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Message-ID: <4E2D4425.9040104@gnu.org>
Date: Mon, 25 Jul 2011 11:05:00 -0000
From: Paolo Bonzini <bonzini@gnu.org>
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To: Xinliang David Li <davidxl@google.com>
CC: Richard Henderson <rth@redhat.com>,  "gcc@gcc.gnu.org" <gcc@gcc.gnu.org>
Subject: Re: [RFC] Remove -freorder-blocks-and-partition
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On 07/25/2011 06:42 AM, Xinliang David Li wrote:
> FYI  the performance impact of this option with SPEC06 (built with
> google_46 compiler and measured on a core2 box).  The base line number
> is FDO, and ref number is FDO + reorder_with_partitioning.
>
> xalancbmk improves>  3.5%
> perlbench improves>  1.5%
> dealII and bzip2 degrades about 1.4%.
>
> Note the partitioning scheme is not tuned at all -- there is not even
> a tunable parameter to play with.

Did you check what is pushed down to the cold section in these cases?

Paolo