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2024-07-27 - 14:24

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 50 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
1580999250,24cyclictest0-21swapper/223:31:322
1580999250,20cyclictest0-21swapper/222:47:402
1580999250,1cyclictest3869-21sh21:37:432
1580999250,1cyclictest14735-21ssh22:56:532
1580999250,1cyclictest0-21swapper/200:26:182
1580999250,0cyclictest25558-21ssh23:42:172
15806992523,1cyclictest16084-21ssh21:50:221
15803992521,4cyclictest0-21swapper/021:55:480
1580399250,24cyclictest9789-21diskmemload23:45:330
1580399250,24cyclictest0-21swapper/023:08:060
1580399250,21cyclictest9789-21diskmemload22:25:130
1580399250,1cyclictest0-21swapper/000:23:520
1580399250,0cyclictest0-21swapper/023:54:450
15813992421,2cyclictest19232-21ssh23:01:223
1581399240,24cyclictest0-21swapper/300:31:543
15809992422,2cyclictest0-21swapper/223:25:262
15809992422,1cyclictest9810-21idleruntime-cro21:10:012
15809992421,3cyclictest9789-21diskmemload23:22:002
15809992419,4cyclictest13166-21ssh22:22:052
15809992416,4cyclictest9789-21diskmemload22:06:492
1580999240,20cyclictest9789-21diskmemload21:23:122
1580999240,1cyclictest24908-21sh21:25:532
1580999240,1cyclictest11843-21ssh00:33:522
1580999240,0cyclictest0-21swapper/223:59:172
1580999240,0cyclictest0-21swapper/222:36:292
1580999240,0cyclictest0-21swapper/222:36:292
1580999240,0cyclictest0-21swapper/222:01:392
1580999240,0cyclictest0-21swapper/221:41:382
15806992424,0cyclictest9789-21diskmemload21:55:461
15806992422,1cyclictest26078-21ssh00:15:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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