Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752877AbaFMPRT (ORCPT ); Fri, 13 Jun 2014 11:17:19 -0400 Received: from mga01.intel.com ([192.55.52.88]:34908 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750901AbaFMPRS (ORCPT ); Fri, 13 Jun 2014 11:17:18 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,471,1400050800"; d="scan'208";a="555124401" Date: Fri, 13 Jun 2014 09:16:41 -0600 (MDT) From: Keith Busch X-X-Sender: vmware@localhost.localdom To: Jens Axboe cc: Keith Busch , =?ISO-8859-15?Q?Matias_Bj=F8rling?= , Matthew Wilcox , "sbradshaw@micron.com" , "tom.leiming@gmail.com" , "hch@infradead.org" , "linux-kernel@vger.kernel.org" , "linux-nvme@lists.infradead.org" Subject: Re: [PATCH v7] NVMe: conversion to blk-mq In-Reply-To: <539B14A9.8010204@fb.com> Message-ID: References: <1402392038-5268-2-git-send-email-m@bjorling.me> <5397636F.9050209@fb.com> <5397753B.2020009@fb.com> <20140610213333.GA10055@linux.intel.com> <539889DC.7090704@fb.com> <20140611170917.GA12025@linux.intel.com> <5399BA00.7000705@bjorling.me> <539B05A1.7080700@fb.com> <539B14A9.8010204@fb.com> User-Agent: Alpine 2.03 (LRH 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 13 Jun 2014, Jens Axboe wrote: > On 06/13/2014 09:05 AM, Keith Busch wrote: >> Here are the performance drops observed with blk-mq with the existing >> driver as baseline: >> >> CPU : Drop >> ....:..... >> 0 : -6% >> 8 : -36% >> 16 : -12% > > We need the hints back for sure, I'll run some of the same tests and > verify to be sure. Out of curiousity, what is the topology like on your > box? Are 0/1 siblings, and 0..7 one node? 0-7 are different cores on node 0, with 16-23 being their thread siblings. Similiar setup with 8-15 and 24-32 on node 1. -- 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/