From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43369) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XsxXw-0005Kx-4w for qemu-devel@nongnu.org; Mon, 24 Nov 2014 12:35:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XsxXl-0005r0-9g for qemu-devel@nongnu.org; Mon, 24 Nov 2014 12:35:32 -0500 Received: from mx1.redhat.com ([209.132.183.28]:59490) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XsxXl-0005qn-2N for qemu-devel@nongnu.org; Mon, 24 Nov 2014 12:35:21 -0500 Message-ID: <54736C4A.7020703@redhat.com> Date: Mon, 24 Nov 2014 18:35:06 +0100 From: Max Reitz MIME-Version: 1.0 References: <1416844620-17717-1-git-send-email-mreitz@redhat.com> In-Reply-To: <1416844620-17717-1-git-send-email-mreitz@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH v2 00/12] qcow2: Add new overlap check functions List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , Peter Lieven , Stefan Hajnoczi On 2014-11-24 at 16:56, Max Reitz wrote: > tl;dr > ===== > > * CPU usage at runtime decreased by 150 to 275 percent on > overlap-check-heavy tasks Oops, that should read "15000 to 27500 percent" or "150 to 275 times". Max > * No additional performance problems at loading time (in theory has the > same runtime complexity as a single overlap check right now; in > practice I could not find any problems) > * Decent RAM usage (40 kB for a 1 TB image with 64 kB clusters; 40 MB > for a 1 PB image etc. pp.)