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ero
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Joined: 22 Mar 2011
Posts: 3

PostPosted: Tue Mar 22, 2011 10:27 pm    Post subject: Using Gentoo with ICC by default Reply with quote

Hi all,

I just want to share my experience with icc (Intel Composer XE). Last week I compiled my system with icc as default compiler for Portage as instructed here:

http://www.gentoo-wiki.info/HOWTO_ICC_and_Portage

The only difference is in my /etc/portage/bashrc. I added:

source /opt/intel/bin/compilervars.sh intel64

at the top. Without this Portage was unable to find icc and perhaps a lot of other stuff from Composer XE. I am not sure if my system became more responsive than before but for sure it is not slower. The programs behave very well. Only compiz crashed 2-3 times for one week usage but it crashes sometimes anyway.

Here is the output from emerge -vpe world > world

http://chvor.net/world

Here are the packages compiled with gcc:

http://chvor.net/package.gcc

Here is my /etc/portage/bashrc:

http://chvor.net/bashrc

Here is my /etc/make.conf:

http://chvor.net/make.conf
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costel78
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Joined: 20 Apr 2007
Posts: 199

PostPosted: Thu Mar 24, 2011 2:14 pm    Post subject: Reply with quote

Hi ero!

What ebuild do you used to install icc ?
Normally, path issues are solved in /etc/env.d/05icfc

Code:
PATH="/opt/intel/composerxe-2011.2.137/bin/intel64:/opt/intel/composerxe-2011.2.137/bin/ia32"
ROOTPATH="/opt/intel/composerxe-2011.2.137/bin/intel64:/opt/intel/composerxe-2011.2.137/bin/ia32"
LDPATH="/opt/intel/composerxe-2011.2.137/compiler/lib/intel64:/opt/intel/composerxe-2011.2.137/compiler/lib/ia32"
LIBRARY_PATH="/opt/intel/composerxe-2011.2.137/compiler/lib/intel64:/opt/intel/composerxe-2011.2.137/compiler/lib/ia32"
NLSPATH="/opt/intel/composerxe-2011.2.137/compiler/lib/intel64/locale/en_US/%N:/opt/intel/composerxe-2011.2.137/compiler/lib/ia32/locale/en_US/%N"
MANPATH="/opt/intel/composerxe-2011.2.137/man/en_US"

for example.

About compiz crashes, do you have 9.x version ? Because, for me, 0.8.6 is rock stable and I don't encounter any glitches (nvidia binary drivers).
You could also try to replace link-editor with Intel one (xild instead ld) via bashrc
Code:
export GCC=${OCC}
export GCXX=${OCXX}
export OCC="icc"
export OCXX="icpc"
export CFLAGS=${ICCCFLAGS}
export CXXFLAGS=${ICCCXXFLAGS}

# packaged compiled with gcc
[ -r ${ROOT}/etc/portage/package.gcc ] || return 0
while read -a target; do
  if [ "${target}" = "${CATEGORY}/${PN}" ]; then
    export OCC=${GCC}
    export OCXX=${GCXX}
    export CFLAGS="$flags"
    export CXXFLAGS="$CFLAGS"
    break
  fi
done < ${ROOT}/etc/portage/package.gcc

# All packaged compiled with icc are linked with xild, except the ones from package.icc-plain
if [ "${GCC}" = "icc" ]; then
  found="no"
  while read -a target; do
    if [ "${target}" = "${CATEGORY}/${PN}" ]; then
      found="yes"
      break;
    fi
  done < ${ROOT}/etc/portage/package.icc-plain
  if [ "${found}" = "no" ]; then
    export AR=xiar
    export LD=xild
    export LDFLAGS=" -Wl,-O,--sort-common,--warn-once,--hash-style=gnu,--as-needed"
  fi
  while read -a target; do
    if [ "${target}" = "${CATEGORY}/${PN}" ]; then
      export CFLAGS="${CFLAGS/-ipo}"
      export CFLAGS="${CFLAGS/-ipo-jobs4}"
      export CXXFLAGS="${CFLAGS}"
      break;
    fi
  done < ${ROOT}/etc/portage/package.ipo
fi

