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8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions

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Reviewed-by: mgerdin, coleenp
This commit is contained in:
Jon Masamitsu 2013-02-12 14:15:45 -08:00
parent eafc00bc25
commit d72b516201
12 changed files with 398 additions and 175 deletions
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22
hotspot/src/share/vm/memory/metaspaceCounters.cpp
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@ -29,6 +29,16 @@
MetaspaceCounters* MetaspaceCounters::_metaspace_counters = NULL;
size_t MetaspaceCounters::calc_total_capacity() {
// The total capacity is the sum of
// 1) capacity of Metachunks in use by all Metaspaces
// 2) unused space at the end of each Metachunk
// 3) space in the freelist
size_t total_capacity = MetaspaceAux::allocated_capacity_bytes()
+ MetaspaceAux::free_bytes() + MetaspaceAux::free_chunks_total_in_bytes();
return total_capacity;
}
MetaspaceCounters::MetaspaceCounters() :
_capacity(NULL),
_used(NULL),
@ -36,8 +46,8 @@ MetaspaceCounters::MetaspaceCounters() :
if (UsePerfData) {
size_t min_capacity = MetaspaceAux::min_chunk_size();
size_t max_capacity = MetaspaceAux::reserved_in_bytes();
size_t curr_capacity = MetaspaceAux::capacity_in_bytes();
size_t used = MetaspaceAux::used_in_bytes();
size_t curr_capacity = calc_total_capacity();
size_t used = MetaspaceAux::allocated_used_bytes();
initialize(min_capacity, max_capacity, curr_capacity, used);
}
@ -82,15 +92,13 @@ void MetaspaceCounters::initialize(size_t min_capacity,
void MetaspaceCounters::update_capacity() {
assert(UsePerfData, "Should not be called unless being used");
assert(_capacity != NULL, "Should be initialized");
size_t capacity_in_bytes = MetaspaceAux::capacity_in_bytes();
_capacity->set_value(capacity_in_bytes);
size_t total_capacity = calc_total_capacity();
_capacity->set_value(total_capacity);
}
void MetaspaceCounters::update_used() {
assert(UsePerfData, "Should not be called unless being used");
assert(_used != NULL, "Should be initialized");
size_t used_in_bytes = MetaspaceAux::used_in_bytes();
size_t used_in_bytes = MetaspaceAux::allocated_used_bytes();
_used->set_value(used_in_bytes);
}