Date: Thu, 19 Apr 2001 11:31:07 -0400 From: Michael Adler <Michael.Adler@compaq.com> To: freebsd-hackers@FreeBSD.ORG Subject: Re: The future of multiprocessors (was: SMP in 2.4 (fwd)) Message-ID: <5.1.0.14.0.20010419111106.02d68f50@vssad.hlo.dec.com> In-Reply-To: <20010419074903.B28694@osaka.louisville.edu> References: <20010419121051.D72816@wantadilla.lemis.com> <5.0.2.1.0.20010418190439.03633920@mail.etinc.com> <Pine.LNX.4.21.0104182313560.1685-100000@imladris.rielhome.conectiva> <20010419121051.D72816@wantadilla.lemis.com>
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A number of our larger customers care about computation/cubic foot. The density of processors is important to them. SMP machines work well here. A future Alpha processor will be an SMT (symmetric multi threaded) machine. Above the lowest levels, it will look like a multi-CPU machine. The machine will keep multiple thread contexts live within the CPU and will be capable of switching between these threads in a single cycle. As it grows harder for compilers to find parallelism within a single thread we have had to look elsewhere to keep the machine busy. -Michael To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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