From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20715 invoked by alias); 30 Nov 2007 10:27:19 -0000 Received: (qmail 20644 invoked by uid 48); 30 Nov 2007 10:27:08 -0000 Date: Fri, 30 Nov 2007 10:27:00 -0000 Message-ID: <20071130102708.20643.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/32086] [4.3 Regression] 10% to 20% Performance Regression Between 4.1.3 and 4.3 In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "ubizjak at gmail dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2007-11/txt/msg03028.txt.bz2 ------- Comment #5 from ubizjak at gmail dot com 2007-11-30 10:27 ------- gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=sse induct.f90: user 1m32.226s gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=sse -fno-tree-vectorize induct.f90 user 0m58.492s fortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=387 induct.f90 user 1m40.906s gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=387 -fno-tree-vectorize induct.f90 user 0m46.439s gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=sse -fvect-cost-model induct.f90 user 0m58.168s gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=387 -fvect-cost-model induct.f90 user 0m46.415s All on: Family: 15 Model: 4 Stepping: 10 Type: 0 Brand: 0 CPU Model: Pentium 4 D (Foster) Original OEM Processor name string: Intel(R) Xeon(TM) CPU 3.60GHz (so -march=opteron is a bit misleading) I'd say that vectorizer cost model is doing its job pretty well. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32086