Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S272232AbTGYRqh (ORCPT ); Fri, 25 Jul 2003 13:46:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S272235AbTGYRqh (ORCPT ); Fri, 25 Jul 2003 13:46:37 -0400 Received: from fw.osdl.org ([65.172.181.6]:38093 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S272232AbTGYRqa (ORCPT ); Fri, 25 Jul 2003 13:46:30 -0400 Date: Fri, 25 Jul 2003 10:58:18 -0700 From: "Randy.Dunlap" To: Jeff Sipek Cc: vda@port.imtp.ilyichevsk.odessa.ua, ecki-lkm@lina.inka.de, linux-kernel@vger.kernel.org Subject: Re: Net device byte statistics Message-Id: <20030725105818.6bc97653.rddunlap@osdl.org> In-Reply-To: <200307251355.22161.jeffpc@optonline.net> References: <200307251223.51849.jeffpc@optonline.net> <20030725102043.724f4a3b.rddunlap@osdl.org> <200307251355.22161.jeffpc@optonline.net> Organization: OSDL X-Mailer: Sylpheed version 0.8.11 (GTK+ 1.2.10; i586-pc-linux-gnu) X-Face: +5V?h'hZQPB9kW Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2087 Lines: 52 On Fri, 25 Jul 2003 13:55:14 -0400 Jeff Sipek wrote: | -----BEGIN PGP SIGNED MESSAGE----- | Hash: SHA1 | | On Friday 25 July 2003 13:20, Randy.Dunlap wrote: | > Yes, a common solution for this is to use some SNMP agent that does | > 64-bit counter accumulation. | | Interesting...I haven't thought of SNMP. | | > IETF expects that some high-speed interfaces will have 64-bit | > counters. From RFC 2233 (Interfaces Group MIB using SMIv2): | > | > | > For interfaces that operate at 20,000,000 (20 million) bits per | > second or less, 32-bit byte and packet counters MUST be used. | > For interfaces that operate faster than 20,000,000 bits/second, | > and slower than 650,000,000 bits/second, 32-bit packet counters | > MUST be used and 64-bit octet counters MUST be used. For | > interfaces that operate at 650,000,000 bits/second or faster, | > 64-bit packet counters AND 64-bit octet counters MUST be used. | > | | It is just easier to have everything 64-bits. I think the counterpoint is that if it were easy & safe, it would already be in the kernel. | > However, this is a MIB spec. It does not require a Linux | > (/proc) interface to support 64-bit counters. | | Agreed, however if we are going to change some counters, we should do it for | all of them. (Btw, /proc is not the only point where users can get stats.... | there is also /sys and something else...I can't remember now...) Right, I was just saying that the kernel interface doesn't have to support 64-bit counters in lots of cases. That can often be done in userspace. -- ~Randy | http://developer.osdl.org/rddunlap/ | http://www.xenotime.net/linux/ | For Linux-2.6: http://www.codemonkey.org.uk/post-halloween-2.5.txt or http://lwn.net/Articles/39901/ http://www.kernel.org/pub/linux/kernel/people/rusty/modules/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/