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2026-07-20 - 17:30

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 Jul 20, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3233401995746,8cyclictest0-21swapper/007:25:010
3233405995443,6cyclictest3269466-21run-parts10:40:002
3233405995438,12cyclictest311ktimers/207:55:012
3233402995436,13cyclictest231ktimers/110:05:151
323340199546,35cyclictest15-21rcuc/011:45:010
3233401995436,13cyclictest0-21swapper/009:55:000
3233402995342,6cyclictest3282935-21grep11:55:301
3233402995341,8cyclictest0-21swapper/109:04:591
3233405995245,4cyclictest3287383-21munin-plugin-st12:25:002
3233405995245,4cyclictest3287383-21munin-plugin-st12:25:002
3233401995244,4cyclictest167350irq/118-8000000.ethernet-tx008:40:190
3233402995136,10cyclictest231ktimers/112:00:111
3233401995043,4cyclictest167350irq/118-8000000.ethernet-tx011:05:000
3233401995041,5cyclictest0-21swapper/010:40:140
3233401994839,6cyclictest3277998-21munin-plugin-st11:30:000
3233401994839,6cyclictest3277998-21munin-plugin-st11:30:000
323340599474,7cyclictest14-21rcu_preempt09:40:012
3233405994735,8cyclictest0-21swapper/208:04:592
3233402994740,3cyclictest3243124-21munin-plugin-st08:05:001
3233401994738,5cyclictest0-21swapper/010:45:200
3233401994735,10cyclictest3249026-21munin-plugin-st08:40:000
3233405994638,4cyclictest0-21swapper/208:10:222
3233402994636,6cyclictest3266846-21grep10:20:281
3233402994634,8cyclictest3282168-21grep11:50:291
3233401994639,4cyclictest167350irq/118-8000000.ethernet-tx011:30:190
3233401994636,6cyclictest0-21swapper/010:00:000
3233401994633,10cyclictest3255955-21munin-plugin-st09:20:000
3233405994535,5cyclictest0-21swapper/207:25:022
3233405994533,8cyclictest0-21swapper/208:54:592
3233402994534,6cyclictest3248076-21grep08:30:291
3233401994538,4cyclictest20650irq/252-8000000.ethernet11:15:010
3233401994538,4cyclictest20650irq/252-8000000.ethernet10:20:190
3233401994538,4cyclictest20650irq/252-8000000.ethernet07:40:170
3233405994436,4cyclictest3239649-21cron07:45:002
3233405994429,10cyclictest0-21swapper/208:55:272
3233405994429,10cyclictest0-21swapper/208:55:272
3233402994434,6cyclictest3268559-21grep10:30:291
3233402994434,6cyclictest3268559-21grep10:30:281
3233402994433,7cyclictest3240459-21grep07:45:291
323340299443,34cyclictest3250092-21cat08:45:021
3233402994431,9cyclictest0-21swapper/111:25:281
3233402994431,9cyclictest0-21swapper/111:25:281
3233402994423,8cyclictest0-21swapper/110:50:201
3233401994437,4cyclictest3285678-21latency_hist12:15:010
3233401994436,4cyclictest0-21swapper/008:20:290
3233401994433,8cyclictest3253287-21grep09:00:290
3233401994433,6cyclictest0-21swapper/008:25:280
323340199442,39cyclictest3256697-21sed09:20:290
323340199441,41cyclictest0-21swapper/010:15:150
3233405994335,4cyclictest0-21swapper/212:40:002
3233405994329,8cyclictest0-21swapper/209:00:292
3233401994336,4cyclictest20650irq/252-8000000.ethernet07:55:180
3233401994335,4cyclictest20650irq/252-8000000.ethernet11:20:190
3233401994334,6cyclictest0-21swapper/011:50:000
323340199431,40cyclictest0-21swapper/008:45:220
3233405994232,7cyclictest3272840-21sendmail11:00:002
3233405994230,8cyclictest0-21swapper/211:30:312
3233405994230,7cyclictest3288149-21grep12:25:292
3233405994228,8cyclictest0-21swapper/210:30:292
3233405994228,8cyclictest0-21swapper/210:30:292
3233402994234,5cyclictest3242186-21sendmail08:00:001
3233402994232,6cyclictest3273600-21grep11:00:291
3233402994231,8cyclictest0-21swapper/109:10:291
3233402994231,7cyclictest3289690-21grep12:35:271
3233402994227,8cyclictest0-21swapper/109:25:291
3233402994224,8cyclictest0-21swapper/108:35:271
3233402994221,13cyclictest0-21swapper/107:15:231
3233401994237,2cyclictest0-21swapper/010:35:270
3233401994235,4cyclictest20650irq/252-8000000.ethernet11:55:200
3233401994235,4cyclictest20650irq/252-8000000.ethernet10:55:190
3233401994235,4cyclictest20650irq/252-8000000.ethernet10:10:000
3233401994235,4cyclictest20650irq/252-8000000.ethernet09:40:230
3233401994234,4cyclictest3287299-21unixbench_multi12:20:280
3233401994234,4cyclictest3287299-21unixbench_multi12:20:280
3233401994234,4cyclictest20650irq/252-8000000.ethernet12:00:270
3233401994229,9cyclictest0-21swapper/011:40:000
3233401994229,9cyclictest0-21swapper/008:55:000
3233401994229,8cyclictest131ktimers/011:05:120
3233401994228,8cyclictest0-21swapper/012:15:290
323340199422,4cyclictest3237100-21sshd07:28:000
323340199421,39cyclictest0-21swapper/010:00:270
323340199421,37cyclictest3282224-21sort11:55:010
3233405994134,4cyclictest3240442-21unixbench_singl07:45:292
3233405994129,8cyclictest0-21swapper/209:10:292
3233405994128,9cyclictest0-21swapper/211:05:002
3233405994125,9cyclictest0-21swapper/211:15:232
3233402994132,5cyclictest3284670-21grep12:05:301
3233402994131,6cyclictest3280425-21grep11:40:281
3233402994130,5cyclictest0-21swapper/108:10:221
3233402994129,7cyclictest0-21swapper/110:45:291
3233401994135,3cyclictest3255111-21munin-plugin-st09:14:590
3233401994134,4cyclictest20650irq/252-8000000.ethernet11:15:280
3233401994134,4cyclictest20650irq/252-8000000.ethernet10:10:240
3233401994134,4cyclictest20650irq/252-8000000.ethernet09:30:220
3233401994134,4cyclictest20650irq/252-8000000.ethernet09:05:170
3233401994134,4cyclictest20650irq/252-8000000.ethernet09:05:170
3233401994134,4cyclictest20650irq/252-8000000.ethernet07:30:290
3233401994134,4cyclictest20650irq/252-8000000.ethernet07:15:310
3233401994133,4cyclictest20650irq/252-8000000.ethernet08:30:160
323340199412,5cyclictest3260688-21meminfo09:45:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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