From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755723Ab3FGOaf (ORCPT ); Fri, 7 Jun 2013 10:30:35 -0400 Received: from mail-pb0-f43.google.com ([209.85.160.43]:62470 "EHLO mail-pb0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753333Ab3FGOaX (ORCPT ); Fri, 7 Jun 2013 10:30:23 -0400 Message-ID: <1370615420.24311.425.camel@edumazet-glaptop> Subject: RE: Scaling problem with a lot of AF_PACKET sockets on different interfaces From: Eric Dumazet To: David Laight Cc: Mike Galbraith , "Vitaly V. Bursov" , linux-kernel@vger.kernel.org, netdev Date: Fri, 07 Jun 2013 07:30:20 -0700 In-Reply-To: References: <51B1CA50.30702@telenet.dn.ua> <1370608871.5854.64.camel@marge.simpson.net> <1370613289.24311.419.camel@edumazet-glaptop> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2013-06-07 at 15:09 +0100, David Laight wrote: > > > Looks like the ptype_base[] should be per 'dev'? > > > Or just put entries where ptype->dev != null_or_dev on a per-interface > > > list and do two searches? > > > > Yes, but then we would have two searches instead of one in fast path. > > Usually it would be empty - so the search would be very quick! quick + quick + quick + quick + quick == not so quick ;) Plus adding another code for /proc/net/packet Plus adding the xmit side (AF_PACKET captures receive and xmit)