Re: Re: Re: glibc recompile - optimized for G5 cpu target

Thanks for your feedback Len. You explained how the glibc optimisations work in a manner making it easy for me to understand. Much appreciated! Regards, Peter

Re: Re: glibc recompile - optimized for G5 cpu target

Hi Brock, I have tried lmbench and recompiled glibc 2.21-6 with -O3 and -O2 optimizations with the cflags below: extra_cflags = -mcpu=G5 -mtune=G5 -maltivec -mabi=altivec I haven't actually seen any marked difference to the results coming out of lmbench when using the default Debian glibc and

Re: Re: glibc recompile - optimized for G5 cpu target

On Mon, Jan 11, Peter Saisanas wrote: > Am i doing something wrong, or is there simply no extra performance to be > had just by playing with the cflags and recompiling glibc? Just ask yourself: How many months per year does your cpu execute code from glibc instead of kernel or app code? If you

Re: Re: glibc recompile - optimized for G5 cpu target

On Mon, Jan 11, 2016 at 08:31:39PM +1100, Peter Saisanas wrote: > Hi Brock, > I have tried lmbench and recompiled glibc 2.21-6 with -O3 and -O2 > optimizations with the cflags below: > extra_cflags = -mcpu=G5 -mtune=G5 -maltivec -mabi=altivec > > I haven't actually seen any marked difference to

Re: glibc recompile - optimized for G5 cpu target

Peter, I wish I had a good answer for you regarding relevant and useful benchmark tools,but I just wanted to add that I would like to try and do the same thing for PPC G4 machines using their architecture specific compilation flags as well to see what difference it makes. I'll report back on my

Re: glibc recompile - optimized for G5 cpu target

Hi Peter, On Jan 4, 2016, at 4:02 PM, Peter Saisanas wrote: > Hi, > This has been playing in my mind for a while and wondering if i could get > some feedback from others. > > I assume glibc typically available in the Debian repo's has been compiled for > a generic ppc32

Re: glibc recompile - optimized for G5 cpu target

Hi again. Once my Gentoo is up and running, I will have two almost independent Linux boot options. Also, I choose btrfs for my root file systems for the first time. I will be playing with making snapshots shortly. Obviously this all takes time. And the end of Christmas vacation time is coming