Vladimir Makarov wrote:
I heard a lot of this compiler and expected a better results for it. Using -O2 -mtune=nocona for gcc4 and -O2 -mtune=em64t for open64 on em64t machine in 32-bit mode, I found preliminarily that pathscale compiler generates about 10% worse and 30% larger code (text segment) for SPECInt2000. It is also 70% slower than gcc4. I just hope results for 64-bit mode, amd machine, or SPECFP2000 are better.
You might want to give the official release a try. (In other words, I don't think it's safe to use our "distribution" to judge EKOPath.) http://www.pathscale.com/ekopath.html AFAIU, LNO is not performed at -O2, so you should use -O3. And, if I managed to build the IPA module, you should use -Ofast. If you are interested, I can run SPECint2000 on a 3.0 GHz Northwood core, and report the results here. Finally, as James noted, the performance on AMD CPUs should be higher than that on Intel CPUs. -- Regards, Marc
