The Sun Studio team has many performance tests we use to make sure we continue to deliver a 64-bit x86 compiler that has world-class optimization. I can't say anything about your specific test case obviously. Is the "mdigest" program a part of some widely used benchmark or a commonly used open source application?
> Is there a chance that SunStudio will get better optimization for amd64? I believe our amd64 optimization gets better with each release, although the nature of compiler optimization means that there will always be some give-and-take between releases in any specific app. --chris Joerg Schilling wrote: > Since a longer time, the SunStudio optimizer creates significantly > better optimized code for intel 32 Bit binaries (typically 20%-30% > faster than what GCC creates). > > If you try to create 64 bit binaries, things look different. > > If you e.g. get my recent Schily source consolidation, you will see that > the Reed Solomon Coder and the libmdigest code get slower binaries from > SunStudio. > > Get ftp://ftp.berlios.de/pub/schily/schily-2009-08-12.tar.bz2 > > and call: > > gmake to first create a smake boostrap binary and then use this smake > boostrap to create Sun Studio 32 bit binaries. > > > > then call: > > psmake/smake CCOM=cc64 to create 64 Bit Sun Studio binaries > psmake/smake CCOM=gcc to create 32 Bit GCC binaries > psmake/smake CCOM=gcc64 to create 64 Bit GCC binaries > > Then call: > > mdigest/OBJ/i386-sunos5-cc/mdigest -a sha512 some-file > mdigest/OBJ/i386-sunos5-cc64/mdigest -a sha512 some-file > mdigest/OBJ/i386-sunos5-gcc/mdigest -a sha512 some-file > mdigest/OBJ/i386-sunos5-gcc64/mdigest -a sha512 some-file > > and compare the speed and the user CPU time. > > You may also chdir to "libedc" and call smake -f speed.mk > to create a Reed Solomon speed test..... > > Is there a chance that SunStudio will get better optimization for amd64? > > J?rg >
