From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by yocto-www.yoctoproject.org (Postfix, from userid 118) id 26862E0087C; Thu, 12 Feb 2015 14:19:46 -0800 (PST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on yocto-www.yoctoproject.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 X-Spam-HAM-Report: * 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider * (martin.jansa[at]gmail.com) * -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's * domain * 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily * valid * -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature * -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low * trust * [209.85.212.180 listed in list.dnswl.org] Received: from mail-wi0-f180.google.com (mail-wi0-f180.google.com [209.85.212.180]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id B71F2E007CF for ; Thu, 12 Feb 2015 14:19:43 -0800 (PST) Received: by mail-wi0-f180.google.com with SMTP id h11so8001768wiw.1 for ; Thu, 12 Feb 2015 14:19:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:date:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; bh=I4IMmwVpL4torA2PlPPr06sLT06CjLXENro2sUdCtYY=; b=tnmRf8K3+THxDSXOS3o3C3WqyBuT8Z1qb/2KXzhj4MdAdyZCjZ6QOCC0vQmjHtDtJz voRY/iVGtjCn38NTaKMwrxOXSN5i+12AtzmhQHgPZx5x0F3TDu8qYxNoJaKCieh6I7tA HixjwDpI8PlmkLoDSAqdMwHQVVhBYDt1ktaN3Ex5+Uo5GDpbBmwCJhY8IAkumWdzV0b+ v8GBYB+DrvxFutyG+NxtyEb4gdkQFx6mQdkHHZcksyTNj2NZ7SHl1DRwksHofg+QTaHn IIHLwOPZYjwgjTYldS/fkQWLlod1fWzNdP920bdTLbfjc4hdQ3kOZqFPyPw/UCJu8NEe Yf6w== X-Received: by 10.181.13.146 with SMTP id ey18mr10489184wid.84.1423779582557; Thu, 12 Feb 2015 14:19:42 -0800 (PST) Received: from localhost (ip-89-176-104-3.net.upcbroadband.cz. [89.176.104.3]) by mx.google.com with ESMTPSA id lj13sm4294939wic.9.2015.02.12.14.19.41 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 12 Feb 2015 14:19:41 -0800 (PST) From: Martin Jansa X-Google-Original-From: Martin Jansa Date: Thu, 12 Feb 2015 23:19:46 +0100 To: Gary Thomas Message-ID: <20150212221946.GH2272@jama> References: <54DD1A4C.60004@mlbassoc.com> MIME-Version: 1.0 In-Reply-To: <54DD1A4C.60004@mlbassoc.com> User-Agent: Mutt/1.5.23 (2014-03-12) Cc: Yocto Project Subject: Re: Why did my build need to redo so many tasks? X-BeenThere: yocto@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Discussion of all things Yocto Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Feb 2015 22:19:46 -0000 X-Groupsio-MsgNum: 23569 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="3VRmKSg17yJg2MZg" Content-Disposition: inline --3VRmKSg17yJg2MZg Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Feb 12, 2015 at 02:25:32PM -0700, Gary Thomas wrote: > Yesterday, I built a large image using Poky/Yocto 870323cac1e > Today I updated my Poky repo to 231d4a9d3 >=20 > When I rebuilt the same image, bitbake kicked off more than > 5200 tasks, building virtually every package from scratch. >=20 > How can I tell why this happened? I don't have buildhistory > enabled, but I do still have the tmp & sstate-cache trees > from the process. Is there enough info laying around that > I can tell, e.g. why the GCC toolchain had to be rebuilt > completely? >=20 > Am I correct in assuming that bitbake-whatchanged is really > a Quija board and can only tell me [in advance] what will need > to be done if my layers change? When I ran it after the long > build above, it didn't really tell me much :-( I'm using openembedded-core/scripts/sstate-diff-machines.sh to create sstate signature snaphosts for interesting builds, then when I'm surprised by number of re-executions, I create another snapshot and compare them. --=20 Martin 'JaMa' Jansa jabber: Martin.Jansa@gmail.com --3VRmKSg17yJg2MZg Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlTdJwIACgkQN1Ujt2V2gBwfbQCfbi+g6q2tEczPB4aTQDuB6Pdd YUgAoIg3kJtbIuRh9gVvv968wyDKCeE5 =dLAT -----END PGP SIGNATURE----- --3VRmKSg17yJg2MZg--