From mboxrd@z Thu Jan 1 00:00:00 1970 From: alekcejk@googlemail.com Subject: Re: Re: Re: Re: Re: Re: Re: limited network bandwidth with 3.2.x kernels Date: Wed, 15 Feb 2012 15:43:38 +0200 Message-ID: <1562329.32T3W12WZD@localhost.localdomain> References: <8633039.fHPLx6GNq3@localhost.localdomain> <1329280993.2555.21.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Transfer-Encoding: QUOTED-PRINTABLE To: netdev@vger.kernel.org Return-path: Received: from mail-bk0-f46.google.com ([209.85.214.46]:61385 "EHLO mail-bk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754566Ab2BONod convert rfc822-to-8bit (ORCPT ); Wed, 15 Feb 2012 08:44:33 -0500 Received: by mail-bk0-f46.google.com with SMTP id jm19so927135bkc.19 for ; Wed, 15 Feb 2012 05:44:33 -0800 (PST) In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: =F7 =D3=CF=CF=C2=DD=C5=CE=C9=C9 =CF=D4 =F3=D2=C5=C4=C1 15 =C6=C5=D7=D2=C1= =CC=D1 2012 01:03:46 =D7=D9 =CE=C1=D0=C9=D3=C1=CC=C9: > There are some potentially interesting differences in sysctl values: > > diff -u /tmp/sysctl-a-3.1.txt /tmp/sysctl-a-3.2.txt | grep mem_def >=20 > -net.core.wmem_default =3D 114688 > -net.core.rmem_default =3D 114688 > +net.core.wmem_default =3D 163840 > +net.core.rmem_default =3D 163840 >=20 > Can you please try running this as root on the 3.2 kernel and then se= e > what sort of performance you get: >=20 > sysctl net.core.rmem_default=3D114688 >=20 > This should make the 3.2 config closer to the 3.1 config. Should be > interesting to see if the behavior is more similar when that happens. >=20 > neal Nothing changed with download speed after I set net.core.wmem_default =3D= 114688=20 and net.core.rmem_default =3D 114688.