[llvm-commits] [llvm] r142743 - in /llvm/trunk: lib/CodeGen/MachineBlockPlacement.cpp test/CodeGen/X86/block-placement.ll

[Roman Divacky]

On Sun, Oct 23, 2011 at 12:36:17PM -0700, Chandler Carruth wrote:
> On Sun, Oct 23, 2011 at 3:56 AM, Roman Divacky <rdivacky at freebsd.org> wrote:
> 
> > I enabled your MachineBlockPlacement pass by default and ran perlbench.
> >
> > Your pass gets perl from 94% (of gcc4.2.1 compiled one performance) to 96%.
> > Great work!
> >
> 
> That's actually rather surprising. The probabilities we're basing any of
> this on are quite broken. But hey, I'm glad it's improving things. What
> hardware? How stable were the numbers?

The numbers are very stable. The cpu in question was 

CPU: Intel(R) Core(TM)2 Duo CPU     E8500  @ 3.16GHz


roman