[R] (low level) profiling of code
Prof Brian Ripley
ripley at stats.ox.ac.uk
Mon Jun 7 19:46:45 CEST 2004
You normally need to switch R profiling off, as that uses the same
interrupts as low-level profiling.
I would expect you to get gmon.out output from the the main R executable
on any run, so the first question must be `does your OS support -pg?'
I don't think dynamically loaded code is relevant (provided it is compiled
with -pg). I am pretty sure I managed to profile some examples from the
cluster package on RH8.0 Linux the other day.
On Mon, 7 Jun 2004, Liaw, Andy wrote:
> Dear R-help,
> Can some one tell me how to profile compiled code dynamically loaded into R?
> Here's what I tried on our dual Opteron running SUSE Linux Enterprise Server
> 8 (GCC 3.3):
> Start with R-patched dated 2004-06-07:
> (I also had MAIN_CFLAGS="-pg" in config.site.)
> R is now configured for x86_64-unknown-linux-gnu
> Source directory: .
> Installation directory: /usr/local
> C compiler: gcc -O2 -g -pg -march=k8 -msse2 -m64
> C++ compiler: g++ -O2 -g -pg -march=k8 -msse2 -m64
> Fortran compiler: g77 -O2 -g -pg -march=k8 -msse2 -m64
> Interfaces supported: X11, tcltk
> External libraries: readline
> Additional capabilities: PNG, JPEG
> Options enabled: R profiling
> Recommended packages: no
> I then tried running
> /path/to/R-patched/bin/R CMD BATCH -q -slave myscript.R
> where inside myscript.R is call to R functions that calls .C(). However,
> this does not produce the gmon.out file. Can anyone tell me what I'm
> missing? Any help much appreciated!
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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