From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264314AbTL3BBv (ORCPT ); Mon, 29 Dec 2003 20:01:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264315AbTL3BBv (ORCPT ); Mon, 29 Dec 2003 20:01:51 -0500 Received: from hell.sks3.muni.cz ([147.251.210.31]:25031 "EHLO hell.sks3.muni.cz") by vger.kernel.org with ESMTP id S264314AbTL3BBt (ORCPT ); Mon, 29 Dec 2003 20:01:49 -0500 Date: Tue, 30 Dec 2003 02:01:45 +0100 From: Lukas Hejtmanek To: Peter Osterlund Cc: linux-kernel@vger.kernel.org Subject: Re: ACPI problems (was: Re: Synaptics PS/2 driver and 2.6.0-test11) Message-ID: <20031230010145.GM916@mail.muni.cz> References: <20031229215913.GH916@mail.muni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-echelon: NSA, CIA, CI5, MI5, FBI, KGB, BIS, Plutonium, Bin Laden, bomb User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 30, 2003 at 01:37:11AM +0100, Peter Osterlund wrote: > That's normal. The hardware generates 80 packets/second and it keeps > generating packets 1 second after you stop using the touchpad. Each > packet is 6 bytes and the i8042 controller generates one > interrupt/byte. > > 500 interrupts/s shouldn't be any problem to handle though. Well it depends. If ACPI disables interrupts or it keeps some spin lock then there is a high probability that some interrupts are lost. If I do (with no load nor i/o stress): # time cat /proc/acpi/battery/BAT0/state present: yes capacity state: ok charging state: unknown present rate: unknown remaining capacity: 4000 mAh present voltage: 14800 mV real 0m1.118s user 0m0.001s sys 0m0.007s However for me it looks odd that sound is not corrupted (and I believe that dma buffer does not hold 1 sec of sound data) while serio and soft modem is. -- Lukáš Hejtmánek