Re: [xine-user] 0.94 deb package: Memry bench says: Illegal Instruction!

[Harm v. d. H. <ha...@et...>]

On Mon, Nov 12, 2001 at 07:47:30PM +0100, Stefan Kombrink wrote:
> hi folks,
>=20
>   though i didn't install never any other stuff than deb packages, i re=
moved=20
> everything xine-related (d4d-plugin etc) and reinstalled the 0.94 packa=
ges
> (xinelib&xine-ui only)again...
> ...but still the same weird thing:
>=20
> Benchmarking memcpy methods (smaller is better):
>         glibc memcpy() : 580454968
>         linux kernel memcpy() : 587469546
>         MMX optimized memcpy() : 588156158
>         MMXEXT optimized memcpy() : 516616921
> Ung=FCltiger Maschinenbefehl

That's "Illegal instruction" for those who don't read German :-)

> my system is piii 850 / 128MB / SavageMX+XFree 4.10 / Debian Woody

If your linux kernel is not explicitly compiled for P3/Athlon type cpu's,=
=20
you'll automatically get this error even though the cpu supports the SSE
instruction set. That's not linux's fault but done so intentionally by
intel's designers (but I forget why for the moment).

Solution is to compile/get a kernel compiled for the P3, or (easier) set
fast_memcpy:3 in .xinerc to bypass the test and use MMXEXT. This problem =
has
been reported a few times now, so it'll probably be fixed in 0.9.5.

Harm