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2026-03-11 - 12:36

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 Wed Mar 11, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
449724637,0sleep10-21swapper/118:59:011
447723727,0sleep30-21swapper/318:58:473
3073923430,0sleep00-21swapper/018:56:560
469123127,0sleep20-21swapper/219:01:182
480699110,0cyclictest0-21swapper/221:03:042
48059970,0cyclictest0-21swapper/122:02:001
48059960,0cyclictest0-21swapper/123:58:301
48049960,0cyclictest9908-21ssh21:43:280
48049960,0cyclictest0-21swapper/021:56:240
48049960,0cyclictest0-21swapper/000:21:550
4160,0ktimersoftd/00-21swapper/021:38:440
339960,0migration/39092-21sh23:05:193
339960,0migration/32962-21munin-node22:42:003
339960,0migration/327602-21munin-node22:16:563
339960,0migration/325628-21sh22:13:483
339960,0migration/318297-21sh21:09:063
339960,0migration/317999-21sh21:48:493
339960,0migration/31609-21sh21:17:323
339960,0migration/315591-21sh00:30:233
339960,0migration/315257-21sh23:47:143
339960,0migration/31040-21sh23:21:383
29725060,0irq/27-eth0-tx-0-21swapper/019:45:590
29715060,0irq/26-eth0-rx-3856-21kthreadcore22:21:593
29715060,0irq/26-eth0-rx-31629-21ssh23:37:213
29715060,0irq/26-eth0-rx-14476-21tr22:47:033
29715060,0irq/26-eth0-rx-13763-21kthreadcore22:07:023
29715060,0irq/26-eth0-rx-0-21swapper/321:24:193
149960,0migration/020125-21gltestperf19:36:570
149960,0migration/014695-21sh00:27:450
149960,0migration/01128-21sh23:00:470
48059955,0cyclictest3024-21diskmemload22:51:111
48059955,0cyclictest0-21swapper/100:03:331
48059950,0cyclictest0-21swapper/122:58:361
48049955,0cyclictest3024-21diskmemload23:35:430
48049955,0cyclictest0-21swapper/022:11:130
48049955,0cyclictest0-21swapper/000:06:470
48049950,0cyclictest0-21swapper/022:40:040
48049950,0cyclictest0-21swapper/022:18:380
48049950,0cyclictest0-21swapper/000:01:440
4150,0ktimersoftd/00-21swapper/022:02:140
4150,0ktimersoftd/00-21swapper/021:21:050
339950,0migration/39968-21irqrtprio00:07:003
339950,0migration/39599-21munin-node23:26:563
339950,0migration/329359-21kthreadcore20:07:023
339950,0migration/325066-21munin-node19:37:063
339950,0migration/324812-21kthreadcore20:27:023
339950,0migration/323379-21kthreadcore20:02:013
339950,0migration/319644-21munin-node21:31:553
339950,0migration/317489-21munin-node00:11:583
339950,0migration/310663-21kthreadcore20:16:593
29725050,0irq/27-eth0-tx-9466-21munin-node23:27:002
29725050,0irq/27-eth0-tx-25012-21ssh23:15:182
29725050,0irq/27-eth0-tx-24659-21munin-node00:16:572
29725050,0irq/27-eth0-tx-19632-21munin-node21:32:022
29725050,0irq/27-eth0-tx-19145-21ssh21:31:072
29725050,0irq/27-eth0-tx-12026-21gltestperf21:46:572
29725050,0irq/27-eth0-tx-0-21swapper/223:58:052
29725050,0irq/27-eth0-tx-0-21swapper/223:55:522
29725050,0irq/27-eth0-tx-0-21swapper/223:48:032
29725050,0irq/27-eth0-tx-0-21swapper/223:44:062
29725050,0irq/27-eth0-tx-0-21swapper/223:08:052
29725050,0irq/27-eth0-tx-0-21swapper/222:48:232
29725050,0irq/27-eth0-tx-0-21swapper/222:09:182
29725050,0irq/27-eth0-tx-0-21swapper/222:01:542
29725050,0irq/27-eth0-tx-0-21swapper/221:23:122
29725050,0irq/27-eth0-tx-0-21swapper/221:13:252
29725050,0irq/27-eth0-tx-0-21swapper/020:56:180
29725050,0irq/27-eth0-tx-0-21swapper/020:36:590
29725050,0irq/27-eth0-tx-0-21swapper/020:32:040
29725050,0irq/27-eth0-tx-0-21swapper/019:36:030
29725050,0irq/27-eth0-tx-0-21swapper/019:07:180
29715050,0irq/26-eth0-rx-25313-21ssh23:16:123
29715050,0irq/26-eth0-rx-24083-21tr21:52:013
29715050,0irq/26-eth0-rx-19286-21kthreadcore23:32:003
29715050,0irq/26-eth0-rx-18847-21gltestperf22:51:563
29715050,0irq/26-eth0-rx-1377-21ssh21:58:183
29715050,0irq/26-eth0-rx-1088-21latency_hist23:21:433
29715050,0irq/26-eth0-rx-0-21swapper/323:56:563
29715050,0irq/26-eth0-rx-0-21swapper/323:55:223
29715050,0irq/26-eth0-rx-0-21swapper/323:46:203
29715050,0irq/26-eth0-rx-0-21swapper/322:37:053
29715050,0irq/26-eth0-rx-0-21swapper/322:32:003
29715050,0irq/26-eth0-rx-0-21swapper/322:03:113
29715050,0irq/26-eth0-rx-0-21swapper/321:41:563
29715050,0irq/26-eth0-rx-0-21swapper/321:12:313
29715050,0irq/26-eth0-rx-0-21swapper/320:22:023
29715050,0irq/26-eth0-rx-0-21swapper/319:51:583
29715050,0irq/26-eth0-rx-0-21swapper/300:23:343
259950,0migration/28776-21missed_timers21:42:032
259950,0migration/28277-21munin-node22:22:042
259950,0migration/27614-21taskset00:25:262
259950,0migration/26765-21unixbench_multi00:02:062
259950,0migration/232717-21irqcore19:21:592
259950,0migration/228131-21kthreadcore22:36:592
259950,0migration/214548-21switchtime00:07:072
249950,0watchdog/26610-21tune2fs19:26:592
249950,0watchdog/211924-21fschecks_count21:06:582
19150,0ktimersoftd/13024-21diskmemload21:38:441
19150,0ktimersoftd/10-21swapper/123:06:191
179950,0migration/18997-21ntp_offset21:22:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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