0e98fc1ccd
8253238: [REDO] Improve object array chunking test in G1's copy_to_survivor_space 8253236: [REDO] Investigate fast-path for scanning only objects with references during gc Generate multiple partial array tasks for large objArrays. Reviewed-by: sjohanss, ayang, tschatzl
88 lines
3.1 KiB
C++
88 lines
3.1 KiB
C++
/*
|
|
* Copyright (c) 2020, 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 "gc/shared/partialArrayTaskStepper.inline.hpp"
|
|
#include "memory/allStatic.hpp"
|
|
#include "unittest.hpp"
|
|
|
|
using Step = PartialArrayTaskStepper::Step;
|
|
using Stepper = PartialArrayTaskStepper;
|
|
|
|
class PartialArrayTaskStepper::TestSupport : AllStatic {
|
|
public:
|
|
static Step start(const Stepper* stepper,
|
|
int length,
|
|
int* to_length_addr,
|
|
uint chunk_size) {
|
|
return stepper->start_impl(length, to_length_addr, chunk_size);
|
|
}
|
|
|
|
static Step next(const Stepper* stepper,
|
|
int length,
|
|
int* to_length_addr,
|
|
uint chunk_size) {
|
|
return stepper->next_impl(length, to_length_addr, chunk_size);
|
|
}
|
|
};
|
|
|
|
using StepperSupport = PartialArrayTaskStepper::TestSupport;
|
|
|
|
static int simulate(const Stepper* stepper,
|
|
int length,
|
|
int* to_length_addr,
|
|
uint chunk_size) {
|
|
Step init = StepperSupport::start(stepper, length, to_length_addr, chunk_size);
|
|
uint queue_count = init._ncreate;
|
|
int task = 0;
|
|
for ( ; queue_count > 0; ++task) {
|
|
--queue_count;
|
|
Step step = StepperSupport::next(stepper, length, to_length_addr, chunk_size);
|
|
queue_count += step._ncreate;
|
|
}
|
|
return task;
|
|
}
|
|
|
|
static void run_test(int length, int chunk_size, uint n_workers) {
|
|
const PartialArrayTaskStepper stepper(n_workers);
|
|
int to_length;
|
|
int tasks = simulate(&stepper, length, &to_length, chunk_size);
|
|
ASSERT_EQ(length, to_length);
|
|
ASSERT_EQ(tasks, length / chunk_size);
|
|
}
|
|
|
|
TEST(PartialArrayTaskStepperTest, doit) {
|
|
for (int chunk_size = 50; chunk_size <= 500; chunk_size += 50) {
|
|
for (uint n_workers = 1; n_workers <= 256; n_workers = (n_workers * 3 / 2 + 1)) {
|
|
for (int length = 0; length <= 1000000; length = (length * 2 + 1)) {
|
|
run_test(length, chunk_size, n_workers);
|
|
}
|
|
// Ensure we hit boundary cases for length % chunk_size == 0.
|
|
for (uint i = 0; i < 2 * n_workers; ++i) {
|
|
run_test(i * chunk_size, chunk_size, n_workers);
|
|
}
|
|
}
|
|
}
|
|
}
|