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2026-06-22 - 11:34

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 Jun 22, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
323350599648,18cyclictest3239873-21/usr/sbin/munin19:45:201
3233502996254,5cyclictest0-21swapper/022:45:120
323350599576,19cyclictest22-21rcuc/123:25:021
323350299554,5cyclictest3267034-21apt-config22:25:000
3233506995314,30cyclictest0-21swapper/219:40:252
3233505995140,8cyclictest3242203-21sendmail20:00:001
3233505995041,5cyclictest3266104-21apt22:20:001
3233505995041,5cyclictest3266104-21apt22:20:001
3233502995033,15cyclictest131ktimers/020:15:280
3233505994933,11cyclictest0-21swapper/123:20:001
3233502994944,3cyclictest0-21swapper/021:30:250
3233502994941,5cyclictest3269572-21latency_hist22:40:000
3233502994930,16cyclictest3284869-21grep00:05:320
3233502994841,4cyclictest167350irq/118-8000000.ethernet-tx023:14:590
3233502994838,7cyclictest131ktimers/020:55:280
323350299483,43cyclictest0-21swapper/023:00:220
3233506994739,4cyclictest0-21swapper/220:50:002
3233506994737,6cyclictest3262729-21run-parts21:59:592
3233505994740,4cyclictest3237135-21munin-plugin-st19:29:591
3233505994737,7cyclictest3262728-21munin-plugin-st22:00:001
3233502994739,5cyclictest3249809-21munin-plugin-st20:45:010
3233502994739,5cyclictest3249809-21munin-plugin-st20:45:010
3233505994620,23cyclictest22-21rcuc/119:20:011
3233502994639,4cyclictest3287492-21munin-plugin-st00:25:000
3233502994638,4cyclictest0-21swapper/020:35:110
323350299461,5cyclictest3286078-21fschecks_count00:15:180
323350299461,39cyclictest3281727-21cat23:50:010
323350299461,39cyclictest3281727-21cat23:50:010
3233506994530,9cyclictest0-21swapper/221:20:292
3233505994533,8cyclictest0-21swapper/119:15:001
323350299455,6cyclictest19750irq/27-20000000.i2c00:35:000
3233502994539,4cyclictest3279884-21latency_hist23:40:010
3233505994434,5cyclictest0-21swapper/100:25:291
3233505994433,7cyclictest0-21swapper/120:05:291
323350299444,9cyclictest0-21swapper/022:20:010
323350299444,9cyclictest0-21swapper/022:20:010
3233502994435,7cyclictest3276507-21munin-plugin-st23:20:000
3233506994334,6cyclictest3251574-21munin-plugin-st20:55:002
3233506994331,8cyclictest0-21swapper/220:30:302
3233505994337,4cyclictest3245580-21sendmail20:20:011
3233505994328,10cyclictest0-21swapper/121:45:261
3233502994337,4cyclictest20850irq/208-8000000.ethernet23:55:210
323350299432,5cyclictest3268163-21diskstats22:30:200
323350299432,5cyclictest3268163-21diskstats22:30:190
323350299432,38cyclictest0-21swapper/022:40:290
3233502994314,26cyclictest0-21swapper/019:20:010
3233506994231,7cyclictest3285709-21grep00:10:292
3233506994230,6cyclictest3258459-21grep21:30:282
3233506994228,9cyclictest0-21swapper/223:55:292
3233506994225,14cyclictest311ktimers/221:10:122
3233505994227,8cyclictest0-21swapper/123:30:281
3233505994210,26cyclictest0-21swapper/122:35:291
3233502994224,15cyclictest0-21swapper/019:35:010
323350299421,3cyclictest0-21swapper/000:40:000
3233502994210,28cyclictest3243838-21unixbench_singl20:05:290
3233506994130,6cyclictest0-21swapper/222:50:302
3233506994129,7cyclictest0-21swapper/219:45:292
3233506994124,13cyclictest311ktimers/222:05:102
3233505994134,4cyclictest3275662-21munin-plugin-st23:15:001
3233505994133,4cyclictest0-21swapper/122:50:291
3233505994130,7cyclictest0-21swapper/123:55:291
3233505994129,5cyclictest0-21swapper/100:35:291
3233502994128,9cyclictest0-21swapper/020:55:010
323350299412,4cyclictest3287764-21diskstats00:25:190
323350299411,6cyclictest15-21rcuc/021:15:010
323350299411,5cyclictest3282076-21meminfo23:50:240
323350299411,4cyclictest3274732-21munin-run23:10:000
323350299411,4cyclictest3253952-21memory21:05:260
3233505994028,9cyclictest3284311-21/usr/sbin/munin00:05:211
3233505994028,9cyclictest0-21swapper/119:30:281
3233505994028,8cyclictest0-21swapper/120:00:281
3233505994028,8cyclictest0-21swapper/120:00:281
3233505994022,13cyclictest3269787-21/usr/sbin/munin22:40:181
3233502994034,4cyclictest0-21swapper/022:25:220
3233502994034,2cyclictest0-21swapper/021:25:020
3233502994033,4cyclictest0-21swapper/000:00:310
3233502994033,3cyclictest0-21swapper/020:05:020
3233502994033,3cyclictest0-21swapper/020:05:010
3233502994022,16cyclictest0-21swapper/020:25:160
323350299401,9cyclictest0-21swapper/022:05:010
323350299401,37cyclictest0-21swapper/022:05:240
323350299401,2cyclictest0-21swapper/023:30:010
3233506993930,5cyclictest0-21swapper/223:55:002
3233506993929,6cyclictest0-21swapper/222:00:282
3233506993928,8cyclictest3253365-21http21:05:022
3233506993928,7cyclictest0-21swapper/223:40:292
3233506993928,5cyclictest0-21swapper/221:20:012
3233506993920,14cyclictest311ktimers/221:50:152
3233506993920,14cyclictest311ktimers/221:50:142
3233506993920,13cyclictest311ktimers/200:20:122
3233505993930,6cyclictest3287376-21grep00:20:271
3233505993929,7cyclictest0-21swapper/120:10:281
3233505993927,8cyclictest0-21swapper/120:40:271
3233505993927,8cyclictest0-21swapper/120:40:271
3233505993926,8cyclictest3264921-21sshd22:10:241
3233505993925,10cyclictest0-21swapper/120:45:251
3233502993932,4cyclictest0-21swapper/021:15:160
3233502993930,5cyclictest0-21swapper/022:55:280
323350299391,36cyclictest0-21swapper/022:50:160
323350299391,33cyclictest0-21swapper/000:10:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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