| /* |
| * Copyright (c) 2018, 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 "runtime/os.hpp" |
| #include "utilities/ostream.hpp" |
| #include "utilities/spinYield.hpp" |
| #include "unittest.hpp" |
| |
| // Some basic tests of SpinYield, using comparison of report output with |
| // expected results to verify state. This is all very hard-wired to the |
| // current implementation of SpinYield, esp. the report function. |
| |
| static void check_report(const SpinYield* spinner, const char* expected) { |
| char buffer[100]; |
| stringStream s(buffer, sizeof(buffer)); |
| spinner->report(&s); |
| ASSERT_STREQ(expected, buffer); |
| } |
| |
| TEST(SpinYield, no_waiting) { |
| SpinYield spinner; |
| check_report(&spinner, "no waiting"); |
| } |
| |
| TEST(SpinYield, one_wait) { |
| SpinYield spinner(100); |
| spinner.wait(); |
| check_report(&spinner, os::is_MP() ? "spins = 1" : "yields = 1"); |
| } |
| |
| TEST(SpinYield, ten_waits) { |
| SpinYield spinner(100, 100); |
| for (unsigned i = 0; i < 10; ++i) { |
| spinner.wait(); |
| } |
| check_report(&spinner, os::is_MP() ? "spins = 10" : "yields = 10"); |
| } |
| |
| TEST(SpinYield, two_yields) { |
| SpinYield spinner(0, 10); |
| spinner.wait(); |
| spinner.wait(); |
| check_report(&spinner, "yields = 2"); |
| } |
| |
| TEST_VM(SpinYield, one_sleep) { |
| SpinYield spinner(0, 0); |
| spinner.wait(); |
| |
| char buffer[100]; |
| stringStream s(buffer, sizeof(buffer)); |
| spinner.report(&s); |
| |
| const char* expected = "sleep = "; |
| ASSERT_TRUE(strncmp(expected, buffer, strlen(expected)) == 0); |
| } |
| |
| TEST_VM(SpinYield, one_spin_one_sleep) { |
| SpinYield spinner(1, 0); |
| spinner.wait(); |
| spinner.wait(); |
| |
| char buffer[100]; |
| stringStream s(buffer, sizeof(buffer)); |
| spinner.report(&s); |
| |
| const char* expected_MP = "spins = 1, sleep = "; |
| const char* expected_UP = "sleep = "; |
| const char* expected = os::is_MP() ? expected_MP : expected_UP; |
| ASSERT_TRUE(strncmp(expected, buffer, strlen(expected)) == 0); |
| } |