Compiler performance tests on FreeBSD 10.0-CURRENT
sgk at troutmask.apl.washington.edu
Thu Sep 6 15:19:20 UTC 2012
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
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.
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