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2026-04-26 - 02:56

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 50 highest latencies:
System rackeslot6s.osadl.org (updated Sat Apr 25, 2026 12:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
280284799801,2cyclictest0-21swapper/112:30:011
280284299711,61cyclictest0-21swapper/011:30:120
2802848995936,15cyclictest311ktimers/210:00:142
2802848995920,14cyclictest2816945-21rm08:30:012
2802847995317,6cyclictest2806464-21apt-get07:30:021
2802847995310,19cyclictest2841065-21/usr/sbin/munin10:50:191
280284299521,49cyclictest0-21swapper/009:15:010
2802848995125,19cyclictest311ktimers/208:05:152
2802842995141,6cyclictest2826334-21apt09:25:000
2802842995134,14cyclictest167350irq/118-8000000.ethernet-tx007:10:340
2802848995011,11cyclictest30-21rcuc/208:00:032
2802842995041,4cyclictest167350irq/118-8000000.ethernet-tx009:00:190
280284799495,9cyclictest2819659-21gpg-connect-age08:45:011
2802842994942,4cyclictest167350irq/118-8000000.ethernet-tx012:25:250
2802842994940,5cyclictest2830728-21munin-plugin-st09:50:000
2802842994935,10cyclictest0-21swapper/012:10:010
2802847994839,4cyclictest2815091-21sendmail08:20:001
2802847994828,15cyclictest0-21swapper/108:40:011
2802847994827,15cyclictest231ktimers/109:40:131
280284899475,6cyclictest2819493-21apt-get08:45:002
2802848994730,11cyclictest311ktimers/212:15:152
2802848994730,11cyclictest311ktimers/212:15:152
2802847994712,14cyclictest2845924-21apt-get11:20:011
280284299471,42cyclictest2853131-21dropbear12:00:190
2802848994610,8cyclictest2829798-21apt-get09:45:012
2802847994636,7cyclictest2857008-21munin-plugin-st12:25:001
2802842994639,4cyclictest20650irq/252-8000000.ethernet09:40:260
2802842994639,4cyclictest19750irq/27-20000000.i2c08:20:230
2802842994639,4cyclictest167350irq/118-8000000.ethernet-tx011:50:240
2802842994618,26cyclictest0-21swapper/007:20:210
280284299461,43cyclictest0-21swapper/008:35:120
280284299461,10cyclictest0-21swapper/008:50:010
2802847994532,8cyclictest2843296-21unixbench_multi11:00:291
2802847994530,8cyclictest0-21swapper/107:20:291
2802847994528,11cyclictest0-21swapper/112:00:261
280284299451,41cyclictest0-21swapper/008:00:050
2802848994432,7cyclictest0-21swapper/210:05:272
2802848994429,10cyclictest311ktimers/209:45:102
2802847994432,7cyclictest0-21swapper/110:00:281
2802842994438,3cyclictest167350irq/118-8000000.ethernet-tx010:15:150
2802848994334,6cyclictest2822848-21grep09:00:282
2802848994334,5cyclictest2836583-21grep10:20:282
2802848994333,7cyclictest311ktimers/210:50:222
2802848994330,8cyclictest0-21swapper/211:45:282
2802848994325,11cyclictest311ktimers/211:25:112
2802847994331,6cyclictest2822017-21grep08:55:291
2802842994336,4cyclictest167350irq/118-8000000.ethernet-tx012:10:230
2802842994336,4cyclictest167350irq/118-8000000.ethernet-tx007:25:240
2802842994333,7cyclictest0-21swapper/011:50:000
280284299432,4cyclictest2850219-21users11:40:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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