From owner-freebsd-current@FreeBSD.ORG Wed Jun 8 13:57:53 2005 Return-Path: X-Original-To: current@freebsd.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 033B516A41C for ; Wed, 8 Jun 2005 13:57:53 +0000 (GMT) (envelope-from jroberson@chesapeake.net) Received: from mail.chesapeake.net (chesapeake.net [208.142.252.6]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8DA0A43D49 for ; Wed, 8 Jun 2005 13:57:52 +0000 (GMT) (envelope-from jroberson@chesapeake.net) Received: from mail.chesapeake.net (localhost [127.0.0.1]) by mail.chesapeake.net (8.12.10/8.12.10) with ESMTP id j58Dvpk9017094; Wed, 8 Jun 2005 09:57:51 -0400 (EDT) (envelope-from jroberson@chesapeake.net) Received: from localhost (jroberson@localhost) by mail.chesapeake.net (8.12.10/8.12.10/Submit) with ESMTP id j58DvlSp017051; Wed, 8 Jun 2005 09:57:51 -0400 (EDT) (envelope-from jroberson@chesapeake.net) X-Authentication-Warning: mail.chesapeake.net: jroberson owned process doing -bs Date: Wed, 8 Jun 2005 09:57:46 -0400 (EDT) From: Jeff Roberson To: Pyun YongHyeon In-Reply-To: <20050608061532.GA5805@rndsoft.co.kr> Message-ID: <20050608095726.F16943@mail.chesapeake.net> References: <20050607210453.S16943@mail.chesapeake.net> <20050608061532.GA5805@rndsoft.co.kr> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: current@freebsd.org Subject: Re: Sound skipping problems X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Jun 2005 13:57:53 -0000 On Wed, 8 Jun 2005, Pyun YongHyeon wrote: > On Tue, Jun 07, 2005 at 11:32:12PM -0400, Jeff Roberson wrote: > > I have a patch that should greatly improve the sound skipping problems > > people have under heavy io load. Several people sent me traces that > > showed the buf daemon running for hundreds of milliseconds with Giant > > held, which can hold up the pcm code. The patch is available at: > > > > http://www.chesapeake.net/~jroberson/flushbuf.diff > > > > This changes flushbufqueues to flush multiple buffers instead of one > > buffer at a time. It also places buffers we failed to flush at the end of > > the list, and uses a sentinal to track our progress through the list. > > This almost entirely solved the skipping problem for me. Depending on > > user feedback we can do a little more to reduce the time spent processing > > here. > > > > Unfortunatly, it seems that it doesn't show much difference. > HW: Gateway Solo 5300(UP, P3 700MHz, maestro3 driver) > > As soon as I started to extract mozilla source the sound playing > stopped and the system seems to be freezed. > (No response from keyboard input except showing ^C.) > It seems that there is no difference with/without witness. I added an extra yield to the buf daemon. Try the new patch and see if it makes a difference. > -- > Regards, > Pyun YongHyeon > http://www.kr.freebsd.org/~yongari | yongari@freebsd.org >