# Per package cflags (both gcc and icc)
if [ -r ${ROOT}/etc/portage/package.cflags ]; then
  while read target flags; do
    if [ "${target}" = "${CATEGORY}/${PN}" ]; then
      export CFLAGS="$flags"
      export CXXFLAGS="$CFLAGS"
      break
    fi
  done < ${ROOT}/etc/portage/package.cflags
fi

if [ "${OCC}" != "" ]; then
  export CC_FOR_BUILD="${OCC}" #workaround gcc detection function in toolchain-funcs.eclass
fi

unset GCC
unset GCXX


You maybe also want to exclude -gcc from your icc flags. It seem (linuxdna.com) that it cause more trouble than it solve and it's no longer required.
Here are my ICC flags:
Code:
-O2 -xHost -no-prec-div -unroll-aggressive -vec-guard-write -fp-math -ip -fno-builtin -w -malign-double -diag-disable warn -diag-disable caution -diag-disable remark

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dirkfanick
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Joined: 12 Jan 2011
Posts: 201
Location: germany - hamburg

PostPosted: Thu Mar 24, 2011 3:00 pm    Post subject: Reply with quote

Quote:
I am not sure if my system became more responsive...


You could try benchmarktools.
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ero
n00b
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Joined: 22 Mar 2011
Posts: 3

PostPosted: Fri Mar 25, 2011 1:41 pm    Post subject: Reply with quote

Hi all,

@costel78

Thanks for the advices. It's my bad, I forgot to mention that I downloaded Composer XE 2011.2.137 from Intel's website and I installed it manually. Btw is it available in Portage? Also, I would like to ask you, do you think it's worth it to recompile world with your icc flags?

Regarding compiz-fusion, I'm with 0.8.6 and it crashed twice while I was watching video on full screen with VLC and I pressed Alt+TAB. However, now it is working even with video on full screen I don't know what caused those 2 crashes.

@dirkfanick

Where can I find benchmarktools is it http://lbs.sourceforge.net/ and is it available in Portage?
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costel78
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Joined: 20 Apr 2007
Posts: 199

PostPosted: Fri Mar 25, 2011 5:05 pm    Post subject: Reply with quote

No, it's not available from portage. I made my own ebuild from old-one from portage and bicatali overlay.
Here is it:
Code:
# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/dev-lang/icc/icc-11.1.072-r1.ebuild,v 1.1 2010/11/26 13:20:12 jlec Exp $

EAPI="3"

inherit rpm versionator check-reqs

PB=cproc
PACKAGEID="l_ccompxe_${PV}"
PACKAGEID=${PACKAGEID/_12/_2011}
RELEASE="$(get_version_component_range 1-2)"
BUILD="$(get_version_component_range 3)"
PID=2054

DESCRIPTION="Intel compiler suite for Linux"
HOMEPAGE="http://www.intel.com/software/products/compilers/clin/"
SRC_COM="http://registrationcenter-download.intel.com/irc_nas/${PID}/${PACKAGEID}"
IUSE="both eclipse idb ipp mkl"
#SRC_URI="amd64? ( ${SRC_COM/_2011/_intel64_2011}.tgz )
SRC_URI="amd64? ( SRC_URI="${SRC_COM}.tgz" )
   x86?  ( ${SRC_COM/_2011/_ia32_2011}.tgz )"

LICENSE="Intel-SDP"
SLOT="0"
KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-linux"

RESTRICT="mirror"

DEPEND=""
RDEPEND="eclipse? ( >=dev-util/eclipse-sdk-3.4 )"

DESTINATION="opt/intel/composerxe-${PV/12./2011.}"
EDESTINATION="${EROOT#/}${DESTINATION}"

