From owner-cvs-all@FreeBSD.ORG  Tue Oct 19 02:39:27 2004
Return-Path: <owner-cvs-all@FreeBSD.ORG>
Delivered-To: cvs-all@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id EDFE616A4CE; Tue, 19 Oct 2004 02:39:27 +0000 (GMT)
Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id CDAB343D45; Tue, 19 Oct 2004 02:39:27 +0000 (GMT)
	(envelope-from scottl@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.12.11/8.12.11) with ESMTP id i9J2dR88029844;
	Tue, 19 Oct 2004 02:39:27 GMT
	(envelope-from scottl@repoman.freebsd.org)
Received: (from scottl@localhost)
	by repoman.freebsd.org (8.12.11/8.12.11/Submit) id i9J2dRF8029843;
	Tue, 19 Oct 2004 02:39:27 GMT
	(envelope-from scottl)
Message-Id: <200410190239.i9J2dRF8029843@repoman.freebsd.org>
From: Scott Long <scottl@FreeBSD.org>
Date: Tue, 19 Oct 2004 02:39:27 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
	cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/dev/em if_em.c
X-BeenThere: cvs-all@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the entire tree <cvs-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-all>
List-Post: <mailto:cvs-all@freebsd.org>
List-Help: <mailto:cvs-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 19 Oct 2004 02:39:28 -0000

scottl      2004-10-19 02:39:27 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/em           if_em.c 
  Log:
  Use an alignment of 1 instead of PAGE_SIZE for the rx and tx buffer tags.
  Since the e1000 DMA engines hava no constraints on the alignment of buffer
  transfers, there is no reason to tell busdma that there is.  This save a
  minimum of 1 malloc call per packet, which translates to eliminating 4 locks.
  It also means that buffers are not needlessly bounced when transfered.  The
  end result is a 38% improvement in pps in a 4 way bridging environment.
  
  Obtained from: Sandvine, Inc.
  
  Revision  Changes    Path
  1.48      +2 -12     src/sys/dev/em/if_em.c