Date: Thu, 11 Apr 1996 19:08:50 -0500 (CDT) From: Tony Kimball <alk@Think.COM> To: langfod@dihelix.com Cc: hackers@FreeBSD.org Subject: Re: pgcc kernel compiles automated Message-ID: <199604120008.TAA03198@compound.think.com> In-Reply-To: <199604112329.NAA19322@caliban.dihelix.com> (langfod@dihelix.com)
next in thread | previous in thread | raw e-mail | index | archive | help
Date: Thu, 11 Apr 1996 13:29:13 -1000 (HST) From: "David Langford" <langfod@dihelix.com> Are you actually using "-mpentium"? IF not I am not sure that using pgcc actually has an advantage :) ; gcc -mpentium -O6 -fomit-frame-pointer t.c -o pentium -lm ; gcc -O6 -fomit-frame-pointer t.c -o generic -lm ; kcc -O6 -fomit-frame-pointer t.c -o shipped -lm ; pentium 10000 1.655895 user ; generic 10000 1.648273 user ; shipped 10000 2.133230 user As far as I can tell, -mpentium doesn't do anything statistically significant, in pgcc 2.7.2.p9 anyhow. I haven't controlled for the gcc version, though, so for all the evidence to date it could just as well be attributable to the antiquity of the shipped compiler. (t.c is a mix of floating point and pointer-chasing.) //alk
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199604120008.TAA03198>