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2026-03-12 - 13:30

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 Thu Mar 12, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11925699910292,7cyclictest391ktimers/300:35:053
11925699910292,7cyclictest391ktimers/300:35:043
1192563998433,33cyclictest20850irq/208-8000000.ethernet21:55:000
1192565996050,5cyclictest1213348-21munin-plugin-st21:10:011
1192563995911,41cyclictest0-21swapper/020:35:010
1192563995911,41cyclictest0-21swapper/020:35:010
1192566995647,5cyclictest1194585-21cat19:20:002
1192565995645,5cyclictest0-21swapper/121:30:211
1192563995449,3cyclictest0-21swapper/023:50:120
119256399513,21cyclictest0-21swapper/000:40:010
119256399513,21cyclictest0-21swapper/000:40:010
1192563995110,12cyclictest1206413-21apt-get20:30:010
1192566994943,3cyclictest1241480-21munin-plugin-st23:55:002
1192565994937,7cyclictest1200455-21grep19:50:291
1192565994936,9cyclictest0-21swapper/122:30:001
119256399489,2cyclictest0-21swapper/023:30:000
1192566994734,9cyclictest0-21swapper/200:00:272
1192563994735,8cyclictest0-21swapper/020:59:590
119256399472,5cyclictest1215548-21meminfo21:20:240
1192566994633,9cyclictest0-21swapper/222:55:192
1192566994633,9cyclictest0-21swapper/222:00:002
1192565994637,5cyclictest1212399-21grep21:00:261
1192565994633,7cyclictest0-21swapper/123:35:021
119256399461,42cyclictest1248334-21apt-key00:35:010
1192566994528,9cyclictest0-21swapper/222:25:012
1192565994537,4cyclictest0-21swapper/123:05:151
1192563994531,10cyclictest0-21swapper/022:05:270
1192566994435,4cyclictest167550irq/134-8000000.ethernet-tx220:40:242
1192566994435,4cyclictest14-21rcu_preempt23:45:302
1192566994434,5cyclictest0-21swapper/223:20:212
1192565994436,5cyclictest1197848-21grep19:35:261
1192566994337,4cyclictest311ktimers/200:25:022
1192566994337,4cyclictest311ktimers/200:25:012
1192566994334,5cyclictest1219183-21grep21:40:292
1192566994334,5cyclictest1208207-21head20:35:272
1192566994334,5cyclictest1208207-21head20:35:272
1192565994328,9cyclictest0-21swapper/119:10:281
1192565994327,8cyclictest0-21swapper/120:35:281
1192565994327,8cyclictest0-21swapper/120:35:281
1192563994330,8cyclictest0-21swapper/023:35:020
119256399432,4cyclictest0-21swapper/020:15:010
119256399431,40cyclictest0-21swapper/000:00:000
1192566994229,9cyclictest0-21swapper/219:10:272
1192565994231,5cyclictest0-21swapper/119:55:261
1192565994230,8cyclictest0-21swapper/122:40:011
1192563994236,4cyclictest1243267-21munin-run00:05:000
1192563994232,6cyclictest0-21swapper/021:40:280
1192563994231,8cyclictest0-21swapper/000:25:310
1192563994231,8cyclictest0-21swapper/000:25:310
1192563994230,8cyclictest0-21swapper/023:05:280
1192563994230,8cyclictest0-21swapper/022:55:280
1192563994229,9cyclictest0-21swapper/022:10:290
1192563994229,8cyclictest0-21swapper/022:40:000
1192563994228,11cyclictest0-21swapper/019:25:280
119256399422,4cyclictest0-21swapper/019:15:280
119256399422,38cyclictest0-21swapper/020:05:190
1192566994133,4cyclictest1217459-21grep21:30:282
1192566994132,5cyclictest1220841-21grep21:50:292
1192566994130,8cyclictest0-21swapper/223:15:002
1192566994129,9cyclictest0-21swapper/219:20:232
1192566994126,8cyclictest0-21swapper/222:35:282
1192566994125,9cyclictest0-21swapper/219:30:202
1192566994121,11cyclictest0-21swapper/221:35:192
1192565994132,5cyclictest0-21swapper/100:15:291
1192565994131,5cyclictest0-21swapper/120:20:251
1192565994129,5cyclictest0-21swapper/119:25:291
1192565994128,9cyclictest0-21swapper/121:25:271
1192565994126,9cyclictest0-21swapper/123:15:301
1192565994125,11cyclictest0-21swapper/122:55:011
1192563994130,8cyclictest0-21swapper/021:35:270
1192563994130,7cyclictest0-21swapper/019:40:260
1192563994129,8cyclictest0-21swapper/000:05:260
1192563994128,9cyclictest0-21swapper/020:00:010
119256399412,5cyclictest1232954-21munin-run23:05:010
119256399411,35cyclictest0-21swapper/021:30:020
1192563994111,28cyclictest1204512-21rt-features20:15:290
1192566994024,9cyclictest0-21swapper/222:50:262
1192565994029,6cyclictest0-21swapper/119:30:271
1192565994029,4cyclictest0-21swapper/100:25:231
1192565994029,4cyclictest0-21swapper/100:25:231
1192565994026,7cyclictest0-21swapper/120:00:291
1192563994032,5cyclictest1193557-21latency_hist19:15:020
1192563994029,8cyclictest0-21swapper/021:55:310
1192563994029,7cyclictest0-21swapper/021:05:280
1192563994029,7cyclictest0-21swapper/019:20:270
1192563994028,8cyclictest0-21swapper/022:25:280
1192563994028,8cyclictest0-21swapper/021:00:270
1192563994028,8cyclictest0-21swapper/000:15:290
1192563994026,8cyclictest0-21swapper/019:30:270
119256399401,4cyclictest0-21swapper/020:50:200
1192566993933,4cyclictest167550irq/134-8000000.ethernet-tx221:15:172
1192566993931,4cyclictest167550irq/134-8000000.ethernet-tx219:45:232
1192566993931,4cyclictest167550irq/134-8000000.ethernet-tx200:05:282
1192566993930,5cyclictest1232871-21grep23:00:272
1192566993930,5cyclictest0-21swapper/223:15:222
1192566993929,5cyclictest0-21swapper/222:05:272
1192566993928,7cyclictest0-21swapper/219:55:272
1192565993931,5cyclictest1240642-21munin-plugin-st23:50:001
1192565993930,5cyclictest0-21swapper/119:40:241
1192565993929,6cyclictest1222535-21grep22:00:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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