From owner-svn-src-all@FreeBSD.ORG  Thu Apr 22 20:25:07 2010
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id C1844106564A;
	Thu, 22 Apr 2010 20:25:07 +0000 (UTC)
	(envelope-from yongari@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id AFC148FC0A;
	Thu, 22 Apr 2010 20:25:07 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o3MKP74r082408;
	Thu, 22 Apr 2010 20:25:07 GMT (envelope-from yongari@svn.freebsd.org)
Received: (from yongari@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id o3MKP7im082406;
	Thu, 22 Apr 2010 20:25:07 GMT (envelope-from yongari@svn.freebsd.org)
Message-Id: <201004222025.o3MKP7im082406@svn.freebsd.org>
From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Thu, 22 Apr 2010 20:25:07 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r207071 - head/sys/dev/sge
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 22 Apr 2010 20:25:07 -0000

Author: yongari
Date: Thu Apr 22 20:25:07 2010
New Revision: 207071
URL: http://svn.freebsd.org/changeset/base/207071

Log:
  Intialize interrupt moderation control register. The magic value
  was chosen by lots of trial and errors. The chosen value shows
  good interrupt moderation without additional latency.
  Without this change, controller can generate more than 140k
  interrupts per second under high network load.
  
  Submitted by:	xclin <xclin <> cs dot nctu dot edu dot tw >

Modified:
  head/sys/dev/sge/if_sge.c

Modified: head/sys/dev/sge/if_sge.c
==============================================================================
--- head/sys/dev/sge/if_sge.c	Thu Apr 22 19:18:10 2010	(r207070)
+++ head/sys/dev/sge/if_sge.c	Thu Apr 22 20:25:07 2010	(r207071)
@@ -1551,10 +1551,13 @@ sge_init_locked(struct sge_softc *sc)
 	/*
 	 * XXX Try to mitigate interrupts.
 	 */
+	CSR_WRITE_4(sc, IntrControl, 0x08880000);
+#ifdef notyet
 	if (sc->sge_intrcontrol != 0)
 		CSR_WRITE_4(sc, IntrControl, sc->sge_intrcontrol);
 	if (sc->sge_intrtimer != 0)
 		CSR_WRITE_4(sc, IntrTimer, sc->sge_intrtimer);
+#endif
 
 	/*
 	 * Clear and enable interrupts.