Comment #1 on issue 729 by AlgorithmX2: V8's preemption mechanism
(Locker::StartPreemption()) is broken
http://code.google.com/p/v8/issues/detail?id=729
Expecting preemption in a situation like this...
c++
v8::Locker::StartPreemption( 60 );
js:
var test = 0;
while(1) { test += 1; }
Is extremely unpredictable.
I've tested it on a quad core win7 machine, and the results vary. I've seen
times where a locked thread gained access almost instantly, and I've also
seen cases where the locked thread gained access after 30 seconds, or
longer, and the longer cases seem to the majority.
I can only imagine that this gets much worse if you have multiple locked
threads.
I think this definitely needs improvement.
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