mmm_donut: If tasks die while munching, die immediately Recently I noticed that the OOM killer sometimes kills all of our children while in the munching stage but before memory fills up. That leaves the parent process waiting in a loop. Check for death of the children to fix that. BUG=None TEST=mmm_donut.py on kukui-kodama after 1000 in min_ttl_ms Change-Id: Ib0b5fab1414c21b50cece7e7b90c1cb4790aff3e Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/microbenchmarks/+/4482047 Reviewed-by: Vovo Yang <[email protected]> Tested-by: Douglas Anderson <[email protected]> Commit-Queue: Douglas Anderson <[email protected]> Reviewed-by: Brian Geffon <[email protected]>