Mainline mt_allocator performance on sparc-sun-solaris2.8

[Benjamin Kosnik]

>This is slower than gcc-3.4.1.  Percentage difference between each
>slot on the gcc-3.4.1 table and gcc-4.0.0 table:
>
>        -4.867% -15.324% -8.733% -15.224% -13.925% -2.035%
>        -4.995%  -4.872% -7.592%  -9.126%  -3.582% -6.545%
>        -11.423% -6.209%  9.218%  -5.644% --3.759% -0.530%
>
>This seems fairly significant to me.

I see this too. If you switch from __common_pool_policy to
__per_type_pool_policy it should go away, due to improved inlining. I'd
like to elaborate on this, but before I do can I get your test program?
I don't see it in any of the posts.

You can force single threaded behavior, even from threads enabled
configs in the current mt_alloc sources.

-benjamin