/*
* Copyright (c) 2018, 2024, 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 "memory/virtualspace.hpp"
#include "oops/oop.hpp"
#include "runtime/os.hpp"
#include "utilities/align.hpp"
#include "concurrentTestRunner.inline.hpp"
#include "unittest.hpp"
namespace {
class MemoryReleaser {
ReservedSpace* const _rs;
public:
MemoryReleaser(ReservedSpace* rs) : _rs(rs) { }
~MemoryReleaser() {
if (_rs->special()) {
EXPECT_TRUE(os::release_memory_special(_rs->base(), _rs->size()));
} else {
EXPECT_TRUE(os::release_memory(_rs->base(), _rs->size()));
}
}
};
static void small_page_write(void* addr, size_t size) {
size_t page_size = os::vm_page_size();
char* end = (char*) addr + size;
for (char* p = (char*) addr; p < end; p += page_size) {
*p = 1;
}
}
// have to use these functions, as gtest's _PRED macros don't like is_aligned
// nor (is_aligned<size_t, size_t>)
static bool is_size_aligned(size_t size, size_t alignment) {
return is_aligned(size, alignment);
}
static bool is_ptr_aligned(void* ptr, size_t alignment) {
return is_aligned(ptr, alignment);
}
static void test_reserved_size(size_t size) {
ASSERT_PRED2(is_size_aligned, size, os::vm_allocation_granularity());
ReservedSpace rs(size);
MemoryReleaser releaser(&rs);
EXPECT_TRUE(rs.base() != nullptr) << "rs.special: " << rs.special();
EXPECT_EQ(size, rs.size()) << "rs.special: " << rs.special();
if (rs.special()) {
small_page_write(rs.base(), size);
}
}
static void test_reserved_size_alignment(size_t size, size_t alignment) {
ASSERT_PRED2(is_size_aligned, size, alignment) << "Incorrect input parameters";
size_t page_size = UseLargePages ? os::large_page_size() : os::vm_page_size();
ReservedSpace rs(size, alignment, page_size, (char *) nullptr);
ASSERT_TRUE(rs.base() != nullptr) << "rs.special = " << rs.special();
ASSERT_EQ(size, rs.size()) << "rs.special = " << rs.special();
EXPECT_PRED2(is_ptr_aligned, rs.base(), alignment)
<< "aligned sizes should always give aligned addresses";
EXPECT_PRED2(is_ptr_aligned, (void*) rs.size(), alignment)
<< "aligned sizes should always give aligned addresses";
if (rs.special()) {
small_page_write(rs.base(), size);
}
}
static void test_reserved_size_alignment_page_type(size_t size, size_t alignment, bool maybe_large) {
if (size < alignment) {
// Tests might set -XX:LargePageSizeInBytes=<small pages> and cause unexpected input arguments for this test.
ASSERT_EQ(os::vm_page_size(), os::large_page_size()) << "Test needs further refinement";
return;
}
ASSERT_PRED2(is_size_aligned, size, os::vm_allocation_granularity()) << "Must be at least AG aligned";
ASSERT_PRED2(is_size_aligned, size, alignment) << "Must be at least AG aligned";
bool large = maybe_large && UseLargePages && size >= os::large_page_size();
size_t page_size = large ? os::large_page_size() : os::vm_page_size();
ReservedSpace rs(size, alignment, page_size);
MemoryReleaser releaser(&rs);
EXPECT_TRUE(rs.base() != nullptr) << "rs.special: " << rs.special();
EXPECT_EQ(size, rs.size()) << "rs.special: " << rs.special();
if (rs.special()) {
small_page_write(rs.base(), size);
}
}
}
TEST_VM(ReservedSpace, size_alignment) {
size_t size = 2 * 1024 * 1024;
size_t ag = os::vm_allocation_granularity();
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size, ag));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size * 2, ag));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size * 10, ag));
}
TEST_VM(ReservedSpace, size) {
size_t size = 2 * 1024 * 1024;
size_t ag = os::vm_allocation_granularity();
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 1));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(ag));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size - ag));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size + ag));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2 - ag));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2 + ag));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3 - ag));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3 + ag));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10));
EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10 + size / 2));
}
TEST_VM(ReservedSpace, size_alignment_page_type) {
size_t ag = os::vm_allocation_granularity();
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag, ag , false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 2, ag , false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 3, ag , false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 2, ag * 2, false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 4, ag * 2, false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 8, ag * 2, false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 4, ag * 4, false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 8, ag * 4, false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 16, ag * 4, false));
}
TEST_VM(ReservedSpace, size_alignment_page_type_large_page) {
if (!UseLargePages) {
return;
}
size_t ag = os::vm_allocation_granularity();
size_t lp = os::large_page_size();
// Without large pages
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, ag * 4, false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, ag * 4, false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, ag * 4, false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, lp , false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp , false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 3, lp , false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp * 2, false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, lp * 2, false));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 8, lp * 2, false));
// With large pages
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, ag * 4 , true));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, ag * 4, true));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, ag * 4, true));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, lp , true));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp , true));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 3, lp , true));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp * 2, true));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, lp * 2, true));
EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 8, lp * 2, true));
}
namespace {
enum TestLargePages {
Default,
Disable,
Reserve,
Commit
};
class ReservedSpaceReleaser {
ReservedSpace* const _rs;
public:
ReservedSpaceReleaser(ReservedSpace* rs) : _rs(rs) { }
~ReservedSpaceReleaser() {
_rs->release();
}
};
ReservedSpace reserve_memory(size_t reserve_size_aligned, TestLargePages mode) {
switch(mode) {
default:
case Default:
case Reserve:
return ReservedSpace(reserve_size_aligned);
case Disable:
case Commit:
return ReservedSpace(reserve_size_aligned,
os::vm_allocation_granularity(),
os::vm_page_size());
}
}
bool initialize_virtual_space(VirtualSpace& vs, ReservedSpace rs, TestLargePages mode) {
switch(mode) {
default:
case Default:
case Reserve:
return vs.initialize(rs, 0);
case Disable:
return vs.initialize_with_granularity(rs, 0, os::vm_page_size());
case Commit:
return vs.initialize_with_granularity(rs, 0, os::page_size_for_region_unaligned(rs.size(), 1));
}
}
void test_virtual_space_actual_committed_space(size_t reserve_size, size_t commit_size,
TestLargePages mode = Default) {
size_t granularity = os::vm_allocation_granularity();
size_t reserve_size_aligned = align_up(reserve_size, granularity);
ReservedSpace reserved = reserve_memory(reserve_size_aligned, mode);
ReservedSpaceReleaser releaser(&reserved);
ASSERT_TRUE(reserved.is_reserved());
VirtualSpace vs;
ASSERT_TRUE(initialize_virtual_space(vs, reserved, mode)) << "Failed to initialize VirtualSpace";
vs.expand_by(commit_size, false);
if (vs.special()) {
EXPECT_EQ(reserve_size_aligned, vs.actual_committed_size());
} else {
EXPECT_GE(vs.actual_committed_size(), commit_size);
// Approximate the commit granularity.
// Make sure that we don't commit using large pages
// if large pages has been disabled for this VirtualSpace.
size_t commit_granularity = (mode == Disable || !UseLargePages) ?
os::vm_page_size() : os::large_page_size();
EXPECT_LT(vs.actual_committed_size(), commit_size + commit_granularity);
}
}
}
TEST_VM(VirtualSpace, actual_committed_space) {
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(4 * K, 0));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(4 * K, 4 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(8 * K, 0));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(8 * K, 4 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(8 * K, 8 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(12 * K, 0));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(12 * K, 4 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(12 * K, 8 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(12 * K, 12 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(64 * K, 0));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(64 * K, 32 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(64 * K, 64 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(2 * M, 0));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(2 * M, 4 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(2 * M, 64 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(2 * M, 1 * M));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(2 * M, 2 * M));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 0));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 4 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 8 * K));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 1 * M));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 2 * M));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 5 * M));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 10 * M));
}
TEST_VM(VirtualSpace, actual_committed_space_one_large_page) {
if (!UseLargePages) {
return;
}
size_t large_page_size = os::large_page_size();
ReservedSpace reserved(large_page_size, large_page_size, large_page_size);
ReservedSpaceReleaser releaser(&reserved);
ASSERT_TRUE(reserved.is_reserved());
VirtualSpace vs;
ASSERT_TRUE(vs.initialize(reserved, 0)) << "Failed to initialize VirtualSpace";
vs.expand_by(large_page_size, false);
EXPECT_EQ(large_page_size, vs.actual_committed_size());
}
TEST_VM(VirtualSpace, disable_large_pages) {
if (!UseLargePages) {
return;
}
// These test cases verify that if we force VirtualSpace to disable large pages
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 0, Disable));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 4 * K, Disable));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 8 * K, Disable));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 1 * M, Disable));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 2 * M, Disable));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 5 * M, Disable));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 10 * M, Disable));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 0, Reserve));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 4 * K, Reserve));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 8 * K, Reserve));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 1 * M, Reserve));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 2 * M, Reserve));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 5 * M, Reserve));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 10 * M, Reserve));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 0, Commit));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 4 * K, Commit));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 8 * K, Commit));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 1 * M, Commit));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 2 * M, Commit));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 5 * M, Commit));
EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 10 * M, Commit));
}
// ========================= concurrent virtual space memory tests
// This class have been imported from the original "internal VM test" with minor modification,
// specifically using GTest asserts instead of native HotSpot asserts.
