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2026-06-18 - 09:04

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 Jun 18, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
389236099831,3cyclictest0-21swapper/021:35:010
3892361998128,45cyclictest0-21swapper/100:25:011
389236099775,48cyclictest0-21swapper/020:15:020
389236199751,64cyclictest0-21swapper/121:35:021
389236099731,65cyclictest3897406-21processes19:35:270
3892360996933,32cyclictest3907934-21grep20:35:290
389236099692,60cyclictest3921516-21uname21:55:250
389236099681,64cyclictest3924257-21unixbench_singl22:10:300
389236099681,60cyclictest3932771-21unixbench_singl23:00:280
3892361996719,36cyclictest0-21swapper/123:15:211
389236099671,64cyclictest0-21swapper/022:45:250
389236099671,4cyclictest3927296-21irqstats22:30:220
389236099671,3cyclictest3897663-21apt-get19:40:050
389236099661,59cyclictest3920317-21fschecks_time21:50:180
389236699657,13cyclictest3913893-21apt-get21:15:022
389236099652,3cyclictest3893973-21phc2sys19:15:250
3892360996520,41cyclictest3493028-1kworker/0:2H+mmc_complete00:05:010
389236099651,56cyclictest3915118-21diskstats21:20:160
3892361996425,31cyclictest0-21swapper/121:20:281
389236099642,58cyclictest3946407-21/usr/sbin/munin00:20:290
389236099641,61cyclictest3912190-21users21:00:290
3892361996340,17cyclictest3931991-21sendmail23:00:001
3892360996326,33cyclictest3923523-21latency_hist22:10:010
3892360996326,33cyclictest3923523-21latency_hist22:10:000
389236099632,57cyclictest3901697-21phc2sys-jitter20:00:250
389236099631,55cyclictest0-21swapper/021:15:020
389236099631,4cyclictest3938243-21df23:35:160
389236099631,4cyclictest0-21swapper/023:50:120
3892361996225,29cyclictest3920778-21unixbench_singl21:50:261
3892361996219,38cyclictest0-21swapper/119:10:281
3892361996216,38cyclictest0-21swapper/120:10:251
389236099624,5cyclictest3945817-21cat00:20:010
3892360996227,30cyclictest0-21swapper/022:15:200
389236099622,4cyclictest3928037-21diskstats22:35:180
389236099622,4cyclictest3928037-21diskstats22:35:170
389236099621,59cyclictest3922491-21unixbench_multi22:00:260
389236099621,54cyclictest3909877-21/usr/sbin/munin20:50:120
389236099621,4cyclictest3906800-21meminfo20:30:210
389236099621,3cyclictest3947837-21perl00:30:200
389236099621,3cyclictest3947837-21perl00:30:190
3892361996127,26cyclictest0-21swapper/123:00:281
3892361996121,34cyclictest0-21swapper/100:00:311
389236099612,56cyclictest3904469-21unixbench_singl20:15:270
3892360996118,9cyclictest3934951-21ssh23:15:180
389236099611,58cyclictest0-21swapper/019:30:150
389236099611,58cyclictest0-21swapper/019:30:150
389236099611,57cyclictest3929384-21unixbench_singl22:40:290
3892361996018,35cyclictest0-21swapper/119:30:271
3892361996018,35cyclictest0-21swapper/119:30:271
389236099606,51cyclictest0-21swapper/023:15:000
3892360996031,25cyclictest3933681-21munin-plugin-st23:10:010
389236099602,4cyclictest3930570-21df_inode22:50:170
3892360996023,32cyclictest0-21swapper/021:45:180
389236099601,56cyclictest3893087-21unixbench_singl19:10:290
3892361995923,28cyclictest0-21swapper/120:40:321
389236099591,56cyclictest3900794-21memory19:55:250
3892361995815,35cyclictest0-21swapper/120:25:281
3892361995814,34cyclictest0-21swapper/122:45:281
3892361995813,38cyclictest1660-21snmpd22:19:171
389236099584,14cyclictest3926768-21grep22:25:280
389236099582,52cyclictest0-21swapper/020:25:260
389236099582,3cyclictest3947082-21irqstats00:25:230
3892360995816,7cyclictest0-21swapper/023:45:190
3892360995816,7cyclictest0-21swapper/023:45:190
389236099581,4cyclictest3908501-21memory20:40:270
389236099581,3cyclictest3943450-21sh00:05:220
389236099581,3cyclictest3943450-21sh00:05:220
389236099581,3cyclictest3939046-21apt-get23:40:150
389236099581,3cyclictest3914444-21irqstats21:15:220
389236099581,3cyclictest3894682-21perl19:20:220
3892361995718,31cyclictest0-21swapper/100:15:301
389236199571,4cyclictest0-21swapper/100:35:021
389236199571,4cyclictest0-21swapper/100:35:011
3892361995714,35cyclictest0-21swapper/121:55:261
389236099571,7cyclictest3944514-21phc2sys00:10:250
389236099571,5cyclictest3904888-21df_inode20:20:180
389236099571,53cyclictest0-21swapper/019:50:290
389236099571,3cyclictest3911017-21meminfo20:55:240
389236099571,3cyclictest3911017-21meminfo20:55:240
389236099571,2cyclictest3931343-21apt-get22:55:130
3892361995621,26cyclictest0-21swapper/123:30:271
389236199561,9cyclictest3910602-21latency_hist20:55:011
3892361995613,36cyclictest167450irq/126-8000000.ethernet-tx120:15:261
389236199561,10cyclictest3940309-21/usr/sbin/munin23:45:261
389236199561,10cyclictest3940309-21/usr/sbin/munin23:45:251
389236099562,51cyclictest3919027-21unixbench_singl21:40:290
389236699557,25cyclictest30-21rcuc/223:25:022
389236199557,39cyclictest0-21swapper/123:35:281
3892361995520,28cyclictest0-21swapper/119:50:291
3892361995520,27cyclictest0-21swapper/123:54:591
3892361995512,36cyclictest3913967-21apt-key21:15:001
3892361995512,34cyclictest0-21swapper/119:35:211
389236099552,4cyclictest3949068-21grep00:35:260
3892360995522,30cyclictest3916047-21sh21:25:190
389236099551,4cyclictest3902257-21df_inode20:05:170
389236099551,4cyclictest3899074-21irqstats19:45:230
389236099551,4cyclictest3899074-21irqstats19:45:220
389236099551,3cyclictest3937609-21irqstats23:30:230
389236099551,3cyclictest3917863-21meminfo21:35:240
389236099551,3cyclictest0-21swapper/023:25:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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