Date: Wed, 20 Dec 2000 10:30:58 -0800 From: "Jeremiah Gowdy" <jgowdy@home.com> To: "Francesco Casadei" <fcasadei@inwind.it>, "Francesco Pennelli" <seroton@iol.it> Cc: <freebsd-questions@FreeBSD.ORG> Subject: Re: FreeBSD 4.1 & 3DNOW! - And other Kernel/CPU questions Message-ID: <001b01c06ab2$ff751500$aa240018@cx443070b> References: <006a01c062db$d7a134c0$0100a8c0@mshome.net> <20001220191014.A598@goku.kasby>
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> Sorry for the late post, but I couldn't read the mailing list last week. > > I have an AMD K6-2 3D 300 MHz processor. I think we can't have 3DNOW! > optimization enabled in the kernel (and it would be useless for the > performance, I think) but you can enable the following options in the kernel > config file: > > machine i386 > cpu I586_CPU > > options CPU_FASTER_5X86_FPU #Enables a faster FPU exception handler > options CPU_SUSP_HLT #Enables suspend on the HALT instruction > options CPU_WT_ALLOC #Enables write allocation on AMD K6-2 > options NO_F00F_HACK #Not a iPentium > options NO_MEMORY_HOLE #15-16MB range not occupied by ISA memory hole Um, having 3D-Now! (SIMD) instructions, the K6-2 is most certainly an MMX processor, so why aren't you using cpu I686_CPU ? I've always been somewhat curious on this. Can we more explicitly label what is 586 and 686 ? Pentium (P54C), Pentium MMX, Pentium Pro, Pentium II, Celeron, Pentium III, Pentium IV, AMD K5, AMD K6, AMD K6-2, AMD K6-3, AMD Athlon K7, AMD Athlon Thunderbird, AMD Duron, WinChips etc are ALL piled in that group somewhere. I always considered it to be, 586 = No MMX, 686 = Yes MMX, the exception being PPro, which I would call 686. Someone with a little more knowledge of the kernel optimizations help us out here ? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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