Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261242AbVDSPqN (ORCPT ); Tue, 19 Apr 2005 11:46:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261521AbVDSPqN (ORCPT ); Tue, 19 Apr 2005 11:46:13 -0400 Received: from wproxy.gmail.com ([64.233.184.202]:9900 "EHLO wproxy.gmail.com") by vger.kernel.org with ESMTP id S261242AbVDSPqL convert rfc822-to-8bit (ORCPT ); Tue, 19 Apr 2005 11:46:11 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=CmGeQthihE5TNe++AHOBAQuWm5mZ+naqQpN23gP/VNsQEfVOlrCEDncJeJ6h24erQokhsmVsO37pq3AEHQft3kRSRmJatc6fZ2Az7JnGOFJuZqXVjKcDeL+1AwNkiBXhvN8En4sbcTEjFG++IhoZ9Wa5ohTavaB8PVZ9x1T/k+o= Message-ID: <875fe4a505041908466117acf4@mail.gmail.com> Date: Tue, 19 Apr 2005 15:46:07 +0000 From: Francesco Oppedisano Reply-To: Francesco Oppedisano To: linux-kernel@vger.kernel.org Subject: more packets than interrupts Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 719 Lines: 18 Hi, using tcpdump to capture ethernet packets i noticed i obtain more packets than interrupts (taken from /proc/interrupts). I found this with all NICs available to me (8139, e1000pro, one using sk98lin, 3com 59x, via rhine etc..). Where the NIC supports any type of mitigation or similar (see NAPI), this function are disabled: so this happens with no mitigation mechanisms. How can this happen? Can every driver manage many packets per call? Thank you very much Francesco - 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/