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2026-05-08 - 18:46

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 May 08, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450570,0irq/25-eth10-21swapper/306:54:283
1480824736,0sleep00-21swapper/006:55:510
1477023928,0sleep20-21swapper/206:55:292
1461722925,0sleep10-21swapper/106:53:391
149099999,0cyclictest28387-21sensors07:26:351
339960,0migration/35634-21munin-node09:31:243
339960,0migration/33745-21switchtime07:56:363
339960,0migration/33442-21sh11:09:543
339960,0migration/320102-21sh09:17:223
339960,0migration/319384-21sh10:58:503
29715060,0irq/26-eth0-rx-728-21kthreadcore09:46:303
29715060,0irq/26-eth0-rx-30937-21munin-node09:26:283
29715060,0irq/26-eth0-rx-28786-21ssh10:05:343
29715060,0irq/26-eth0-rx-27186-21chrt10:42:293
29715060,0irq/26-eth0-rx-24776-21kthreadcore09:41:293
29715060,0irq/26-eth0-rx-17640-21memory11:16:303
149109960,0cyclictest0-21swapper/209:44:212
149099965,0cyclictest0-21swapper/109:21:301
149099960,0cyclictest0-21swapper/111:34:151
149089960,0cyclictest13064-21diskmemload09:22:230
149960,0migration/05698-21fschecks_count09:51:260
149960,0migration/027762-21sh11:25:390
149960,0migration/027762-21sh11:25:390
149960,0migration/020206-21sh09:58:480
149960,0migration/019686-21gltestperf08:36:260
149960,0migration/019271-21sh10:16:480
149960,0migration/013162-21taskset09:15:380
149960,0migration/011972-21sh09:32:410
149960,0migration/011689-21sh10:33:570
8215050,0irq/24-0000:00:29250-21latency_hist09:46:132
4150,0ktimersoftd/00-21swapper/011:08:220
339950,0migration/35400-21aten_r1power_vo09:51:253
339950,0migration/33083-21munin-node07:11:263
339950,0migration/327550-21runrttasks10:22:403
339950,0migration/326963-21sh09:01:343
339950,0migration/326489-21kthreadcore08:16:293
339950,0migration/324229-21fschecks_count07:51:273
339950,0migration/324098-21taskset08:12:113
339950,0migration/32363-21munin-node10:26:333
339950,0migration/323195-21fschecks_count07:26:263
339950,0migration/322389-21taskset07:25:003
339950,0migration/318898-21kthreadcore07:46:313
339950,0migration/318813-21munin-node08:56:313
339950,0migration/316777-21taskset07:46:023
339950,0migration/315900-21kthreadcore10:16:313
339950,0migration/315387-21cpuspeed_turbos06:56:243
339950,0migration/312713-21if_eth1.211:56:253
339950,0migration/311443-21munin-node12:16:223
29725050,0irq/27-eth0-tx-9068-21kthreadcore11:11:292
29725050,0irq/27-eth0-tx-4946-21fschecks_count10:51:262
29725050,0irq/27-eth0-tx-3225-21ssh10:27:492
29725050,0irq/27-eth0-tx-29106-21kthreadcore12:06:282
29725050,0irq/27-eth0-tx-28968-21gltestperf11:26:262
29725050,0irq/27-eth0-tx-24901-21kthreadcore10:41:312
29725050,0irq/27-eth0-tx-20196-21diskstats12:01:252
29725050,0irq/27-eth0-tx-12481-21munin-node10:56:262
29725050,0irq/27-eth0-tx-0-21swapper/211:49:452
29725050,0irq/27-eth0-tx-0-21swapper/211:06:012
29725050,0irq/27-eth0-tx-0-21swapper/210:34:162
29725050,0irq/27-eth0-tx-0-21swapper/007:53:270
29725050,0irq/27-eth0-tx-0-21swapper/007:41:320
29715050,0irq/26-eth0-rx-4773-21aten_r1power_fr10:31:233
29715050,0irq/26-eth0-rx-3734-21aten_r1power_cu11:51:233
29715050,0irq/26-eth0-rx-3514-21snmpd11:47:153
29715050,0irq/26-eth0-rx-30982-21kthreadcore09:06:313
29715050,0irq/26-eth0-rx-19541-21ssh10:38:263
29715050,0irq/26-eth0-rx-0-21swapper/312:22:333
29715050,0irq/26-eth0-rx-0-21swapper/312:09:213
29715050,0irq/26-eth0-rx-0-21swapper/311:41:153
29715050,0irq/26-eth0-rx-0-21swapper/311:37:153
29715050,0irq/26-eth0-rx-0-21swapper/311:21:143
29715050,0irq/26-eth0-rx-0-21swapper/311:21:143
29715050,0irq/26-eth0-rx-0-21swapper/311:13:093
29715050,0irq/26-eth0-rx-0-21swapper/310:06:293
29715050,0irq/26-eth0-rx-0-21swapper/309:38:273
259950,0migration/24694-21runrttasks08:01:142
259950,0migration/226845-21runrttasks12:25:182
249950,0watchdog/226290-21ssh11:42:032
249950,0watchdog/21801-21kthreadcore09:06:322
19150,0ktimersoftd/10-21swapper/111:08:221
179950,0migration/19389-21timerwakeupswit12:11:341
179950,0migration/129333-21kthreadcore08:41:301
179950,0migration/126434-21kthreadcore07:51:301
179950,0migration/122741-21kthreadcore10:01:281
179950,0migration/12265-21taskset07:09:211
179950,0migration/119304-21pmu-power09:16:331
179950,0migration/115739-21munin-node07:41:311
179950,0migration/115046-21kthreadcore10:56:291
179950,0migration/113546-21cpuspeed_turbos09:56:241
149109955,0cyclictest12961-21fschecks_time11:16:252
149109955,0cyclictest0-21swapper/211:36:262
149109955,0cyclictest0-21swapper/210:02:472
149109955,0cyclictest0-21swapper/209:36:282
149109950,0cyclictest0-21swapper/210:06:342
149099954,0cyclictest32461-21sed10:06:291
149099950,0cyclictest0-21swapper/112:18:291
149099950,0cyclictest0-21swapper/112:01:501
149099950,0cyclictest0-21swapper/110:46:101
149099950,0cyclictest0-21swapper/109:32:041
149089955,0cyclictest0-21swapper/012:07:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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