From owner-freebsd-ppc@FreeBSD.ORG Thu Jul 25 00:16:24 2013 Return-Path: Delivered-To: freebsd-ppc@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 22149A6C; Thu, 25 Jul 2013 00:16:24 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-wg0-x234.google.com (mail-wg0-x234.google.com [IPv6:2a00:1450:400c:c00::234]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 5CAD722C2; Thu, 25 Jul 2013 00:16:23 +0000 (UTC) Received: by mail-wg0-f52.google.com with SMTP id b13so1046363wgh.7 for ; Wed, 24 Jul 2013 17:16:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=TzexVlQiR9mG3cTHzwSuiuEJNw3quhMjW8dJ5xYCjPg=; b=CTqBdsTRgSFLZzEX/jdbvhIPpZUZskhTB7fVQVBozWf+b+xZR+1Fic3CRMENsDzW2u sljRdO6r6EtdzjcYCJVZ5ZKzbnviRuXbCJ3kYXWLTqIF816i1LaiiCxlaq9GvYJrUFML HQBNWs8j3FOELLqT4zijxDH84YEIVkVkQmHKhXI7iiM8/jCS21gJwRnjd/DUfEL6YsYX Ec9P8tRR9LWXXXs4pop/uzzF/M6bgL2+X6GL/T2mu4GfGwYDK9Q2kTaybhbZKU0C5JNO pYfXjy316JelmhhUwovwgOb+30DOhHFpSIQiuTgIFiKIr/fFm3mHJBdf4Im+69tnY4ww X3bw== MIME-Version: 1.0 X-Received: by 10.194.92.6 with SMTP id ci6mr4577182wjb.79.1374711381631; Wed, 24 Jul 2013 17:16:21 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.217.94.132 with HTTP; Wed, 24 Jul 2013 17:16:21 -0700 (PDT) In-Reply-To: References: Date: Wed, 24 Jul 2013 17:16:21 -0700 X-Google-Sender-Auth: fsisARJh9DVWyxUH3IDFNYPF6pA Message-ID: Subject: Re: Kern.hz= +1 hertz at anything 2500 and above. From: Adrian Chadd To: Super Bisquit Content-Type: text/plain; charset=ISO-8859-1 Cc: FreeBSD Hackers , freebsd-current , FreeBSD PowerPC ML X-BeenThere: freebsd-ppc@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Porting FreeBSD to the PowerPC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Jul 2013 00:16:24 -0000 Well, why is it reducing latency? That's the thing you should investigate. Is it because processes aren't getting enough time? or too much time? Or the audio device isn't getting enough time to run? etc. -adrian On 24 July 2013 15:35, Super Bisquit wrote: > http://lists.freebsd.org/pipermail/freebsd-stable/2009-September/051789.html > > This is the thread that I was referring to earlier. Since the patch is for > 2009, what are the chances it would work with 10.x or 9.x? > > On PowerPC machines with a low MHz rate- or any machine with a CPU rate of > 800 MHz or less- increasing the kern.hz improves performance and cuts down > on latency. I am building audio applications and suites that are used in > different projects. A G3 based machine should be able to run a kernel with > kern.hz=5000 with no problem. Unfortunately, this cannot be done. > > @PowerPC: some of you may find that performance does increase at a higher > kern.hz rate. > > @Hackers & Current: What's the chance that the default rate limit can be > raised to 5k? > _______________________________________________ > freebsd-ppc@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-ppc > To unsubscribe, send any mail to "freebsd-ppc-unsubscribe@freebsd.org"