Re: time in computations

[Joerg Arndt <jj@suse.de>]

* Igor Schein <igor@txc.com> [Sep 26. 2005 04:53]:
> On Sat, Sep 24, 2005 at 12:17:56AM -0400, Mak Trifkovic wrote:
> > Can I program something along these lines in PARI: do calculation xxx for 
> > 1 hr; if you don't finish within that time, quit.
> > 
> > Thanks,
> > Mak
> 
> Workaround:
> 
> limit cputime 3600 # if you're using csh or derivatives
> ulimit -t 3600 # if you're using Bourne shell or derivatives
> 
> Unfortunately it applies to the whole session, not each command.

Just start it in a subshell:
(ulimit -t 3600; gp < script.gp; )


> There's no way to do it natively from inside gp.  I've brought up the
> desirability of this feature in the past, it'd be nice to have it
> accesible via default(), with default value 0 for unlimited. 
> 
> Igor

I strongly vote for not duplicating basic O/S (or shell) functionality
into pari/gp.

-- 
p=2^q-1 prime <== q>2, cosh(2^(q-2)*log(2+sqrt(3)))%p=0
Life is hard and then you die.