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2025-11-18 - 20:23

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 Nov 18, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291350980,0irq/25-eth10-21swapper/306:35:543
519724735,0sleep00-21swapper/006:38:550
506624536,0sleep10-21swapper/106:37:241
508023425,0sleep20-21swapper/206:37:332
53389976,0cyclictest12601-21cpuspeed_turbos06:45:010
339960,0migration/37832-21sh10:05:463
339960,0migration/32829-21aten_r1power_po09:44:583
339960,0migration/325411-21missed_timers11:40:043
339960,0migration/313105-21sh10:51:173
28415060,0irq/27-eth0-tx-20850-21munin-node07:40:010
28415060,0irq/27-eth0-tx-19833-21munin-node07:14:590
28415060,0irq/27-eth0-tx-0-21swapper/212:04:272
28415060,0irq/27-eth0-tx-0-21swapper/211:46:292
28415060,0irq/27-eth0-tx-0-21swapper/211:35:202
28415060,0irq/27-eth0-tx-0-21swapper/211:34:382
28415060,0irq/27-eth0-tx-0-21swapper/210:52:532
28415060,0irq/27-eth0-tx-0-21swapper/210:34:442
28415060,0irq/27-eth0-tx-0-21swapper/209:45:432
28415060,0irq/27-eth0-tx-0-21swapper/209:06:122
28415060,0irq/27-eth0-tx-0-21swapper/209:02:042
28415060,0irq/27-eth0-tx-0-21swapper/008:20:070
28405060,0irq/26-eth0-rx-21619-21diskstats11:20:043
28405060,0irq/26-eth0-rx-16644-21wc09:05:113
259960,0migration/231609-21kthreadcore12:05:062
149960,0migration/03872-21sh11:28:540
149960,0migration/023876-21sh10:17:280
149960,0migration/013359-21sh10:52:080
149960,0migration/01295-21sh09:40:360
8225050,0irq/24-0000:00:18696-21munin-run06:49:452
8225050,0irq/24-0000:00:16104-21perf08:24:452
53419955,0cyclictest0-21swapper/208:42:402
53419954,0cyclictest6445-21snmpd07:05:462
53419950,0cyclictest0-21swapper/211:04:152
53419950,0cyclictest0-21swapper/210:15:412
53409953,0cyclictest7648-21kworker/1:109:00:581
53409950,0cyclictest0-21swapper/110:42:281
53389955,0cyclictest0-21swapper/012:05:130
53389955,0cyclictest0-21swapper/011:55:450
53389955,0cyclictest0-21swapper/011:42:020
53389955,0cyclictest0-21swapper/007:30:060
53389950,0cyclictest0-21swapper/011:51:110
53389950,0cyclictest0-21swapper/010:00:020
53389950,0cyclictest0-21swapper/009:27:240
35150,0ktimersoftd/30-21swapper/311:28:193
339950,0migration/3820-21kthreadcore11:05:033
339950,0migration/36840-21runrttasks10:26:423
339950,0migration/35177-21missed_timers07:00:033
339950,0migration/34882-21kthreadcore08:15:033
339950,0migration/34297-21missed_timers10:45:043
339950,0migration/33542-21latency_hist11:49:443
339950,0migration/332575-21taskset07:20:503
339950,0migration/32277-21kthreadcore07:25:053
339950,0migration/322377-21kthreadcore09:55:033
339950,0migration/317067-21kthreadcore09:30:043
339950,0migration/316287-21kthreadcore11:15:053
339950,0migration/314661-21taskset07:57:013
339950,0migration/314356-21aten_r1power_vo07:35:013
339950,0migration/313406-21kthreadcore09:50:023
339950,0migration/312044-21taskset06:44:443
339950,0migration/311931-21aten_r1power_cu08:44:573
339950,0migration/31112-21munin-node12:05:093
28415050,0irq/27-eth0-tx-31730-21ssh10:22:562
28415050,0irq/27-eth0-tx-18914-21ssh11:57:512
28415050,0irq/27-eth0-tx-13183-21irqrtprio08:45:032
28415050,0irq/27-eth0-tx-0-21swapper/211:51:112
28415050,0irq/27-eth0-tx-0-21swapper/211:25:482
28415050,0irq/27-eth0-tx-0-21swapper/211:22:552
28415050,0irq/27-eth0-tx-0-21swapper/211:16:342
28415050,0irq/27-eth0-tx-0-21swapper/211:09:512
28415050,0irq/27-eth0-tx-0-21swapper/211:05:082
28415050,0irq/27-eth0-tx-0-21swapper/210:58:012
28415050,0irq/27-eth0-tx-0-21swapper/210:45:182
28415050,0irq/27-eth0-tx-0-21swapper/210:36:142
28415050,0irq/27-eth0-tx-0-21swapper/210:28:412
28415050,0irq/27-eth0-tx-0-21swapper/210:05:492
28415050,0irq/27-eth0-tx-0-21swapper/209:51:502
28415050,0irq/27-eth0-tx-0-21swapper/209:36:012
28415050,0irq/27-eth0-tx-0-21swapper/209:30:422
28415050,0irq/27-eth0-tx-0-21swapper/209:27:112
28415050,0irq/27-eth0-tx-0-21swapper/209:20:592
28415050,0irq/27-eth0-tx-0-21swapper/209:10:412
28415050,0irq/27-eth0-tx-0-21swapper/208:55:432
28415050,0irq/27-eth0-tx-0-21swapper/208:50:232
28415050,0irq/27-eth0-tx-0-21swapper/008:30:010
28415050,0irq/27-eth0-tx-0-21swapper/006:59:560
28415050,0irq/27-eth0-tx-0-21swapper/006:50:050
28405050,0irq/26-eth0-rx-701-21rt-features08:55:073
28405050,0irq/26-eth0-rx-3380-21df_abs09:00:033
28405050,0irq/26-eth0-rx-27158-21turbostat09:39:443
28405050,0irq/26-eth0-rx-26638-21timerwakeupswit07:40:093
28405050,0irq/26-eth0-rx-25984-21kthreadcore10:40:023
28405050,0irq/26-eth0-rx-24008-21iostat_ios08:30:023
28405050,0irq/26-eth0-rx-19288-21grep10:35:063
28405050,0irq/26-eth0-rx-18192-21kthreadcore08:25:043
28405050,0irq/26-eth0-rx-16157-21kthreadcore11:55:033
28405050,0irq/26-eth0-rx-0-21swapper/312:00:413
28405050,0irq/26-eth0-rx-0-21swapper/311:50:023
28405050,0irq/26-eth0-rx-0-21swapper/311:36:573
28405050,0irq/26-eth0-rx-0-21swapper/311:13:533
28405050,0irq/26-eth0-rx-0-21swapper/310:14:593
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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