From owner-freebsd-arm@FreeBSD.ORG Thu Dec 18 21:33:05 2014 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 63EADFA1 for ; Thu, 18 Dec 2014 21:33:05 +0000 (UTC) Received: from mail-pd0-f174.google.com (mail-pd0-f174.google.com [209.85.192.174]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 2C55A28FE for ; Thu, 18 Dec 2014 21:33:04 +0000 (UTC) Received: by mail-pd0-f174.google.com with SMTP id fp1so2198452pdb.5 for ; Thu, 18 Dec 2014 13:33:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:subject:mime-version:content-type:from :in-reply-to:date:cc:message-id:references:to; bh=sfdp6hX7rYu9F+ns2uUe1hpK43iBlxUG3iDqMNSo0iw=; b=XgQ5LzdXOfVCvTWVyH2sYSgK7PXq2TVshql6n306jAFMtp6tV5CMlXHUs/VVTQ7TV+ CdMnWNOqjXh39GoyDsAxDIWj9Jpdp/jjiB8vWKYvdbg0KOCJ0IloA1Z/husxHtK9KEms pIvvgzHSKVpO3orOqasDzLU9VpU4NPVOeE3DXEUG1LkHG44v0EVDkUPf6DMDj9Cz081J pohl5lNzhFY2ePH5Bjt/Z8OZDOEUmXSxXi9Tj8WxODc2ZiieQfSGc/oaZ2ssSo+YtO15 9Olbj79WhoDnxHBgFh9RnzGOEzT+3KRu1tu+PjzeGE/v6OaHyR0tdjOgfLUDuN0iHjQG pnbw== X-Gm-Message-State: ALoCoQm2x4R59by78jz9/8nwpZe2SOZ7SgR70f6Y6AwichfOXdOCw8lM4BarD+5Wq2VN2fdITkf6 X-Received: by 10.70.42.172 with SMTP id p12mr7124521pdl.66.1418938384482; Thu, 18 Dec 2014 13:33:04 -0800 (PST) Received: from [10.64.25.114] ([69.53.236.236]) by mx.google.com with ESMTPSA id cm10sm7670846pad.46.2014.12.18.13.33.02 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 18 Dec 2014 13:33:03 -0800 (PST) Sender: Warner Losh Subject: Re: RFT: Please help testing the llvm/clang 3.5.0 import Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) Content-Type: multipart/signed; boundary="Apple-Mail=_A5CA1A93-A6F5-47F0-A106-C200CAC64F54"; protocol="application/pgp-signature"; micalg=pgp-sha512 X-Pgp-Agent: GPGMail 2.5b3 From: Warner Losh In-Reply-To: <18CDB8BF-C24E-442D-8904-5DB777E64A62@gmail.com> Date: Thu, 18 Dec 2014 14:33:01 -0700 Message-Id: <68DB489E-7345-4D94-9CE6-44A003D4B326@bsdimp.com> References: <8598B1D4-5485-426F-B6D6-22BF26AC5FE1@FreeBSD.org> <21650.55288.425711.209975@jerusalem.litteratus.org> <9D9850F8-62D6-4A85-BED3-1B4AB4DE5C14@bsdimp.com> <18CDB8BF-C24E-442D-8904-5DB777E64A62@gmail.com> To: Garrett Cooper X-Mailer: Apple Mail (2.1993) Cc: FreeBSD ARM , Robert Huff , Dimitry Andric , FreeBSD ports , FreeBSD-Current X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Dec 2014 21:33:05 -0000 --Apple-Mail=_A5CA1A93-A6F5-47F0-A106-C200CAC64F54 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 > On Dec 18, 2014, at 2:17 PM, Garrett Cooper = wrote: >=20 > On Dec 18, 2014, at 6:51, Warner Losh wrote: >=20 >> With the recent parallelism work, the is true. It might save a couple = percent >> off the build time. Before those changes, though, disabling all non = target >> arches saved about 10% of the buildworld time. >=20 > I=92m curious. How much is 10% in terms of minutes and with what -j = value? That depends on how long the build takes. For my 20 minute builds it was = about 2 minutes faster. At the time, -j didn=92t really effect build times = once you got north of 4 because parallelism really sucked. Now it doesn=92t suck and it = scales much better and I suspect that the time savings would be tiny because it = would be done at the same time as other things anyway, but I=92ve not measured it = directly. >> Creating a hack to do this is easy (which is how I measured it). But = Dimitry >> is right that creating a robust solution is hard. Even harder if you = want it >> to be completely clean. >=20 > It didn=92t seem incredibly hard =97 it just required a bit more = =93generated files=94 in clang AFAICT. I=92ll hang ten until clang35 is = in so I can re-asses what=92s going on with building it. Yea, and that file generation is a pita, or I=92d have committed my changes a while ago... >> I tend to agree. IMHO, supporting the work going on to bring the >> meta-mode stuff will pay far higher dividends than optimizing this >> corner of the build. >=20 > True=85 probably will! Yea, this isn=92t a problem worth solving today. Warner --Apple-Mail=_A5CA1A93-A6F5-47F0-A106-C200CAC64F54 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJUk0gNAAoJEGwc0Sh9sBEACCoQAMgYuu6g/pPHLcpndN8/cKjv g44ubOsyG8i+1ahZnP/bCGUdDRw9QitdwhV5WLktELlecYALccwPGoyiqlBg6vdt sJ/lKgDVSL0CKOhyUpPvfugB9D6qt3E1oQvqgIQ4iroxI/VeybFpPyBi0LS3L2oU +M6eSNgQWmFotss/MGHIN+6xygsQyxCskO6ft5qaOg/Vam60QrzMfcbQX/50EBZG opl8tpj8tqOuq0FZHbgPxpH6DNWrdyMzXL38yT0xQWUXtgH7OHr4n9xap6oD7iTy Nou9SwSFEEB7WJ3zgRPgg1HmASYMkHPUD7oQh7bn3OIfr777jQtBpS1z0CAdTvgW XHl4cIWuETI/5fo8aMdOj4IdMJTqnqr9M4Nelk4FYeBohp71Id0CZmUk5dSEeoam WY5mfIMgjkmxcz4oqHwJhpblVDyVQ7364wjBdanUX3Mwhv7u88NXce6K9W6T+2j9 sc5nVaDLQTUKnHAdjh7GmZcGv3SFMwMkBsu7dqipvWkK8a7HbxU1k5tggq+mdVdK USW9I7KRM+05Bqx1I6m2W5/iBQ6BmIbY0z9hdA5c0dEL/0WDgf5uuV2sHp3te2hZ g39Z1tb/Bx1axOj37ahnfsMurVSAoptO2BpgXbCnc87CsgNl24m0Z+zNdZou3moA uAYq7Xjw2xfwibX98mJC =2YY7 -----END PGP SIGNATURE----- --Apple-Mail=_A5CA1A93-A6F5-47F0-A106-C200CAC64F54--