From owner-freebsd-current@FreeBSD.ORG Tue Nov 16 07:27:29 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2F0E316A4CE for ; Tue, 16 Nov 2004 07:27:29 +0000 (GMT) Received: from digger1.defence.gov.au (digger1.defence.gov.au [203.5.217.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1967F43D1F for ; Tue, 16 Nov 2004 07:27:28 +0000 (GMT) (envelope-from wilkinsa@squash.dsto.defence.gov.au) Received: from ednmsw503.dsto.defence.gov.au (ednmsw503.dsto.defence.gov.au [131.185.2.150]) by digger1.defence.gov.au with ESMTP id iAG7QSZg021616 for ; Tue, 16 Nov 2004 17:56:28 +1030 (CST) Received: from muttley.dsto.defence.gov.au (unverified) by ednmsw503.dsto.defence.gov.au (Content Technologies SMTPRS 4.3.10) with ESMTP id for ; Tue, 16 Nov 2004 17:57:16 +1030 Received: from ednex501.dsto.defence.gov.au (ednex501.dsto.defence.gov.au [131.185.2.81]) by muttley.dsto.defence.gov.au (8.11.3/8.11.3) with ESMTP id iAG7KCh20802 for ; Tue, 16 Nov 2004 17:50:12 +1030 (CST) Received: from squash.dsto.defence.gov.au ([131.185.40.212]) by ednex501.dsto.defence.gov.au with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2653.13) id RZJDN2HA; Tue, 16 Nov 2004 17:50:05 +1030 Received: from squash.dsto.defence.gov.au (localhost [127.0.0.1]) by squash.dsto.defence.gov.au (8.12.11/8.12.11) with ESMTP id iAG7L14c058669 for ; Tue, 16 Nov 2004 17:51:01 +1030 (CST) (envelope-from wilkinsa@squash.dsto.defence.gov.au) Received: (from wilkinsa@localhost) by squash.dsto.defence.gov.au (8.12.11/8.12.11/Submit) id iAG7L1eA058668 for freebsd-current@freebsd.org; Tue, 16 Nov 2004 17:51:01 +1030 (CST) (envelope-from wilkinsa) Date: Tue, 16 Nov 2004 17:51:01 +1030 From: "Wilkinson, Alex" To: freebsd-current@freebsd.org Message-ID: <20041116072101.GJ58198@squash.dsto.defence.gov.au> Mail-Followup-To: freebsd-current@freebsd.org References: <92d8c1ed0411150817395e10d0@mail.gmail.com> <200411151614.21983.jhb@FreeBSD.org> <20041116052336.GF57615@squash.dsto.defence.gov.au> <41999DF6.4000405@freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <41999DF6.4000405@freebsd.org> User-Agent: Mutt/1.5.6i Subject: Re: Warning: Pentium 4 CPU: PSE disabled X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Nov 2004 07:27:29 -0000 Thanks Scott, -aW 0n Mon, Nov 15, 2004 at 11:28:06PM -0700, Scott Long wrote: PSE allows you to map 4MB of memory into a single page table entry instead of just 4KB. This is good when you have a lot of data that operates in the same address space and doesn't need to be swapped out to disk. It's also more efficient for the CPU since only one TLB cache entry is needed for the 4MB chunk instead of 1024 4KB entries. Where this comes in really handy is with mapping the kernel onto a single 4MB PSE page, since you know that it will never be swapped out and you don't want to pollute the 4KB TLB cache with kernel page entries. So, consider it an optimization, but not a requirement for operation. Scott Wilkinson, Alex wrote: >John, what is the benefit of Page Size Extensions ? > > - aW > > 0n Mon, Nov 15, 2004 at 04:14:21PM -0500, John Baldwin wrote: > > On Monday 15 November 2004 11:17 am, Kaspars wrote: > > Hi all, > > > > I just installed new pc with FreeBSD 4.10 and updated to FreeBSD > > 4.10-RELEASE-p3 and found in dmesg: > > CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2411.60-MHz 686-class CPU) > > Origin = "GenuineIntel" Id = 0xf29 Stepping = 9 > > > Features=0xbfebfbff >A,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > > Hyperthreading: 2 logical CPUs > > real memory = 520028160 (507840K bytes) > > avail memory = 502751232 (490968K bytes) > > Preloaded elf kernel "kernel" at 0xc0329000. > > Warning: Pentium 4 CPU: PSE disabled > > Pentium Pro MTRR support enabled > > md0: Malloc disk > > > > Tryed to google, tryed in ircnet #freebsd but nobody can`t say what > > realy wrong :) > > There is a bug in how some of the Pentium4 chips handle PSE that 5.x > works around already. However, the fix was too large to backport to > 4.x, so instead the PSE feature is turned off in 4.x. I wouldn't > worry about it, your machine will still work fine without PSE. > > -- > John Baldwin <>< http://www.FreeBSD.org/~jhb/ > "Power Users Use the Power to Serve" = http://www.FreeBSD.org > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to > "freebsd-current-unsubscribe@freebsd.org" > >_______________________________________________ >freebsd-current@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-current >To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"