archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-23 20:44:41 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

6362677: Change parallel GC collector default number of parallel GC threads

Browse source 
Use the same default number of GC threads as used by ParNewGC and ConcMarkSweepGC (i.e., the 5/8th rule).

Reviewed-by: ysr, tonyp
This commit is contained in:
Jon Masamitsu 2008-02-22 17:17:14 -08:00
parent 74f243990c
commit 63f1de52fc
8 changed files with 174 additions and 81 deletions
Download patch file Download diff file Expand all files Collapse all files

15
hotspot/src/share/vm/runtime/vm_version.hpp
View file

@ -36,6 +36,12 @@ class Abstract_VM_Version: AllStatic {
static int _vm_minor_version;
static int _vm_build_number;
static bool _initialized;
static int _parallel_worker_threads;
static bool _parallel_worker_threads_initialized;
static unsigned int nof_parallel_worker_threads(unsigned int num,
unsigned int dem,
unsigned int switch_pt);
public:
static void initialize();
@ -69,4 +75,13 @@ class Abstract_VM_Version: AllStatic {
// subclasses should define new versions to hide this one as needed. Note
// that the O/S may support more sizes, but at most this many are used.
static uint page_size_count() { return 2; }
// Returns the number of parallel threads to be used for VM
// work. If that number has not been calculated, do so and
// save it. Returns ParallelGCThreads if it is set on the
// command line.
static unsigned int parallel_worker_threads();
// Calculates and returns the number of parallel threads. May
// be VM version specific.
static unsigned int calc_parallel_worker_threads();
};