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6858051: Create GC worker threads dynamically

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Reviewed-by: tschatzl, drwhite
This commit is contained in:
Jon Masamitsu 2015-08-06 22:07:30 -07:00
parent af168abecc
commit c16b4b7673
9 changed files with 196 additions and 65 deletions
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12
hotspot/src/share/vm/gc/parallel/gcTaskManager.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -370,6 +370,7 @@ private:
Monitor* _monitor; // Notification of changes.
SynchronizedGCTaskQueue* _queue; // Queue of tasks.
GCTaskThread** _thread; // Array of worker threads.
uint _created_workers; // Number of workers created.
uint _active_workers; // Number of active workers.
uint _busy_workers; // Number of busy workers.
uint _blocking_worker; // The worker that's blocking.
@ -381,6 +382,8 @@ private:
NoopGCTask* _noop_task; // The NoopGCTask instance.
WaitHelper _wait_helper; // Used by inactive worker
volatile uint _idle_workers; // Number of idled workers
uint* _processor_assignment; // Worker to cpu mappings. May
// be used lazily
public:
// Factory create and destroy methods.
static GCTaskManager* create(uint workers) {
@ -546,6 +549,13 @@ protected:
uint active_workers() const {
return _active_workers;
}
uint created_workers() const {
return _created_workers;
}
// Create a GC worker and install into GCTaskManager
GCTaskThread* install_worker(uint worker_id);
// Add GC workers as needed.
void add_workers(bool initializing);
};
//