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[217.169.3.230]) by smtp.gmail.com with ESMTPSA id q4sm711337wjk.24.2016.08.01.22.29.49 for (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 01 Aug 2016 22:29:49 -0700 (PDT) From: Mick To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: [was cross-compile attempt] 32bit chroot Date: Tue, 02 Aug 2016 06:29:43 +0100 Message-ID: <2045719.dbWT1QWjsB@dell_xps> User-Agent: KMail/4.14.10 (Linux/4.4.6-gentoo; KDE/4.14.20; x86_64; ; ) In-Reply-To: <20160802043357.GA13328@waltdnes.org> References: <1544697.klPk7OG4O7@dell_xps> <20160801231124.GA9181@gentoo-tp.home> <20160802043357.GA13328@waltdnes.org> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart5884355.tgBA0YDp9s"; micalg="pgp-sha256"; protocol="application/pgp-signature" X-Archives-Salt: f2f72d7f-40c3-4a0d-af16-f7e16b762408 X-Archives-Hash: aa4c88b5830c72448e9c118bb323cf78 --nextPart5884355.tgBA0YDp9s Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="us-ascii" On Tuesday 02 Aug 2016 00:33:57 waltdnes@waltdnes.org wrote: > On Tue, Aug 02, 2016 at 01:11:24AM +0200, Jeremi Piotrowski wrote >=20 > > Does it make sense to compile your own versions of these packages > > and then binary merge, when portage already contains binary ebuilds= > > for these packages? (firefox-bin/libreoffice-bin/google-chrome) >=20 > I've got an underpowered netbook that needs all the help it can get= . > I build in the VM with... >=20 > -O2 -march=3Dbonnell -mfpmath=3Dsse -pipe -fomit-frame-pointer > -fno-unwind-tables -fno-asynchronous-unwind-tables >=20 > Even older desktops benefit. One case in point is my former Dell > D530 Core2 Duo. When Gentoo had been installed, it could not keep up= > with the slowest stream of NHL Gamecenter Live. Everything was gener= ic > x86 with SSE2 thrown in, from the stage3. After re-emerging system a= nd > world optimized for the machine's cpu, it could keep up with not only= > the lowest quality stream, but a medium-quality stream. So yes, it > helps. >=20 > From http://gentoo-en.vfose.ru/wiki/Safe_Cflags#-march.3Dnative to > find out exactly what your cpu is, run the following command on the > *TARGET* machine... >=20 > gcc -march=3Dnative -E -v - &1 | grep cc1 >=20 > Ignore the flag output, which may be over-optimistic. Just look at= > what it says for "-march=3D". Yes, I've had similar experiences here with own built binaries being fa= ster=20 than generic *-bin packages offered by portage. The 32bit box in quest= ion is=20 running a single core Pentium4 ... I could bet it feels slower than my=20= AppleTV1 with its 1.00GHz Pentium-M. :-) =2D-=20 Regards, Mick --nextPart5884355.tgBA0YDp9s Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. 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