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8305716: Enhancements for printing age tables

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Reviewed-by: kdnilsen, ysr, tschatzl
This commit is contained in:
William Kemper 2023-04-19 07:43:36 +00:00 committed by Thomas Schatzl
parent ebba42ac52
commit 9fb53adfe0
2 changed files with 31 additions and 24 deletions
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50
src/hotspot/share/gc/shared/ageTable.cpp
View File

@ -33,15 +33,16 @@
#include "oops/oop.inline.hpp"
#include "runtime/perfData.hpp"
#include "utilities/copy.hpp"
#include "logging/logStream.hpp"
/* Copyright (c) 1992, 2021, Oracle and/or its affiliates, and Stanford University.
See the LICENSE file for license information. */
AgeTable::AgeTable(bool global) {
AgeTable::AgeTable(bool global) : _use_perf_data(UsePerfData && global) {
clear();
if (UsePerfData && global) {
if (_use_perf_data) {
ResourceMark rm;
EXCEPTION_MARK;
@ -70,7 +71,7 @@ void AgeTable::clear() {
}
}
void AgeTable::merge(AgeTable* subTable) {
void AgeTable::merge(const AgeTable* subTable) {
for (int i = 0; i < table_size; i++) {
sizes[i]+= subTable->sizes[i];
}
@ -105,25 +106,30 @@ uint AgeTable::compute_tenuring_threshold(size_t desired_survivor_size) {
}
void AgeTable::print_age_table(uint tenuring_threshold) {
if (log_is_enabled(Trace, gc, age) || UsePerfData || AgeTableTracer::is_tenuring_distribution_event_enabled()) {
log_trace(gc, age)("Age table with threshold %u (max threshold " UINTX_FORMAT ")",
tenuring_threshold, MaxTenuringThreshold);
size_t total = 0;
uint age = 1;
while (age < table_size) {
size_t wordSize = sizes[age];
total += wordSize;
if (wordSize > 0) {
log_trace(gc, age)("- age %3u: " SIZE_FORMAT_W(10) " bytes, " SIZE_FORMAT_W(10) " total",
age, wordSize * oopSize, total * oopSize);
}
AgeTableTracer::send_tenuring_distribution_event(age, wordSize * oopSize);
if (UsePerfData) {
_perf_sizes[age]->set_value(wordSize * oopSize);
}
age++;
}
LogTarget(Trace, gc, age) lt;
if (lt.is_enabled() || _use_perf_data || AgeTableTracer::is_tenuring_distribution_event_enabled()) {
LogStream st(lt);
print_on(&st, tenuring_threshold);
}
}
void AgeTable::print_on(outputStream* st, uint tenuring_threshold) {
st->print_cr("Age table with threshold %u (max threshold " UINTX_FORMAT ")",
tenuring_threshold, MaxTenuringThreshold);
size_t total = 0;
uint age = 1;
while (age < table_size) {
size_t word_size = sizes[age];
total += word_size;
if (word_size > 0) {
st->print_cr("- age %3u: " SIZE_FORMAT_W(10) " bytes, " SIZE_FORMAT_W(10) " total",
age, word_size * oopSize, total * oopSize);
}
AgeTableTracer::send_tenuring_distribution_event(age, word_size * oopSize);
if (_use_perf_data) {
_perf_sizes[age]->set_value(word_size * oopSize);
}
age++;
}
}

5
src/hotspot/share/gc/shared/ageTable.hpp
View File

@ -63,14 +63,15 @@ class AgeTable {
// Merge another age table with the current one. Used
// for parallel young generation gc.
void merge(AgeTable* subTable);
void merge(const AgeTable* subTable);
// Calculate new tenuring threshold based on age information.
uint compute_tenuring_threshold(size_t desired_survivor_size);
void print_age_table(uint tenuring_threshold);
void print_on(outputStream* st, uint tenuring_threshold);
private:
bool _use_perf_data;
PerfVariable* _perf_sizes[table_size];
};