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8036698: Add trace event for updates to metaspace gc threshold

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Reviewed-by: stefank, mgerdin
This commit is contained in:
Erik Helin 2014-03-17 20:59:19 +01:00
parent 1fb0683664
commit 51584519f4
7 changed files with 177 additions and 14 deletions
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41
hotspot/src/share/vm/memory/metaspace.cpp
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@ -32,7 +32,9 @@
#include "memory/gcLocker.hpp"
#include "memory/metachunk.hpp"
#include "memory/metaspace.hpp"
#include "memory/metaspaceGCThresholdUpdater.hpp"
#include "memory/metaspaceShared.hpp"
#include "memory/metaspaceTracer.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
#include "runtime/atomic.inline.hpp"
@ -57,6 +59,7 @@ size_t const allocation_from_dictionary_limit = 4 * K;
MetaWord* last_allocated = 0;
size_t Metaspace::_compressed_class_space_size;
const MetaspaceTracer* Metaspace::_tracer = NULL;
// Used in declarations in SpaceManager and ChunkManager
enum ChunkIndex {
@ -1436,19 +1439,21 @@ void MetaspaceGC::compute_new_size() {
expand_bytes = align_size_up(expand_bytes, Metaspace::commit_alignment());
// Don't expand unless it's significant
if (expand_bytes >= MinMetaspaceExpansion) {
MetaspaceGC::inc_capacity_until_GC(expand_bytes);
}
if (PrintGCDetails && Verbose) {
size_t new_capacity_until_GC = capacity_until_GC;
gclog_or_tty->print_cr(" expanding:"
" minimum_desired_capacity: %6.1fKB"
" expand_bytes: %6.1fKB"
" MinMetaspaceExpansion: %6.1fKB"
" new metaspace HWM: %6.1fKB",
minimum_desired_capacity / (double) K,
expand_bytes / (double) K,
MinMetaspaceExpansion / (double) K,
new_capacity_until_GC / (double) K);
size_t new_capacity_until_GC = MetaspaceGC::inc_capacity_until_GC(expand_bytes);
Metaspace::tracer()->report_gc_threshold(capacity_until_GC,
new_capacity_until_GC,
MetaspaceGCThresholdUpdater::ComputeNewSize);
if (PrintGCDetails && Verbose) {
gclog_or_tty->print_cr(" expanding:"
" minimum_desired_capacity: %6.1fKB"
" expand_bytes: %6.1fKB"
" MinMetaspaceExpansion: %6.1fKB"
" new metaspace HWM: %6.1fKB",
minimum_desired_capacity / (double) K,
expand_bytes / (double) K,
MinMetaspaceExpansion / (double) K,
new_capacity_until_GC / (double) K);
}
}
return;
}
@ -1528,7 +1533,10 @@ void MetaspaceGC::compute_new_size() {
// Don't shrink unless it's significant
if (shrink_bytes >= MinMetaspaceExpansion &&
((capacity_until_GC - shrink_bytes) >= MetaspaceSize)) {
MetaspaceGC::dec_capacity_until_GC(shrink_bytes);
size_t new_capacity_until_GC = MetaspaceGC::dec_capacity_until_GC(shrink_bytes);
Metaspace::tracer()->report_gc_threshold(capacity_until_GC,
new_capacity_until_GC,
MetaspaceGCThresholdUpdater::ComputeNewSize);
}
}
@ -3132,6 +3140,7 @@ void Metaspace::global_initialize() {
}
MetaspaceGC::initialize();
_tracer = new MetaspaceTracer();
}
Metachunk* Metaspace::get_initialization_chunk(MetadataType mdtype,
@ -3220,8 +3229,12 @@ MetaWord* Metaspace::expand_and_allocate(size_t word_size, MetadataType mdtype)
assert(delta_bytes > 0, "Must be");
size_t after_inc = MetaspaceGC::inc_capacity_until_GC(delta_bytes);
// capacity_until_GC might be updated concurrently, must calculate previous value.
size_t before_inc = after_inc - delta_bytes;
tracer()->report_gc_threshold(before_inc, after_inc,
MetaspaceGCThresholdUpdater::ExpandAndAllocate);
if (PrintGCDetails && Verbose) {
gclog_or_tty->print_cr("Increase capacity to GC from " SIZE_FORMAT
" to " SIZE_FORMAT, before_inc, after_inc);