From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 27 May 2002 12:30:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 27 May 2002 12:30:07 -0400 Received: from mx6.mail.ru ([194.67.57.16]:26117 "EHLO mx6.mail.ru") by vger.kernel.org with ESMTP id ; Mon, 27 May 2002 12:30:06 -0400 From: "Muthal Sangam" To: linux-kernel@vger.kernel.org Subject: interrupt latency/700microsecs Mime-Version: 1.0 X-Mailer: mPOP Web-Mail 2.19 X-Originating-IP: 144.16.67.155 via proxy [144.16.67.8] Date: Mon, 27 May 2002 20:30:06 +0400 Reply-To: "Muthal Sangam" Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Message-Id: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On kernel 2.4.7, AMDK6 @ 450MHz processor, is it possible to get latency fluctuations of upto 700microsecs for running the timer interrupt, due to interrupts being disabled ? I am using the time stamp counter and reading it at the start of the timer interrupt and measuring the cycles elapsed between two inovocations of it. The number of cycles elapsed is ~4500225, but sometimes it increases to as high as 4848032. Can i conclude that this difference is due to interrupts being disabled in critical sections ? ( I think i am making some mistake :-) - sangam