[OE-core] [PATCH 0/6] Enable cloog/ppl when compiling gcc

[Khem Raj]

On Tue, Dec 6, 2011 at 6:37 AM, Richard Purdie
<richard.purdie at linuxfoundation.org> wrote:
> On Mon, 2011-12-05 at 21:21 -0800, Khem Raj wrote:
>> This patchset contains
>>
>> Changes to gcc where now it will be compiled with cloog/ppl support
>> and we have corresponding libraries build as -native and -nativesdk
>> recipes
>
> This gives a hit to the build time of the toolchain and I'm not sure
> what benefits its buying us, particularly if we don't enable the
> optimisations that cloog/ppl is used for.

The total compile time of the toolchain is impacted little since now we have to
build these extra packages but they are relatively small. However I think I need
to measure the total compile time as well to make sure it does not
impact gcc's compile
time performance. My intention was to
provide the capability in the compiler/SDK so that someone can utilize it if
he/she wants. e.g. gnuradio folks I am sure will benefit from it

>
> Whilst this looks nice for experimentation, are there documented
> benefits for a system compiled with this?
>

I did not find official documented advantages but there has been several posts
where improvement in performance has been observed. There was a lengthy thread
I found on gentoo where they saw total system performance boost when
they enabled
graphite.

I think it is more of RFC so people can try it out and then we can weigh
in benefits of it in OE context.