From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexandre Belloni Date: Fri, 14 Apr 2017 00:18:54 +0200 Subject: [Buildroot] [PATCH] core: add rule to dump packages' build order In-Reply-To: <20170410134440.4713101b@free-electrons.com> References: <20170402130338.12542-1-yann.morin.1998@free.fr> <39bc6b12-1dfd-8ada-f1bc-8597c6872a1c@mind.be> <20170404185928.GA3828@scaer> <20170407192458.GA3420@scaer> <4fef5a6f-15d2-73f6-c759-2887255c987d@mind.be> <20170410134440.4713101b@free-electrons.com> Message-ID: <20170413221854.4tzd6dwqv3ukeoz5@piout.net> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hi, On 10/04/2017 at 13:44:40 +0200, Thomas Petazzoni wrote: > On Mon, 10 Apr 2017 11:28:57 +0200, Arnout Vandecappelle wrote: > > > In my experience, there are two big reasons why an OE build is much slower: > > > > 1. A typical configuration is much bigger (more packages selected). > > > > 2. They do per-package staging in order to enable TLPB. > > This point (2) is in fact not correct, at least according to what I > understood. My colleague Alexandre can confirm, but apparently, > per-package staging has only been very recently introduced in OE. And > yes, top-level parallel build was causing some spurious build failures. > > Alex, if you have more details, we're interested :) > I'd point to http://cgit.openembedded.org/openembedded-core/commit/?id=809746f56df4b91af014bf6a3f28997d6698ac78 It adds RSS (recipe specific sysroots) applied in january. Some issues are still being sorted out but it generally builds fine. Regarding build time, I can point to that one which interestingly concludes that it doesn't add much to the build time (or more correctly that a simple optimisation made up for all the lost time): http://cgit.openembedded.org/openembedded-core/commit/?id=e02716ca29b744fde5a45dabe79fef11df772d92 -- Alexandre Belloni, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com