From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752583AbbJNCPS (ORCPT ); Tue, 13 Oct 2015 22:15:18 -0400 Received: from one.firstfloor.org ([193.170.194.197]:34026 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751684AbbJNCPP (ORCPT ); Tue, 13 Oct 2015 22:15:15 -0400 Date: Wed, 14 Oct 2015 04:15:13 +0200 From: Andi Kleen To: George Spelvin Cc: ahferroin7@gmail.com, andi@firstfloor.org, jepler@unpythonic.net, linux-kernel@vger.kernel.org, linux@rasmusvillemoes.dk, tytso@mit.edu Subject: Re: Updated scalable urandom patchkit Message-ID: <20151014021513.GE3533@two.firstfloor.org> References: <20151013162044.GD3533@two.firstfloor.org> <20151013211030.30325.qmail@ns.horizon.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20151013211030.30325.qmail@ns.horizon.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Off hand, do you know how large a read each operation is? I want to > reduce mixback from once per 10 bytes to once per read, and the size > ratio will give me some idea of how large an improvement to expect. My test reads 64 bytes using the syscall. -Andi -- ak@linux.intel.com -- Speaking for myself only.