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2025-08-30 - 01:02

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 Fri Aug 29, 2025 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2612721270,3chrt26128-21grep12:25:370
924721200,2chrt9248-21sleep10:56:060
897521160,2chrt8974-21cut07:55:240
2406321150,2chrt24061-21/usr/sbin/munin09:26:370
329721120,3chrt3300-21grep10:45:550
2885821100,2chrt28859-21sleep07:30:500
30121070,2chrt302-21sleep11:39:040
187312890,2sleep018729-21open_files09:17:160
277672880,1sleep027768-21ssh11:30:230
39922780,1sleep03990-21aten2.4-expect07:45:260
18228907317,48cyclictest29871-21ssh10:35:480
1822890725,48cyclictest28091-21ntp_states10:31:490
18228907211,51cyclictest32028-21irqrtprio12:36:060
1822890715,56cyclictest7948-21ssh09:56:200
18228907112,52cyclictest29628-21sort08:35:410
1822890707,53cyclictest20779-21ssh11:16:540
1822890707,52cyclictest18349-21apt-get07:10:190
1822890707,52cyclictest11103-21apt-get11:00:250
1822890706,54cyclictest25547-21ssh10:27:320
1822890705,55cyclictest800-21apt-get11:40:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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