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2026-03-07 - 05:54

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 Fri Mar 06, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
512563995946,9cyclictest311ktimers/209:40:132
51255999580,2cyclictest0-21swapper/010:30:110
51255999580,2cyclictest0-21swapper/010:30:110
512562995744,8cyclictest561295-21munin-plugin-st11:55:001
512562995647,5cyclictest522209-21apt-key08:05:011
512562995439,11cyclictest0-21swapper/109:50:001
512563995244,5cyclictest0-21swapper/210:20:012
512563995244,5cyclictest0-21swapper/210:20:012
512563995130,17cyclictest311ktimers/212:00:142
512563995034,9cyclictest0-21swapper/212:15:282
512559995043,4cyclictest167350irq/118-8000000.ethernet-tx011:55:290
512559995042,4cyclictest167350irq/118-8000000.ethernet-tx011:05:240
512563994933,11cyclictest0-21swapper/211:50:292
512562994939,7cyclictest543478-21munin-plugin-st10:10:011
512563994835,8cyclictest0-21swapper/207:40:242
512563994827,16cyclictest311ktimers/210:25:132
512562994836,8cyclictest0-21swapper/110:50:311
512562994833,9cyclictest0-21swapper/107:30:291
512562994829,13cyclictest0-21swapper/109:35:281
512562994827,12cyclictest0-21swapper/111:40:271
512559994839,6cyclictest524722-21sendmail08:20:000
51255999481,44cyclictest0-21swapper/008:05:110
51256399474,24cyclictest30-21rcuc/212:10:022
512563994733,10cyclictest0-21swapper/208:05:272
51256299474,16cyclictest22-21rcuc/107:10:021
51255999474,15cyclictest0-21swapper/010:30:000
512559994740,4cyclictest167350irq/118-8000000.ethernet-tx007:40:200
512559994729,15cyclictest0-21swapper/009:10:000
512559994729,15cyclictest0-21swapper/009:10:000
512563994632,8cyclictest0-21swapper/208:15:002
512563994632,11cyclictest311ktimers/208:35:132
512563994631,9cyclictest0-21swapper/209:30:292
512563994631,11cyclictest526361-21grep08:25:282
512563994631,11cyclictest526361-21grep08:25:272
512563994626,14cyclictest311ktimers/210:55:142
512563994625,16cyclictest311ktimers/211:25:142
512562994629,9cyclictest0-21swapper/108:05:281
51255999464,20cyclictest15-21rcuc/011:35:010
512559994639,4cyclictest167350irq/118-8000000.ethernet-tx008:45:270
512559994638,6cyclictest131ktimers/008:55:180
51256399455,28cyclictest32-21ksoftirqd/208:50:172
512563994539,4cyclictest30-21rcuc/211:35:172
512563994531,10cyclictest535657-21grep09:20:272
512563994529,10cyclictest0-21swapper/208:55:272
512563994527,11cyclictest0-21swapper/212:30:222
512563994527,11cyclictest0-21swapper/212:30:212
512563994523,12cyclictest0-21swapper/209:55:022
512562994537,5cyclictest563833-21munin-plugin-st12:10:011
512562994534,7cyclictest562137-21munin-plugin-st11:59:591
512562994533,8cyclictest0-21swapper/108:35:281
512562994533,8cyclictest0-21swapper/107:55:001
512559994538,4cyclictest0-21swapper/011:40:020
512563994434,6cyclictest0-21swapper/207:50:282
512563994428,11cyclictest0-21swapper/209:45:202
512562994429,8cyclictest0-21swapper/110:35:311
512562994428,10cyclictest0-21swapper/108:20:281
512562994423,14cyclictest0-21swapper/110:20:271
51255999444,10cyclictest15-21rcuc/012:15:020
512559994435,4cyclictest167350irq/118-8000000.ethernet-tx009:40:230
512559994415,4cyclictest131ktimers/009:45:270
512563994334,5cyclictest0-21swapper/207:30:272
512563994331,8cyclictest536446-21grep09:25:282
512563994328,6cyclictest0-21swapper/211:30:192
512563994328,11cyclictest0-21swapper/210:40:242
512563994327,9cyclictest0-21swapper/208:05:012
512563994326,8cyclictest0-21swapper/212:25:272
512563994325,11cyclictest0-21swapper/212:35:212
512563994319,18cyclictest311ktimers/207:55:102
512562994330,8cyclictest0-21swapper/110:45:281
512562994329,9cyclictest0-21swapper/112:15:291
512562994329,9cyclictest0-21swapper/109:40:281
51255999431,12cyclictest513384-21munin-node07:15:020
512563994228,10cyclictest0-21swapper/208:15:282
512563994225,11cyclictest0-21swapper/211:45:262
512563994211,3cyclictest519169-21if_eth107:45:222
512562994229,8cyclictest0-21swapper/107:45:291
512562994227,9cyclictest0-21swapper/110:00:281
512562994227,10cyclictest0-21swapper/112:25:281
512562994227,10cyclictest0-21swapper/107:55:271
512559994235,4cyclictest0-21swapper/011:50:010
512559994234,4cyclictest167350irq/118-8000000.ethernet-tx012:00:270
512559994233,5cyclictest538527-21cat09:40:030
512559994233,4cyclictest0-21swapper/007:20:300
51255999421,3cyclictest0-21swapper/009:30:010
51255999421,36cyclictest0-21swapper/010:20:020
51255999421,36cyclictest0-21swapper/010:20:020
51255999421,35cyclictest0-21swapper/007:20:020
512563994130,6cyclictest0-21swapper/209:15:292
512563994128,7cyclictest0-21swapper/211:05:282
512563994125,9cyclictest0-21swapper/208:45:302
512563994124,11cyclictest0-21swapper/209:05:302
512563994124,11cyclictest0-21swapper/209:05:302
512563994122,13cyclictest30-21rcuc/209:40:012
512563994120,16cyclictest311ktimers/211:10:122
512563994120,16cyclictest311ktimers/211:10:122
512562994129,8cyclictest0-21swapper/108:15:271
512562994129,7cyclictest0-21swapper/111:05:281
512562994128,8cyclictest0-21swapper/111:40:021
512562994128,8cyclictest0-21swapper/107:10:281
512562994127,9cyclictest0-21swapper/108:40:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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