[ptx] x64 benchmarks

[Michael Galloway]

and for enblend:

32bit:
model name      : Intel(R) Pentium(R) 4 CPU 2.40GHz
stepping        : 4
cpu MHz         : 2386.844

time enblend -o 32b.tif test10000.tif test10001.tif test10002.tif test10003.tif test10004.tif test10005.tif test10006.tif

Checkpointing...

real    0m58.856s
user    0m26.430s
sys     0m2.472s

64bit:
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 5
model name      : AMD Opteron(tm) Processor 242
stepping        : 10
cpu MHz         : 1594.190

time enblend -o 64b.tif test10000.tif test10001.tif test10002.tif test10003.tif test10004.tif test10005.tif test10006.tif

Checkpointing...

real    0m38.970s
user    0m35.021s
sys     0m0.795s



On Tue, Jan 17, 2006 at 09:27:08AM +0100, Pablo d'Angelo wrote:
> Marek Januszewski schrieb:
> > Hello,
> > 
> >  So how about we set up some big benchmarking project and we all post
> > results here?
> 
> I always had the feeling that the AMD64 bit version run a bit faster.
> 
> While I haven't set up a complete benchmark project, but I have remapped a
> single image from a project (with lots of black, empty space). No crop
> (nona) or acceleration (PTmender) was used.
> 
> This are the user times:
>              x86 32 bit (s)    AMD64 (s)      speedup
> PTStitcher	35.495
> PTmender	35.675		28.995		23%
> nona            27.588		22.179		24%
> 
> So at least for panoramic stitching, actually using the 64 bit instructions
> on that the AMD64 provides seems to improve remapping speed by ~ 20%
> 
> Note: if fast transform or cropped tiff output would have been used, the
> times would differ a lot. For smaller panos, the fast transform code used by
> PTStitcher and PTmender would blow nona away, while for larger panos, nona
> would be faster
> 
> If there is interest, I can provide the example. However, for very fast
> machine, the IO bandwith will probably the limiting factor
> 
> Details:
> 
> I'm running ubuntu breezy on and AMD64 (almost 2 years old) machine with 1.5
> GB of memory. All programs have been run during the same session. cpu
> frequency was fixed to 2000 MHz during the test.
> 
> > gcc -v
> Target: x86_64-linux-gnu
> gcc-Version 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu9)
> 
> > gcc -v
> Target: i486-linux-gnu
> gcc version 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu9)
> 
> 
> This is what /proc/cpu said about my processor:
> 
> vendor_id       : AuthenticAMD
> cpu family      : 15
> model           : 4
> model name      : AMD Athlon(tm) 64 Processor 3000+
> stepping        : 8
> cpu MHz         : 2002.608
> cache size      : 512 KB
> 
> ciao
>   Pablo
>