On Tue, 2009-08-25 at 13:58 +0000, Alex Queiroz wrote:
On 8/25/09, Bradley Lucier lucier@math.purdue.edu wrote:
So I'm asking that people might run the benchmark suite on various architectures after configuring gambit with, e.g.,
./configure CC="gcc -fschedule-insns" --enable-single-host
and compare the result to those without adding -fschedule-insns to the command line. I suspect that for both ppc(64) and x86-64 there could be noticeable speedup, but I'm not sure what will happen with arm or some of the other architectures that Gambit might run on.
I did not recompile Gambit-C but built a module of mine with and
without this option. This module implements searching in game trees and uses only fixnum arithmetic. I did got better execution times with this option. This is on SPARC with GCC 2.95 (!!!) and:
-Wno-unused -O1 -fschedule-insns -fschedule-insns2 -fno-strict-aliasing -fomit-frame-pointer -fPIC -fno-common -shared
Thank you for testing it.
Unfortunately, trying to build 4.5.1 with these options results in a gcc error compiling os_base.c; I've reported this at
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41164
It seems to affect the 4.2, 4.3, 4.4, and current development series gcc. Not so good.
So I guess we wait a bit.
Brad