Date: Fri, 27 Feb 2015 20:24:05 -0800 From: John-Mark Gurney <jmg@funkthat.com> To: R0B_ROD <witchdoctor.mdf@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Connection Message-ID: <20150228042405.GV32329@funkthat.com> In-Reply-To: <20150228025936.GA1640@p4-bsd> References: <20150228025936.GA1640@p4-bsd>
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R0B_ROD wrote this message on Fri, Feb 27, 2015 at 21:59 -0500:
> Hello,
> The optimization level -O3
> in "CFLAGS and COPTFLAGS -O3 -pipe -funroll-loops"
> options in /etc/make.conf, have any relation to the
> CPU having SSE3 and SSE4A features??
Not really.. the kernel doesn't allow the use of the fpu, unless you
use interface provided in fpu_kern(9)...
Also, the amd64 ABI doesn't mandate the presence of SSSE3 or SSE4A,
so unless you do special work (which I plan on doing), even userland
can't make use of them unless specially instructed (or you build your
own binaries and don't mind them not always working on other computers)..
> I have built over a dozen kernels for my laptop
> with 10.1-STABLE. My last one was the smallest
> and it was an accident, I just kept messing around.
> The machine is truly responsive. Also adjusted ZFS
> and other sysctl tunables. I am very happy with BSD.
> I came from Linux with no real UNIX knowledge.
> Hoping I can learn asm/C. Thanks for the time.
Glad you are enjoying it...
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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