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2026-09-22 - 11:26

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 Sep 22, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450970,0irq/25-eth10-21swapper/318:42:173
2486523624,0sleep20-21swapper/218:40:552
2466523430,0sleep00-21swapper/018:38:370
2466822824,0sleep10-21swapper/118:38:381
251329976,0cyclictest0-21swapper/123:13:281
339960,0migration/332178-21fschecks_time20:48:263
339960,0migration/327616-21sh22:44:113
339960,0migration/323393-21idleruntime-cro20:43:133
339960,0migration/320163-21missed_timers21:38:313
339960,0migration/316792-21munin-node20:58:283
339960,0migration/310902-21sh23:14:563
29715060,0irq/26-eth0-rx-20787-21fschecks_time23:23:283
251319960,0cyclictest0-21swapper/021:59:220
251319960,0cyclictest0-21swapper/021:12:140
169960,0watchdog/113076-21cut23:18:271
339950,0migration/3898-21munin-node19:33:403
339950,0migration/38737-21kthreadcore21:53:283
339950,0migration/37250-21kthreadcore22:53:303
339950,0migration/36879-21fschecks_count18:53:263
339950,0migration/35715-21kthreadcore20:28:303
339950,0migration/34804-21runrttasks21:49:443
339950,0migration/34556-21munin-node23:33:283
339950,0migration/33652-21kthreadcore18:48:313
339950,0migration/332557-21kthreadcore23:28:293
339950,0migration/330419-21taskset21:26:453
339950,0migration/329326-21kthreadcore19:08:313
339950,0migration/327679-21kthreadcore20:18:313
339950,0migration/326632-21munin-node19:28:353
339950,0migration/323555-21kthreadcore23:03:303
339950,0migration/314997-21aten_r1power_en19:48:253
339950,0migration/313330-21runrttasks22:38:173
339950,0migration/310526-21kthreadcore21:13:303
29725050,0irq/27-eth0-tx-3755-21munin-node23:33:362
29725050,0irq/27-eth0-tx-2177-21kthreadcore20:48:302
29725050,0irq/27-eth0-tx-1492-21ssh00:10:252
29725050,0irq/27-eth0-tx-12830-21munin-node22:58:332
29725050,0irq/27-eth0-tx-0-21swapper/222:24:452
29725050,0irq/27-eth0-tx-0-21swapper/222:04:342
29725050,0irq/27-eth0-tx-0-21swapper/221:48:212
29725050,0irq/27-eth0-tx-0-21swapper/221:25:372
29715050,0irq/26-eth0-rx-9982-21grep19:18:303
29715050,0irq/26-eth0-rx-6685-21irqstats22:33:273
29715050,0irq/26-eth0-rx-6559-21runrttasks00:03:493
29715050,0irq/26-eth0-rx-32133-21df_abs21:08:243
29715050,0irq/26-eth0-rx-27958-21ps19:57:253
29715050,0irq/26-eth0-rx-19688-21cut19:03:263
29715050,0irq/26-eth0-rx-15329-21munin-node21:18:343
29715050,0irq/26-eth0-rx-14792-21fschecks_count21:58:263
29715050,0irq/26-eth0-rx-12162chrt00:09:343
29715050,0irq/26-eth0-rx-0-21swapper/323:58:273
29715050,0irq/26-eth0-rx-0-21swapper/323:38:403
29715050,0irq/26-eth0-rx-0-21swapper/323:08:253
29715050,0irq/26-eth0-rx-0-21swapper/322:59:123
29715050,0irq/26-eth0-rx-0-21swapper/322:21:273
29715050,0irq/26-eth0-rx-0-21swapper/322:08:163
29715050,0irq/26-eth0-rx-0-21swapper/322:06:553
29715050,0irq/26-eth0-rx-0-21swapper/321:44:113
29715050,0irq/26-eth0-rx-0-21swapper/321:34:423
29715050,0irq/26-eth0-rx-0-21swapper/320:55:403
29715050,0irq/26-eth0-rx-0-21swapper/320:47:223
251339955,0cyclictest0-21swapper/222:33:372
251339950,0cyclictest0-21swapper/222:21:572
251339950,0cyclictest0-21swapper/222:08:522
251329954,0cyclictest3556-21lldpd18:54:101
251319955,0cyclictest0-21swapper/022:05:310
251319955,0cyclictest0-21swapper/020:48:440
251319950,0cyclictest0-21swapper/023:54:270
251319950,0cyclictest0-21swapper/021:55:440
259950,0migration/25263-21kthreadcore23:53:302
259950,0migration/229316-21kthreadcore19:33:332
259950,0migration/228427-21sh22:46:372
259950,0migration/228346-21fschecks_time23:48:272
259950,0migration/223148-21fschecks_count21:43:272
259950,0migration/220982-21sh21:38:532
259950,0migration/214837-21sh20:57:092
249950,0watchdog/213208-21kthreadcore20:33:312
249950,0watchdog/213075-21sed23:18:272
179950,0migration/132022-21idleruntime21:28:281
179950,0migration/131381-21kthreadcore00:08:301
179950,0migration/129316-21munin-node21:03:391
179950,0migration/125907-21munin-node23:43:391
179950,0migration/122633-21sh21:01:201
179950,0migration/11855-21kthreadcore22:28:321
179950,0migration/115957-21munin-node20:33:361
8215040,0irq/24-0000:00:12015-21ssh22:13:382
339940,0migration/38434-21timerandwakeup20:03:373
339940,0migration/328392-21aten_r1power_po19:58:253
339940,0migration/318648-21diskmemload23:19:193
29725040,0irq/27-eth0-tx-6809-21munin-node21:33:272
29725040,0irq/27-eth0-tx-28182-21munin-node23:28:252
29725040,0irq/27-eth0-tx-13379-21munin-node22:38:282
29725040,0irq/27-eth0-tx-0-21swapper/223:24:262
29725040,0irq/27-eth0-tx-0-21swapper/223:13:172
29725040,0irq/27-eth0-tx-0-21swapper/223:08:222
29725040,0irq/27-eth0-tx-0-21swapper/222:53:202
29725040,0irq/27-eth0-tx-0-21swapper/221:58:382
29725040,0irq/27-eth0-tx-0-21swapper/221:18:252
29725040,0irq/27-eth0-tx-0-21swapper/221:13:162
29725040,0irq/27-eth0-tx-0-21swapper/221:03:182
29725040,0irq/27-eth0-tx-0-21swapper/220:58:222
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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