From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: inaccurate packet scheduling Date: Tue, 18 Dec 2012 08:51:43 -0800 Message-ID: <1355849503.9380.37.camel@edumazet-glaptop> References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Jiri Pirko , jhs@mojatatu.com, davem@davemloft.net, edumazet@google.com, tgraf@suug.ch, netdev@vger.kernel.org To: Stephen Hemminger Return-path: Received: from mail-pa0-f53.google.com ([209.85.220.53]:55942 "EHLO mail-pa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932097Ab2LRQvz (ORCPT ); Tue, 18 Dec 2012 11:51:55 -0500 Received: by mail-pa0-f53.google.com with SMTP id hz1so662511pad.26 for ; Tue, 18 Dec 2012 08:51:54 -0800 (PST) In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On Tue, 2012-12-18 at 08:26 -0800, Stephen Hemminger wrote: > Check kernel log for messages about clock. It could be that on the > machines with issues TSC is not usable for kernel clock. > Also turn off TSO since it screws up any form of rate control. Yes, but we should fix it eventually. I'll take a look.