Date: Thu, 22 May 2003 10:56:15 -0700 From: "David O'Brien" <obrien@freebsd.org> To: Pavel Kraynyukhov <pavelkraynyukhov@mail.ru> Cc: freebsd-performance@freebsd.org Subject: Re: freebsd-performance Digest, Vol 3, Issue 11 Message-ID: <20030522175615.GB81438@dragon.nuxi.com> In-Reply-To: <002901c32031$d332bd30$0101a8c0@erfolg> References: <20030521190037.2041F37B404@hub.freebsd.org> <002901c32031$d332bd30$0101a8c0@erfolg>
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On Thu, May 22, 2003 at 09:14:45AM +0200, Pavel Kraynyukhov wrote:
> As far as i know HyperThreading is an Intel trademark and technologie as
> well.
> AMD has something similar for them processors, but i have no idea is such
> feature supported by FreeBSD for AMD processors.
I can tell you with upmost authority that AMD does not have something
like HyperThreading in its CPU's -- not even in K8.
> > I gotta question. I am contemplating buying the new AMD Opteron for a
> > newer FreeBSD server. I am certain because of it's x86 compatibility
> > running FBSD won't be a problem,
Nope, no problems:
FreeBSD 5.1-BETA #9: Thu May 22 09:20:08 GMT 2003
root@k8.amd.com:/hammer/sys/amd64/compile/GENERIC
CPU: AuthenticAMD AMD64 Class Processor
Origin = "AuthenticAMD" Id = 0xf40 Stepping = 0
Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CM
OV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
AMD Features=0xe0500000<<b20>,AMIE,<b29>,DSP,3DNow!>
# file /boot/kernel/kernel
/boot/kernel/kernel: ELF 64-bit LSB executable, AMD x86-64, version 1 (FreeBSD),
dynamically linked (uses shared libs), not stripped
> > and I know that there is a 64Bit Apache
> > underways, but is there any 64 bit MySQL Server on the way? Or does MySQL
> > compile with that option? I am certain it can be built with Hyper
> > Threading, but can that help performance on a single 64 bit CPU? Please
> > help! (before I invest :-))
It will perform very well -- HyperThreading does is not the same as
having two real processors. Some apps do perform better on a
HyperThreaded CPU, others don't.
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