On Thursday 16 April 2009 01:39:07 Bill Hart wrote: > Wait a minute. Is that really true. Shouldn't x86_64 use the assembly > code in the x86_64 directory, which should be considerably better than > GMP 4.2.1?
yes , it uses asm code in x86_64 dir , which is the same as 4.2.1 , pretty much. > > Bill. > > 2009/4/16 Jason Moxham <ja...@njkfrudils.plus.com>: > > On Thursday 16 April 2009 01:15:17 Jeff Gilchrist wrote: > >> On Wed, Apr 15, 2009 at 2:33 PM, Bill Hart <goodwillh...@googlemail.com> > > > > wrote: > >> > As no issues with the MPIR 1.1.0 release candidate were found after > >> > extensive testing, we are making release candidate 1 the final > >> > release. > >> > >> Here are some benchmarks. With K8, MPIR is very competitive with the > >> new GMP. For some reason my core2 builds are strange. The MPIR 1.1 > >> library is much slower than 1.0. Config in 1.0 and 1.1 is detecting > >> the system as: x86_64-unknown-linux-gnu so trying to use K8 code with > >> it. I'm not sure why there is such a speed difference between the 1.0 > >> and 1.1 K8 code on a Core 2 though. > > > > The detection code is a little bit different than before. If config,guess > > recognizes your cpu then it reports k8-*-* or penryn-*-* etc . If it > > doesn't recognize the exact cpu then it will just report x86-*-* or > > x86_64-*-* whatever it can detect , and the resultant build will use the > > lowest common denominator , which in your case was x86_64 so you get a > > build which runs like the old gmp-4.2.4 , safe but slow. > > The real question is why it hasn't detected your cpu properly? > > > > can you do a cat /proc/cpuinfo > > > > thanks > > Jason > > > >> MPIR Benchmarks > >> =============== > >> mpz_mul(t, r, r); > >> mpz_sub_ui(t, t, 2); > >> mpz_mod(r, t, p); > >> > >> Intel Xeon E5405 @ 2.0GHz (Family 6, Model 23, Stepping 6) > >> Linux 64bit, gcc version 4.1.2 > >> 83338 bits (25088 digits) > >> Library Time1 Time2 > >> ---------- --------- --------- > >> GMP 4.3.0 2m34.857s 2m34.835s > >> MPIR 1.0.0 3m17.198s 3m17.288s > >> GMP 4.2.4 5m38.156s 5m38.173s > >> MPIR 1.1.0 5m45.308s 5m45.236s > >> > >> > >> AMD Opteron 248 @ 2.2GHz (Family 15, Model 37, Stepping 1) > >> Linux 64bit, gcc version 3.4.6 > >> 83338 bits (25088 digits) > >> Library Time1 Time2 > >> ---------- --------- --------- > >> GMP 4.3.0 1m35.091s 1m34.815s > >> MPIR 1.1.0 1m36.480s 1m35.923s > >> MPIR 1.0.0 1m37.501s 1m36.857s > >> GMP 4.2.4 2m56.352s 2m55.702s > >> > >> Jeff. > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "mpir-devel" group. To post to this group, send email to mpir-devel@googlegroups.com To unsubscribe from this group, send email to mpir-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/mpir-devel?hl=en -~----------~----~----~----~------~----~------~--~---
