Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750891AbWJ0X1u (ORCPT ); Fri, 27 Oct 2006 19:27:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750897AbWJ0X1u (ORCPT ); Fri, 27 Oct 2006 19:27:50 -0400 Received: from anchor-post-35.mail.demon.net ([194.217.242.85]:57351 "EHLO anchor-post-35.mail.demon.net") by vger.kernel.org with ESMTP id S1750891AbWJ0X1t (ORCPT ); Fri, 27 Oct 2006 19:27:49 -0400 Message-ID: <454295F4.1050001@superbug.co.uk> Date: Sat, 28 Oct 2006 00:27:48 +0100 From: James Courtier-Dutton User-Agent: Thunderbird 1.5.0.7 (X11/20061020) MIME-Version: 1.0 To: Linux Kernel Mailing List Subject: Latency measurements Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 557 Lines: 15 Hi, If I have an application using poll() to wait for an event, and that event it triggered by an interrupt handling routine in the kernel. E.g. DMA transaction completed. Is there any way for me to measure the latency between the kernel interrupt, and my application returning from the poll() call? James - 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/