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2026-01-10 - 12:01

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 Jan 10, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450670,0irq/25-eth10-21swapper/319:04:153
1912223725,0sleep00-21swapper/019:06:240
1903822818,0sleep20-21swapper/219:05:262
1904722723,0sleep10-21swapper/119:05:331
192799976,0cyclictest28162-21cut22:32:401
339960,0migration/38869-21sh22:00:493
339960,0migration/332195-21sh23:56:123
339960,0migration/32990-21kthreadcore22:37:383
339960,0migration/324095-21sh00:31:493
339960,0migration/318502-21munin-node22:27:373
339960,0migration/317460-21taskset21:06:323
339960,0migration/317083-21sh21:45:543
339960,0migration/31197-21sh21:57:173
29715060,0irq/26-eth0-rx-665-21grep00:17:343
29715060,0irq/26-eth0-rx-17913-21perl22:47:363
29715060,0irq/26-eth0-rx-15472-21python22:02:443
27160,0ktimersoftd/20-21swapper/221:35:352
149960,0migration/06371-21munin-node19:17:440
149960,0migration/0362-21sh21:55:020
149960,0migration/015541-21sh00:25:210
149960,0migration/010246-21aten_r1power_po20:37:320
339950,0migration/33094-21missed_timers20:52:413
339950,0migration/328501-21kthreadcore21:12:393
339950,0migration/328371-21aten_r1power_vo20:02:343
339950,0migration/323350-21munin-node20:22:373
339950,0migration/321450-21latency_hist19:57:243
339950,0migration/321289-21kthreadcore23:27:403
339950,0migration/321226-21kthreadcore20:42:413
339950,0migration/320416-21diskmemload22:07:383
339950,0migration/319951-21kthreadcore23:47:383
339950,0migration/319648-21kthreadcore21:47:383
339950,0migration/317873-21munin-node23:07:363
339950,0migration/317175-21runrttasks22:27:133
339950,0migration/315193-21sh23:02:523
339950,0migration/31491-21irqcore19:17:373
339950,0migration/314180-21munin-node23:42:403
339950,0migration/311540-21kthreadcore00:22:383
339950,0migration/310703-21kthreadcore22:42:393
29725050,0irq/27-eth0-tx-9318-21expr23:02:342
29725050,0irq/27-eth0-tx-7747-21ssh22:18:032
29725050,0irq/27-eth0-tx-6559-21runrttasks21:11:462
29725050,0irq/27-eth0-tx-27210-21munin-node19:37:432
29725050,0irq/27-eth0-tx-25055-21grep00:32:342
29725050,0irq/27-eth0-tx-21536-21munin-node19:57:422
29725050,0irq/27-eth0-tx-16804-21munin-node23:47:342
29725050,0irq/27-eth0-tx-0-21swapper/223:45:252
29725050,0irq/27-eth0-tx-0-21swapper/222:27:472
29725050,0irq/27-eth0-tx-0-21swapper/222:25:442
29725050,0irq/27-eth0-tx-0-21swapper/221:50:022
29725050,0irq/27-eth0-tx-0-21swapper/221:17:352
29725050,0irq/27-eth0-tx-0-21swapper/200:21:182
29725050,0irq/27-eth0-tx-0-21swapper/200:11:492
29715050,0irq/26-eth0-rx-6832-21sort22:17:393
29715050,0irq/26-eth0-rx-6559-21runrttasks21:07:313
29715050,0irq/26-eth0-rx-31934-21ssh22:12:493
29715050,0irq/26-eth0-rx-30735-21sh00:32:543
29715050,0irq/26-eth0-rx-20296-21kthreadcore00:07:383
29715050,0irq/26-eth0-rx-15010-21irqcore19:27:393
29715050,0irq/26-eth0-rx-1093-21tune2fs23:37:353
29715050,0irq/26-eth0-rx-0-21swapper/323:32:373
29715050,0irq/26-eth0-rx-0-21swapper/323:22:453
29715050,0irq/26-eth0-rx-0-21swapper/323:17:353
29715050,0irq/26-eth0-rx-0-21swapper/323:12:483
29715050,0irq/26-eth0-rx-0-21swapper/322:59:413
29715050,0irq/26-eth0-rx-0-21swapper/322:52:403
29715050,0irq/26-eth0-rx-0-21swapper/321:24:293
29715050,0irq/26-eth0-rx-0-21swapper/319:12:173
29715050,0irq/26-eth0-rx-0-21swapper/300:15:433
259950,0migration/27989-21dump-pmu-power19:47:232
259950,0migration/231921-21timerandwakeup19:12:452
259950,0migration/230855-21timerandwakeup23:32:432
259950,0migration/230669-21munin-node23:12:422
259950,0migration/229112-21sendmail_mailqu20:47:432
259950,0migration/223768-21kthreadcore19:32:392
259950,0migration/220406-21latency_hist19:32:242
259950,0migration/215290-21sh23:23:272
259950,0migration/210426-21gltestperf22:02:352
249950,0watchdog/28768-21awk00:22:332
192809955,0cyclictest0-21swapper/221:31:592
192809955,0cyclictest0-21swapper/221:24:252
192809950,0cyclictest0-21swapper/222:38:032
192809950,0cyclictest0-21swapper/222:01:192
192809950,0cyclictest0-21swapper/200:28:062
192809950,0cyclictest0-21swapper/200:13:172
192799955,0cyclictest0-21swapper/121:12:441
192799954,0cyclictest26694-21awk22:12:371
192799950,0cyclictest0-21swapper/123:54:291
192799950,0cyclictest0-21swapper/122:21:191
192799950,0cyclictest0-21swapper/100:26:481
192799950,0cyclictest0-21swapper/100:09:561
149950,0migration/09307-21aten_r1power_fr22:42:340
149950,0migration/08907-21gltestperf19:47:370
149950,0migration/07065-21kthreadcore20:57:400
149950,0migration/05609-21kthreadcore23:37:390
149950,0migration/032369-21kthreadcore19:37:390
149950,0migration/032315-21kthreadcore20:52:390
149950,0migration/03075-21kthreadcore19:42:390
149950,0migration/030338-21kthreadcore22:52:410
149950,0migration/028238-21aten_r1power_cu20:02:340
149950,0migration/02729-21cpuspeed_turbos20:07:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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