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2026-08-17 - 01:39

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 Mon Aug 17, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450640,0irq/25-eth10-21swapper/318:43:563
3149924332,0sleep00-21swapper/018:43:160
3149623425,0sleep20-21swapper/218:43:142
3161122723,0sleep10-21swapper/118:44:371
339960,0migration/38657-21sh23:12:343
339960,0migration/319275-21sh21:58:383
339960,0migration/317889-21sh22:59:493
339960,0migration/315982-21munin-node20:11:503
339960,0migration/31541-21munin-node22:27:023
318599960,0cyclictest30031-21diskmemload21:24:222
318589965,0cyclictest18651-21cut23:41:561
29715060,0irq/26-eth0-rx-8988-21date23:56:383
29715060,0irq/26-eth0-rx-8438-21nfs_client22:52:003
29715060,0irq/26-eth0-rx-14285-21iostat_ios21:36:553
149960,0migration/029375-21sh21:05:330
149960,0migration/021640-21fschecks_count21:41:520
149960,0migration/019168-21latency_hist22:41:380
149960,0migration/017755-21sh23:21:100
149960,0migration/017607-21fschecks_time00:01:520
149960,0migration/011788-21timerandwakeup21:12:020
8215050,0irq/24-0000:00:28046-21idleruntime-cro19:56:392
339950,0migration/39559-21needreboot22:11:573
339950,0migration/39197-21sendmail_mailqu22:32:023
339950,0migration/39054-21sh23:35:453
339950,0migration/37802-21taskset23:53:413
339950,0migration/36054-21kthreadcore20:01:573
339950,0migration/35700-21munin-node21:51:543
339950,0migration/35131-21kthreadcore19:36:593
339950,0migration/33030-21taskset20:23:543
339950,0migration/33006-21kthreadcore20:46:583
339950,0migration/328342-21munin-node19:31:563
339950,0migration/327989-21kthreadcore19:06:553
339950,0migration/327428-21taskset22:26:113
339950,0migration/326141-21aten_r1power_en23:26:513
339950,0migration/325771-21taskset23:04:313
339950,0migration/325295-21cpuspeed_turbos00:06:523
339950,0migration/325169-21munin-node19:02:003
339950,0migration/324170-21kthreadcore21:41:573
339950,0migration/322769-21kthreadcore23:41:573
339950,0migration/321918-21cpuspeed_turbos19:51:513
339950,0migration/32174-21taskset20:00:203
339950,0migration/317602-21munin-node20:36:543
339950,0migration/316686-21idleruntime-cro20:36:393
339950,0migration/316686-21idleruntime-cro20:36:393
339950,0migration/313917-21aten_r1power_po21:16:493
339950,0migration/313824-21latency_hist20:56:393
339950,0migration/313308-21munin-node19:17:033
318599955,0cyclictest0-21swapper/221:27:502
318599955,0cyclictest0-21swapper/200:02:112
318599950,0cyclictest0-21swapper/223:42:282
318589954,0cyclictest15833-21awk19:46:541
318579955,0cyclictest0-21swapper/000:07:350
318579950,0cyclictest0-21swapper/021:30:430
318579950,0cyclictest0-21swapper/021:09:540
29725050,0irq/27-eth0-tx-8346-21telnet19:41:500
29725050,0irq/27-eth0-tx-76492sleep200:14:522
29725050,0irq/27-eth0-tx-32068-21munin-node18:47:000
29725050,0irq/27-eth0-tx-29259-21ssh21:46:502
29725050,0irq/27-eth0-tx-26925-21idleruntime23:26:542
29725050,0irq/27-eth0-tx-23595-21munin-node20:42:000
29725050,0irq/27-eth0-tx-19933-21munin-node22:21:552
29725050,0irq/27-eth0-tx-0-21swapper/223:56:532
29725050,0irq/27-eth0-tx-0-21swapper/223:15:312
29725050,0irq/27-eth0-tx-0-21swapper/223:05:512
29725050,0irq/27-eth0-tx-0-21swapper/222:37:102
29725050,0irq/27-eth0-tx-0-21swapper/222:17:552
29725050,0irq/27-eth0-tx-0-21swapper/222:11:392
29725050,0irq/27-eth0-tx-0-21swapper/221:45:532
29725050,0irq/27-eth0-tx-0-21swapper/221:12:372
29725050,0irq/27-eth0-tx-0-21swapper/221:07:362
29725050,0irq/27-eth0-tx-0-21swapper/020:46:450
29725050,0irq/27-eth0-tx-0-21swapper/019:05:510
29725050,0irq/27-eth0-tx-0-21swapper/018:56:130
29715050,0irq/26-eth0-rx-31008-21munin-node21:06:563
29715050,0irq/26-eth0-rx-22596-21munin-node20:16:503
29715050,0irq/26-eth0-rx-1266-21sh00:11:533
29715050,0irq/26-eth0-rx-0-21swapper/323:50:383
29715050,0irq/26-eth0-rx-0-21swapper/323:40:183
29715050,0irq/26-eth0-rx-0-21swapper/322:38:323
29715050,0irq/26-eth0-rx-0-21swapper/321:50:023
29715050,0irq/26-eth0-rx-0-21swapper/321:29:313
29715050,0irq/26-eth0-rx-0-21swapper/321:21:543
29715050,0irq/26-eth0-rx-0-21swapper/321:15:233
29715050,0irq/26-eth0-rx-0-21swapper/300:03:413
259950,0migration/29463-21sh22:53:202
259950,0migration/25509-21kthreadcore20:01:572
259950,0migration/23430-21sh22:10:402
259950,0migration/231739-21sh00:09:002
259950,0migration/228193-21munin-node19:31:552
259950,0migration/22695-21timerwakeupswit20:22:022
259950,0migration/226843-21runrttasks22:02:362
259950,0migration/226809-21runrttasks22:46:042
259950,0migration/220037-21kthreadcore23:21:532
259950,0migration/215030-21irqrtprio21:16:542
259950,0migration/21361-21timerwakeupswit22:27:012
259950,0migration/211924-21kthreadcore23:16:542
249950,0watchdog/230268-21kthreadcore23:46:562
249950,0watchdog/20-21swapper/221:56:572
19150,0ktimersoftd/10-21swapper/123:02:541
179950,0migration/19198-21latency_hist20:06:391
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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