class TestReservedSpace : AllStatic {
public:
static void small_page_write(void* addr, size_t size) {
size_t page_size = os::vm_page_size();
char* end = (char*)addr + size;
for (char* p = (char*)addr; p < end; p += page_size) {
*p = 1;
}
}
static void release_memory_for_test(ReservedSpace rs) {
if (rs.special()) {
EXPECT_TRUE(os::release_memory_special(rs.base(), rs.size()));
} else {
EXPECT_TRUE(os::release_memory(rs.base(), rs.size()));
}
}
static void test_reserved_space1(size_t size, size_t alignment) {
ASSERT_TRUE(is_aligned(size, alignment)) << "Incorrect input parameters";
size_t page_size = UseLargePages ? os::large_page_size() : os::vm_page_size();
ReservedSpace rs(size, // size
alignment, // alignment
page_size, // page size
(char *)nullptr); // requested_address
EXPECT_TRUE(rs.base() != nullptr);
EXPECT_EQ(rs.size(), size) << "rs.size: " << rs.size();
EXPECT_TRUE(is_aligned(rs.base(), alignment)) << "aligned sizes should always give aligned addresses";
EXPECT_TRUE(is_aligned(rs.size(), alignment)) << "aligned sizes should always give aligned addresses";
if (rs.special()) {
small_page_write(rs.base(), size);
}
release_memory_for_test(rs);
}
static void test_reserved_space2(size_t size) {
ASSERT_TRUE(is_aligned(size, os::vm_allocation_granularity())) << "Must be at least AG aligned";
ReservedSpace rs(size);
EXPECT_TRUE(rs.base() != nullptr);
EXPECT_EQ(rs.size(), size) << "rs.size: " << rs.size();
if (rs.special()) {
small_page_write(rs.base(), size);
}
release_memory_for_test(rs);
}
static void test_reserved_space3(size_t size, size_t alignment, bool maybe_large) {
if (size < alignment) {
// Tests might set -XX:LargePageSizeInBytes=<small pages> and cause unexpected input arguments for this test.
ASSERT_EQ(os::vm_page_size(), os::large_page_size()) << "Test needs further refinement";
return;
}
EXPECT_TRUE(is_aligned(size, os::vm_allocation_granularity())) << "Must be at least AG aligned";
EXPECT_TRUE(is_aligned(size, alignment)) << "Must be at least aligned against alignment";
bool large = maybe_large && UseLargePages && size >= os::large_page_size();
size_t page_size = large ? os::large_page_size() : os::vm_page_size();
ReservedSpace rs(size, alignment, page_size);
EXPECT_TRUE(rs.base() != nullptr);
EXPECT_EQ(rs.size(), size) << "rs.size: " << rs.size();
if (rs.special()) {
small_page_write(rs.base(), size);
}
release_memory_for_test(rs);
}
static void test_reserved_space1() {
size_t size = 2 * 1024 * 1024;
size_t ag = os::vm_allocation_granularity();
test_reserved_space1(size, ag);
test_reserved_space1(size * 2, ag);
test_reserved_space1(size * 10, ag);
}
static void test_reserved_space2() {
size_t size = 2 * 1024 * 1024;
size_t ag = os::vm_allocation_granularity();
test_reserved_space2(size * 1);
test_reserved_space2(size * 2);
test_reserved_space2(size * 10);
test_reserved_space2(ag);
test_reserved_space2(size - ag);
test_reserved_space2(size);
test_reserved_space2(size + ag);
test_reserved_space2(size * 2);
test_reserved_space2(size * 2 - ag);
test_reserved_space2(size * 2 + ag);
test_reserved_space2(size * 3);
test_reserved_space2(size * 3 - ag);
test_reserved_space2(size * 3 + ag);
test_reserved_space2(size * 10);
