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2026-05-06 - 07:20

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 Wed May 06, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
366483999676,18cyclictest15-21rcuc/020:40:010
366483999582,2cyclictest0-21swapper/000:25:190
3664839995410,5cyclictest3691367-21apt-get21:45:010
3664842995340,9cyclictest3712567-21grep23:45:301
366483999511,4cyclictest3696020-21df22:10:170
3664843995037,8cyclictest3708443-21munin-plugin-st23:25:002
3664839995038,9cyclictest0-21swapper/000:15:000
3664843994931,12cyclictest0-21swapper/200:15:292
3664842994836,9cyclictest3687137-21sendmail21:20:001
3664839994839,6cyclictest3711819-21munin-plugin-st23:45:000
3664839994831,14cyclictest167350irq/118-8000000.ethernet-tx019:55:250
366483999482,42cyclictest3684341-21ps21:00:260
366483999481,4cyclictest0-21swapper/020:55:180
366483999481,4cyclictest0-21swapper/020:55:180
3664842994727,13cyclictest231ktimers/121:30:111
3664839994640,4cyclictest3700821-21sendmail22:40:000
3664839994640,4cyclictest3700821-21sendmail22:40:000
3664843994513,25cyclictest3673218-21phc2sys19:55:262
3664842994533,8cyclictest0-21swapper/120:25:001
3664839994538,4cyclictest167350irq/118-8000000.ethernet-tx021:15:290
3664839994534,7cyclictest0-21swapper/000:20:300
366483999451,15cyclictest3716119-21apt-get00:10:020
366483999451,15cyclictest3716119-21apt-get00:10:020
3664843994437,4cyclictest3690518-21sendmail21:40:002
3664843994437,4cyclictest3690518-21sendmail21:40:002
3664842994436,4cyclictest3705060-21munin-plugin-st23:05:001
3664842994424,12cyclictest231ktimers/121:20:121
366483999444,11cyclictest15-21rcuc/019:55:010
3664839994436,5cyclictest0-21swapper/023:35:240
3664839994432,8cyclictest0-21swapper/023:30:270
3664839994431,9cyclictest0-21swapper/023:00:290
3664839994429,8cyclictest0-21swapper/021:20:280
366483999441,37cyclictest0-21swapper/019:40:010
366483999441,36cyclictest0-21swapper/023:50:010
3664843994336,4cyclictest0-21swapper/222:05:272
3664843994336,3cyclictest3686294-21munin-plugin-st21:15:002
3664839994332,6cyclictest20850irq/208-8000000.ethernet00:05:010
3664843994231,6cyclictest0-21swapper/220:45:292
3664843994229,8cyclictest0-21swapper/221:00:282
3664843994229,8cyclictest0-21swapper/200:20:312
3664843994227,9cyclictest0-21swapper/223:00:202
3664843994227,10cyclictest0-21swapper/221:50:282
3664843994225,8cyclictest0-21swapper/220:15:272
3664843994225,8cyclictest0-21swapper/220:15:272
366484299425,19cyclictest3708639-21/usr/sbin/munin23:25:181
3664839994235,4cyclictest167350irq/118-8000000.ethernet-tx021:55:210
3664839994235,4cyclictest167350irq/118-8000000.ethernet-tx021:55:210
3664839994235,4cyclictest0-21swapper/023:20:150
3664839994235,3cyclictest167350irq/118-8000000.ethernet-tx020:15:010
3664839994234,4cyclictest3679429-21grep20:30:300
3664839994230,8cyclictest0-21swapper/020:20:290
366483999422,5cyclictest3697730-21diskstats22:20:170
366483999422,3cyclictest0-21swapper/022:55:220
366483999421,36cyclictest0-21swapper/022:50:020
3664843994130,7cyclictest0-21swapper/221:30:272
3664843994129,7cyclictest0-21swapper/223:15:292
3664843994129,7cyclictest0-21swapper/223:15:292
3664843994128,9cyclictest0-21swapper/223:05:322
3664843994127,8cyclictest0-21swapper/222:55:282
3664843994126,8cyclictest0-21swapper/220:10:292
3664843994124,9cyclictest0-21swapper/221:20:282
366484399411,33cyclictest0-21swapper/219:50:292
3664842994132,4cyclictest3670156-21sendmail19:40:001
3664842994131,6cyclictest3719536-21grep00:25:291
3664842994131,6cyclictest3671734-21grep19:45:281
3664842994125,8cyclictest0-21swapper/122:25:201
3664842994125,11cyclictest231ktimers/123:10:121
3664842994124,12cyclictest231ktimers/119:25:121
3664842994124,12cyclictest231ktimers/119:25:121
3664842994124,11cyclictest231ktimers/100:00:161
3664842994123,13cyclictest231ktimers/100:35:131
3664839994134,4cyclictest167350irq/118-8000000.ethernet-tx019:40:240
3664839994133,5cyclictest3698870-21ps22:25:270
3664839994129,8cyclictest0-21swapper/000:00:010
3664839994121,18cyclictest0-21swapper/021:50:200
366483999411,3cyclictest3699495-21ssh22:30:210
3664843994033,4cyclictest3688825-21cron21:30:002
3664843994028,7cyclictest0-21swapper/221:15:292
3664843994026,7cyclictest0-21swapper/223:45:312
3664843994025,10cyclictest0-21swapper/220:30:302
3664842994034,4cyclictest3665639-21cron19:15:001
3664842994030,5cyclictest0-21swapper/120:20:001
3664842994030,5cyclictest0-21swapper/120:20:001
3664842994024,12cyclictest231ktimers/122:20:121
3664839994034,4cyclictest0-21swapper/000:30:020
3664839994032,4cyclictest167350irq/118-8000000.ethernet-tx019:25:230
3664839994032,4cyclictest167350irq/118-8000000.ethernet-tx019:25:230
366483999401,37cyclictest0-21swapper/022:05:110
366483999401,37cyclictest0-21swapper/019:20:300
3664843993931,4cyclictest0-21swapper/221:40:232
3664843993928,6cyclictest3681130-21unixbench_multi20:40:292
3664843993927,8cyclictest0-21swapper/220:25:282
3664843993924,11cyclictest0-21swapper/219:35:282
366484399391,30cyclictest3700465-21kernelversion22:35:252
366484399391,30cyclictest3700465-21kernelversion22:35:252
3664842993929,6cyclictest3693090-21grep21:50:281
3664839993934,2cyclictest0-21swapper/022:00:230
3664839993932,4cyclictest0-21swapper/021:45:240
3664839993927,8cyclictest0-21swapper/020:45:290
3664839993927,8cyclictest0-21swapper/020:40:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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