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2025-05-05 - 01:24

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 20 highest latencies:
System rackbslot5s.osadl.org (updated Sun May 04, 2025 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1778302996638,25cyclictest1858399-21sh11:00:003
1778302995242,6cyclictest1786848-21grep07:30:273
1778302994840,5cyclictest1870516-21cut11:35:003
1778297994637,5cyclictest1872206-21munin-plugin-st11:40:002
1778293994520,5cyclictest131rcu_preempt09:35:191
1778302994431,9cyclictest391ktimers/309:15:143
1778297994436,5cyclictest1875611-21munin-plugin-st11:50:002
1778302994334,6cyclictest1841384-21fschecks_count10:10:183
1778293994334,6cyclictest1873490-21grep11:40:261
1778288994336,4cyclictest1854602-21munin-plugin-st10:50:000
1778293994234,5cyclictest1782224-21idleruntime-cro07:20:001
1778297994134,4cyclictest1818730-21idleruntime-cro09:05:002
1778293994128,9cyclictest231ktimers/109:50:151
1778297994029,6cyclictest1807634-21grep08:30:262
1778288994032,4cyclictest1837387-21cron10:00:000
1778302993933,4cyclictest1892602-21sendmail12:40:003
1778302993931,5cyclictest1816812-21idleruntime-cro09:00:013
1778302993930,6cyclictest1801761-21fschecks_time08:15:213
1778288993930,5cyclictest0-21swapper/008:15:000
1778302993828,6cyclictest0-21swapper/311:55:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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