test_reserved_space2(size * 10 + size / 2);
}
static void test_reserved_space3() {
size_t ag = os::vm_allocation_granularity();
test_reserved_space3(ag, ag , false);
test_reserved_space3(ag * 2, ag , false);
test_reserved_space3(ag * 3, ag , false);
test_reserved_space3(ag * 2, ag * 2, false);
test_reserved_space3(ag * 4, ag * 2, false);
test_reserved_space3(ag * 8, ag * 2, false);
test_reserved_space3(ag * 4, ag * 4, false);
test_reserved_space3(ag * 8, ag * 4, false);
test_reserved_space3(ag * 16, ag * 4, false);
if (UseLargePages) {
size_t lp = os::large_page_size();
// Without large pages
test_reserved_space3(lp, ag * 4, false);
test_reserved_space3(lp * 2, ag * 4, false);
test_reserved_space3(lp * 4, ag * 4, false);
test_reserved_space3(lp, lp , false);
test_reserved_space3(lp * 2, lp , false);
test_reserved_space3(lp * 3, lp , false);
test_reserved_space3(lp * 2, lp * 2, false);
test_reserved_space3(lp * 4, lp * 2, false);
test_reserved_space3(lp * 8, lp * 2, false);
// With large pages
test_reserved_space3(lp, ag * 4 , true);
test_reserved_space3(lp * 2, ag * 4, true);
test_reserved_space3(lp * 4, ag * 4, true);
test_reserved_space3(lp, lp , true);
test_reserved_space3(lp * 2, lp , true);
test_reserved_space3(lp * 3, lp , true);
test_reserved_space3(lp * 2, lp * 2, true);
test_reserved_space3(lp * 4, lp * 2, true);
test_reserved_space3(lp * 8, lp * 2, true);
}
}
static void test_reserved_space() {
test_reserved_space1();
test_reserved_space2();
test_reserved_space3();
}
};
class TestVirtualSpace : AllStatic {
enum TestLargePages {
Default,
Disable,
Reserve,
Commit
};
static ReservedSpace reserve_memory(size_t reserve_size_aligned, TestLargePages mode) {
switch(mode) {
default:
case Default:
case Reserve:
return ReservedSpace(reserve_size_aligned);
case Disable:
case Commit:
return ReservedSpace(reserve_size_aligned,
os::vm_allocation_granularity(),
os::vm_page_size());
}
}
static bool initialize_virtual_space(VirtualSpace& vs, ReservedSpace rs, TestLargePages mode) {
switch(mode) {
default:
case Default:
case Reserve:
return vs.initialize(rs, 0);
case Disable:
return vs.initialize_with_granularity(rs, 0, os::vm_page_size());
case Commit:
return vs.initialize_with_granularity(rs, 0, os::page_size_for_region_unaligned(rs.size(), 1));
}
}
public:
static void test_virtual_space_actual_committed_space(size_t reserve_size, size_t commit_size,
TestLargePages mode = Default) {
size_t granularity = os::vm_allocation_granularity();
size_t reserve_size_aligned = align_up(reserve_size, granularity);
ReservedSpace reserved = reserve_memory(reserve_size_aligned, mode);
EXPECT_TRUE(reserved.is_reserved());
VirtualSpace vs;
bool initialized = initialize_virtual_space(vs, reserved, mode);
EXPECT_TRUE(initialized) << "Failed to initialize VirtualSpace";
vs.expand_by(commit_size, false);
if (vs.special()) {
EXPECT_EQ(vs.actual_committed_size(), reserve_size_aligned);
} else {
EXPECT_GE(vs.actual_committed_size(), commit_size);
// Approximate the commit granularity.
// Make sure that we don't commit using large pages
// if large pages has been disabled for this VirtualSpace.
size_t commit_granularity = (mode == Disable || !UseLargePages) ?
