From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Lehmann To: egcs@cygnus.com Cc: axp-list@redhat.com Subject: Re: Performance measurements Date: Wed, 01 Jul 1998 21:20:00 -0000 Message-id: <19980702003443.62031@cerebro.laendle> References: <199806240851.KAA06049@keksy.mchp.siemens.de> X-SW-Source: 1998-07/msg00065.html I couldn't resist as well: -V2.7.2.3 -O6 -mno-align-double 70.99 MFLOPS -V2.7.2.3 -O6 -malign-double 113.78 MFLOPS -V1.0.3 -O6 -mno-align-double 125.62 MFLOPS -V1.0.3 -O6 -malign-double 122.43 MFLOPS egcs-980628 -O6 -malign-double -funroll-all-loops 135.17 MFLOPS egcs-980628 -O6 -mno-align-double 141.39 MFLOPS egcs-980628 -O6 -malign-double -mpentiumpro -march=pentiumpro 144.41 MFLOPS pgcc-980628 -O2 -malign-double -mno-stack-align-double 155.72 MFLOPS pgcc-980628 -O2 -malign-double -mstack-align-double 155.72 MFLOPS pgcc-980628 -O6 -malign-double -mstack-align-double 157.91 MFLOPS pgcc-980628 -O6 -malign-double -funroll-all-loops 162.46 MFLOPS -B/root/cc/egcs-mmx/gcc/ -O6 -mmx 142.58 MFLOPS (hardware is a P-II 333) now, what is _quite_ interesting is that pgcc (Which means egcs+pentium patches) seems to perform better with -O2 than egcs with -O6, which is illogical, since I always believed egcs-O2 should be as fast as pgcc-O2 (and in general, pgcc's fpu performance is sometimes better, sometimes worse than corresponding egcs versions, and many programs perform only slightly better with pgcc on p-ii than with egcs). I guess I should use that program to show that pgcc is soo much faster ;) I also don't see the bad performance of egcs vs. gcc-2.7.2.3 -----==- | ----==-- _ | ---==---(_)__ __ ____ __ Marc Lehmann +-- --==---/ / _ \/ // /\ \/ / pcg@goof.com |e| -=====/_/_//_/\_,_/ /_/\_\ --+ The choice of a GNU generation | |