From owner-freebsd-stable Wed Sep 4 14:20:25 2002 Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E15FC37B401 for ; Wed, 4 Sep 2002 14:20:16 -0700 (PDT) Received: from host217-41-4-70.in-addr.btopenworld.com (host217-41-4-70.in-addr.btopenworld.com [217.41.4.70]) by mx1.FreeBSD.org (Postfix) with ESMTP id AE73243E4A for ; Wed, 4 Sep 2002 14:20:15 -0700 (PDT) (envelope-from dom@host217-41-4-70.in-addr.btopenworld.com) Received: by host217-41-4-70.in-addr.btopenworld.com (Postfix, from userid 1001) id 6AA661EE; Wed, 4 Sep 2002 22:20:32 +0100 (BST) Date: Wed, 4 Sep 2002 22:20:32 +0100 From: Dominic Marks To: Mike Hoskins Cc: Charles Sprickman , stable@freebsd.org Subject: Re: interpreting netstat -m output Message-ID: <20020904212032.GA1688@gallium> References: <20020904134622.M51653-100000@fubar.adept.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20020904134622.M51653-100000@fubar.adept.org> User-Agent: Mutt/1.5.1i Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Wed, Sep 04, 2002 at 01:47:58PM -0700, Mike Hoskins wrote: > On Wed, 4 Sep 2002, Charles Sprickman wrote: > > What is the difference between the "mbufs in use" line and the "mbuf > > clusters in use" line? An mbuf is a fixed length structure which contains network data. An mbuf cluster is associated with an area of memory which is used for storing more data than you can fit in a single mbuf. According the D&I 4.4 an mbuf is 128 bytes and (not all of this is available for data storage), an mbuf cluster varies in size, but defaults to 1024 bytes (but according to the book this may be different depending on CPU architecture). > I've wondered precisely this; perhaps one specifically relates to the > network? The farthest I got was netstat(1), which points to a nonexistant > mbuf(9). > > Later, > -Mike Hey Mike :-) > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message -- Dominic Marks Computer & Politics Geek [work]::[npl.co.uk] << dominic.marks at npl.co.uk >> [educ]::[umist.ac.uk] << notyet-known at umist.ac.uk >> [home]::[btinternet] << dominic_marks at btinternet.com >> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message