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2026-07-29 - 04:54

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 Wed Jul 29, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23444319910681,16cyclictest391ktimers/323:45:063
234443199771,65cyclictest0-21swapper/300:40:013
2344425997713,18cyclictest0-21swapper/020:15:010
2344425997713,18cyclictest0-21swapper/020:15:010
234443199741,60cyclictest0-21swapper/322:55:163
2344429997320,10cyclictest0-21swapper/200:00:332
2344429997232,34cyclictest0-21swapper/220:50:002
2344428997263,6cyclictest0-21swapper/122:10:011
2344425997223,41cyclictest2356869-21tune2fs20:20:200
2344429997127,33cyclictest0-21swapper/200:30:282
2344425997119,48cyclictest0-21swapper/000:30:010
2344425997119,26cyclictest0-21swapper/019:40:010
2344429997022,8cyclictest0-21swapper/223:00:322
2344429996819,41cyclictest0-21swapper/221:20:292
2344428996814,15cyclictest2382288-21/usr/sbin/munin22:50:191
2344429996727,34cyclictest0-21swapper/220:35:302
2344429996725,38cyclictest0-21swapper/221:50:312
2344425996761,3cyclictest0-21swapper/023:35:010
234442599664,49cyclictest0-21swapper/021:30:010
2344429996525,35cyclictest0-21swapper/223:25:192
2344429996522,6cyclictest0-21swapper/223:15:012
2344425996519,8cyclictest0-21swapper/020:00:010
2344425996519,8cyclictest0-21swapper/020:00:010
2344429996420,39cyclictest0-21swapper/222:40:292
2344429996420,39cyclictest0-21swapper/222:40:292
2344428996456,5cyclictest231ktimers/122:25:011
2344425996423,37cyclictest2347263-21latency_hist19:25:010
2344429996324,32cyclictest0-21swapper/220:25:022
2344428996312,15cyclictest2344422-21cyclictest21:45:191
2344425996311,21cyclictest0-21swapper/023:35:010
2344429996222,6cyclictest0-21swapper/221:10:302
2344429996221,7cyclictest0-21swapper/220:55:302
2344425996242,14cyclictest0-21swapper/021:10:140
2344429996127,27cyclictest0-21swapper/222:45:292
2344429996120,10cyclictest0-21swapper/222:20:002
2344425996142,11cyclictest0-21swapper/022:20:150
234442599608,26cyclictest0-21swapper/019:50:020
2344425996026,4cyclictest2363234-21apt-get21:00:010
2344429995921,5cyclictest0-21swapper/222:35:272
234442899593,19cyclictest22-21rcuc/119:25:011
2344429995821,7cyclictest0-21swapper/219:40:292
2344425995840,13cyclictest0-21swapper/019:15:130
2344425995840,13cyclictest0-21swapper/019:15:130
2344425995820,35cyclictest2393762-21phc2sys23:55:260
2344429995722,6cyclictest0-21swapper/200:20:292
234442999571,20cyclictest0-21swapper/220:20:002
2344425995640,12cyclictest0-21swapper/022:25:120
2344425995639,13cyclictest0-21swapper/021:45:130
2344425995637,15cyclictest0-21swapper/019:25:130
2344425995537,13cyclictest0-21swapper/023:25:120
2344425995523,3cyclictest2400309-21lsblk00:35:190
2344425995519,33cyclictest2386366-21latency_hist23:15:010
234442999544,23cyclictest2373639-21munin-plugin-st22:00:002
2344429995418,6cyclictest0-21swapper/223:20:232
2344429995418,6cyclictest0-21swapper/223:20:232
2344425995415,11cyclictest2386854-21grep23:15:300
2344425995335,13cyclictest0-21swapper/021:50:160
2344425995319,30cyclictest2361489-21grep20:45:300
2344425995315,36cyclictest2390904-21/usr/sbin/munin23:40:170
234442999527,13cyclictest2354771-21sed20:05:282
2344429995239,9cyclictest2349737-21munin-plugin-st19:39:592
2344429995238,7cyclictest2385350-21grep23:05:332
2344425995238,10cyclictest0-21swapper/020:15:140
2344425995233,15cyclictest0-21swapper/022:10:140
2344425995221,5cyclictest2397461-21munin-run00:20:000
2344425995221,5cyclictest2397461-21munin-run00:20:000
2344428995121,11cyclictest2378913-21/usr/sbin/munin22:30:191
2344425995135,11cyclictest0-21swapper/000:10:130
2344425995121,28cyclictest2351834-21/usr/sbin/munin19:50:220
2344425995118,30cyclictest0-21swapper/019:30:220
2344425995114,34cyclictest2354561-21/usr/sbin/munin20:05:270
2344425995110,4cyclictest0-21swapper/000:30:280
2344428995031,13cyclictest231ktimers/122:55:131
2344425995033,12cyclictest0-21swapper/019:10:150
2344425995023,24cyclictest2353411-21/usr/sbin/munin20:00:180
234442899498,10cyclictest2367652-21apt-get21:25:021
2344428994940,5cyclictest2353968-21munin-plugin-st20:05:001
2344425994936,8cyclictest0-21swapper/021:15:160
2344425994919,27cyclictest2385518-21ls23:10:010
2344425994915,31cyclictest2380413-21latency_hist22:39:590
234442999486,10cyclictest2378634-21sed22:25:272
234442999484,19cyclictest2370258-21sh21:40:002
2344428994842,4cyclictest231ktimers/123:10:011
2344428994834,7cyclictest0-21swapper/100:15:001
234442599489,3cyclictest2361760-21apt-get20:50:140
234442599489,3cyclictest2361760-21apt-get20:50:140
2344425994835,9cyclictest0-21swapper/022:30:140
2344425994820,3cyclictest2358452-21diskstats20:30:170
2344425994815,4cyclictest0-21swapper/021:30:200
2344425994814,32cyclictest2359411-21ssh20:35:210
234442999471,27cyclictest2378913-21/usr/sbin/munin22:30:272
2344425994739,5cyclictest2382929-21munin-plugin-st22:55:000
2344425994738,6cyclictest2373926-21/usr/sbin/munin22:00:180
2344425994738,6cyclictest2373926-21/usr/sbin/munin22:00:180
2344425994737,6cyclictest0-21swapper/021:05:110
2344425994733,11cyclictest2373071-21/usr/sbin/munin21:55:190
2344425994721,3cyclictest2370533-21df21:40:160
2344429994635,7cyclictest2352162-21grep19:50:302
2344428994632,6cyclictest0-21swapper/120:50:311
2344428994632,6cyclictest0-21swapper/120:50:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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