[R-SIG-Mac] hang on use of ESC in R 2.6.2

[Byron Ellis]

R runs in other threads now? Does it actually do it or did you have to
resort to turning off the C stack protection stuff that just goes
insane when you try to initialize it in a second thread?

On Feb 12, 2008 6:29 AM, Simon Urbanek <simon.urbanek at r-project.org> wrote:
> [I have replied privately, but here is the relevant part of the
> response for the list:]
>
> If R is stuck in a long computation in C code that doesn't call
> R_ProcessEvents, we're helpless. There is no way to stop that code
> until it finishes. Even if you press <Esc> it may not help (just give
> you the beachball), because the event of you pressing <Esc> must first
> be processed so it can fire, but if R is already somewhere in a C
> code, so it will never get processed, hence the beachball (on OS X the
> beachball means that the application doesn't process events for some
> time).
>
> Now, you can debug this if you desire so to find out what R is doing.
> To do so, start a Terminal (in parallel to your unresponsive R) and
> type:
> gdb
> attach R
>
> That should get you into the R process that is spinning. Now you can
> issue
> bt
> to see where it really is. Very likely it will be somewhere is the
> package performing the computation. But if it's not, then we want to
> know.
>
> Anyway, I suspect that this is not really something we can do much
> about (in the current GUI). The new GUI 2.0 is running R in a separate
> thread, so it is always responsive despite R being busy, hence we can
> deal better with unresponsive R there.
>
> Cheers,
> Simon
>
>
> On Feb 10, 2008, at 10:53 AM, Ken Knoblauch wrote:
>
> > Hi,
> >
> > I notice with R 2.6.2 on a powerpc and on a MacBook Pro that if I
> > hit ESC to
> > annul running a line in the GUI, input hangs with the spinning beach
> > ball
> > for an indefinite period of time.  I haven't tried to see how long
> > it will
> > hang, but
> > it is at least several minutes too long.  Checking Force Quit
> > indicates that
> > R is not responding.
> >
> > On the power pc, w/ Tiger (but the same thing happens on my Intel
> > Mac w/
> > Leopard)
> > sessionInfo()
> > R version 2.6.2 (2008-02-08)
> > powerpc-apple-darwin8.10.1
> >
> > locale:
> > en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
> >
> > attached base packages:
> > [1] stats     graphics  grDevices utils     datasets  methods   base
> >
> >
> > Thanks.
> >
> > best,
> >
> > Ken
> >
> >
> > --
> > Ken Knoblauch
> > Inserm U846
> > Institut Cellule Souche et Cerveau
> > Département Neurosciences Intégratives
> > 18 avenue du Doyen Lépine
> > 69500 Bron
> > France
> > tel: +33 (0)4 72 91 34 77
> > fax: +33 (0)4 72 91 34 61
> > portable: +33 (0)6 84 10 64 10
> > http://www.sbri.fr
> >
> > _______________________________________________
> > R-SIG-Mac mailing list
> > R-SIG-Mac at stat.math.ethz.ch
> > https://stat.ethz.ch/mailman/listinfo/r-sig-mac
> >
> >
>
> _______________________________________________
> R-SIG-Mac mailing list
> R-SIG-Mac at stat.math.ethz.ch
> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
>



-- 
Byron Ellis (byron.ellis at gmail.com)
"Oook" -- The Librarian