tree 8ffbb46d8e12a65d47aa93f35b9a807739fd9b6a
parent 4521add17df4b76dee1b0b78e148322b285e39a1
author commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> 1398890850 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> 1398890850 +0000

DM: run child tasks that are already on the CPU threadpool serially

These tasks tend to do similar things with similar sized bitmaps, so running
them serially means we tend to hold 2x bitmaps at a time (golden and
comparison) instead of (1+k)x bitmaps (golden and k concurrent comparisons).

We still migrate GPU task's children over to the main CPU thread pool,
because they'll run faster there and free up capacity on the GPU thread.

Before
  Debug: 54s, 2.9G peak
  Release: 13s, 2.4G peak

After
  Debug: 48s, 1.5G peak
  Release: 15s, 2.0G peak

BUG=skia:2478
R=borenet@google.com, mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/261593008

git-svn-id: http://skia.googlecode.com/svn/trunk@14486 2bbb7eff-a529-9590-31e7-b0007b416f81