From owner-freebsd-smp Fri Apr 23 15:25:24 1999 Delivered-To: freebsd-smp@freebsd.org Received: from dingo.cdrom.com (castles539.castles.com [208.214.165.103]) by hub.freebsd.org (Postfix) with ESMTP id 8179A14CC6 for ; Fri, 23 Apr 1999 15:25:10 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost [127.0.0.1]) by dingo.cdrom.com (8.9.3/8.8.8) with ESMTP id HAA00413; Fri, 23 Apr 1999 07:42:17 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Message-Id: <199904231442.HAA00413@dingo.cdrom.com> X-Mailer: exmh version 2.0.2 2/24/98 To: Peter Wemm Cc: "Daniel J. O'Connor" , freebsd-smp@FreeBSD.ORG Subject: Re: Really slow SMP In-reply-to: Your message of "Wed, 21 Apr 1999 22:52:06 +0800." <19990421145208.8A7571F2A@spinner.netplex.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 23 Apr 1999 07:42:17 -0700 From: Mike Smith Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org My apologies for the scad of these in a row; I'm doing my mail while I lurk in airports, and it hasn't been fun, I tell you. > Hmm! Also, consider this from my dmesg: > [..] > Preloaded elf kernel "kernel" at 0xc02c8000. > Pentium Pro MTRR support enabled, default memory type is uncacheable > Probing for PnP devices: > [..] > > Memory type is uncacheable?!? Is that saying what it sounds like? Yes, the default memory type is uncacheable. There should be a variable range then set by the BIOS that covers all physical memory; you can look with "memcontrol list". > (There is no MTRR synchronization like there was before. Previously the > BSP would dump all it's MTRR registers to a table and all the other AP > cpus would load that table on startup. That table doesn't exist anymore.) Hmm. It's quite likely that the BIOS is only setting the MTRRs in the BSP; why aren't the APs doing this anymore? -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message