------- Comment #6 from burnus at gcc dot gnu dot org 2010-02-23 15:29 -------
Result with current trunk (4.5.0 2010-02-23 Rev. 156999)
In a nutshell: gas_dyn is still slower - now 35% instead of 70%.
-fgraphite-identity has normal speed (or a tiny bit faster?!?), but all other
options (-floop-interchange, -floop-strip-mine, and -floop-block) cause the
slow down. -- nf is 6% slower and the rest looks fine.
* * *
System: AMD Athlon 64 X2 Dual Core Processor 4800+ @ 2.4 GHz
Base options: gfortran -march=opteron -ffast-math -funroll-loops
-ftree-vectorize -ftree-loop-linear -msse3 -O3
LTO uses additionally the options "-flto -fwhole-program -fno-protect-parens"
Used graphite options: "-floop-interchange -floop-strip-mine -floop-block"
LTO No LTO
ac 1% faster (13.16s vs. 13.31s) = (13.29s vs. 13.35s)
aermod = (30.69s vs. 30.87s) = (34.32s vs. 34.58s)
air = (15.64s vs. 15.68s) 2% faster (15.72s vs. 15.68s)
capacita 6% SLOWER (86.92s vs. 82.14s) 2% faster (81.66s vs. 82.92s)
channel = (15.36s vs. 15.28s) 3% faster (15.26s vs. 15.71s)
doduc 5% faster (40.97s vs. 43.05s) 5% faster (40.28s vs. 42.51s)
fatigue 2% SLOWER ( 7.21s vs. 7.08s) 4% SLOWER ( 9.99s vs. 9.57s)
gas_dyn 35% SLOWER (15.35s vs. 11.36s) 37% SLOWER (15.36s vs. 11.19s)
induct 14% faster (29.15s vs. 33.90s) 24% faster (28.07s vs. 37.08s)
linpk 1% faster (30.34s vs. 30.68s) 2% faster (30.40s vs. 31.03s)
mdbx 2% faster (20.15s vs. 20.56s) = (19.40s vs. 19.48s)
nf 6% SLOWER (33.49s vs. 31.49s) 6% SLOWER (33.61s vs. 31.62s)
protein = (64.51s vs. 64.24s) 3% SLOWER (65.65s vs. 63.84s)
rnflow 2% faster (36.07s vs. 36.82s) = (35.10s vs. 34.96s)
test_fpu = (21.93s vs. 21.85s) 2% faster (20.76s vs. 21.28s)
tfft 2% faster ( 8.25s vs. 8.43s) 1% faster (8.22s vs. 8.33s)
Geo.Mean 1% SLOWER (23.66s vs. 23.42s) = (24.00s vs. 23.99s)
* * *
gas_dyn.f90 only results:
A) w/o Graphite
real 0m11.281s user 0m11.013s sys 0m0.044s
B) w/ -fgraphite-identity
real 0m10.622s user 0m10.533s sys 0m0.080s
C) w/ -floop-interchange
real 0m15.077s user 0m14.785s sys 0m0.068s
D) w/ -floop-strip-mine
real 0m15.818s user 0m15.205s sys 0m0.052s
E) w/ -floop-block
real 0m15.349s user 0m15.249s sys 0m0.080s
F) w/ -floop-interchange -floop-strip-mine
real 0m15.740s user 0m15.589s sys 0m0.044s
G) w/ -floop-interchange -floop-strip-mine -floop-block
real 0m15.658s user 0m15.333s sys 0m0.040s
--
burnus at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[Graphite] 70% slower using |[Graphite] 35% slower using
|-floop* than without |-floop* than without
|graphite (gas_dyn of |graphite (gas_dyn of
|Polyhedron) |Polyhedron)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38846
