From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753257Ab0JMKmp (ORCPT ); Wed, 13 Oct 2010 06:42:45 -0400 Received: from mail-gy0-f174.google.com ([209.85.160.174]:47683 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752985Ab0JMKmn (ORCPT ); Wed, 13 Oct 2010 06:42:43 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:from:to:cc:in-reply-to:references:content-type:date :message-id:mime-version:x-mailer:content-transfer-encoding; b=sFWfZQxAqhPnMqiv9hd1z8of8wrfRhEHjJEu7IBwHQVWH9JfNdVResYMmHLzrC4ipq s1SZFs+dQfLXw6nqo3bk6AWyRnxGE97eaQ71xTwmpPFwc508eWz9l4Ob+Wi9Nm8ihCSn tbq0nXn4xg5MH6Gwg4/V03G74AYqxUV8A+rPE= Subject: Re: [PATCH 17/18] fs: icache remove inode_lock From: Eric Dumazet To: Nick Piggin Cc: Dave Chinner , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20101013072058.GA3121@amd> References: <1286515292-15882-1-git-send-email-david@fromorbit.com> <1286515292-15882-18-git-send-email-david@fromorbit.com> <20101013072058.GA3121@amd> Content-Type: text/plain; charset="UTF-8" Date: Wed, 13 Oct 2010 12:42:36 +0200 Message-ID: <1286966556.3876.261.camel@edumazet-laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Le mercredi 13 octobre 2010 à 18:20 +1100, Nick Piggin a écrit : > I don't think the patchset has suddenly become vastly more urgent > in the past month, so I think my approach of having it get a lot > of testing and go in Al's vfs tree for a while is best. > Hi Nick Not vastly urgent, but highly wanted on many workloads, even ones not really related to 'fs'... In current tree, a "close(socket())" needs 31 us on a 2x4x2 machine, instead of 1.45 us if single thread. But yes, I agree a lot of testing is needed :) -------------------------------------------------------------------------------------------- PerfTop: 16584 irqs/sec kernel:99.8% exact: 0.0% [1000Hz cycles], (all, 16 CPUs) -------------------------------------------------------------------------------------------- samples pcnt function DSO _______ _____ ________________________ _______ 101217.00 87.8% _raw_spin_lock vmlinux 1365.00 1.2% kmem_cache_alloc vmlinux 1220.00 1.1% d_alloc vmlinux 1159.00 1.0% sock_alloc_file vmlinux 881.00 0.8% __d_instantiate vmlinux 657.00 0.6% memset vmlinux 516.00 0.4% dput vmlinux 423.00 0.4% new_inode vmlinux 401.00 0.3% _atomic_dec_and_lock vmlinux 397.00 0.3% iput vmlinux 358.00 0.3% dentry_iput vmlinux 320.00 0.3% kmem_cache_free vmlinux 309.00 0.3% __slab_free vmlinux 297.00 0.3% __sk_free vmlinux 264.00 0.2% kmem_cache_alloc_notrace vmlinux 263.00 0.2% __call_rcu vmlinux Thanks