[WK2][iOS] WebContent process main thread should have fixed priority
authorcdumez@apple.com <cdumez@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Mon, 27 Jul 2015 05:08:24 +0000 (05:08 +0000)
committercdumez@apple.com <cdumez@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Mon, 27 Jul 2015 05:08:24 +0000 (05:08 +0000)
commitfbd363e2e0e3971c19e54cce2f9e5ef9ad51dc97
tree9b5e54b0efd65e9d7411bddfbe9d6bd9e9220daa
parent6483c29acad9f0a37e1921fd31017259f49ab41d
[WK2][iOS] WebContent process main thread should have fixed priority
https://bugs.webkit.org/show_bug.cgi?id=147313
<rdar://problem/22003112>

Reviewed by Darin Adler.

WebContent process main thread should have fixed priority on iOS 9.
Priority decay regresses PLT and fixing the main thread's priority
gives up a ~3% progression on warm PLT (tested on iPhone 5s).

* WebProcess/cocoa/WebProcessCocoa.mm:
(WebKit::WebProcess::platformInitializeWebProcess):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@187412 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Source/WebKit2/ChangeLog
Source/WebKit2/WebProcess/cocoa/WebProcessCocoa.mm