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Re: some benchmarks
- From: Steve Kargl <sgk at troutmask dot apl dot washington dot edu>
- To: Jack Howarth <howarth at bromo dot msbb dot uc dot edu>
- Cc: fortran at gcc dot gnu dot org
- Date: Sun, 27 Nov 2005 12:02:38 -0800
- Subject: Re: some benchmarks
- References: <20051127194838.EAF1E1DC06D@bromo.msbb.uc.edu>
On Sun, Nov 27, 2005 at 02:48:38PM -0500, Jack Howarth wrote:
> Steve,
> FYI, the benchmarks I posted already had -mtune=670. Adding
> -funroll-loops results in only about a 1% improvement in the overall
> benchmark time.
> Jack
According to gcc.info for PPC
`-mtune=CPU_TYPE'
Set the instruction scheduling parameters for machine type
CPU_TYPE, but do not set the architecture type, register usage, or
choice of mnemonics, as `-mcpu=CPU_TYPE' would.
-mcpu=670 might provide better performance. Don't know if it's
a big or tiny or no benefit.
--
Steve