050,0irq/26-eth0-rx-25916-21unixbench-2d09:39:223
29715050,0irq/26-eth0-rx-20877-21kthreadcore08:09:153
29715050,0irq/26-eth0-rx-16296-21kthreadcore06:54:143
29715050,0irq/26-eth0-rx-14789-21kthreadcore08:54:133
29715050,0irq/26-eth0-rx-0-21swapper/311:49:143
29715050,0irq/26-eth0-rx-0-21swapper/311:01:173
29715050,0irq/26-eth0-rx-0-21swapper/310:43:533
29715050,0irq/26-eth0-rx-0-21swapper/309:48:273
29715050,0irq/26-eth0-rx-0-21swapper/309:20:093
29715050,0irq/26-eth0-rx-0-21swapper/309:15:383
29715050,0irq/26-eth0-rx-0-21swapper/309:09:153
29715050,0irq/26-eth0-rx-0-21swapper/308:33:593
29715050,0irq/26-eth0-rx-0-21swapper/308:19:153
27150,0ktimersoftd/20-21swapper/210:19:342
259950,0migration/232673-21latency10:44:152
259950,0migration/229564-21latency_hist08:18:572
259950,0migration/228354-21fschecks_time07:29:112
259950,0migration/227991-21unixbench_multi07:49:232
259950,0migration/227279-21sh10:03:192
259950,0migration/226897-21sh09:21:172
259950,0migration/226591-21taskset09:40:582
259950,0migration/22654-21sh09:46:592
259950,0migration/225825-21sh11:42:072
259950,0migration/225742-21sh12:02:162
259950,0migration/222137-21kthreadcore08:59:132
259950,0migration/221937-21latency_hist07:48:572
259950,0migration/220419-21kthreadcore12:19:122
259950,0migration/217739-21sh10:35:252
259950,0migration/211129-21fschecks_count11:34:082
249950,0watchdog/227575-21diskstats11:04:102
19150,0ktimersoftd/10-21swapper/111:03:091
19150,0ktimersoftd/10-21swapper/110:19:341
149950,0migration/09301-21sh11:51:180
149950,0migration/08815-21latency10:09:150
149950,0migration/06242-21kthreadcore11:29:120
149950,0migration/05348-21kthreadcore10:49:130
149950,0migration/05260-21kthreadcore09:09:140
149950,0migration/05071-21kthreadcore07:59:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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