A small question about multithread on Cell blade!

[zzcn]

hi, I use multithread dispatcher with pthread (not USE_LIBSPE2) on a cell blade which has two cell CPUs. It's supposed that only the two PPUs will been used not the 16 SPUs, it that ture?
I asked this because i saw the console output like this:
sizeof SpuGatherAndProcessWorkUnitInput: 16

thanks!

kun

[Erwin Coumans]

When you use pthread, it will not use the SPUs, but PPU instead.

Why aren't you using USE_LIBSPE2 and LibSpe2Support? That is using SPUs and should be much faster.
Thanks,
Erwin

[zzcn]

thanks a lot for your replay erwin.

i tried USE_LIBSPE2 earlier, but i always got segfault in my program when i called the "malloc" or "posix_memalign" functions, it tried to debug it, the segfault came out from the functions in the file "btAlignedAllocator.cpp" and I couldn't fix it.

Right now the bottle neck of program is not the cell blade, so i thought i should solve this problem maybe later, at least the normal version works fine.

If you can give me some suggestion about using the "USE_LIBSPE2", that will be very appreciated.

cheers
kun

[zzcn]

hi, i found out the mistake i made in my program why segfault came out with malloc when I USE_LIBSPE2. It's a stupid compiling and configuration mistake.

now there is some other segfault, but i will working on it.

thx

kun