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Date: Mon, 07 Apr 2008 07:35:18 -0700
From: Tim Prince <TimothyPrince AT sbcglobal DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: Performance question
References: <47FA2338 DOT 7060202 AT w1hkj DOT com>
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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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