Performance question
Tim Prince
TimothyPrince@sbcglobal.net
Mon Apr 7 14:35:00 GMT 2008
w1hkj wrote:
> We are porting a real time data acquisition program for amateur radio
> digital signal processing. The program, fldigi, uses the Fast Light
> Tool Kit and and a number of support libraries including PortAudio and
> Sndfile. The source code for this program can be found at
> http://www.w1hkj.com. fldigi is licensed under the GPL.
>
> The port to Windows using Cygwin works very well. There is just one
> issue that needs to be addressed. Several test platforms are used to
> gauge performance, including an
>
> HP notebook, 900 Mhz Athalon, 256 Mg RAM, and
> Dell Dimension 3000, dual processor 3.0 GHz, 1 G RAM.
>
> There is is very significant difference in cpu usage between running the
> application from the Cygwin X-terminal and running from the run command
> (with the cygwin1.dll) from Windows.
>
> System X-term Windows-Run
> HP Athalon 33% 100%
> Dell 3000 3 % 55%
>
>
> We would appreciate any assistance or suggestions on how to improve the
> performance when linking to cygwin1.dll.
>
If you are running single thread, with HT enabled, a 50% performance meter
indication on the Dell is entirely normal. Xterm performance questions
would be appropriate to that mailing list.
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