On 17 September 2010 10:29, François Bissey <[email protected]> wrote:
>> On 09/17/2010 02:25 AM, Dr. David Kirkby wrote:
>> > http://trac.sagemath.org/sage_trac/ticket/9733
>> >
>> > is supposed to fix "Parallel build of Singular 3-1-1-4-package fails in
>> > rare case"
>> >
>> > I just downloaded the sage-4.6.alpha1.tar file (Mihesh gave a hint where
>> > it was), and it failed on building Singular, despite this patch was
>> > committed.
>>
>> Thanks for reporting this at #9733.
>>
>> Please note that this version is an unofficial, unreleased, "trial"
>> 4.6.alpha1 that I've been testing.  It is definitely not the "final"
>> version.

I was aware of that, but it seemed to be worth reporting this failure.

> I am taking a look at this shortly. I don't have hardware on which I can push
> parallel make so far. There are some messages I haven't seen before in a
> parallel make of singular I must say. This particular failure should be easy
> but there may be more after it.
>
> Francois

To be honest, I don't think that would matter much. There's nothing
stopping you running 10-20 threads on a single processor machine. The
scheduling algorithm in the operating system would still switch the
active processes around, and one compilation would start before
another ends.

So I believe even a single core machine, with Sage built in parallel,
could exhibit this problem.

If it was helpful, I could set this up later and build pari 100 times
and log where it fails. But I'm not at home, and not able to do that
now. (Yes, I could ssh in and set it up, but it needs more thinking
about than time I can devote to it now, while using a laptop on
batteries).

Dave

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