archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 06:45:07 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

6984287: Regularize how GC parallel workers are specified

Browse source 
Associate number of GC workers with the workgang as opposed to the task.

Reviewed-by: johnc, ysr
This commit is contained in:
Jon Masamitsu 2010-09-20 14:38:38 -07:00
parent 3af63c10ab
commit 28e56b8970
29 changed files with 504 additions and 216 deletions
Download patch file Download diff file Expand all files Collapse all files

10
hotspot/src/share/vm/utilities/taskqueue.hpp
View file

@ -305,6 +305,12 @@ bool GenericTaskQueue<E, N>::push_slow(E t, uint dirty_n_elems) {
return false;
}
// pop_local_slow() is done by the owning thread and is trying to
// get the last task in the queue. It will compete with pop_global()
// that will be used by other threads. The tag age is incremented
// whenever the queue goes empty which it will do here if this thread
// gets the last task or in pop_global() if the queue wraps (top == 0
// and pop_global() succeeds, see pop_global()).
template<class E, unsigned int N>
bool GenericTaskQueue<E, N>::pop_local_slow(uint localBot, Age oldAge) {
// This queue was observed to contain exactly one element; either this
@ -637,6 +643,9 @@ public:
// in an MT-safe manner, once the previous round of use of
// the terminator is finished.
void reset_for_reuse();
// Same as above but the number of parallel threads is set to the
// given number.
void reset_for_reuse(int n_threads);
#ifdef TRACESPINNING
static uint total_yields() { return _total_yields; }
@ -782,3 +791,4 @@ typedef GenericTaskQueueSet<OopStarTaskQueue> OopStarTaskQueueSet;
typedef OverflowTaskQueue<size_t> RegionTaskQueue;
typedef GenericTaskQueueSet<RegionTaskQueue> RegionTaskQueueSet;