Howto:Using the Performance monitor without PUI: Difference between revisions

Howto:Using the Performance monitor without PUI (view source)

765 bytes added , 6 January 2023

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→‎Approach: https://sourceforge.net/p/flightgear/mailman/message/27250036/

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 it would be better to look at the performance monitor stats without using the PUI dialog, e.g. by using the httpd-based property browser or the telnet daemon (--props).
-You will have to manually activate the property browser (if in doubt, refer to menubar.xml for details)
+You will have to manually activate the property browser (if in doubt, refer to menubar.xml for details):
+Use "Debug -> Toggle Subsystem
+Statistics" to enable/disable. It prints min/max/average and
+std-deviation for each of FG's subsystems to the console. The statistics
+interval is configurable via /sim/timing-statistics/interval-s
+Since there are a lot of submodules in FG (most of them are very
+friendly and don't consume much time), you can restrict the output to
+modules exceeding a certain minimum execution time - or a certain jitter
+(hey!). Use /sim/timing-statistics/min-time-ms and
+/sim/timing-statistics/jitter-ms to configure the filters (in
+milliseconds, obviously).
+Should help finding performance and jitter issues if they were caused by
+one of our internal subsystems.<ref>https://sourceforge.net/p/flightgear/mailman/message/27250036/</ref>
 Alternatively, use the property browser, which is more lightweight than the performance monitor dialog.
 == Motivation ==