QA_TEXTRELS="${EDESTINATION}/*"
QA_EXECSTACK="${EDESTINATION}/*"
QA_PRESTRIPPED="${EDESTINATION}/compiler/lib/*/.*libFNP.so ${EDESTINATION}/bin/*/.* ${EDESTINATION}/debugger/*/*/.*"
QA_DT_HASH="
   ${EDESTINATION}/bin/*/.*
   ${EDESTINATION}/compiler/lib/*/.*
   ${EDESTINATION}/mkl/lib/*/.*
   ${EDESTINATION}/mkl/benchmarks/mp_linpack/bin_intel/*/.*
   ${EDESTINATION}/ipp/lib/*/.*
   ${EDESTINATION}/debugger/*/*/.*"

pkg_setup() {
   use x86 && use both && die "You cannot use amd64 libraries pulled by \"both\" flag on your architecture. Please remove \"both\" from your use flags."
   CHECKREQS_MEMORY=1024
   CHECKREQS_DISK_BUILD=3072
   use idb && use ipp && use mkl && CHECKREQS_DISK_BUILD=4096
   check_reqs
   IARCH=ia32
   use amd64 && IARCH=intel64
   use ia64 && IARCH=ia64
}

src_unpack() {
   unpack ${A}
   mv "${WORKDIR}"/l_* "${S}"
   cd "${S}"
   # tbb is open source, thus built from sources in dev-cpp/tbb
   rm -f rpms/*tbb*.rpm
   use idb || rm -f rpms/*idb*.rpm
   use ipp || rm -f rpms/*ipp*.rpm
   use mkl || rm -f rpms/*mkl*.rpm
   use eclipse || rm -f rpms/*cdt*.rpm
   if has_version "~dev-lang/ifc-${PV}"; then
      rm -f rpms/*cprolib*.rpm
      use idb && built_with_use dev-lang/ifc idb && rm -f rpms/*idb*.rpm
      use mkl && built_with_use dev-lang/ifc mkl && rm -f rpms/*mkl*.rpm
   fi
   for x in rpms/intel*.rpm; do
      einfo "Extracting $(basename ${x})..."
      rpm_unpack ./${x} || die "rpm_unpack ${x} failed"
   done
}

link_eclipse_plugins() {
   ECLIPSE_V="$1"
   CDT_V="$2"
   einfo "Linking eclipse (v${ECLIPSE_V}) plugin cdt (v${CDT_V})"
   dodir /usr/$(get_libdir)/eclipse-${ECLIPSE_V}/plugins
   dodir /usr/$(get_libdir)/eclipse-${ECLIPSE_V}/features

   for f in "${DESTINATION}/eclipse_support/cdt${CDT_V}/eclipse/plugins"/*; do
      dosym "${EROOT}${f}" /usr/$(get_libdir)/eclipse-${ECLIPSE_V}/plugins
   done

   for f in "${DESTINATION}/eclipse_support/cdt${CDT_V}/eclipse/features"/*; do
      dosym "${EROOT}${f}" /usr/$(get_libdir)/eclipse-${ECLIPSE_V}/features
   done
   eend $?
}

#src_prepare() {
   #sed -n -e "s|\${SHARED_LOCATION}|${DESTINATION}|g" pset/install.shs || die
   # fix world writeable files
   #[[ -d ${DESTINATION}/mkl ]] && chmod 644 \
   #   ${DESTINATION}/mkl/tools/{environment,builder}/* \
   #   ${DESTINATION}/mkl/tools/plugins/*/*
   # remove for collision (bug #288038)
   #has_version "~dev-lang/ifc-${PV}" && \
   #   rm -f ${DESTINATION}/lib/*/locale/*/flexnet.cat
#}

src_install() {

   keepdir /opt/intel/licenses
   einfo "Copying files"
   dodir "/${DESTINATION}"
   #cp -pPR ${DESTINATION}/* "${ED}"/${DESTINATION}/ || die "Copying ${PN} failed"
   mv ${DESTINATION}/* "${ED}"/${DESTINATION}/ || die "Copying ${PN} failed"
   #mv "${ED}"/${DESTINATION}/compiler/* "${ED}"/${DESTINATION}/ || die "Copying ${PN} failed"
   #rmdir "${ED}"/${DESTINATION}/compiler
   
