933299 - [PJS] Run GC eagerly before entering a parallel section

Status: RESOLVED WONTFIX

(Core :: JavaScript Engine, defect)

Description

[Niko Matsakis [:nmatsakis]]

Currently if we must GC during parallel execution we bail out. We previously attempted to add a stop-the-world GC into the parallel runtime, but it was deemed too complex. A simpler solution is to observe the amount of allocation that has historically been done by parallel sections and try to predict whether a GC will be necessary -- if so we can pre-emptively run the GC before entering the parallel section. This could be done even simpler (but less effectively) by just using a more aggressive GC threshold that is a constant.

Comment 1

[Niko Matsakis [:nmatsakis]]

STW GC was bug 862923