Compiler performance tests on FreeBSD 10.0-CURRENT

[Steve Kargl]

On Thu, Sep 06, 2012 at 10:43:12AM +0200, Roman Divacky wrote:
> On Wed, Sep 05, 2012 at 03:13:11PM -0700, Steve Kargl wrote:
> > 
> > Compiling libm on 
> > 
> > CPU: AMD Opteron(tm) Processor 248 (2192.01-MHz K8-class CPU)
> >   Origin = "AuthenticAMD"  Id = 0xf5a  Family = f  Model = 5  Stepping = 10
> >   Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,\
> >                      MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
> >   AMD Features=0xe0500800<SYSCALL,NX,MMX+,LM,3DNow!+,3DNow!>
> > 
> > with default CFLAGS (ie., -O2 -pipe) and -march=opteron.
>  
> Was this compiled as amd64 or i386? Also, can you send me the test case?
> So that we can explore the difference. The working theory now is SSE vs FPU
> mathematics, but it would be nice to see the testcase.
> 
> Thank you, roman
> 

It was compiled on amd64.  I can do the same testing on i386
this weekend.

The testcase is not a self-contained piece of code.  It
uses parts of my floating point test frame.  Putting
together the testcase may take a few hours.

-- 
Steve