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2024-07-27 - 06:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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.
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 20 highest latencies:
System rackeslot5s.osadl.org (updated Sat Jul 27, 2024 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15809992721,5cyclictest0-21swapper/200:40:002
1580999270,6cyclictest13510-21munin-run22:55:012
15803992720,6cyclictest5722-21ssh22:47:400
1580399270,23cyclictest6449-21sh21:40:130
1580399270,1cyclictest4375-21df_inode22:12:400
1580399270,0cyclictest9789-21diskmemload23:16:190
15809992623,3cyclictest0-21swapper/200:18:332
15809992622,4cyclictest0-21swapper/221:18:152
1580999260,26cyclictest0-21swapper/223:35:022
1580999260,25cyclictest581-21dbus-daemon19:35:012
1580999260,25cyclictest434-21ssh23:48:032
1580999260,22cyclictest9789-21diskmemload22:43:202
1580999260,1cyclictest0-21swapper/221:45:162
1580999260,0cyclictest0-21swapper/200:10:182
1580699260,25cyclictest0-21swapper/123:37:371
15803992625,1cyclictest62050irq/126-eno123:55:020
1581399250,24cyclictest0-21swapper/300:03:583
15809992521,4cyclictest9789-21diskmemload22:18:122
15809992520,5cyclictest25487-21apt-get20:37:372
1580999250,24cyclictest29193-21ssh21:30:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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