From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1435C18E7D for ; Wed, 22 May 2019 10:51:06 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9A98820856 for ; Wed, 22 May 2019 10:51:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9A98820856 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([127.0.0.1]:40072 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hTOpt-0002Ti-UI for qemu-devel@archiver.kernel.org; Wed, 22 May 2019 06:51:05 -0400 Received: from eggs.gnu.org ([209.51.188.92]:59548) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hTOn3-00013p-6A for qemu-devel@nongnu.org; Wed, 22 May 2019 06:48:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hTOn2-0002F8-2N for qemu-devel@nongnu.org; Wed, 22 May 2019 06:48:09 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49524) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hTOmz-0002CM-KK; Wed, 22 May 2019 06:48:05 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0A3A5300BCE9; Wed, 22 May 2019 10:47:59 +0000 (UTC) Received: from localhost.localdomain (ovpn-117-92.ams2.redhat.com [10.36.117.92]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 33ADE601B0; Wed, 22 May 2019 10:47:55 +0000 (UTC) Date: Wed, 22 May 2019 12:47:53 +0200 From: Kevin Wolf To: Vladimir Sementsov-Ogievskiy Message-ID: <20190522104753.GD6087@localhost.localdomain> References: <20190408162617.258535-1-vsementsov@virtuozzo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190408162617.258535-1-vsementsov@virtuozzo.com> User-Agent: Mutt/1.11.3 (2019-02-01) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.47]); Wed, 22 May 2019 10:47:59 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-devel] [PATCH v2 for 4.1 0/2] avoid lseek on block_status X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, qemu-block@nongnu.org, qemu-devel@nongnu.org, mreitz@redhat.com, stefanha@redhat.com, den@openvz.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Am 08.04.2019 um 18:26 hat Vladimir Sementsov-Ogievskiy geschrieben: > Hi! > > It's a continuation for > "[PATCH] qcow2: avoid lseek on block_status if possible" > https://lists.gnu.org/archive/html/qemu-devel/2019-01/msg06598.html > > performance results for block-status on tmpfs [tests originally by Kevin, > now they are in 01]: > > ./tests/perf/block/qcow2/convert-blockstatus /ramdisk/x > > after 01: > > plain: 81.77 > forward: 82.61 > prealloc: 0.01 > > after 02: > > plain: 0.12 > forward: 0.12 > prealloc: 0.01 Thanks, applied to the block branch. Kevin