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2026-05-19 - 23:33

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 Tue May 19, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
749623626,0sleep30-21swapper/306:52:353
745423425,0sleep10-21swapper/106:52:051
736923423,0sleep00-21swapper/006:51:030
760323228,0sleep20-21swapper/206:53:462
35170,0ktimersoftd/30-21swapper/309:13:273
77959966,0cyclictest0-21swapper/109:10:281
4160,0ktimersoftd/00-21swapper/009:13:270
35160,0ktimersoftd/30-21swapper/311:10:593
339960,0migration/331960-21munin-node09:50:253
339960,0migration/329698-21sh09:07:503
339960,0migration/329043-21sh10:27:213
339960,0migration/328356-21taskset10:46:363
339960,0migration/311765-21sh12:19:583
29725060,0irq/27-eth0-tx-10914-21munin-node08:10:310
29715060,0irq/26-eth0-rx-9977-21aten2.4-expect07:45:223
29715060,0irq/26-eth0-rx-11305-21tr09:55:263
29715060,0irq/26-eth0-rx-0-21swapper/311:46:373
27160,0ktimersoftd/20-21swapper/209:13:272
149960,0migration/027937-21sh11:48:250
8215050,0irq/24-0000:00:18337-21latency_hist08:40:112
8215050,0irq/24-0000:00:17522-21memory12:20:312
77969955,0cyclictest0-21swapper/208:55:492
77969950,0cyclictest0-21swapper/211:48:562
77959955,0cyclictest0-21swapper/111:19:161
77959955,0cyclictest0-21swapper/110:05:481
77959955,0cyclictest0-21swapper/107:35:231
77959954,0cyclictest3556-21lldpd07:07:391
77959954,0cyclictest0-21swapper/108:59:251
77959950,0cyclictest0-21swapper/112:17:451
77959950,0cyclictest0-21swapper/110:20:371
77949955,0cyclictest0-21swapper/010:33:440
339950,0migration/39436-21kthreadcore09:15:283
339950,0migration/38278-21kthreadcore11:15:273
339950,0migration/37148-21munin-node08:55:263
339950,0migration/36411-21fschecks_count10:35:243
339950,0migration/36245-21kthreadcore11:35:263
339950,0migration/33765-21taskset08:02:433
339950,0migration/332219-21if_err_eth009:30:253
339950,0migration/32594-21switchtime11:30:323
339950,0migration/325383-21aten2.4-expect08:45:243
339950,0migration/322485-21kthreadcore08:40:313
339950,0migration/322035-21runrttasks10:04:153
339950,0migration/321400-21aten_r1power_fr07:05:233
339950,0migration/320165-21kthreadcore08:15:283
339950,0migration/319984-21unixbench_singl10:40:353
339950,0migration/317958-21kthreadcore09:40:293
339950,0migration/316509-21munin-node07:25:243
339950,0migration/315381-21munin-node07:00:263
339950,0migration/314435-21munin-node07:20:303
339950,0migration/311502-21kthreadcore10:15:273
339950,0migration/311013-21timerandwakeup08:30:333
339950,0migration/310883-21kthreadcore06:55:283
339950,0migration/310463-21kthreadcore09:35:283
29725050,0irq/27-eth0-tx-5060-21ssh09:30:352
29725050,0irq/27-eth0-tx-23384-21perl09:05:232
29725050,0irq/27-eth0-tx-22309-21munin-node07:30:230
29725050,0irq/27-eth0-tx-14279-21ssh10:20:132
29725050,0irq/27-eth0-tx-13540-21ssh09:36:352
29725050,0irq/27-eth0-tx-12856-21munin-node11:40:282
29725050,0irq/27-eth0-tx-11100-21ssh12:18:012
29725050,0irq/27-eth0-tx-0-21swapper/212:11:342
29725050,0irq/27-eth0-tx-0-21swapper/212:04:182
29725050,0irq/27-eth0-tx-0-21swapper/210:51:042
29725050,0irq/27-eth0-tx-0-21swapper/210:26:412
29725050,0irq/27-eth0-tx-0-21swapper/209:21:482
29725050,0irq/27-eth0-tx-0-21swapper/008:05:240
29725050,0irq/27-eth0-tx-0-21swapper/008:00:370
29715050,0irq/26-eth0-rx-4466-21ssh10:10:373
29715050,0irq/26-eth0-rx-31966-21grep10:50:293
29715050,0irq/26-eth0-rx-30235-21ssh10:30:123
29715050,0irq/26-eth0-rx-27369-21ssh12:07:543
29715050,0irq/26-eth0-rx-21570-21ssh11:05:203
29715050,0irq/26-eth0-rx-1689-21proc_pri12:10:303
29715050,0irq/26-eth0-rx-16877-21kthreadcore09:20:273
29715050,0irq/26-eth0-rx-16590-21kthreadcore11:20:263
29715050,0irq/26-eth0-rx-12731-21fschecks_time12:20:263
29715050,0irq/26-eth0-rx-10004-21needreboot11:55:303
29715050,0irq/26-eth0-rx-0-21swapper/312:00:213
29715050,0irq/26-eth0-rx-0-21swapper/311:52:203
29715050,0irq/26-eth0-rx-0-21swapper/311:26:103
29715050,0irq/26-eth0-rx-0-21swapper/310:08:413
29715050,0irq/26-eth0-rx-0-21swapper/309:03:253
29715050,0irq/26-eth0-rx-0-21swapper/308:53:183
259950,0migration/25008-21idleruntime-cro08:30:112
259950,0migration/226547-21kthreadcore09:25:282
249950,0watchdog/24779-21ssh10:32:452
19150,0ktimersoftd/10-21swapper/109:15:211
179950,0migration/19165-21kthreadcore09:35:271
179950,0migration/19158-21kthreadcore11:35:271
179950,0migration/128798-21sh10:26:361
179950,0migration/126071-21kthreadcore09:45:281
179950,0migration/124017-21kthreadcore11:05:271
179950,0migration/116206-21kthreadcore11:00:291
169950,0watchdog/113830-21ssh10:19:331
149950,0migration/09304-21cpuspeed_turbos07:20:230
149950,0migration/09129-21kthreadcore08:30:280
149950,0migration/07827-21kthreadcore10:55:270
149950,0migration/07068-21idleruntime08:55:250
149950,0migration/06693-21sh09:55:190
149950,0migration/04428-21timerwakeupswit08:25:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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