Re: [Discuss-gnuradio] Pentium IV computing power in FLOPS

[Vincenzo Pellegrini]

Thanks Eric.

very precious info.. 

just by the way.. on March 6th, the Soft-DVB work will be presented in
Karlsruhe at the WSR08 software defined radio conference.

greetings
Vincenzo  



On Sun, 2008-01-20 at 20:19 -0800, Eric Blossom wrote:
> On Mon, Jan 21, 2008 at 01:10:47AM +0100, Vincenzo Pellegrini wrote:
> > Hi everybody,
> > could anybody help me in figuring out what is (even a rough estimate is OK)
> > the raw computing power of a 3.0GHz Pentium IV CPU?
> > 
> > really thanks for help
> > 
> > -- 
> > Vincenzo Pellegrini
> 
> Assuming you're coding in assembler using SSE* instructions, you can
> get a sustained throughput of about 1 FLOP / clock cycle.  Since
> you're not really doing that, I'd call the 3GHz P4 about 0.5 to 1.0 GFLOP.
> 
> YMMV.  Widely ;)
> 
> On the netburst microarchitecture used in the P4 it's really hard to get
> good floating point performance because of the very deep pipeline,
> scarcity of registers, and so-so FPU.
> 
> Eric