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2026-03-10 - 08:11

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 Tue Mar 10, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
361301499903,41cyclictest3660263-21/usr/sbin/munin23:45:191
3613016998012,29cyclictest30-21rcuc/220:05:002
3613014996943,21cyclictest3615802-21munin-plugin-st19:25:001
361301499691,54cyclictest0-21swapper/120:35:131
361301499691,52cyclictest0-21swapper/120:50:151
361301499691,41cyclictest3642220-21kworker/u8:1+events_power_efficient22:15:121
361301499671,53cyclictest0-21swapper/121:55:141
361301499671,53cyclictest0-21swapper/100:10:121
361301499671,51cyclictest0-21swapper/121:05:151
361301699662,45cyclictest32-21ksoftirqd/223:45:192
3613014996517,40cyclictest0-21swapper/100:05:261
361301499651,50cyclictest0-21swapper/122:50:131
361301499651,50cyclictest0-21swapper/121:40:131
361301499651,50cyclictest0-21swapper/120:40:121
361301499651,50cyclictest0-21swapper/120:40:121
3613016996448,12cyclictest311ktimers/200:10:112
3613014996434,24cyclictest3669294-21grep00:35:281
361301499641,51cyclictest0-21swapper/119:45:151
361301499641,49cyclictest0-21swapper/121:10:161
361301499631,49cyclictest0-21swapper/122:10:131
3613014996216,39cyclictest3643026-21grep22:00:281
3613014996119,35cyclictest0-21swapper/100:25:281
361301499611,48cyclictest0-21swapper/120:05:111
361301499611,47cyclictest0-21swapper/121:45:141
361301499611,47cyclictest0-21swapper/121:45:141
361301499611,36cyclictest0-21swapper/120:05:011
3613016996011,19cyclictest3617477-21apt-get19:35:012
361301499605,35cyclictest2181224-1kworker/1:2H+kblockd19:35:041
361301499605,35cyclictest2181224-1kworker/1:2H+kblockd19:35:041
3613014996023,32cyclictest0-21swapper/122:20:201
361301499601,46cyclictest0-21swapper/120:30:141
3613014995928,26cyclictest0-21swapper/100:30:281
3613014995928,26cyclictest0-21swapper/100:30:281
361301499591,50cyclictest3613490-21/usr/sbin/munin19:10:281
361301499591,45cyclictest0-21swapper/120:15:161
361301499591,45cyclictest0-21swapper/120:15:161
361301699581,48cyclictest0-21swapper/222:10:012
361301499582,47cyclictest3657724-21apt-get23:30:151
361301499581,47cyclictest0-21swapper/100:15:141
361301499581,46cyclictest0-21swapper/100:00:121
361301499581,44cyclictest0-21swapper/119:15:111
361301499581,42cyclictest0-21swapper/121:20:131
361301499581,42cyclictest0-21swapper/121:20:131
361301499571,49cyclictest3631980-21/usr/sbin/munin20:55:281
361301499571,47cyclictest3618695-21/usr/sbin/munin19:40:171
361301499562,47cyclictest3666544-21/usr/sbin/munin00:20:251
361301499562,46cyclictest3620606-21memory19:50:261
361301499561,48cyclictest3648687-21/usr/sbin/munin22:35:271
361301499561,48cyclictest3637720-21/usr/sbin/munin21:30:261
361301499561,48cyclictest0-21swapper/120:20:121
361301499561,47cyclictest3662558-21/usr/sbin/munin23:55:291
361301499561,47cyclictest3654346-21apt-get23:10:171
361301499561,47cyclictest3652971-21/usr/sbin/munin23:00:261
361301499561,47cyclictest0-21swapper/120:10:151
361301499552,46cyclictest3635151-21/usr/sbin/munin21:15:281
361301499552,45cyclictest3648027-21/usr/sbin/munin22:30:281
361301499551,47cyclictest3653823-21/usr/sbin/munin23:05:261
361301499551,47cyclictest3617296-21/usr/sbin/munin19:30:261
361301499542,45cyclictest3650134-21/usr/sbin/munin22:45:131
361301499542,45cyclictest3650134-21/usr/sbin/munin22:45:131
361301499542,44cyclictest3640749-21apt-get21:50:131
361301499542,43cyclictest3638327-21/usr/sbin/munin21:35:221
361301499541,45cyclictest3636554-21/usr/sbin/munin21:25:201
361301499541,45cyclictest0-21swapper/123:25:121
361301499532,44cyclictest3659718-21/usr/sbin/munin23:40:251
361301499532,41cyclictest3616002-21apt-get19:25:121
361301499531,44cyclictest3659073-21/usr/sbin/munin23:35:261
361301499531,44cyclictest3655185-21apt-get23:15:141
361301499531,44cyclictest3626674-21/usr/sbin/munin20:25:291
361301499531,39cyclictest0-21swapper/123:50:131
361301499531,39cyclictest0-21swapper/123:50:121
361301399532,4cyclictest3625069-21grep20:15:320
361301399532,4cyclictest3625069-21grep20:15:320
361301499521,44cyclictest3651863-21/usr/sbin/munin22:55:161
361301499521,44cyclictest3647103-21/usr/sbin/munin22:25:271
361301499521,44cyclictest3647103-21/usr/sbin/munin22:25:261
361301499521,44cyclictest3630050-21/usr/sbin/munin20:45:271
361301499521,42cyclictest3643288-21apt-get22:05:111
361301499512,39cyclictest3649205-21apt-get22:40:131
361301499511,44cyclictest0-21swapper/121:00:221
361301499501,42cyclictest3621392-21/usr/sbin/munin19:55:231
3613013995045,4cyclictest0-21swapper/022:30:150
361301499491,42cyclictest3656669-21sshd23:23:181
361301399492,4cyclictest3656130-21fschecks_count23:20:200
361301399474,6cyclictest3667749-21sort00:30:010
3613013994738,6cyclictest0-21swapper/021:45:280
3613013994738,6cyclictest0-21swapper/021:45:270
3613013994736,6cyclictest0-21swapper/023:00:000
361301399471,42cyclictest3625712-21phc2sys20:20:260
361301399471,16cyclictest0-21swapper/019:55:010
3613013994710,15cyclictest3613950-21ptp4l19:15:020
3613013994620,4cyclictest3640803-21ssh21:50:160
3613016994511,10cyclictest32-21ksoftirqd/223:10:012
361301499452,40cyclictest3613023-21grep19:10:011
3613013994531,9cyclictest3614951-21sendmail19:20:000
3613016994430,8cyclictest0-21swapper/221:55:282
3613016994421,12cyclictest311ktimers/222:55:112
3613016994415,15cyclictest311ktimers/220:50:002
3613013994436,4cyclictest167350irq/118-8000000.ethernet-tx022:35:130
3613013994429,11cyclictest0-21swapper/022:45:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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