[rkward-devel] 100% CPU usage after using multicore functions

[Thomas Friedrichsmeier]

Hi,

On Wednesday 13 January 2010, Michel Lang wrote:
> I've just discovered that RKWard and the multicore-package
> (http://cran.r-project.org/web/packages/multicore/index.html) don't
> work well together: After using mclapply(), RKWard remains using 100%
> CPU on one core.

yes, unfortunately, the forking screws up RKWard. We already have a bug report 
about this: 
http://sourceforge.net/tracker/?func=detail&aid=2866476&group_id=50231&atid=459007 
. To fix this we will need to re-design the R backend to run in a separate 
process. This will happen, eventually, as it will hopefully fix a number of 
further obscure bugs besides this one (esp. those with loading some Java or 
Gtk packages), but this is not trivial, and unlikely to happen, soon.

Workaround to allow using RKWard during development of the code:
   options("mc.cores"=1)

Regards
Thomas
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 198 bytes
Desc: This is a digitally signed message part.
URL: <http://mail.kde.org/pipermail/rkward-devel/attachments/20100115/5ffcab0a/attachment.sig>