From mboxrd@z Thu Jan 1 00:00:00 1970 From: Evgeniy Polyakov Subject: Re: Fwd: Packet mmap: TX RING and zero copy Date: Mon, 8 Sep 2008 19:28:35 +0400 Message-ID: <20080908152835.GA16834@2ka.mipt.ru> References: <20080905141911.GA16586@2ka.mipt.ru> <7e0dd21a0809050745w692328b7v6dd4e0adf59e9535@mail.gmail.com> <20080905145902.GA12762@2ka.mipt.ru> <7e0dd21a0809050830o7c1dcc2do68da5df9900fcfe8@mail.gmail.com> <20080905153811.GA3596@2ka.mipt.ru> <7e0dd21a0809050901q23d0b16xa1a9d0df2f36f6d8@mail.gmail.com> <20080905163446.GB10078@2ka.mipt.ru> <7e0dd21a0809080321p6b9e2bc7m73e2cdd57a8d58b8@mail.gmail.com> <20080908112629.GA26488@2ka.mipt.ru> <7e0dd21a0809080601lc250197wde17733522d03125@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org To: Johann Baudy Return-path: Received: from relay.2ka.mipt.ru ([194.85.80.65]:45881 "EHLO 2ka.mipt.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752706AbYIHP3G (ORCPT ); Mon, 8 Sep 2008 11:29:06 -0400 Content-Disposition: inline In-Reply-To: <7e0dd21a0809080601lc250197wde17733522d03125@mail.gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: Hi Johann. On Mon, Sep 08, 2008 at 03:01:04PM +0200, Johann Baudy (johaahn@gmail.com) wrote: > > Are you sure that it is udp_push_pending_frames() and not some splice > > waiting? > > > No, I'm not sure. > Are there any queue or allocator limits that can slow the bitrate > through this function? No. > I mean something that will need end of transfer to start a new one. No, there shuld not be any such code path. What is CPU usage on sender when it sends data via UDP sendfile()? -- Evgeniy Polyakov