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2026-08-29 - 03:38

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 Sat Aug 29, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450970,0irq/25-eth10-21swapper/318:42:153
975026766,0sleep20-21swapper/218:44:232
953324948,0sleep00-21swapper/018:41:530
976923425,0sleep10-21swapper/118:44:381
99159980,0cyclictest23690-21latency_hist19:20:300
99159970,0cyclictest0-21swapper/022:45:470
99179960,0cyclictest6630-21diskmemload22:59:242
99169966,0cyclictest6630-21diskmemload23:53:411
99169960,0cyclictest6630-21diskmemload23:36:301
99169960,0cyclictest0-21swapper/123:20:541
339960,0migration/34805-21latency_hist22:05:303
339960,0migration/312220-21sh21:47:283
29715060,0irq/26-eth0-rx-6985-21diskstats21:05:433
29715060,0irq/26-eth0-rx-31369-21load00:00:493
29715060,0irq/26-eth0-rx-28401-21kthreadcore19:45:473
29715060,0irq/26-eth0-rx-26536-21munin-node22:15:503
29715060,0irq/26-eth0-rx-0-21swapper/323:40:473
29715060,0irq/26-eth0-rx-0-21swapper/323:12:433
149960,0migration/09817-21sh23:50:240
149960,0migration/08734-21kthreadcore19:55:470
149960,0migration/026130-21sh22:56:320
149960,0migration/021135-21sh21:55:230
149960,0migration/019824-21sh22:35:060
149960,0migration/013148-21taskset21:50:170
99179955,0cyclictest0-21swapper/200:06:052
99179950,0cyclictest0-21swapper/223:28:052
99179950,0cyclictest0-21swapper/223:07:452
99179950,0cyclictest0-21swapper/222:39:032
99179950,0cyclictest0-21swapper/222:12:532
99179950,0cyclictest0-21swapper/220:54:132
99169955,0cyclictest0-21swapper/123:03:051
99169955,0cyclictest0-21swapper/121:44:441
99169955,0cyclictest0-21swapper/120:53:101
99169954,0cyclictest3241-21irqbalance23:25:481
99169950,0cyclictest0-21swapper/122:26:021
99159955,0cyclictest0-21swapper/022:15:490
99159954,0cyclictest12046-21sh22:30:300
99159950,0cyclictest0-21swapper/023:56:430
99159950,0cyclictest0-21swapper/021:29:380
8215050,0irq/24-0000:00:3570-21perf19:05:302
4150,0ktimersoftd/00-21swapper/023:07:220
4150,0ktimersoftd/00-21swapper/020:50:320
339950,0migration/33770-21taskset22:45:313
339950,0migration/332024-21kthreadcore22:20:493
339950,0migration/331072-21kthreadcore22:00:473
339950,0migration/331072-21kthreadcore22:00:473
339950,0migration/329613-21timerandwakeup19:20:523
339950,0migration/327937-21munin-node23:00:423
339950,0migration/326575-21taskset22:36:243
339950,0migration/325782-21aten_r1power_cu20:10:403
339950,0migration/32211-21kthreadcore21:40:483
339950,0migration/320814-21irqcore22:55:463
339950,0migration/319815-21fschecks_time20:30:443
339950,0migration/318338-21kthreadcore21:10:483
339950,0migration/318149-21munin-node19:15:453
339950,0migration/316753-21kthreadcore20:00:483
339950,0migration/315081-21fschecks_count20:50:423
339950,0migration/312931-21munin-node22:10:403
339950,0migration/311295-21open_files19:55:503
339950,0migration/310901-21taskset19:31:363
29725050,0irq/27-eth0-tx-5918-21munin-node20:20:510
29725050,0irq/27-eth0-tx-5489-21munin-node21:45:482
29725050,0irq/27-eth0-tx-31360-21kthreadcore22:40:482
29725050,0irq/27-eth0-tx-10494-21munin-node19:10:440
29725050,0irq/27-eth0-tx-0-21swapper/223:43:502
29725050,0irq/27-eth0-tx-0-21swapper/223:35:212
29725050,0irq/27-eth0-tx-0-21swapper/223:22:582
29725050,0irq/27-eth0-tx-0-21swapper/222:09:072
29725050,0irq/27-eth0-tx-0-21swapper/020:35:400
29725050,0irq/27-eth0-tx-0-21swapper/019:30:430
29715050,0irq/26-eth0-rx-5261-21munin-node22:25:473
29715050,0irq/26-eth0-rx-4038-21cut19:50:473
29715050,0irq/26-eth0-rx-26720-21kthreadcore20:55:453
29715050,0irq/26-eth0-rx-24980-40yum-updatesd-he23:36:373
29715050,0irq/26-eth0-rx-23218-21cut21:55:463
29715050,0irq/26-eth0-rx-18443-21df_abs23:55:413
29715050,0irq/26-eth0-rx-14076-21aten_r1power_fr21:30:413
29715050,0irq/26-eth0-rx-13477-21taskset21:29:483
29715050,0irq/26-eth0-rx-12915-21fschecks_time22:30:433
29715050,0irq/26-eth0-rx-12111-21perl19:35:433
29715050,0irq/26-eth0-rx-0-21swapper/323:31:333
29715050,0irq/26-eth0-rx-0-21swapper/323:27:263
29715050,0irq/26-eth0-rx-0-21swapper/323:05:453
29715050,0irq/26-eth0-rx-0-21swapper/322:53:443
29715050,0irq/26-eth0-rx-0-21swapper/322:43:543
29715050,0irq/26-eth0-rx-0-21swapper/321:36:233
29715050,0irq/26-eth0-rx-0-21swapper/320:45:513
29715050,0irq/26-eth0-rx-0-21swapper/318:45:463
29715050,0irq/26-eth0-rx-0-21swapper/300:10:463
29715050,0irq/26-eth0-rx-0-21swapper/300:05:463
259950,0migration/24397-21aten_r1power_en22:25:432
259950,0migration/23699-21latency_hist19:05:302
259950,0migration/23264-21sh22:01:202
259950,0migration/23264-21sh22:01:202
259950,0migration/229254-21sh20:56:582
259950,0migration/224873-21proc_pri23:15:502
259950,0migration/224295-21kthreadcore18:55:472
259950,0migration/222647-21kthreadcore22:15:452
249950,0watchdog/227886-21timerwakeupswit21:35:522
249950,0watchdog/221531-21needreboot18:50:492
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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