Re: [gentoo-user] About this graphite stuff

[victor romanchuk]

Alex Schuster wrote, at 01/29/2012 11:23 PM:
> What are your impressions on this? Is it fun? Will there be a noticeable
> speed difference? Do packages fail to build? We just had a 'Graphite
> causing trouble' thread here, the problem was that dev-libs/cloog-ppl
> has to be rebuilt when dev-libs/ppl has been updated. Can there be other
> problems, which would make me waste much more time than I could
> possibly gain by using these optimizations?
>

i'm using graphite on core-i7 (950), x86_64 since the release of gcc-4.4.5 and
consider it as 'just fun' - i did not observe significant speed difference but
it should depend on a software you're going to 'graphitize'. things installed on
my desktop are mostly for development (emacs, gdb, *sql, php, perl) with trivial
multimedia (mplayer with gnome frontend), a set of web browsers and ordinary
office framework: thunderbird, pidgin and libreoffice

just for reference these are CFLAGS from my /etc/make.conf:

CFLAGS="-O2 -g0 -march=core2 -msse4 -mcx16 -mpopcnt -msahf \
        -ftree-loop-distribution -ftree-loop-linear -mmmx \
        -floop-interchange -floop-strip-mine -floop-block -pipe"

i do not use 'native' flag because that machine acts as distcc server for
several smaller core-i<x> computers

the only graphite incompatibility i've detected is x11-wm/compiz; however this
is easily worked around using portage environment quirks in
/etc/portage/env/x11-wm/compiz:

CFLAGS="-O2 -g0 -march=core2 -msse4 -mmmx -pipe"
CXXFLAGS=${CFLAGS}