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2026-07-17 - 23:14

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
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.

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 rackbslot5s.osadl.org (updated Fri Jul 17, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
657489995442,5cyclictest702595-21kworker/u8:0+events_unbound09:34:373
657489995245,5cyclictest725107-21kworker/u8:2+events_unbound10:29:483
657480995041,5cyclictest723469-21munin-plugin-st10:20:001
657476995038,9cyclictest121ktimers/007:55:140
657476995022,4cyclictest0-21swapper/012:00:240
657480994940,5cyclictest730276-21cron10:40:001
657489994832,5cyclictest131rcu_preempt11:00:223
657476994736,7cyclictest666526-21grep07:30:270
657480994635,7cyclictest754124-21grep11:45:261
657476994617,6cyclictest747085-21grep11:25:250
657476994617,6cyclictest747085-21grep11:25:250
657480994535,7cyclictest675492-21sendmail08:00:001
657489994436,6cyclictest664356-21kworker/u8:1+events_unbound07:29:093
657489994337,4cyclictest723362-21kworker/u8:1+events_unbound10:19:473
657489994336,5cyclictest664356-21kworker/u8:1+events_unbound07:39:103
657489994334,7cyclictest671792-21kworker/u8:2+events_unbound08:04:153
657489994236,4cyclictest706637-21kworker/u8:1+events_unbound09:39:393
657489994229,9cyclictest391ktimers/307:30:133
657476994234,4cyclictest663358-21munin-plugin-st07:25:000
657476994232,7cyclictest690379-21unixbench_multi08:40:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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