Date: Mon, 28 Aug 2006 09:47:15 +0800 From: ke han <ke.han@redstarling.com> To: Wojciech Puchar <wojtek@tensor.3miasto.net> Cc: Martin Miedema <martin.miedema@gmail.com>, freebsd-questions@freebsd.org Subject: Re: Intel 64bit / AMD 64 bit advantage Message-ID: <47B7C4B9-BB47-48EE-A70B-9A9D6B671207@redstarling.com> In-Reply-To: <20060827220002.C19869@chylonia.3miasto.net> References: <44EF0F92.80108@gmail.com> <DB15A255-9E7E-4D13-A88D-C9763096B143@redstarling.com> <20060827220002.C19869@chylonia.3miasto.net>
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On Aug 28, 2006, at 4:03 AM, Wojciech Puchar wrote: >> 32 vs 64 bits does not give you any raw performance boost for most >> apps. The > > yes it will. FreeBSD/amd64 works at least 10% faster than FreeBSD/ > i386 on athlon64 machine, when i386 version were recompiled for P4. > With default FreeBSD/i386 - it will be at least 30%. > > just because it's not just 64-bit addresses, but twice the > registers (r8-r15) allowing C compiler to generate more efficient > code. > > For now AMD64 is the fastest and cheapest architecture - at least > with AMD processors, not intel clones. (YES now intel makes clones > of AMD processors) I stand corrected ;-)...This is good info, thanks. However, to the original post, you will not see 10-30 % performance difference on your email or file sharing between an Intel Celeron and AMD Opteron. These types of apps are Disk and Network IO bound. Spend your money on redundancy/fail-over of hard drive and power supply. Also choosing a well regarded NIC is important. ke han > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions- > unsubscribe@freebsd.org"
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