From owner-freebsd-hackers Sat Feb 19 11:51:11 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by hub.freebsd.org (Postfix) with ESMTP id 7FF2237BC43 for ; Sat, 19 Feb 2000 11:51:08 -0800 (PST) (envelope-from dillon@apollo.backplane.com) Received: (from dillon@localhost) by apollo.backplane.com (8.9.3/8.9.1) id LAA96660; Sat, 19 Feb 2000 11:47:50 -0800 (PST) (envelope-from dillon) Date: Sat, 19 Feb 2000 11:47:50 -0800 (PST) From: Matthew Dillon Message-Id: <200002191947.LAA96660@apollo.backplane.com> To: Arun Sharma Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: 64bit OS? References: <20000218150219.A17763@sharmas.dhs.org> <200002190006.QAA82061@apollo.backplane.com> <20000218170214.D18203@sharmas.dhs.org> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG :Madhu Talluri's paper on page tables for 64 bit address spaces claims that :having collision chains is expensive - for 8 bytes of mapping information, :the pointer and tag storage overhead is 16 bytes. : :Though page table space is important, in the age of big memory computers, :I think performance and manageability are more important. : : -Arun I wasn't thinking of having collision chains, at least not long ones. But I see what you mean. -Matt Matthew Dillon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message