os::vm_page_size() : os::large_page_size();
EXPECT_LT(vs.actual_committed_size(), commit_size + commit_granularity);
}
reserved.release();
}
static void test_virtual_space_actual_committed_space_one_large_page() {
if (!UseLargePages) {
return;
}
size_t large_page_size = os::large_page_size();
ReservedSpace reserved(large_page_size, large_page_size, large_page_size);
EXPECT_TRUE(reserved.is_reserved());
VirtualSpace vs;
bool initialized = vs.initialize(reserved, 0);
EXPECT_TRUE(initialized) << "Failed to initialize VirtualSpace";
vs.expand_by(large_page_size, false);
EXPECT_EQ(vs.actual_committed_size(), large_page_size);
reserved.release();
}
static void test_virtual_space_actual_committed_space() {
test_virtual_space_actual_committed_space(4 * K, 0);
test_virtual_space_actual_committed_space(4 * K, 4 * K);
test_virtual_space_actual_committed_space(8 * K, 0);
test_virtual_space_actual_committed_space(8 * K, 4 * K);
test_virtual_space_actual_committed_space(8 * K, 8 * K);
test_virtual_space_actual_committed_space(12 * K, 0);
test_virtual_space_actual_committed_space(12 * K, 4 * K);
test_virtual_space_actual_committed_space(12 * K, 8 * K);
test_virtual_space_actual_committed_space(12 * K, 12 * K);
test_virtual_space_actual_committed_space(64 * K, 0);
test_virtual_space_actual_committed_space(64 * K, 32 * K);
test_virtual_space_actual_committed_space(64 * K, 64 * K);
test_virtual_space_actual_committed_space(2 * M, 0);
test_virtual_space_actual_committed_space(2 * M, 4 * K);
test_virtual_space_actual_committed_space(2 * M, 64 * K);
test_virtual_space_actual_committed_space(2 * M, 1 * M);
test_virtual_space_actual_committed_space(2 * M, 2 * M);
test_virtual_space_actual_committed_space(10 * M, 0);
test_virtual_space_actual_committed_space(10 * M, 4 * K);
test_virtual_space_actual_committed_space(10 * M, 8 * K);
test_virtual_space_actual_committed_space(10 * M, 1 * M);
test_virtual_space_actual_committed_space(10 * M, 2 * M);
test_virtual_space_actual_committed_space(10 * M, 5 * M);
test_virtual_space_actual_committed_space(10 * M, 10 * M);
}
static void test_virtual_space_disable_large_pages() {
if (!UseLargePages) {
return;
}
// These test cases verify that if we force VirtualSpace to disable large pages
test_virtual_space_actual_committed_space(10 * M, 0, Disable);
test_virtual_space_actual_committed_space(10 * M, 4 * K, Disable);
test_virtual_space_actual_committed_space(10 * M, 8 * K, Disable);
test_virtual_space_actual_committed_space(10 * M, 1 * M, Disable);
test_virtual_space_actual_committed_space(10 * M, 2 * M, Disable);
test_virtual_space_actual_committed_space(10 * M, 5 * M, Disable);
test_virtual_space_actual_committed_space(10 * M, 10 * M, Disable);
test_virtual_space_actual_committed_space(10 * M, 0, Reserve);
test_virtual_space_actual_committed_space(10 * M, 4 * K, Reserve);
test_virtual_space_actual_committed_space(10 * M, 8 * K, Reserve);
test_virtual_space_actual_committed_space(10 * M, 1 * M, Reserve);
test_virtual_space_actual_committed_space(10 * M, 2 * M, Reserve);
test_virtual_space_actual_committed_space(10 * M, 5 * M, Reserve);
test_virtual_space_actual_committed_space(10 * M, 10 * M, Reserve);
test_virtual_space_actual_committed_space(10 * M, 0, Commit);
test_virtual_space_actual_committed_space(10 * M, 4 * K, Commit);
test_virtual_space_actual_committed_space(10 * M, 8 * K, Commit);
test_virtual_space_actual_committed_space(10 * M, 1 * M, Commit);
test_virtual_space_actual_committed_space(10 * M, 2 * M, Commit);
test_virtual_space_actual_committed_space(10 * M, 5 * M, Commit);
test_virtual_space_actual_committed_space(10 * M, 10 * M, Commit);
}
static void test_virtual_space() {
test_virtual_space_actual_committed_space();
test_virtual_space_actual_committed_space_one_large_page();
test_virtual_space_disable_large_pages();
}
};
class ReservedSpaceRunnable : public TestRunnable {
public:
void runUnitTest() const {
TestReservedSpace::test_reserved_space();
}
};
TEST_VM(VirtualSpace, os_reserve_space_concurrent) {
ReservedSpaceRunnable runnable;
ConcurrentTestRunner testRunner(&runnable, 5, 3000);
testRunner.run();
}
class VirtualSpaceRunnable : public TestRunnable {
public:
void runUnitTest() const {
TestVirtualSpace::test_virtual_space();
}
};
TEST_VM(VirtualSpace, os_virtual_space_concurrent) {
VirtualSpaceRunnable runnable;
ConcurrentTestRunner testRunner(&runnable, 5, 3000);
testRunner.run();
}