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[Bug middle-end/45422] [4.6 Regression] compile time increases 3x.
- From: "xinliangli at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 25 Jan 2011 17:28:36 +0000
- Subject: [Bug middle-end/45422] [4.6 Regression] compile time increases 3x.
- Auto-submitted: auto-generated
- References: <bug-45422-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45422
--- Comment #36 from davidxl <xinliangli at gmail dot com> 2011-01-25 17:28:30 UTC ---
(In reply to comment #35)
> (In reply to comment #34)
> > -march=native is ambiguous, please see with -v what actually is being used.
>
> This was mentioned in the initial comment:
> -march=k8-sse3 -mcx16 -msahf
> --param l1-cache-size=64 --param l1-cache-line-size=64 --param
> l2-cache-size=1024 -mtune=k8
>
> The latest timings are on a newer machine (old one is gone now) which has:
> -march=amdfam10 -mcx16 -msahf -mpopcnt -mabm --param l1-cache-size=64 --param
> l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amdfam10
I did use the options you originally posted "-ftime-report -cpp -fbounds-check
-g -O3 -ffast-math -funroll-loops -ftree-vectorize -march=native -ffree-form".
The timing is consistently 58s on my 2.4Ghz core-2 box, and 42s on the 2.67Ghz
Xeon machine.