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7025742: Can not use CodeCache::unallocated_capacity() with fragmented CodeCache

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Use largest_free_block() instead of unallocated_capacity().

Reviewed-by: iveresov, never, ysr
This commit is contained in:
Vladimir Kozlov 2011-03-09 09:15:16 -08:00
parent 84ef74286f
commit fd6487f201
7 changed files with 28 additions and 15 deletions
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15
hotspot/src/share/vm/code/codeCache.cpp
View file

@ -939,9 +939,16 @@ void CodeCache::print_bounds(outputStream* st) {
_heap->high(),
_heap->high_boundary());
st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT
" adapters=" UINT32_FORMAT " free_code_cache=" SIZE_FORMAT
" adapters=" UINT32_FORMAT " free_code_cache=" SIZE_FORMAT "Kb"
" largest_free_block=" SIZE_FORMAT,
CodeCache::nof_blobs(), CodeCache::nof_nmethods(),
CodeCache::nof_adapters(), CodeCache::unallocated_capacity(),
CodeCache::largest_free_block());
nof_blobs(), nof_nmethods(), nof_adapters(),
unallocated_capacity()/K, largest_free_block());
}
void CodeCache::log_state(outputStream* st) {
st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'"
" adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'"
" largest_free_block='" SIZE_FORMAT "'",
nof_blobs(), nof_nmethods(), nof_adapters(),
unallocated_capacity(), largest_free_block());
}

3
hotspot/src/share/vm/code/codeCache.hpp
View file

@ -147,6 +147,7 @@ class CodeCache : AllStatic {
static void verify(); // verifies the code cache
static void print_trace(const char* event, CodeBlob* cb, int size = 0) PRODUCT_RETURN;
static void print_bounds(outputStream* st); // Prints a summary of the bounds of the code cache
static void log_state(outputStream* st);
// The full limits of the codeCache
static address low_bound() { return (address) _heap->low_boundary(); }
@ -159,7 +160,7 @@ class CodeCache : AllStatic {
static size_t max_capacity() { return _heap->max_capacity(); }
static size_t unallocated_capacity() { return _heap->unallocated_capacity(); }
static size_t largest_free_block() { return _heap->largest_free_block(); }
static bool needs_flushing() { return unallocated_capacity() < CodeCacheFlushingMinimumFreeSpace; }
static bool needs_flushing() { return largest_free_block() < CodeCacheFlushingMinimumFreeSpace; }
static bool needs_cache_clean() { return _needs_cache_clean; }
static void set_needs_cache_clean(bool v) { _needs_cache_clean = v; }

2
hotspot/src/share/vm/code/nmethod.cpp
View file

@ -762,7 +762,7 @@ nmethod::nmethod(
void* nmethod::operator new(size_t size, int nmethod_size) {
// Always leave some room in the CodeCache for I2C/C2I adapters
if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL;
if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) return NULL;
return CodeCache::allocate(nmethod_size);
}