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2026-08-29 - 05:50

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 Sat Aug 29, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
259003997327,38cyclictest0-21swapper/021:35:290
259003997327,38cyclictest0-21swapper/021:35:290
25900399732,33cyclictest288348-21latency_hist22:00:010
25900799721,29cyclictest0-21swapper/200:20:182
259007997133,6cyclictest0-21swapper/200:15:002
259003997129,37cyclictest0-21swapper/000:20:270
25900399702,5cyclictest315193-21cut00:35:190
259003996828,5cyclictest0-21swapper/023:20:300
25900399681,63cyclictest302098-21apt-key23:20:000
259005996647,13cyclictest296843-21gpgv22:50:011
259003996627,8cyclictest0-21swapper/021:50:290
259003996627,8cyclictest0-21swapper/021:50:280
259003996627,6cyclictest0-21swapper/019:30:300
25900799651,37cyclictest0-21swapper/220:35:182
259007996449,5cyclictest0-21swapper/222:00:002
259003996428,7cyclictest0-21swapper/019:50:280
259003996428,7cyclictest0-21swapper/019:50:280
259003996428,32cyclictest0-21swapper/000:05:290
259003996427,33cyclictest0-21swapper/000:25:280
259003996426,8cyclictest0-21swapper/023:50:280
25900399638,26cyclictest0-21swapper/020:25:010
259003996224,7cyclictest0-21swapper/000:00:300
25900399621,6cyclictest275772-21tune2fs20:45:180
25900399611,4cyclictest262160-21sh19:25:190
259007996043,13cyclictest0-21swapper/222:20:022
259003996024,31cyclictest19750irq/27-20000000.i2c23:00:010
259003996023,8cyclictest0-21swapper/023:05:290
259003996013,3cyclictest0-21swapper/000:35:010
259003995924,6cyclictest0-21swapper/020:25:290
259007995741,13cyclictest32-21ksoftirqd/220:50:192
25900399576,4cyclictest0-21swapper/023:30:010
259003995731,4cyclictest20850irq/208-8000000.ethernet00:10:260
259003995725,6cyclictest0-21swapper/019:20:280
259003995724,8cyclictest0-21swapper/022:45:310
25900799559,25cyclictest258997-21cyclictest23:35:132
25900799551,35cyclictest0-21swapper/221:00:182
259003995412,35cyclictest0-21swapper/019:10:000
259007995344,6cyclictest301996-21sendmail23:20:002
259003995242,7cyclictest299463-21munin-plugin-st23:04:590
25900399513,5cyclictest259904-21munin-node19:15:010
259005994937,8cyclictest284829-21sendmail21:40:001
259005994937,8cyclictest284829-21sendmail21:40:001
25900399496,6cyclictest0-21swapper/021:35:000
259007994841,4cyclictest32-21ksoftirqd/222:05:192
259003994828,15cyclictest0-21swapper/019:45:270
25900399481,8cyclictest265237-21munin-run19:45:000
259005994734,8cyclictest294182-21grep22:30:291
259003994733,9cyclictest0-21swapper/021:10:270
25900399471,39cyclictest294382-21latency_hist22:35:000
25900799462,13cyclictest0-21swapper/223:15:012
259003994638,4cyclictest20850irq/208-8000000.ethernet20:40:010
259003994637,7cyclictest295137-21sendmail22:40:010
259003994539,3cyclictest20650irq/252-8000000.ethernet20:50:240
259003994538,4cyclictest277997-21http21:00:010
259007994422,13cyclictest258997-21cyclictest00:05:012
259005994436,5cyclictest275459-21munin-plugin-st20:45:001
259005994436,5cyclictest275459-21munin-plugin-st20:45:001
259005994432,8cyclictest0-21swapper/121:59:591
259005994428,9cyclictest272732-21grep20:25:301
259003994432,8cyclictest0-21swapper/023:55:280
259003994431,8cyclictest0-21swapper/022:40:280
259007994320,11cyclictest0-21swapper/220:05:092
259005994331,7cyclictest0-21swapper/120:05:261
259005994329,10cyclictest0-21swapper/123:20:011
259003994330,8cyclictest0-21swapper/022:25:290
25900399431,35cyclictest0-21swapper/021:50:010
25900799428,20cyclictest0-21swapper/222:40:012
25900799427,30cyclictest0-21swapper/223:30:182
25900799427,30cyclictest0-21swapper/223:30:182
259007994223,11cyclictest0-21swapper/219:55:122
259007994217,14cyclictest0-21swapper/219:15:112
259007994121,12cyclictest0-21swapper/220:00:262
259007994118,11cyclictest0-21swapper/222:10:122
259005994134,4cyclictest0-21swapper/119:35:261
25900599413,2cyclictest0-21swapper/119:15:011
25900599413,11cyclictest0-21swapper/119:50:021
259005994126,10cyclictest0-21swapper/121:10:271
259003994129,8cyclictest0-21swapper/019:35:280
259003994128,9cyclictest0-21swapper/021:40:280
25900399412,4cyclictest311856-21meminfo00:15:250
25900399412,3cyclictest291675-21apt22:20:000
25900399411,4cyclictest297763-21munin-run22:55:000
25900399411,11cyclictest0-21swapper/022:10:010
259007994031,5cyclictest0-21swapper/222:45:302
259007994027,9cyclictest0-21swapper/221:50:272
259007994027,9cyclictest0-21swapper/221:50:272
259007994021,13cyclictest0-21swapper/219:20:152
259007994021,12cyclictest277773-21/usr/sbin/munin20:55:302
259007994013,19cyclictest0-21swapper/219:25:262
259005994027,8cyclictest0-21swapper/123:00:001
259003994032,4cyclictest269417-21unixbench_singl20:05:270
259003994030,6cyclictest0-21swapper/021:00:270
259003994028,8cyclictest0-21swapper/021:15:290
259003994028,7cyclictest0-21swapper/019:15:280
259003994027,8cyclictest0-21swapper/019:55:290
259003994019,19cyclictest0-21swapper/021:05:260
259007993926,8cyclictest0-21swapper/200:35:012
259007993920,6cyclictest0-21swapper/221:45:102
259007993919,14cyclictest0-21swapper/200:35:112
259007993919,13cyclictest0-21swapper/219:35:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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