------- Comment #6 from jv244 at cam dot ac dot uk 2009-05-16 11:31 -------
(In reply to comment #5)
This looks somewhat different from what I get here.
trunk without patch:
vond...@pcihopt3:/data03/vondele/contract> gfortran -O3 -march=native
-ffast-math -funroll-loops -ffree-line-length-200 --param
max-completely-peel-times=27 --param max-completely-peeled-insns=666 test.f90 ;
./a.out
Sparse: time[s] 0.70804399
New: time[s] 0.21201301
speedup 3.3396254
Glfops 3.0564163
Error: 1.11022302462515654E-016
vond...@pcihopt3:/data03/vondele/contract> gfortran -O3 -march=native
-ffast-math -funroll-loops -ffree-line-length-200 test.f90 ; ./a.out
Sparse: time[s] 0.61203802
New: time[s] 0.20801300
speedup 2.9423065
Glfops 3.1151900
Error: 1.11022302462515654E-016
with patch:
vond...@pcihopt3:/data03/vondele/contract> gfortran -O3 -march=native
-ffast-math -funroll-loops -ffree-line-length-200 --param
max-completely-peel-times=27 --param max-completely-peeled-insns=666 test.f90 ;
./a.out
Sparse: time[s] 0.60403699
New: time[s] 0.21201402
speedup 2.8490427
Glfops 3.0564015
Error: 1.11022302462515654E-016
with 4.4_branch:
vond...@pcihopt3:/data03/vondele/contract> gfortran -O3 -march=native
-ffast-math -funroll-loops -ffree-line-length-200 --param
max-completely-peel-times=27 --param max-completely-peeled-insns=666 test.f90 ;
./a.out
Sparse: time[s] 0.70404398
New: time[s] 0.20401198
speedup 3.4509933
Glfops 3.1762841
Error: 1.11022302462515654E-016
vond...@pcihopt3:/data03/vondele/contract> gfortran -O3 -march=native
-ffast-math -funroll-loops -ffree-line-length-200 test.f90 ; ./a.out
Sparse: time[s] 0.66804200
New: time[s] 0.20801300
speedup 3.2115397
Glfops 3.1151900
Error: 1.11022302462515654E-016
-march=native goes to :
-march=k8-sse3 -mcx16 -msahf --param l1-cache-size=64 --param
l1-cache-line-size=64 --param l2-cache-size=1024 -mtune=k8
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40168