   local envf=05icfc

   if use both; then
      LD=${EROOT}${DESTINATION}/compiler/lib/${IARCH}:${EROOT}${DESTINATION}/compiler/lib/ia32
      use idb && LS=${LD}:${EROOT}${DESTINATION}/debugger/lib/${IARCH}:${EROOT}${DESTINATION}/debugger/lib/ia32
      use ipp && LD=${LD}:${EROOT}${DESTINATION}/ipp/lib/${IARCH}:${EROOT}${DESTINATION}/ipp/lib/ia32
      use mkl && LD=${LD}:${EROOT}${DESTINATION}/mkl/lib/${IARCH}:${EROOT}${DESTINATION}/mkl/lib/ia32
      cat > ${envf} <<-EOF
         PATH="${EROOT}${DESTINATION}/bin/${IARCH}:${EROOT}${DESTINATION}/bin/ia32"
         ROOTPATH="${EROOT}${DESTINATION}/bin/${IARCH}:${EROOT}${DESTINATION}/bin/ia32"
         LDPATH="${LD}"
         LIBRARY_PATH="${LD}"
         NLSPATH="${EROOT}${DESTINATION}/compiler/lib/${IARCH}/locale/en_US/%N:${EROOT}${DESTINATION}/compiler/lib/ia32/locale/en_US/%N"
         MANPATH="${EROOT}${DESTINATION}/man/en_US"
      EOF
   else
      LD=${EROOT}${DESTINATION}/compiler/lib/${IARCH}:${EROOT}${DESTINATION}/debugger/lib/${IARCH}
      use ipp && LD=${LD}:${EROOT}${DESTINATION}/ipp/lib/${IARCH}
      use mkl && LD=${LD}:${EROOT}${DESTINATION}/mkl/lib/${IARCH}
      cat > ${envf} <<-EOF
         PATH="${EROOT}${DESTINATION}/bin/${IARCH}"
         ROOTPATH="${EROOT}${DESTINATION}/bin/${IARCH}"
         LDPATH="${LD}"
         LIBRARY_PATH="${LD}"
         NLSPATH="${EROOT}${DESTINATION}/compiler/lib/${IARCH}/locale/en_US/%N"
         MANPATH="${EROOT}${DESTINATION}/man/en_US"
      EOF
   fi

   doenvd ${envf} || die "doenv ${envf} failed"

   #[[ -d ${DESTINATION}/debugger ]] && \
   #   dosym ../../common/com.intel.debugger.help_1.0.0 \
   #   ${DESTINATION}/debugger/gui/${IARCH}/plugins

   if use eclipse; then
      if has_version 'dev-util/eclipse-sdk:3.4'; then
         link_eclipse_plugins "3.4" "5.0" || die
      fi
      if has_version 'dev-util/eclipse-sdk:3.5'; then
         link_eclipse_plugins "3.5" "6.0" || die
      fi
   fi
}

pkg_postinst() {
   elog "Make sure you have recieved the an Intel license."
   elog "To receive a non-commercial license, you need to register at:"
   elog "http://software.intel.com/en-us/articles/non-commercial-software-development/"
   elog "Install the license file into ${EROOT}opt/intel/licenses."
}


If it worth or not to recompile all world set it's up to you. For me, the answer was yes.
The speed-up can be observed (definitely without any benchmarking tools) during audio-video transcoding, databases, archives programs like 7zip, bzip2 etc and apache.
For what are you using Gentoo ? Long story short - test your main apps, compare the numbers (icc/icpc vs gcc/gcc++) and make your decision.
My flags has have proven to be stable. No segmentation fault. I have only few packages compiled with ipo. Use ipo flag very carefully :)
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