From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from hetzner.pbcl.net (mail.pbcl.net [88.198.119.4]) by mail.openembedded.org (Postfix) with ESMTP id 02EC073D27 for ; Mon, 26 Oct 2015 21:18:33 +0000 (UTC) Received: from blundell.swaffham-prior.co.uk ([91.216.112.25] helo=e130.local) by hetzner.pbcl.net with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1ZqpA0-0005R8-Hp; Mon, 26 Oct 2015 22:18:32 +0100 Message-ID: <1445894299.6900.8.camel@pbcl.net> From: Phil Blundell To: Mark Hatle Date: Mon, 26 Oct 2015 21:18:19 +0000 In-Reply-To: <562E5AF1.3080807@windriver.com> References: <562E3896.6080405@windriver.com> <1445875841.5251.107.camel@pbcl.net> <562E58BE.9060003@windriver.com> <1445878220.5251.110.camel@pbcl.net> <562E5AF1.3080807@windriver.com> X-Mailer: Evolution 3.12.9-1+b1 Mime-Version: 1.0 Cc: Patches and discussions about the oe-core layer Subject: Re: Prelink problems -- need help! X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Oct 2015 21:18:34 -0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit On Mon, 2015-10-26 at 11:55 -0500, Mark Hatle wrote: > -last- time I got concrete numbers on a complex boot process. It was on the > order of 1-5% boot time.. and a fairly large number of pages saved.. (which > reduced fragmentation as well as saved memory.) I'm slightly surprised at the 5% figure. Martin Jansa posted some statistics in another thread earlier today which showed an improvement from prelink of just under 0.5% (0.24 seconds saved out of 49.51 seconds total) and that's more like what I would have expected. What sort of binaries were you running on the system you measured? I also don't entirely understand the fragmentation argument. We're not talking about a no-mmu configuration here, are we? p.