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Re: sched2 seems to be disabled on x86
- From: Neil Booth <neil at daikokuya dot co dot uk>
- To: Dan Nicolaescu <dann at ics dot uci dot edu>
- Cc: gcc at gcc dot gnu dot org
- Date: Sat, 28 Jun 2003 23:13:04 +0100
- Subject: Re: sched2 seems to be disabled on x86
- References: <200306282142.h5SLgV4X014515@gremlin.ics.uci.edu>
Dan Nicolaescu wrote:-
>
> The subject says it all: on mainline checked out today, sched2 seems
> to be disabled on x86.
> It was enabled 2 weeks ago.
>
> This is in the ChangeLog about this, so it's probably not
> intentional. Any idea what is going on?
>
>
> It's interesting that some of the SPEC int benchmarks seem to benefit
> from this:
>
> http://people.redhat.com/dnovillo/spec2000/gcc/global-run-ratio.html
> http://people.redhat.com/dnovillo/spec2000/gcc/individual-run-ratio.html
>
> The output of -fverbose-asm is also quite different:
Whilst I'd love to take credit for a speed-up, I think the credit lies
elsewhere. The output of -fverbose-asm is simply not reporting the
facts.
I'm not sure what to do about this as it used to be driven off the
f_options table, which will eventually cease to exist.
Neil.