From owner-freebsd-hackers@FreeBSD.ORG Sun Dec 26 13:25:06 2010 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 51F16106566B; Sun, 26 Dec 2010 13:25:06 +0000 (UTC) (envelope-from gleb.kurtsou@gmail.com) Received: from mail-ey0-f182.google.com (mail-ey0-f182.google.com [209.85.215.182]) by mx1.freebsd.org (Postfix) with ESMTP id A62F48FC1B; Sun, 26 Dec 2010 13:25:05 +0000 (UTC) Received: by eyf6 with SMTP id 6so3870724eyf.13 for ; Sun, 26 Dec 2010 05:25:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:date:from:to:cc:subject :message-id:references:mime-version:content-type:content-disposition :in-reply-to:user-agent; bh=gnb546zqpdYb+Aw2wCtUxk/a/n1JVJkXJangg2OPPlQ=; b=ujjKazxTYQdotfYZRmikv9zkm6AV2SE/n032U3vThovkRHdNHCh0WqK54IBX0ND5cW xjcynIyomNwgqFJaHxQjCA+/06WXl8Rqs52bJ/9EfpEZIR69uu7eAi35qnrA9M8i6Q/O f7CcBGpHpdvbSqd4kd/PJizYPkUtbzskxHmjM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=CN2tXtkPFbdnxoP3qlD5c97/IXeGS11WysowRRkkPQpmX+dJHXWii9g23ixyVy4Cax ai4/8WQ2ksPU+nwRA3cW72PopzyHlLAKCp0wrz20sa1Wf5lk//fiQ/QCc9HL5PmPEggS YA4BKxaKyLKRNFMqoyTSQcsylxM89lI3ch7Gc= Received: by 10.14.22.8 with SMTP id s8mr3377396ees.17.1293369903587; Sun, 26 Dec 2010 05:25:03 -0800 (PST) Received: from localhost ([212.98.186.134]) by mx.google.com with ESMTPS id x54sm8027481eeh.5.2010.12.26.05.25.02 (version=TLSv1/SSLv3 cipher=RC4-MD5); Sun, 26 Dec 2010 05:25:02 -0800 (PST) Date: Sun, 26 Dec 2010 15:24:31 +0200 From: Gleb Kurtsou To: Ivan Voras Message-ID: <20101226132431.GA16490@tops> References: <20101223224619.GA21984@tops> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Cc: freebsd-hackers@freebsd.org Subject: Re: [rfc] Replacing FNV and hash32 with Paul Hsieh's SuperFastHash X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Dec 2010 13:25:06 -0000 On (25/12/2010 20:29), Ivan Voras wrote: > On 23.12.2010 23:46, Gleb Kurtsou wrote: > > > For testing I've used dbench with 16 processes on 1 Gb swap back md > > device, UFS + SoftUpdates: > > Old hash (Mb/s): 599.94 600.096 599.536 > > SFH hash (Mb/s): 612.439 612.341 609.673 > > > > It's just ~1% improvement, but dbench is not a VFS metadata intensive > > benchmark. Subjectively it feels faster accessing maildir mailboxes > > with ~10.000 messages : ) > > Try blogbench if you need metadata-intensive operations, or even fsx. blogbench should be good, but I've always had hard time interpreting its results. Besides results tend to very a lot, there is no way to set seed value like in fsx, so that I could run exactly the same test in different configurations. I prefer to use blogbench for stability testing. fsx is a different beast, it reads/writes/truncates at random offsets - great tool for debugging mmap/truncate issues. Patch doesn't improve it in any way. > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"