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2025-04-05 - 22:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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 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.

Total number of samples: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of all highest latencies:
System rack9slot8s.osadl.org (updated Sat Apr 05, 2025 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2504421239198,0sleep09-21ksoftirqd/007:05:250
89528416,0sleep02117-21sendmail-mta11:29:520
2845028015,0sleep028456-21sh11:18:090
81850780,0irq/46-4a10000028801-21ssh09:55:360
81850780,0irq/46-4a10000019737-21ssh09:31:250
81850770,0irq/46-4a1000008770-21rm11:48:120
81850770,0irq/46-4a10000030969-21kworker/u2:410:31:570
81850770,0irq/46-4a10000017521-21rm09:25:160
307162770,0sleep025907-21kworker/u2:311:23:380
206682770,0chrt15802-21kworker/u2:010:59:060
81850760,0irq/46-4a1000008509-21ssh10:27:240
81850760,0irq/46-4a10000018323-21rm10:53:120
81850760,0irq/46-4a10000016561-21rm09:22:560
81850760,0irq/46-4a10000014959-21rm09:18:510
81950750,0irq/47-4a10000016911-21ssh12:07:090
81850750,0irq/46-4a10000028276-21apt-get07:25:230
81850750,0irq/46-4a10000022114-21rm11:02:280
81850750,0irq/46-4a10000016277-21rm10:47:260
81850750,0irq/46-4a10000012163-21rm11:55:590
81850740,0irq/46-4a10000027475-21rm09:52:090
81850740,0irq/46-4a10000027458-21kworker/u2:112:35:220
81850740,0irq/46-4a10000014269-21rm10:42:090
81850740,0irq/46-4a10000014117-21seq12:00:280
81850740,0irq/46-4a10000011671-21diskmemload12:17:230
81850740,0irq/46-4a1000000-21swapper11:11:510
81850730,0irq/46-4a1000009989-21ssh11:50:580
81850730,0irq/46-4a1000004906-21runrttasks11:39:100
81850730,0irq/46-4a1000003113-21rm11:34:590
81850730,0irq/46-4a10000030969-21kworker/u2:410:07:300
81850730,0irq/46-4a10000022832-21sendmail09:40:030
81850730,0irq/46-4a10000015403-21kworker/u2:609:50:030
81850730,0irq/46-4a10000012932-21chrt09:13:190
81850730,0irq/46-4a10000011873-21diskmemload10:36:010
81850720,0irq/46-4a1000004459-21kworker/u2:708:35:010
81850720,0irq/46-4a1000003866-21munin-run10:15:020
81850720,0irq/46-4a10000018494-21ssh12:10:270
81850720,0irq/46-4a10000011671-21diskmemload12:31:010
322732720,0chrt31004-21kworker/u2:107:50:190
254392720,0chrt13804-21kworker/u2:512:26:540
234202720,0sleep017885-21kworker/u2:009:41:270
81850710,0irq/46-4a1000005599-21munin-run08:30:030
81850710,0irq/46-4a1000005573-21rm11:40:310
81850710,0irq/46-4a10000024428-21runrttasks12:24:420
38492710,0chrt3678-21kworker/u2:008:18:000
81850700,0irq/46-4a1000005200-21kworker/u2:108:50:010
81850700,0irq/46-4a10000031410-21awk07:45:000
81850700,0irq/46-4a10000030434-21kworker/u2:310:25:000
81850700,0irq/46-4a10000028279-21munin-run07:25:020
81850700,0irq/46-4a10000024124-21sh11:07:220
21252700,0sleep01134-21kworker/u2:508:05:540
98332690,0sleep09750-21kworker/u2:108:57:170
81950690,0irq/47-4a1000004206-21ssh10:15:470
81850690,0irq/46-4a10000026575-21munin-node07:15:070
81850690,0irq/46-4a1000002054-21cron07:14:010
81850690,0irq/46-4a10000015403-21kworker/u2:610:04:050
113862690,0sleep011261-21kworker/u2:009:07:500
81950680,0irq/47-4a1000004104-21kworker/u2:508:50:300
296492670,0sleep029496-21kworker/u2:207:32:530
81850660,0irq/46-4a1000002937-21chrt08:11:320
81850630,0irq/46-4a1000002054-21cron08:22:000
25654996250,0cyclictest81850irq/46-4a10000008:45:010
81950600,0irq/47-4a10000031005-1kworker/u3:007:56:100
81850580,0irq/46-4a10000030236-1kworker/u3:307:40:030
25654995134,0cyclictest32081-21runrttasks07:49:440
25654994832,0cyclictest2280-21runrttasks08:35:050
25654994823,0cyclictest0-21swapper09:04:160
25654994730,0cyclictest1589-21sshd08:02:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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