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2025-07-20 - 04:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, slot #4

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackfslot4s.osadl.org (updated Sun Jul 20, 2025 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2376221270,2sleep023764-21awk21:20:370
3021521250,2chrt30213-21ntpq19:26:000
2284921250,2chrt22845-21ps00:12:130
2083221190,2chrt20833-21sleep20:11:070
1228621130,2chrt12285-21/usr/sbin/munin19:55:270
308721090,2chrt3086-21grep00:35:410
762021060,2chrt7619-21ssh21:49:510
2807621000,2sleep028078-21grep21:27:260
313322880,2sleep031335-21mailstats00:27:270
327062870,2sleep032708-21sed19:30:540
83602810,2sleep08362-21irqrtprio23:46:080
267792730,2sleep026781-21sort00:20:050
266282730,2sleep026629-21mii-tool23:21:070
307972670,1sleep030800-21sed21:32:260
5962610,2sleep0594-21ntp_kernel_pll_21:36:280
21469906139,13cyclictest29497-21cut23:26:070
21469906039,14cyclictest30187-21latency_hist22:30:030
21469906038,13cyclictest1681-21ntpq22:36:180
21469906037,15cyclictest2536-21sleep00:34:510
21469905838,12cyclictest1996-21ssh23:35:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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