[Bug fortran/20945] about 2x perfomance regression in comparision with 3.4.2

2005-06-22 Thread denis dot nagorny at intel dot com 

--- Additional Comments From denis dot nagorny at intel dot com  2005-06-22 
14:34 ---
Ok. It seems like this issue is mostly fixed now. I incresead NIT counter up 
to 200 and obtained following results:
3.4.2 ~ 3.4s
old 4.0 ~ 6.4s
mainline ~ 4.0s


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20945

[Bug fortran/20945] about 2x perfomance regression in comparision with 3.4.2

2005-06-19 Thread fxcoudert at gcc dot gnu dot org 

--- Additional Comments From fxcoudert at gcc dot gnu dot org  2005-06-19 
07:34 ---
On Pentium III (Coppermine), 864 MHz, 256 KB cache, with linux. Timing in 
seconds:

g77: 9.52s
gfortran: 9.49s
g77 -O2: 3.11s
gfortran -O2: 3.39s
g77 -O3 -ffast-math: 3.09s
gfortran -O3 -ffast-math: 3.37s

So, I can't confirm your timings. You should perhaps use longer loops (since
your timings are less than a second, you could see the effect of something
external to the floating-point performance itself).

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20945

[Bug fortran/20945] about 2x perfomance regression in comparision with 3.4.2

2005-04-18 Thread hjl at lucon dot org 


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   What|Removed |Added

 CC||hjl at lucon dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20945

[Bug fortran/20945] about 2x perfomance regression in comparision with 3.4.2

2005-04-11 Thread pinskia at gcc dot gnu dot org 

--- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-11 
20:08 ---
Note I think this is just the register allocator being stupid.
See PR 18048 for another bug report about this.

Though I note on ppc-darwin, I cannot reproduce the problem you see with your 
testcase.

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   What|Removed |Added

  BugsThisDependsOn||18048


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20945

[Bug fortran/20945] about 2x perfomance regression in comparision with 3.4.2

2005-04-11 Thread pinskia at gcc dot gnu dot org 

--- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-11 
13:28 ---
I know that gfortran has some issue with inlining.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20945

[Bug fortran/20945] about 2x perfomance regression in comparision with 3.4.2

2005-04-11 Thread denis dot nagorny at intel dot com 

--- Additional Comments From denis dot nagorny at intel dot com  2005-04-11 
13:20 ---
Created an attachment (id=8591)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8591&action=view)
Test for results reproducing


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20945