[scikit-learn] Estimator.predict() thread safety

[Philip Tully]

Gotcha - so perhaps I should ensure FeatureUnion[n_jobs] +
GirdSearch[n_jobs] < # cores?

On Fri, Jun 17, 2016 at 11:21 AM, Gael Varoquaux <
gael.varoquaux at normalesup.org> wrote:

> > I am typically careful with this, e.g., if my machine has 16 cores, I’d
> > set feature union to n_jobs=3 and the gridsearch_cv to n_jobs=4 or so.
> > Curious to hear what the scikit devs think about nesting calls
> > n_jobs=-1; am I too conservative?
>
> Nested parallelism doesn't work. It's a limitation of multiprocessing.
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