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Re: [RFC] Remove -freorder-blocks-and-partition
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?