[google] Increase hotness count fraction

[Ramana Radhakrishnan]

On 24 August 2011 22:43, Mark Heffernan <meheff@google.com> wrote:
> This patch bumps up the parameter 'hot-bb-count-fraction' from 10000
> to 40000.  This results in about a 0.5% geomean performance
> improvement across internal benchmarks for x86-64 LIPO.  The parameter
> change effectively increases the number of functions/callsites which
> are considered hot.  The performance improvement is likely due to
> increased inlining (more callsites are considered hot and available
> for inlining).
>
> Bootstrapped and reg-tested on x86-64.  OK for google/gcc-4_6?

I know this is intended for the google branches but shouldn't such a
change be in the x86_64 backend rather than such a general change to
params.def .

My 2 cents.

cheers
Ramana