Re: [Flightgear-devel] Slow frame rates

[Alan T. <ajt...@v-...>]

At FG start up (with Windows 7) I have very low frame rates (1-3fps) for a 
minute or two. After that the rate increases to about 40.

Using Windows Task Manager I see that the CPU and memory usage are quite low 
during this slow period.

However, switching to Windows Resource Monitor it is immediately apparent 
that there are significant network, disc and page file activity. Resource 
Manager points to MsMpEng.exe as the culprit. This is doing security scans 
on all the AI and Terrasync data that is read at start-up.

If FG is stopped and then restarted, this slow down is not apparent, 
presumably because the AI and Terasync data is up to date.

So in a nutshell, start up frame rates are low due to FG updating volatile 
data such as AI and Terrasync. The virus checker is making this even slower.

Alan

-----Original Message----- 
From: Catherine James
Sent: Saturday, June 16, 2012 5:02 AM
To: fli...@li...
Subject: [Flightgear-devel] Slow frame rates


Additional finding:  if you do a File --> Reset immediately after startup, 
the slow 1 - 2 fps problem goes away immediately and frame rates stay high 
thereafter.

Something seems to be getting initialized either when breaking ground during 
takeoff or in a File --> Reset that is not getting initialized on initial 
startup.

Cathy


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