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2026-07-22 - 23:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 20 highest latencies:
System rack9slot4s (updated Wed Jul 22, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
275299911921149,31cyclictest28172-21smartctl07:25:180
275309911401097,27cyclictest10848-21diskstats10:55:151
256302570524,29sleep10-21swapper/107:20:001
265972563516,31sleep00-21swapper/007:20:240
27529992396,229cyclictest0-21swapper/010:55:160
2753099215206,6cyclictest0-21swapper/107:25:181
2441521170,8sleep02752999cyclictest08:40:020
2537921000,3sleep0111rcuc/008:40:250
51482920,5sleep027527-21cyclictest12:05:200
27530994710,6cyclictest22-21ksoftirqd/108:40:271
60022411,12sleep06156-21unixbench_singl10:40:300
2753099417,6cyclictest22-21ksoftirqd/110:45:201
27530994021,4cyclictest22-21ksoftirqd/111:05:001
2753099391,7cyclictest22-21ksoftirqd/109:30:151
2753099386,4cyclictest10412-21taskset08:00:281
2753099384,4cyclictest81rcu_preempt08:20:001
2753099381,7cyclictest22-21ksoftirqd/112:50:101
2753099381,7cyclictest22-21ksoftirqd/112:35:121
2753099381,7cyclictest22-21ksoftirqd/112:15:211
2753099381,7cyclictest22-21ksoftirqd/112:10:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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