From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S932324Ab1JCSD5 (ORCPT <rfc822;w@1wt.eu>);
	Mon, 3 Oct 2011 14:03:57 -0400
Received: from mx.binnacle.cx ([74.95.187.105]:29736 "EHLO mx.binnacle.cx"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S932263Ab1JCSDv (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Mon, 3 Oct 2011 14:03:51 -0400
Message-Id: <6.2.5.6.2.20111003140010.05a70ed0@binnacle.cx>
X-Mailer: QUALCOMM Windows Eudora Version 6.2.5.6
Date: Mon, 03 Oct 2011 14:02:35 -0400
To: Eric Dumazet <eric.dumazet@gmail.com>
From: starlight@binnacle.cx
Subject: Re: big picture UDP/IP performance question re 2.6.18
  -> 2.6.32
Cc: linux-kernel@vger.kernel.org, netdev <netdev@vger.kernel.org>,
        Willy Tarreau <w@1wt.eu>, Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Stephen Hemminger <stephen.hemminger@vyatta.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

At 06:16 PM 10/3/2011 +0200, Eric Dumazet wrote:
>
>It seems you use 4096 2MB hugepages, and your
>machine has 1GB pages availabe, you could
>try to use them.
>
>(boot cmd : hugepagesz=1GB hugepages=8 )

Tried it and got errno 12 on the segment
allocations.  None were allocated, though
the count is six and the largest is exactly
1GB.  Don't have time to dig into it.