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

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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
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8
hotspot/src/cpu/sparc/vm/vm_version_sparc.hpp
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@ -64,6 +64,11 @@ protected:
static bool is_niagara1(int features) { return (features & niagara1_m) == niagara1_m; }
static int maximum_niagara1_processor_count() { return 32; }
// Returns true if the platform is in the niagara line and
// newer than the niagara1.
static bool is_niagara1_plus();
public:
// Initialization
static void initialize();
@ -129,4 +134,7 @@ public:
// Override the Abstract_VM_Version implementation.
static uint page_size_count() { return is_sun4v() ? 4 : 2; }
// Calculates the number of parallel threads
static unsigned int calc_parallel_worker_threads();
};