|Bill Allombert on Thu, 10 Jul 2003 16:34:07 +0200|
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|Re: Performance question|
On Wed, Jul 09, 2003 at 02:31:56PM -0700, firstname.lastname@example.org wrote: > Hi, all, > > There may be something obvious that I'm overlooking, but I am seeing a > performance difference between two machines that seems > counter-intuitive. > > I have gp on two Mac OS X systems (10.2.6 and, um, another one). > 10.2.6 is on a 450Mhz G4, while the other one is on a 300Mhz G3. When > I ran 'make bench' on the G3, it seemed to do much better than on the > G4. > parisize = 4000000, primelimit = 500000 > ============================================================ > > FWIW, gcc on the G4 is 3.1, and on the G3 is 3.3. Care to try with the same compiler on both machines ? Most probably the difference come from the compiler. The other possibility is the assembly kernel that can be faster on one CPU than on the other but I doubt it. Cheers, Bill.