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2026-08-12 - 00:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
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 rack7slot7s.osadl.org (updated Tue Aug 11, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2183129581,9sleep00-21swapper/007:09:100
2188629364,10sleep30-21swapper/307:09:553
2169229267,9sleep20-21swapper/207:07:242
2181228265,13sleep10-21swapper/107:08:561
272482500,0sleep00-21swapper/011:32:370
171992310,0sleep00-21swapper/009:30:190
2198899290,1cyclictest0-21swapper/309:12:383
2198499280,24cyclictest0-21swapper/209:44:062
2198899250,2cyclictest0-21swapper/311:49:423
2198899240,0cyclictest0-21swapper/309:42:313
2198499240,23cyclictest0-21swapper/212:10:292
2198899231,0cyclictest0-21swapper/310:43:443
2198899230,4cyclictest0-21swapper/311:44:593
2198899230,1cyclictest0-21swapper/309:28:293
2198299230,3cyclictest0-21swapper/110:08:281
2198899220,1cyclictest0-21swapper/311:32:583
21982992220,1cyclictest103522chrt12:00:541
21978992218,3cyclictest13-21ksoftirqd/011:54:590
21978992217,2cyclictest141rcu_preempt12:00:290
21978992216,2cyclictest13-21ksoftirqd/010:33:120
21988992119,1cyclictest0-21swapper/311:10:143
2198899211,4cyclictest0-21swapper/311:28:103
2198899210,3cyclictest0-21swapper/309:32:423
2198899210,1cyclictest0-21swapper/309:16:353
2198499210,21cyclictest0-21swapper/209:33:222
21978992117,3cyclictest13-21ksoftirqd/010:40:140
21978992116,3cyclictest13-21ksoftirqd/010:51:080
2198899200,18cyclictest0-21swapper/312:33:333
2198499200,19cyclictest0-21swapper/209:13:302
2198299200,1cyclictest0-21swapper/109:37:241
2198299200,19cyclictest0-21swapper/112:05:171
2197899202,1cyclictest141rcu_preempt11:15:160
21988991917,1cyclictest2065-21taskset11:17:333
21982991918,1cyclictest0-21swapper/112:24:161
21982991917,1cyclictest23169-21taskset10:31:471
21982991915,4cyclictest0-21swapper/111:29:471
21978991912,2cyclictest13-21ksoftirqd/012:29:510
2197899190,1cyclictest141rcu_preempt10:22:250
2198899181,13cyclictest0-21swapper/310:00:153
2198499186,1cyclictest0-21swapper/212:15:312
2198499180,0cyclictest0-21swapper/210:42:102
21982991816,1cyclictest138422chrt09:47:511
21988991715,1cyclictest8593-21apt-get10:23:473
2198899170,1cyclictest0-21swapper/309:54:363
21984991717,0cyclictest0-21swapper/210:49:372
2198499170,14cyclictest0-21swapper/211:09:172
21982991715,1cyclictest50132chrt11:39:031
2198299170,16cyclictest0-21swapper/108:50:121
21978991714,2cyclictest13-21ksoftirqd/011:25:190
21982991615,1cyclictest0-21swapper/111:10:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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