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2026-04-03 - 17:22

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 Apr 03, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
92456998040,21cyclictest0-21swapper/209:30:012
9245699797,53cyclictest0-21swapper/211:05:012
92454996718,40cyclictest0-21swapper/112:30:271
92454996521,36cyclictest0-21swapper/108:25:001
92456996434,15cyclictest92447-21cyclictest09:15:012
92454996424,35cyclictest98137-21/usr/sbin/munin07:40:151
92454996332,25cyclictest0-21swapper/110:40:271
92454996125,30cyclictest0-21swapper/109:15:271
92454996119,33cyclictest0-21swapper/107:50:251
92454995925,27cyclictest0-21swapper/108:00:201
92454995720,32cyclictest0-21swapper/112:00:281
92454995720,32cyclictest0-21swapper/112:00:281
9245499571,49cyclictest0-21swapper/109:40:211
92454995622,27cyclictest0-21swapper/109:10:191
92454995621,29cyclictest0-21swapper/107:30:221
92454995617,5cyclictest0-21swapper/108:35:251
92454995615,32cyclictest0-21swapper/108:30:191
92454995614,5cyclictest0-21swapper/111:05:271
92454995516,6cyclictest0-21swapper/111:20:281
92454995516,6cyclictest0-21swapper/111:20:281
9245299551,16cyclictest0-21swapper/011:20:010
92454995418,29cyclictest0-21swapper/112:15:271
92454995417,4cyclictest0-21swapper/109:05:251
92454995414,32cyclictest0-21swapper/110:10:301
92454995339,9cyclictest116713-21apt-key09:30:011
92454995320,7cyclictest139027-21/usr/sbin/munin11:40:291
92454995318,4cyclictest0-21swapper/112:35:211
92454995314,4cyclictest0-21swapper/107:15:161
92454995314,4cyclictest0-21swapper/107:15:161
92454995238,10cyclictest128683-21sendmail10:40:001
92454995225,21cyclictest125304-21sh10:20:011
92454995216,4cyclictest0-21swapper/112:00:001
92454995216,4cyclictest0-21swapper/111:15:011
92456995137,9cyclictest0-21swapper/212:25:002
92454995120,27cyclictest112631-21latency_hist09:05:011
92454995118,3cyclictest0-21swapper/109:35:271
92454995115,5cyclictest0-21swapper/108:45:021
9245499511,2cyclictest0-21swapper/111:05:011
92456995041,5cyclictest128685-21munin-plugin-st10:39:592
9245499505,12cyclictest0-21swapper/112:25:271
9245499505,12cyclictest0-21swapper/112:25:271
92454995023,21cyclictest0-21swapper/111:00:011
92454995019,26cyclictest0-21swapper/110:25:201
92454995019,26cyclictest0-21swapper/110:25:201
92454995016,3cyclictest0-21swapper/108:10:281
92454995015,6cyclictest0-21swapper/107:45:241
92454995011,6cyclictest0-21swapper/107:10:211
92452995039,4cyclictest120041-21grep09:45:280
92456994914,28cyclictest103614-21ptp4l-jitter08:10:282
92456994913,28cyclictest108644-21kernelversion08:40:232
9245499492,13cyclictest130334-21unixbench_singl10:45:281
92454994915,3cyclictest0-21swapper/109:45:251
92456994837,7cyclictest105536-21munin-plugin-st08:24:592
9245499485,11cyclictest0-21swapper/112:10:281
92454994834,9cyclictest0-21swapper/110:25:001
92454994814,4cyclictest0-21swapper/111:15:141
92454994812,8cyclictest0-21swapper/108:10:021
92452994840,4cyclictest167350irq/118-8000000.ethernet-tx009:25:230
92452994836,9cyclictest97926-21sendmail07:40:010
92456994732,10cyclictest118451-21sh09:40:002
92454994720,23cyclictest141339-21cron11:55:011
92454994715,3cyclictest117743-21latency_hist09:35:021
92454994714,5cyclictest0-21swapper/111:45:161
92454994713,7cyclictest0-21swapper/110:05:291
92454994713,5cyclictest0-21swapper/111:25:271
92454994712,31cyclictest0-21swapper/108:50:281
92452994739,4cyclictest104443-21ptp4l08:15:250
92452994739,4cyclictest104443-21ptp4l08:15:250
92452994730,14cyclictest167350irq/118-8000000.ethernet-tx012:30:210
9245299471,14cyclictest0-21swapper/007:35:010
92456994640,4cyclictest311ktimers/211:55:012
92454994617,25cyclictest0-21swapper/107:10:011
92452994636,5cyclictest0-21swapper/008:00:270
92452994635,8cyclictest108634-21kernelversion08:40:220
9245499452,5cyclictest109451-21grep08:45:191
92454994513,5cyclictest0-21swapper/108:55:261
92454994511,8cyclictest0-21swapper/108:20:011
92454994511,8cyclictest0-21swapper/108:20:011
92452994537,4cyclictest167350irq/118-8000000.ethernet-tx008:30:040
92452994537,4cyclictest167350irq/118-8000000.ethernet-tx007:55:270
92452994536,4cyclictest167350irq/118-8000000.ethernet-tx007:25:010
9245299452,5cyclictest149032-21munin-run12:40:000
9245299451,38cyclictest0-21swapper/010:15:000
92454994416,4cyclictest0-21swapper/110:35:001
9245499441,3cyclictest0-21swapper/107:58:421
9245299449,33cyclictest0-21swapper/009:50:160
92452994435,5cyclictest0-21swapper/008:50:170
92452994431,9cyclictest0-21swapper/011:25:200
9245299442,3cyclictest115307-21grep09:20:170
92456994336,4cyclictest143881-21munin-plugin-st12:10:002
92456994331,8cyclictest0-21swapper/209:30:282
92454994328,9cyclictest0-21swapper/109:50:291
92454994317,6cyclictest231ktimers/112:20:231
92452994336,4cyclictest167350irq/118-8000000.ethernet-tx007:40:300
92452994335,5cyclictest167350irq/118-8000000.ethernet-tx011:50:230
92452994333,5cyclictest0-21swapper/009:55:280
9245299431,4cyclictest138242-21diskstats11:35:180
9245299431,39cyclictest0-21swapper/011:10:120
9245299431,37cyclictest0-21swapper/008:45:010
92456994235,4cyclictest167550irq/134-8000000.ethernet-tx208:00:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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