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2026-08-28 - 03:36

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 Aug 28, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3566164998815,66cyclictest3582103-21fschecks_time20:40:210
3566169998675,5cyclictest30-21rcuc/221:35:012
3566169998675,5cyclictest30-21rcuc/221:35:012
356616499851,11cyclictest0-21swapper/021:45:010
3566170998273,6cyclictest0-21swapper/320:40:013
356616699826,51cyclictest3576837-21/usr/sbin/munin20:10:191
356616699771,58cyclictest0-21swapper/100:34:591
356616499742,69cyclictest3591823-21grep21:35:290
356616499741,4cyclictest3602871-21cut22:40:270
356616499712,61cyclictest3572217-21grep19:40:290
356616499711,5cyclictest3579462-21fschecks_count20:25:190
356616499682,30cyclictest3600951-21lsblk22:30:220
3566164996730,23cyclictest0-21swapper/000:10:020
356616499671,55cyclictest0-21swapper/023:25:110
356616499664,5cyclictest3570121-21sh19:30:240
356616499664,57cyclictest0-21swapper/022:50:280
3566164996618,12cyclictest3596529-21apt-get22:05:060
356616499652,4cyclictest3588497-21sed21:15:300
356616499652,4cyclictest3588497-21sed21:15:300
356616499652,4cyclictest3569840-21grep19:30:010
356616499652,4cyclictest3569840-21grep19:30:010
356616499651,7cyclictest3587018-21latency_hist21:10:020
356616499643,57cyclictest3608498-21sh23:15:210
3566164996424,5cyclictest0-21swapper/022:55:210
3566164996424,5cyclictest0-21swapper/022:55:210
356616499641,4cyclictest0-21swapper/021:45:120
356616499641,3cyclictest0-21swapper/000:10:290
356616699631,52cyclictest0-21swapper/120:50:111
356616499631,56cyclictest3609798-21grep23:20:280
356616499631,4cyclictest3619496-21df00:20:170
356616699624,36cyclictest0-21swapper/120:55:011
356616699622,52cyclictest3611735-21apt-get23:35:161
356616699622,52cyclictest3611735-21apt-get23:35:161
3566164996234,25cyclictest3596133-21grep22:00:300
3566164996232,27cyclictest20850irq/208-8000000.ethernet22:15:210
356616499621,6cyclictest274-21systemd-journal22:45:170
356616499621,3cyclictest0-21swapper/021:30:260
356616499621,3cyclictest0-21swapper/021:30:260
3566164996127,31cyclictest0-21swapper/020:55:290
356616499611,5cyclictest3577033-21lsblk20:10:210
356616499611,4cyclictest0-21swapper/019:50:220
356616499611,30cyclictest0-21swapper/020:00:280
356616499611,11cyclictest3594707-21latency_hist21:55:010
356616699605,36cyclictest880-21avahi-daemon00:10:021
356616699601,53cyclictest0-21swapper/123:10:261
356616499605,19cyclictest20850irq/208-8000000.ethernet23:35:010
3566164996024,5cyclictest0-21swapper/000:30:160
356616499601,3cyclictest0-21swapper/021:20:200
356616499601,3cyclictest0-21swapper/020:30:260
356616699593,48cyclictest3612589-21apt-get23:40:131
3566166995930,24cyclictest3596329-21apt-key22:05:011
3566164995929,5cyclictest20850irq/208-8000000.ethernet20:00:000
356616499592,3cyclictest0-21swapper/023:55:220
3566164995923,4cyclictest0-21swapper/000:00:190
356616499591,3cyclictest0-21swapper/023:00:250
356616499591,3cyclictest0-21swapper/000:35:300
3566166995831,22cyclictest0-21swapper/119:10:281
3566166995817,32cyclictest0-21swapper/120:25:271
356616699581,41cyclictest231ktimers/121:45:121
356616499581,55cyclictest0-21swapper/023:40:150
356616499581,4cyclictest0-21swapper/022:40:000
356616499581,35cyclictest0-21swapper/019:15:120
3566166995715,33cyclictest0-21swapper/123:00:021
3566166995715,33cyclictest0-21swapper/123:00:021
356616699571,49cyclictest3582957-21/usr/sbin/munin20:45:221
356616699571,49cyclictest3582957-21/usr/sbin/munin20:45:221
356616699571,48cyclictest3605832-21apt-get23:00:151
356616499571,4cyclictest0-21swapper/021:55:230
356616499571,4cyclictest0-21swapper/021:55:220
356616499571,3cyclictest0-21swapper/023:10:200
356616499571,3cyclictest0-21swapper/023:05:190
356616499571,3cyclictest0-21swapper/020:20:120
356616499571,3cyclictest0-21swapper/000:15:250
356616699561,47cyclictest3589902-21meminfo21:25:251
3566164995624,7cyclictest0-21swapper/019:45:260
356616499561,4cyclictest0-21swapper/019:20:170
356616499561,3cyclictest0-21swapper/022:25:220
356616499561,3cyclictest0-21swapper/020:35:160
3566164995613,41cyclictest3614870-21awk23:50:290
3566164995613,41cyclictest3614870-21awk23:50:290
3566166995520,23cyclictest0-21swapper/100:35:301
356616699551,47cyclictest3569996-21apt-get19:30:151
356616699551,47cyclictest3569508-21/usr/sbin/munin19:25:261
356616699551,47cyclictest3569508-21/usr/sbin/munin19:25:261
356616499554,5cyclictest3566858-21unixbench_multi19:10:270
356616499552,10cyclictest20850irq/208-8000000.ethernet20:05:130
356616499552,10cyclictest20850irq/208-8000000.ethernet20:05:130
3566164995520,8cyclictest0-21swapper/000:30:010
356616499551,52cyclictest0-21swapper/021:10:190
356616499551,4cyclictest3597669-21meminfo22:10:240
356616499551,3cyclictest3599076-21apt-get22:20:170
356616699542,44cyclictest3618810-21/usr/sbin/munin00:15:221
356616699542,44cyclictest3603420-21/usr/sbin/munin22:45:211
356616699542,44cyclictest3597373-21apt-get22:10:151
3566166995422,25cyclictest0-21swapper/123:30:301
356616699541,45cyclictest3615178-21/usr/sbin/munin23:55:191
356616699541,45cyclictest3614398-21/usr/sbin/munin23:50:211
356616699541,45cyclictest3614398-21/usr/sbin/munin23:50:201
356616699541,45cyclictest3610256-21/usr/sbin/munin23:25:211
356616699541,44cyclictest3620282-21apt-get00:25:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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