Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932623AbaDVOD1 (ORCPT ); Tue, 22 Apr 2014 10:03:27 -0400 Received: from mail-pd0-f173.google.com ([209.85.192.173]:55336 "EHLO mail-pd0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932335AbaDVODR (ORCPT ); Tue, 22 Apr 2014 10:03:17 -0400 Message-ID: <535676A1.3070706@kernel.dk> Date: Tue, 22 Apr 2014 08:03:13 -0600 From: Jens Axboe User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: Alexander Gordeev , linux-kernel@vger.kernel.org CC: Kent Overstreet , Shaohua Li , Nicholas Bellinger , Ingo Molnar , Peter Zijlstra Subject: Re: [PATCH RFC 0/2] percpu_ida: Take into account CPU topology when stealing tags References: <20140422071057.GA13195@dhcp-26-169.brq.redhat.com> In-Reply-To: <20140422071057.GA13195@dhcp-26-169.brq.redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2014-04-22 01:10, Alexander Gordeev wrote: > On Wed, Mar 26, 2014 at 02:34:22PM +0100, Alexander Gordeev wrote: >> But other systems (more dense?) showed increased cache-hit rate >> up to 20%, i.e. this one: > > Hello Gentlemen, > > Any feedback on this? Sorry for dropping the ball on this. Improvements wrt when to steal, how much, and from whom are sorely needed in percpu_ida. I'll do a bench with this on a system that currently falls apart with it. -- 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/