From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: [patch/rfc/rft] sd: allocate request_queue on device's local numa node Date: Mon, 22 Oct 2012 21:19:41 +0200 Message-ID: <50859C4D.7050309@kernel.dk> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Jeff Moyer Cc: linux-kernel@vger.kernel.org, SCSI Mailing List List-Id: linux-scsi@vger.kernel.org On 2012-10-22 21:01, Jeff Moyer wrote: > Hi, > > All of the infrastructure is available to allocate a request_queue on a > particular numa node, but it isn't being utilized at all. Wire up the > sd driver to allocate the request_queue on the HBA's local numa node. > > This is a request for comments and testing (I've built and booted it, > nothing more). I believe that this should be a performance win, but I > have no numbers to back it up as yet. Suggestions for workloads to test > are welcome. Would seem pointless _not_ to do it, if we have the info. Some scsi_debug non-delay fio microbenchmark should show it easily. Combine with perf as needed to verify. -- Jens Axboe