Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760720AbZDCXi5 (ORCPT ); Fri, 3 Apr 2009 19:38:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756559AbZDCXir (ORCPT ); Fri, 3 Apr 2009 19:38:47 -0400 Received: from mx2.redhat.com ([66.187.237.31]:44850 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756193AbZDCXiq (ORCPT ); Fri, 3 Apr 2009 19:38:46 -0400 Date: Fri, 3 Apr 2009 19:35:55 -0400 From: Dave Jones To: Linus Torvalds Cc: Jeff Garzik , Chris Mason , Andrew Morton , David Rees , Linux Kernel Mailing List Subject: Re: Linux 2.6.29 Message-ID: <20090403233555.GA24143@redhat.com> Mail-Followup-To: Dave Jones , Linus Torvalds , Jeff Garzik , Chris Mason , Andrew Morton , David Rees , Linux Kernel Mailing List References: <1238758370.32764.5.camel@think.oraclecorp.com> <49D66C0E.5090301@garzik.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 977 Lines: 21 On Fri, Apr 03, 2009 at 01:14:00PM -0700, Linus Torvalds wrote: > But I _think_ G.SKILL uses those horribly broken JMicron controllers. > Judging by your performance numbers, it's the slightly fancier double > controller version (ie basically an internal RAID0 of two identical > JMicron controllers, each handling half of the flash chips). > > Try a random write test. If it's the JMicron controllers, performance will > plummet to a few tens of kilobytes per second. I got the 64GB variant of Jeff's g-skill SSD. When I first got it, I ran aio-stress on it. The numbers from the smaller blocksize tests are pitiful. To the extent that after running for 24hrs, I ctrl-c'd the test. Really, really abysmal. Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/