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2025-12-30 - 08:18

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot6s.osadl.org (updated Tue Dec 30, 2025 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
288958997525,43cyclictest343661-21grep00:25:300
288958997525,43cyclictest343661-21grep00:25:300
288958997110,22cyclictest0-21swapper/020:20:010
28895899707,29cyclictest0-21swapper/022:30:020
288958996712,47cyclictest0-21swapper/022:40:010
288958996435,2cyclictest337916-21apt-get23:55:140
288958996427,34cyclictest342461-21/usr/sbin/munin00:20:230
288958996320,37cyclictest339567-21latency_hist00:05:010
28896399623,20cyclictest30-21rcuc/223:10:012
288958996224,9cyclictest291385-21tr19:20:250
28896399616,19cyclictest30-21rcuc/219:45:012
288958996031,3cyclictest335049-21/usr/sbin/munin23:35:300
288958996013,19cyclictest0-21swapper/021:05:010
288958995941,13cyclictest0-21swapper/021:15:130
288958995931,14cyclictest0-21swapper/023:30:150
288963995850,5cyclictest0-21swapper/200:10:012
288958995831,13cyclictest0-21swapper/020:45:150
288958995817,38cyclictest299961-21ptp4l20:10:280
28895899581,4cyclictest0-21swapper/019:45:110
28896399575,26cyclictest30-21rcuc/222:05:022
28896399575,26cyclictest30-21rcuc/222:05:012
288961995750,4cyclictest231ktimers/123:40:011
288958995735,14cyclictest0-21swapper/019:40:140
288958995729,3cyclictest319320-21/usr/sbin/munin22:05:200
28896199569,8cyclictest320728-21apt-get22:15:021
288958995610,42cyclictest309072-21fschecks_time21:05:220
288961995510,19cyclictest22-21rcuc/123:15:031
288958995540,11cyclictest328235-21/usr/sbin/munin22:55:280
288958995538,12cyclictest0-21swapper/021:45:130
288958995515,38cyclictest0-21swapper/020:25:250
288958995437,12cyclictest20850irq/208-8000000.ethernet19:15:130
288958995436,13cyclictest0-21swapper/021:35:150
288958995431,11cyclictest0-21swapper/023:00:140
288958995425,27cyclictest307926-21latency_hist21:00:010
288958995417,32cyclictest0-21swapper/022:20:010
288958995411,8cyclictest318106-21apt-get22:00:010
288963995339,9cyclictest0-21swapper/221:15:002
288958995335,12cyclictest0-21swapper/021:25:160
288958995335,12cyclictest0-21swapper/021:25:150
288958995325,3cyclictest292008-21df19:25:180
288958995321,27cyclictest330064-21unixbench_singl23:05:280
288958995238,10cyclictest0-21swapper/022:50:140
288958995236,9cyclictest0-21swapper/020:05:150
288958995236,9cyclictest0-21swapper/020:05:150
288958995233,15cyclictest0-21swapper/022:00:150
288958995233,15cyclictest0-21swapper/022:00:150
288958995233,13cyclictest0-21swapper/000:15:140
288958995222,27cyclictest335451-21df23:40:170
288958995211,39cyclictest0-21swapper/022:15:000
288958995139,9cyclictest332929-21/usr/sbin/munin23:25:170
288958995134,13cyclictest0-21swapper/020:20:140
288958995134,13cyclictest0-21swapper/020:20:140
288958995115,33cyclictest292985-21sh19:30:220
288958995037,11cyclictest306607-21/usr/sbin/munin20:50:240
288958995032,13cyclictest0-21swapper/020:00:140
288958995023,3cyclictest325327-21diskstats22:40:190
288958995015,8cyclictest345450-21latency_hist00:40:010
288963994942,4cyclictest167550irq/134-8000000.ethernet-tx221:05:302
28896199495,14cyclictest0-21swapper/120:45:011
288958994943,3cyclictest303849-21/usr/sbin/munin20:35:210
288958994943,3cyclictest303849-21/usr/sbin/munin20:35:200
288958994939,8cyclictest332630-21sshd23:20:310
288958994937,8cyclictest303364-21/usr/sbin/munin20:30:260
288958994933,13cyclictest339850-21/usr/sbin/munin00:05:220
288958994931,15cyclictest0-21swapper/019:10:150
288958994931,13cyclictest0-21swapper/022:25:160
288958994917,3cyclictest311592-21tune2fs21:20:190
288958994912,31cyclictest0-21swapper/023:15:010
288963994839,5cyclictest336874-21munin-plugin-st23:50:002
288961994828,14cyclictest231ktimers/119:35:141
288958994839,6cyclictest337391-21/usr/sbin/munin23:50:260
288958994838,7cyclictest304798-21dropbear20:40:220
288958994837,8cyclictest344001-21/usr/sbin/munin00:30:210
28895899483,6cyclictest315662-21rm21:45:010
288958994832,12cyclictest0-21swapper/019:35:160
288958994821,3cyclictest310256-21/usr/sbin/munin21:10:270
288958994817,28cyclictest0-21swapper/022:25:020
28896399472,15cyclictest30-21rcuc/200:05:022
288961994738,5cyclictest323359-21munin-run22:30:001
288961994730,12cyclictest0-21swapper/122:00:011
288958994731,12cyclictest0-21swapper/000:10:150
288958994713,29cyclictest296644-21cut19:50:270
288958994713,29cyclictest296644-21cut19:50:270
288963994636,5cyclictest344581-21munin-plugin-st00:34:592
28896199461,4cyclictest0-21swapper/119:20:011
288958994637,7cyclictest297624-21sshd19:55:310
288958994634,9cyclictest316977-21/usr/sbin/munin21:50:250
288958994633,10cyclictest313664-21/usr/sbin/munin21:30:290
288958994618,26cyclictest336285-21df23:45:150
288958994527,13cyclictest331600-21/usr/sbin/munin23:15:280
28895899451,5cyclictest0-21swapper/019:10:010
28895899451,5cyclictest0-21swapper/019:10:010
288963994436,5cyclictest30-21rcuc/220:40:012
288963994436,5cyclictest30-21rcuc/220:40:012
288963994431,8cyclictest338558-21munin-plugin-st00:00:012
288961994434,7cyclictest321347-21phc2sys22:15:241
288961994424,14cyclictest231ktimers/120:45:161
288958994433,8cyclictest326099-21apt-get22:45:120
288961994332,6cyclictest0-21swapper/122:05:321
288963994233,5cyclictest0-21swapper/223:35:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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