How to measure g++ performance? Post: 302433478

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Top Forums UNIX for Advanced & Expert Users How to measure g++ performance? Post 302433478 by Elric of Grans on Tuesday 29th of June 2010 08:27:17 PM

06-29-2010

Registered User

How to measure g++ performance?

I am working on an application with some rather interesting build performance issues. If we build on Solaris/Linux x86/AMD64 the build is rather fast, but it takes more than five times as long on our Solaris Sparc servers (single-threaded builds on the workstations, but multi-threaded on the server!). We are looking to gather some information to find out where the major culprits are (eg precompilation, disk I/O, etc); personally, I suspect template instantiation to be the biggest issue.

How do we break-down the build process to get this kind of information? We use g++/gmake/GNU binutils. As far as I can tell, g++ does not have a convenient `output benchmarking information in xml format' option (the nerve!), so I am assuming we would need to kick-off a set of other applications at the start of the build then analyse their data later. I figure we could probably work out the analysis if only we knew what meters we need to be running (and what options to launch them with, when applicable). Can anyone advise?

Elric of Grans

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mk-build-deps

MK-BUILD-DEPS(1)														  MK-BUILD-DEPS(1)

NAME

       mk-build-deps - build a package satisfying a package's build-dependencies

SYNOPSIS

       mk-build-deps --help|--version

       mk-build-deps [options] control file | package name ...

DESCRIPTION

       Given a package name and/or control file, mk-build-deps will use equivs to generate a binary package which may be installed to satisfy all
       the build dependencies of the given package.

       If --build-dep and/or --build-indep are given, then the resulting binary package(s) will depend solely on the
       Build-Depends/Build-Depends-Indep dependencies, respectively.

OPTIONS

       -i, --install
	   Install the generated packages and its build-dependencies.

       -t, --tool
	   When installing the generated package use the specified tool.  (default: apt-get --no-install-recommends)

       -r, --remove
	   Remove the package file after installing it. Ignored if used without the --install switch.

       -a foo, --arch foo
	   If the source package has architecture-specific build dependencies, produce a package for architecture foo, not for the system
	   architecture. (If the source package does not have architecture-specific build dependencies, the package produced is always for the
	   pseudo-architecture all.)

       -B, --build-dep
	   Generate a package which only depends on the source package's Build-Depends dependencies.

       -A, --build-indep
	   Generate a package which only depends on the source package's Build-Depends-Indep dependencies.

       -h, --help
	   Show a summary of options.

       -v, --version
	   Show version and copyright information.

       -s, --root-cmd
	   Use the specified tool to gain root privileges before installing.  Ignored if used without the --install switch.

AUTHOR

       mk-build-deps is copyright by Vincent Fourmond and was modified for the devscripts package by Adam D. Barratt <adam@adam-barratt.org.uk>.

       This program comes with ABSOLUTELY NO WARRANTY.	You are free to redistribute this code under the terms of the GNU General Public License,
       version 2 or later.

Debian Utilities						    2013-12-23							  MK-BUILD-DEPS(1)