From owner-freebsd-arch@FreeBSD.ORG Fri Oct 8 10:39:16 2010 Return-Path: Delivered-To: freebsd-arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 59BFD106566B; Fri, 8 Oct 2010 10:39:16 +0000 (UTC) (envelope-from rwatson@FreeBSD.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id 301658FC0C; Fri, 8 Oct 2010 10:39:16 +0000 (UTC) Received: from fledge.watson.org (fledge.watson.org [65.122.17.41]) by cyrus.watson.org (Postfix) with ESMTPS id 9EF9146B52; Fri, 8 Oct 2010 06:39:15 -0400 (EDT) Date: Fri, 8 Oct 2010 11:39:15 +0100 (BST) From: Robert Watson X-X-Sender: robert@fledge.watson.org To: Ivan Voras In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: freebsd-arch@freebsd.org Subject: Re: Porting effort towards TILERA massive multicore CPUs...? X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 08 Oct 2010 10:39:16 -0000 On Mon, 4 Oct 2010, Ivan Voras wrote: >>> there is a rather new processor from TILERA (100 core chip) which is most >>> certainly already known here at FreeBSD mailing list. >> >> Theory has it I'll be getting access to Intel SCC 48/96-core hardware here >> at Cambridge in the moderately near future, and I've been pondering what >> would be involved. Their model involves 48+ x86 cores without cache >> coherency, so you need separate OS instances for each. However, the cores >> are linked by fifo-like memory that we'll need to figure out what to do >> with. > > Sounds pretty much made for a variation on the microkernel design, or > virtualization. With repsect to the former: more the distributed microkernel model, or the recently more trendy "multikernel" which appears to be functionally quite similar :-). For the latter: yes, hence the name Single-Chip Cloud Computer. If the TILERA is offering stronger cache coherence properties with similar scalability, that makes it a more appealing target, however. Robert