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2024-02-23 - 17:36

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack7slot3s.osadl.org (updated Fri Feb 23, 2024 00:43:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
996821680,5sleep11821299cyclictest23:41:401
82792920,2sleep10-21swapper/122:54:551
157622840,3sleep30-21swapper/321:37:123
89982830,3sleep11821299cyclictest00:25:481
235132810,2sleep20-21swapper/219:26:462
237572790,1sleep30-21swapper/323:59:103
145092780,4sleep231-21ksoftirqd/222:18:532
18211997628,12cyclictest0-21swapper/021:27:040
1821199722,36cyclictest0-21swapper/020:42:060
1821399703,54cyclictest14475-21/usr/sbin/munin00:32:392
1821399701,51cyclictest26176-21/usr/sbin/munin19:32:172
1821399701,51cyclictest26176-21/usr/sbin/munin19:32:172
1821399701,46cyclictest31110-21/usr/sbin/munin22:42:092
18211996927,3cyclictest0-21swapper/023:07:070
1821199686,26cyclictest8050irq/56-dwc_otg_21:32:060
1821199682,48cyclictest26637-21sed19:32:230
1821199682,48cyclictest26637-21sed19:32:230
1821399671,42cyclictest19267-21date00:41:462
1821299675,43cyclictest0-21swapper/119:37:051
18212996724,12cyclictest7950irq/56-dwc_otg22:57:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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