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2025-11-24 - 10:27

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 Mon Nov 24, 2025 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3728317991427,124cyclictest0-21swapper/023:25:010
3728317991427,124cyclictest0-21swapper/023:25:010
3728317997733,10cyclictest0-21swapper/023:50:260
3728317997063,4cyclictest0-21swapper/000:15:160
3728321996830,31cyclictest30-21rcuc/219:35:022
372831799681,55cyclictest0-21swapper/019:10:140
372831799652,48cyclictest0-21swapper/019:40:140
3728319996319,15cyclictest22-21rcuc/120:05:181
372831999631,31cyclictest0-21swapper/121:05:191
372831799625,13cyclictest0-21swapper/000:30:010
3728317996243,9cyclictest3737127-21apt-key20:00:010
3728321996120,17cyclictest3745632-21cat20:50:002
3728319996023,18cyclictest1325-21sendmail-mta23:35:141
3728319996023,18cyclictest1325-21sendmail-mta23:35:141
3728319996012,13cyclictest22-21rcuc/123:45:011
3728321995940,11cyclictest311ktimers/223:50:142
3728321995837,15cyclictest311ktimers/222:15:132
3728317995743,2cyclictest0-21swapper/000:20:110
3728317995743,2cyclictest0-21swapper/000:20:110
372831799571,4cyclictest0-21swapper/023:10:010
372831799571,4cyclictest0-21swapper/023:10:000
3728317995647,5cyclictest0-21swapper/021:25:140
372831999556,23cyclictest0-21swapper/123:45:011
372831999551,35cyclictest0-21swapper/120:50:011
3728319995444,6cyclictest3740479-21run-parts20:20:011
3728319995444,6cyclictest3740479-21run-parts20:20:011
372831999538,17cyclictest3773224-21/usr/sbin/munin23:30:201
372831999534,16cyclictest3770684-21/usr/sbin/munin23:15:181
3728319995140,9cyclictest1287-21cron00:34:591
3728321995042,4cyclictest3751737-21munin-plugin-st21:25:002
3728319995045,3cyclictest0-21swapper/122:35:011
3728317995036,5cyclictest3778900-21head00:00:290
3728321994930,11cyclictest311ktimers/220:25:132
3728319994931,13cyclictest3762903-21apt-key22:30:011
3728321994836,8cyclictest3784955-21sendmail00:40:002
3728321994828,12cyclictest311ktimers/222:45:132
3728317994840,4cyclictest21050irq/252-8000000.ethernet19:35:150
3728317994839,5cyclictest21050irq/252-8000000.ethernet22:30:310
372831799482,3cyclictest3776409-21latency_hist23:50:000
3728321994732,10cyclictest3731023-21grep19:20:312
372831999474,33cyclictest3751015-21apt-key21:20:021
372831999474,33cyclictest3751015-21apt-key21:20:021
372831999474,17cyclictest3769004-21/usr/sbin/munin23:05:191
372831999474,17cyclictest3769004-21/usr/sbin/munin23:05:191
372831999473,22cyclictest3780911-21/usr/sbin/munin00:15:231
3728319994729,11cyclictest0-21swapper/119:50:281
3728319994728,10cyclictest0-21swapper/100:20:281
3728319994728,10cyclictest0-21swapper/100:20:281
3728317994741,4cyclictest0-21swapper/020:45:120
3728317994731,9cyclictest3761869-21grep22:20:290
372831799472,4cyclictest3735860-21phc2sys19:50:270
3728321994632,9cyclictest311ktimers/200:00:132
372831799468,5cyclictest0-21swapper/000:00:000
3728321994531,8cyclictest0-21swapper/221:20:012
3728321994531,8cyclictest0-21swapper/221:20:012
3728321994530,10cyclictest3764573-21munin-plugin-st22:40:002
3728321994530,10cyclictest3764573-21munin-plugin-st22:39:592
3728321994530,10cyclictest0-21swapper/219:55:002
3728321994529,12cyclictest311ktimers/221:40:102
3728321994527,11cyclictest0-21swapper/222:25:222
3728319994530,11cyclictest3761104-21munin-plugin-st22:20:001
3728321994431,9cyclictest0-21swapper/222:50:292
3728319994430,9cyclictest0-21swapper/122:00:301
3728317994435,4cyclictest21050irq/252-8000000.ethernet22:35:190
3728317994435,4cyclictest21050irq/252-8000000.ethernet22:35:190
3728319994319,13cyclictest0-21swapper/119:15:131
3728319994319,12cyclictest0-21swapper/121:10:121
372831999431,10cyclictest0-21swapper/121:55:011
3728317994336,4cyclictest21050irq/252-8000000.ethernet20:05:270
3728317994334,4cyclictest21050irq/252-8000000.ethernet20:55:170
3728317994332,4cyclictest21050irq/252-8000000.ethernet20:35:190
3728317994331,7cyclictest3779687-21sed00:05:320
372831799432,38cyclictest0-21swapper/022:40:120
372831799432,35cyclictest3766207-21unixbench_singl22:45:270
372831799431,4cyclictest0-21swapper/021:15:120
372831799431,4cyclictest0-21swapper/021:15:120
3728321994230,8cyclictest0-21swapper/220:15:002
3728321994230,6cyclictest0-21swapper/220:45:002
3728321994224,13cyclictest311ktimers/219:35:132
3728319994231,5cyclictest0-21swapper/119:14:591
3728319994225,11cyclictest3784307-21apt-get00:35:161
3728319994223,14cyclictest231ktimers/119:35:131
3728319994216,3cyclictest3732757-21users19:30:301
3728317994235,4cyclictest0-21swapper/021:20:160
3728317994234,4cyclictest21050irq/252-8000000.ethernet22:50:220
3728317994234,4cyclictest21050irq/252-8000000.ethernet22:05:140
3728317994234,4cyclictest21050irq/252-8000000.ethernet20:50:170
3728317994232,4cyclictest21050irq/252-8000000.ethernet20:00:190
3728317994232,4cyclictest21050irq/252-8000000.ethernet20:00:190
3728321994128,8cyclictest311ktimers/220:20:152
3728321994128,10cyclictest311ktimers/219:15:152
3728321994126,10cyclictest0-21swapper/223:10:012
3728321994126,10cyclictest0-21swapper/223:10:012
3728321994125,10cyclictest0-21swapper/223:15:212
3728321994124,12cyclictest0-21swapper/200:25:292
3728319994132,5cyclictest168350irq/126-8000000.ethernet-tx121:40:151
3728319994121,14cyclictest0-21swapper/121:35:151
3728319994117,11cyclictest3728313-21cyclictest19:20:141
372831799413,6cyclictest3748106-21head21:00:310
3728317994136,2cyclictest0-21swapper/021:45:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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