Forum > Windows
New version of the KWSN Test & Benchmark Tool with Auto-Installer released
KarVi:
Simon:
On my machine the results are conclusive, and repeatable.
Every time I've run the test, the Intel "only" version was faster.
Off course things can change with other WU's, different number of spikes, gaussians, triplets, the angle range, you name it.
But until anything else is proven, I stick with what my tests tell me.
Simon:
KarVi,
I think it's also pretty model-dependent. For example, on more recent (X2+) AMD CPUs, it seems the Intel-only patched apps are quicker. On my A64 3500+ single core (S939, 512 cache), last time I tested they were slower.
So it's not really such a clear picture for everybody, but like you said: go with what your tests tell you.
I'm currently running some more tests on that A64 system and will put the app on BOINC for a few days to compare run times.
<edit>
Short: same runtime
Medium: SSE2-generic was 6 seconds faster
Long: SSE2-generic was 10 seconds faster
Guess I won't be putting it on BOINC then ;) Like I said, very model-dependent...
</edit>
Regards,
Simon.
KarVi:
Simon:
What rev. is your A64?
I seem to recall something about AMD making some small optimizations to the core, when they added SSE3 ability, and that they pinpointed SIMD and FPU execution in the optimization.
Perhaps this makes a difference? Off-course if your A64 has SSE3, then thats not the case :-)
But if its the case, recomendations could be narrowed down to that if the chip supports SSE3, then the Intel "only" version is recommended (for anyone who is able to patch it).
BenHer:
Patch? --- Patch?...what is this Patch thing you refer to Sir? ::)
KarVi:
Its possible to modify the Intel "only" versions of the aplications, so that they can run on AMD chips. Often even faster than the generic SSE2 version.
But this requires that one knows specifically what to change, or that you have at little patch program or script, which changes the code for you.
Thats the patch I'm talking about.
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