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8006952: Slow VM due to excessive code cache freelist iteration

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Remove continous free block requirement

Reviewed-by: kvn
This commit is contained in:
Nils Eliasson 2013-04-11 13:57:44 +02:00
parent 33e3f6b59b
commit 92ef5fe748
8 changed files with 123 additions and 154 deletions
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10
hotspot/src/share/vm/code/codeCache.hpp
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@ -70,7 +70,7 @@ class CodeCache : AllStatic {
static void initialize();
// Allocation/administration
static CodeBlob* allocate(int size); // allocates a new CodeBlob
static CodeBlob* allocate(int size, bool is_critical = false); // allocates a new CodeBlob
static void commit(CodeBlob* cb); // called when the allocated CodeBlob has been filled
static int alignment_unit(); // guaranteed alignment of all CodeBlobs
static int alignment_offset(); // guaranteed offset of first CodeBlob byte within alignment unit (i.e., allocation header)
@ -156,19 +156,13 @@ class CodeCache : AllStatic {
static address low_bound() { return (address) _heap->low_boundary(); }
static address high_bound() { return (address) _heap->high_boundary(); }
static bool has_space(int size) {
// Always leave some room in the CodeCache for I2C/C2I adapters
return largest_free_block() > (CodeCacheMinimumFreeSpace + size);
}
// Profiling
static address first_address(); // first address used for CodeBlobs
static address last_address(); // last address used for CodeBlobs
static size_t capacity() { return _heap->capacity(); }
static size_t max_capacity() { return _heap->max_capacity(); }
static size_t unallocated_capacity() { return _heap->unallocated_capacity(); }
static size_t largest_free_block();
static bool needs_flushing() { return largest_free_block() < CodeCacheFlushingMinimumFreeSpace; }
static bool needs_flushing() { return unallocated_capacity() < CodeCacheFlushingMinimumFreeSpace; }
static bool needs_cache_clean() { return _needs_cache_clean; }
static void set_needs_cache_clean(bool v) { _needs_cache_clean = v; }