Re: How to interrupt a MT calculation?

[Jean-Luc Arnaud <jean-luc@filmsons.com>]

Le 01/07/2023 à 21:55, Bill Allombert a écrit :
> On Sat, Jul 01, 2023 at 02:50:15PM +0200, Bill Allombert wrote:
> > On Sat, Jul 01, 2023 at 01:30:35PM +0200, Loïc Grenié wrote:
> > > On Sat 1 Jul 2023 aT 12:39, Bill Allombert wrote:
> > >
> > > > On Sat, Jul 01, 2023 at 01:04:49AM +0200, Jean-Luc Arnaud wrote:
> > > > > So, it seems like error does not work the same way on Linux (and probably
> > > > > Windows) versus Mac OS, or is there a bug in the 2.16.0 Alpha version?
> > > > No this is a limitation of pthread on macos:
> > > > <
> > > > https://stackoverflow.com/questions/43109438/macos-macoss-pthread-pthread-cancel-asynchronous-not-working
> > >       Definitely not the recommended way, but could a SEGV help?
> > >
> > > install("getpid","l")
> > > extern(Str("kill -SEGV ", getpid()))
> > That would not help: PARI will catch the SEGV and then call pthread_cancel to cancel the threads.
> > No, your best bet is to make new_chunk or set_avma a cancellation point, but this slows down GP.
> Jean-Luc,
> you can try the following patch, it should fix this, but it will slowdown GP a bit.
> (you will need to do 'make clean')
>
> Cheers,
> Bill

Thanks a lot, Bill.

Nevertheless, as I wrote in a previous message, I'm using my own 
interface to an interactive Mac OS Shell.

So, I can list all GP-Pari threads running and, as soon as one stops, 
kill the others and so stop the calculation.

I will try that and let you know, if any interest...

Jean-Luc