On Mon, Dec 11, 2006 at 11:35:27AM -0600, Menezes, Evandro wrote: > HJ, > > > > Gcc 4.3 revision 119497 has very poor SPEC CPU 2006 FP performance > > > regressions on P4, Pentium M and Core Duo, comparing aganst > > > gcc 4.2 20060910. With -O2, the typical regressions look like > > > > > > Gcc 4.2 Gcc 4.3 > > > 410.bwaves 9.89 9.14 -7.58342% > > > 416.gamess 7.17 7.16 -0.13947% > > > 433.milc 7.68 7.65 -0.390625% > > > 434.zeusmp 5.57 5.55 -0.359066% > > > 435.gromacs 3.99 4.02 0.75188% > > > 436.cactusADM 4.59 4.50 -1.96078% > > > 437.leslie3d 5.78 3.98 -31.1419% > > > 444.namd 6.25 6.18 -1.12% > > > 447.dealII 11.3 11.3 0% > > > 450.soplex 8.61 8.59 -0.232288% > > > 453.povray 6.70 6.72 0.298507% > > > 454.calculix 2.81 2.74 -2.4911% > > > 459.GemsFDTD 6.07 4.95 -18.4514% > > > 465.tonto 4.44 4.45 0.225225% > > > 470.lbm 10.6 10.7 0.943396% > > > 481.wrf 4.56 4.50 -1.31579% > > > 482.sphinx3 11.2 11.1 -0.892857% > > > Est. SPECfp_base2006 6.42 6.15 -4.20561% > > > > > > Evandro, what do you get on AMD? > > > > > > Is that related to recent i386 backend FP changes? > > Here's what we got: > > ?% > CPU2006 > 410.bwaves -6% > 416.gamess > 433.milc > 434.zeusmp > 435.gromacs > 436.cactusADM > 437.leslie3d -26% > 444.namd > 447.dealII > 450.soplex > 453.povray > 454.calculix > 459.GemsFDTD -12% > 465.tonto > 470.lbm > 481.wrf > 482.sphinx3 > > Though not as pronounced, definitely significant. >
It is close to what we see on both x86 and x86-64. Are you going to track it down? H.J.
