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2025-07-01 - 08:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot5s.osadl.org (updated Tue Jul 01, 2025 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4074612995736,18cyclictest4085594-21sendmail19:40:011
4074617995342,7cyclictest4169548-21grep23:40:252
4074620995037,9cyclictest391ktimers/319:20:193
4074612994718,25cyclictest0-21swapper/123:40:171
4074620994533,9cyclictest391ktimers/319:45:143
4074612994536,5cyclictest4141014-21munin-plugin-st22:20:011
4074607994540,3cyclictest0-21swapper/023:45:140
4074612994435,6cyclictest4093864-21unixbench_multi20:00:261
4074607994436,4cyclictest0-21swapper/021:20:010
4074612994318,21cyclictest0-21swapper/119:20:311
4074612994218,20cyclictest0-21swapper/123:00:261
4074612994214,5cyclictest0-21swapper/122:30:001
4074612994214,4cyclictest4175985-21fschecks_time00:00:161
4074612994213,5cyclictest0-21swapper/120:40:001
4074607994236,4cyclictest4181314-21munin-run00:20:010
4074620994130,8cyclictest391ktimers/323:10:133
4074620994128,9cyclictest391ktimers/322:40:153
4074620994126,11cyclictest391ktimers/323:05:173
4074620994126,11cyclictest391ktimers/323:05:163
4074617994133,5cyclictest4085114-21unixbench_multi19:35:322
4074617994131,5cyclictest0-21swapper/222:20:022
4074607994133,5cyclictest4163210-21munin-plugin-st23:25:010
4074617994032,5cyclictest4127166-21idleruntime-cro21:40:002
4074612994029,8cyclictest4188268-21latency_hist00:40:021
4074620993929,6cyclictest4085112-21grep19:35:323
4074607993931,4cyclictest0-21swapper/000:00:000
4074620993829,4cyclictest0-21swapper/321:40:003
4074607993831,3cyclictest0-21swapper/022:45:000
4074620993729,5cyclictest4154646-21cron23:00:003
4074620993727,6cyclictest0-21swapper/323:55:003
4074617993730,4cyclictest4114329-21unixbench_multi21:00:272
4074617993724,9cyclictest311ktimers/223:55:132
4074617993723,10cyclictest311ktimers/222:20:162
4074617993718,6cyclictest4144420-21kworker/u8:2+events_unbound22:37:422
4074612993730,4cyclictest4154660-21munin-plugin-st23:00:001
4074612993729,5cyclictest4168306-21cron23:40:001
4074612993714,4cyclictest4107975-21sh20:45:001
4074620993628,6cyclictest4099303-21kworker/u8:0+events_unbound20:22:513
4074620993627,5cyclictest0-21swapper/320:15:023
4074620993626,6cyclictest0-21swapper/300:25:013
4074617993628,4cyclictest0-21swapper/200:05:012
4074612993627,5cyclictest0-21swapper/119:20:001
4074612993626,6cyclictest0-21swapper/122:35:291
4074612993625,7cyclictest4128453-21grep21:40:261
407461299361,19cyclictest4127157-21sh21:40:011
4074612993611,3cyclictest0-21swapper/100:00:001
4074607993626,7cyclictest4161008-21unixbench_multi23:15:250
4074607993624,9cyclictest121ktimers/020:50:130
4074620993526,5cyclictest0-21swapper/320:40:013
4074617993529,4cyclictest4133948-21kworker/u8:0+events_unbound21:58:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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