From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: How to determine performance bottleneck? Date: Wed, 15 Oct 2008 02:19:25 +0900 Message-ID: <48F4D49D.3050602@kernel.org> References: <20081013202836.3fc62c3e@mjolnir.drzeus.cx> <48F3D8E2.8000006@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:45352 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751309AbYJNRVy (ORCPT ); Tue, 14 Oct 2008 13:21:54 -0400 In-Reply-To: Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Grant Grundler Cc: Pierre Ossman , Jeff Garzik , linux-ide@vger.kernel.org Grant Grundler wrote: > On Mon, Oct 13, 2008 at 4:25 PM, Tejun Heo wrote: > ... >>> Tejun, what kind of throughput have you seen when you have been testing >>> the sil3132 and multipliers? >> That's the limit of sil3124/3132. Dunno why but you can't go over that. > > To be clear, I understood "that" == ~100 MB/s It's somewhere around that. I don't remember the exact number at the moment. >> There's 3132-2 chip on the market. Maybe it's worth a try? > > Are you possibly thinking of 3124-2 ? (4-port PCI-X device, not PCI-e) > > I didn't see mention of 3132-2 on > http://www.siliconimage.com/products/product.aspx?id=32 I asked SIMG about the issue and whether they have newer revisions which solve the issue. When I know more, I'll post it on the ata wiki page. Thanks. -- tejun