[R-sig-Debian] Debian packaging and openblas related crash when profiling in R

[Paul Johnson]

Dirk!

Correct as usual!

On Tue, Dec 11, 2012 at 12:33 PM, Dirk Eddelbuettel <edd at debian.org> wrote:
> | On Debian wheezy, I have the R packaging that CRAN (you) provide.  I
>
> Not so -- I provide the distro package. Johannes provides the Debian
> "backport" build via CRAN, Michael does likewise for Ubuntu.
>
> | run into a little trouble while trying to fiddle with alternative
> | BLAS.
> |
> | I know you and I went around on this last year and I think perhaps
> | I've found something wrong in the framework, or I've just done
> | something wrong.
> |
> | I installed the packages openblas-base and openblas-dev, and they do
> | the "update alternatives" thing so that their shared library is at the
> | right spot. I can't tell if R runs any faster, but it does run, which
> | is encouraging.
> |
> | Now here's the problem I see. Using Rprof causes R to crash, but only
> | when openblas stuff is in the picture. I wondered what you think?
> |

Here's the evidence you are right.

Before starting R, restrict openblas's use of threads in the environment

$ export GOTO_NUM_THREADS=1

After that, HAPPY profiling in R!

pj

-- 
Paul E. Johnson
Professor, Political Science      Assoc. Director
1541 Lilac Lane, Room 504      Center for Research Methods
University of Kansas                 University of Kansas
http://pj.freefaculty.org               http://quant.ku.edu