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Bill Allombert on Tue, 12 Sep 2023 14:56:20 +0200
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Re: threadsizemax management
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- To: pari-users@pari.math.u-bordeaux.fr
- Subject: Re: threadsizemax management
- From: Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>
- Date: Tue, 12 Sep 2023 14:51:26 +0200
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On Tue, Sep 12, 2023 at 02:24:55PM +0200, Jean-Luc Arnaud wrote:
> Hi all,
>
> I'm quite sure htreadsizemax is managed on a per thread basis, isn't?
Each threads has a separate stack which can increase independantly of the
other, yes.
> I have a script using 2 threads, and only one generates Warning: increasing
> size stack to...
>
> So, I think it's possible to set up threadsizemax to a larger value than the
> full amount of available RAM. Am i right?
>
> For example, I have a Mac with 64 GB or RAM. Setting up threadsizemax to 30
> GB would work as long as only 2 threads increase to 30 GB.
Yes on Linux. On Macos, It depends how Macos handles overcommit.
> What happens if a third thread tries to increase its stack? I guess this
> will generate a "Memory is full" or "No more memory available" error. Right?
Yes.
> And what if a thread terminates? Will its stack be freed, allocating more
> memory for other threads?
No. The memory for all threads is freed when the last thread end.
Cheers,
Bill