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Re: [Discuss-gnuradio] Segmentation fault

From: Ben Loftin
Subject: Re: [Discuss-gnuradio] Segmentation fault
Date: Mon, 04 Apr 2005 13:32:15 -0600
User-agent: Mozilla Thunderbird 0.7.2 (Windows/20040707)

I'm using an Athlon XP 2400. Just wondering if it would matter if I built fftw with --enable-3dnow, below was taken from fftw faq. Which brings me to 2nd question. Is there some standard benchmarking code someone has or on cvs?

   Question 2.5. What's the difference between |--enable-3dnow| and

|--enable-k7| enables 3DNow! instructions on K7 processors (AMD Athlon and its variants). K7 support is provided by assembly routines generated by a special purpose compiler.

|--enable-3dnow| enables generic 3DNow! support using |gcc| builtin functions. This works on earlier AMD processors, but it is not as fast as our special assembly routines.


Eric Blossom wrote:

On Sun, Apr 03, 2005 at 11:44:21PM -0700, Sachi wrote:
Hi, Eric

Toby's suggestion helped me solve the problem. If I
configure "without" the --enable-sse option, then
everything works well. Is --enable-sse option
necessary here?

It's only necessary if you want it to go fast...
[For most current uses within GNU Radio it won't matter]

If you're on an Athlon, use --enable-3dnow instead.

Thanks to you guys



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