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/*
* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "classfile/systemDictionary.hpp"
#include "gc_interface/collectedHeap.inline.hpp"
#include "memory/permGen.hpp"
#include "memory/resourceArea.hpp"
#include "memory/space.hpp"
#include "oops/oop.inline.hpp"
#include "oops/oop.inline2.hpp"
#include "runtime/aprofiler.hpp"
bool AllocationProfiler::_active = false;
GrowableArray<klassOop>* AllocationProfiler::_print_array = NULL;
class AllocProfClosure : public ObjectClosure {
public:
void do_object(oop obj) {
Klass* k = obj->blueprint();
k->set_alloc_count(k->alloc_count() + 1);
k->set_alloc_size(k->alloc_size() + obj->size());
}
};
#ifndef PRODUCT
class AllocProfResetClosure : public ObjectClosure {
public:
void do_object(oop obj) {
if (obj->is_klass()) {
Klass* k = Klass::cast(klassOop(obj));
k->set_alloc_count(0);
k->set_alloc_size(0);
}
}
};
#endif
void AllocationProfiler::iterate_since_last_gc() {
if (is_active()) {
AllocProfClosure blk;
GenCollectedHeap* heap = GenCollectedHeap::heap();
heap->object_iterate_since_last_GC(&blk);
}
}
void AllocationProfiler::engage() {
_active = true;
}
void AllocationProfiler::disengage() {
_active = false;
}
void AllocationProfiler::add_class_to_array(klassOop k) {
_print_array->append(k);
}
void AllocationProfiler::add_classes_to_array(klassOop k) {
// Iterate over klass and all array klasses for klass
k->klass_part()->with_array_klasses_do(&AllocationProfiler::add_class_to_array);
}
int AllocationProfiler::compare_classes(klassOop* k1, klassOop* k2) {
// Sort by total allocation size
return (*k2)->klass_part()->alloc_size() - (*k1)->klass_part()->alloc_size();
}
int AllocationProfiler::average(size_t alloc_size, int alloc_count) {
return (int) ((double) (alloc_size * BytesPerWord) / MAX2(alloc_count, 1) + 0.5);
}
void AllocationProfiler::sort_and_print_array(size_t cutoff) {
_print_array->sort(&AllocationProfiler::compare_classes);
tty->print_cr("________________Size"
"__Instances"
"__Average"
"__Class________________");
size_t total_alloc_size = 0;
int total_alloc_count = 0;
for (int index = 0; index < _print_array->length(); index++) {
klassOop k = _print_array->at(index);
size_t alloc_size = k->klass_part()->alloc_size();
if (alloc_size > cutoff) {
int alloc_count = k->klass_part()->alloc_count();
#ifdef PRODUCT
const char* name = k->klass_part()->external_name();
#else
const char* name = k->klass_part()->internal_name();
#endif
tty->print_cr("%20u %10u %8u %s",
alloc_size * BytesPerWord,
alloc_count,
average(alloc_size, alloc_count),
name);
total_alloc_size += alloc_size;
total_alloc_count += alloc_count;
}
}
tty->print_cr("%20u %10u %8u --total--",
total_alloc_size * BytesPerWord,
total_alloc_count,
average(total_alloc_size, total_alloc_count));
tty->cr();
}
void AllocationProfiler::print(size_t cutoff) {
ResourceMark rm;
assert(!is_active(), "AllocationProfiler cannot be active while printing profile");
tty->cr();
tty->print_cr("Allocation profile (sizes in bytes, cutoff = %ld bytes):", cutoff * BytesPerWord);
tty->cr();
// Print regular instance klasses and basic type array klasses
_print_array = new GrowableArray<klassOop>(SystemDictionary::number_of_classes()*2);
SystemDictionary::classes_do(&add_classes_to_array);
Universe::basic_type_classes_do(&add_classes_to_array);
sort_and_print_array(cutoff);
#ifndef PRODUCT
tty->print_cr("Allocation profile for system classes (sizes in bytes, cutoff = %d bytes):", cutoff * BytesPerWord);
tty->cr();
// Print system klasses (methods, symbols, constant pools, etc.)
_print_array = new GrowableArray<klassOop>(64);
Universe::system_classes_do(&add_classes_to_array);
sort_and_print_array(cutoff);
tty->print_cr("Permanent generation dump (sizes in bytes, cutoff = %d bytes):", cutoff * BytesPerWord);
tty->cr();
AllocProfResetClosure resetblk;
Universe::heap()->permanent_object_iterate(&resetblk);
AllocProfClosure blk;
Universe::heap()->permanent_object_iterate(&blk);
_print_array = new GrowableArray<klassOop>(SystemDictionary::number_of_classes()*2);
SystemDictionary::classes_do(&add_classes_to_array);
Universe::basic_type_classes_do(&add_classes_to_array);
Universe::system_classes_do(&add_classes_to_array);
sort_and_print_array(cutoff);
#endif
}
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