Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264124AbTEGRYG (ORCPT ); Wed, 7 May 2003 13:24:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264130AbTEGRYG (ORCPT ); Wed, 7 May 2003 13:24:06 -0400 Received: from ns.virtualhost.dk ([195.184.98.160]:62688 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S264124AbTEGRYF (ORCPT ); Wed, 7 May 2003 13:24:05 -0400 Date: Wed, 7 May 2003 19:36:37 +0200 From: Jens Axboe To: markw@osdl.org Cc: akpm@digeo.com, linux-kernel@vger.kernel.org, wli@holomorphy.com, Mark Haverkamp Subject: Re: OSDL DBT-2 AS vs. Deadline 2.5.68-mm2 Message-ID: <20030507173637.GQ823@suse.de> References: <20030507164728.GO823@suse.de> <200305071659.h47GxmW22250@mail.osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200305071659.h47GxmW22250@mail.osdl.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2229 Lines: 45 On Wed, May 07 2003, markw@osdl.org wrote: > On 7 May, Jens Axboe wrote: > > On Wed, May 07 2003, markw@osdl.org wrote: > >> I've collected some data from STP to see if it's useful or if there's > >> anything else that would be useful to collect. I've got some tests > >> queued up for the newer patches, but I wanted to put out what I had so > >> far. > >> > >> > >> METRICS OVER LAST 20 MINUTES: > >> --------------- -------- ----- ---- -------- ----------------------------------- > >> Kernel Elevator NOTPM CPU% Blocks/s URL > >> --------------- -------- ----- ---- -------- ----------------------------------- > >> 2.5.68-mm2 as 1155 94.3 8940.2 http://khack.osdl.org/stp/271356/ > >> 2.5.68-mm2 deadline 1255 94.9 9598.7 http://khack.osdl.org/stp/271359/ > >> > >> FUNCTIONS SORTED BY TICKS: > >> -- ------------------------- ------- ------------------------- ------- > >> # as 2.5.68-mm2 ticks deadline 2.5.68-mm2 ticks > >> -- ------------------------- ------- ------------------------- ------- > >> 1 default_idle 6103428 default_idle 5359025 > >> 2 bounce_copy_vec 86272 bounce_copy_vec 97696 > >> 3 schedule 63819 schedule 70114 > >> 4 __make_request 30397 __blk_queue_bounce 31167 > >> 5 __blk_queue_bounce 26962 scsi_request_fn 26623 > >> 6 scsi_request_fn 24845 __make_request 25012 > > > > uhh nasty, you are spending a lot of time bouncing. How much RAM is in > > the machine, and what is the scsi hba? > > The system has 4GB of memory and has a DECchip 21554 (aacraid) that the > external drives are connected to. Mark Haverkamp is currently trying to > address those bounce buffers. aacraid actually looks sane enough. so you should just be able to set host->highmem_io and it should work. -- Jens Axboe - 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/