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Diffstat (limited to '')
-rw-r--r-- | src/VBox/Runtime/testcase/tstRTTime.cpp | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/VBox/Runtime/testcase/tstRTTime.cpp b/src/VBox/Runtime/testcase/tstRTTime.cpp new file mode 100644 index 00000000..fabdef91 --- /dev/null +++ b/src/VBox/Runtime/testcase/tstRTTime.cpp @@ -0,0 +1,150 @@ +/* $Id: tstRTTime.cpp $ */ +/** @file + * IPRT Testcase - Simple RTTime tests (requires GIP). + */ + +/* + * Copyright (C) 2006-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program 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 for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <iprt/time.h> + +#include <iprt/errcore.h> +#include <iprt/initterm.h> +#include <iprt/message.h> +#include <iprt/test.h> +#include <iprt/thread.h> + +int main() +{ + /* + * Init. + */ + RTTEST hTest; + RTEXITCODE rcExit = RTTestInitExAndCreate(0, NULL, RTR3INIT_FLAGS_SUPLIB, "tstRTTime", &hTest); + if (rcExit != RTEXITCODE_SUCCESS) + return rcExit; + RTTestBanner(hTest); + + /* + * RTNanoTimeTS() shall never return something which + * is less or equal to the return of the previous call. + */ + + /* Take down the start time of both sources, try get them w/o being rescheduled. */ + RTTimeSystemNanoTS(); RTTimeNanoTS(); RTThreadYield(); + uint64_t u64RTStartTS = RTTimeNanoTS(); + uint64_t u64OSStartTS = RTTimeSystemNanoTS(); + uint64_t const cNsMaxTolerance = 256 * RT_NS_1US; + for (unsigned cTries = 0; cTries < 32 && RTTimeNanoTS() - u64RTStartTS > cNsMaxTolerance; cTries++) + { + RTThreadYield(); + u64RTStartTS = RTTimeNanoTS(); + u64OSStartTS = RTTimeSystemNanoTS(); + } + + /* Test loop. */ + uint32_t i; + uint64_t u64Prev = RTTimeNanoTS(); + for (i = 0; i < 100*_1M; i++) + { + uint64_t u64 = RTTimeNanoTS(); + if (u64 <= u64Prev) + { + /** @todo wrapping detection. */ + RTTestFailed(hTest, "i=%#010x u64=%#llx u64Prev=%#llx (1)\n", i, u64, u64Prev); + if (RTTestErrorCount(hTest) >= 256) + break; + RTThreadYield(); + u64 = RTTimeNanoTS(); + } + else if (u64 - u64Prev > 1000000000 /* 1sec */) + { + RTTestFailed(hTest, "i=%#010x u64=%#llx u64Prev=%#llx delta=%lld\n", i, u64, u64Prev, u64 - u64Prev); + if (RTTestErrorCount(hTest) >= 256) + break; + RTThreadYield(); + u64 = RTTimeNanoTS(); + } + if (!(i & (_1M*2 - 1))) + { + RTTestPrintf(hTest, RTTESTLVL_INFO, "i=%#010x u64=%#llx u64Prev=%#llx delta=%lld\n", i, u64, u64Prev, u64 - u64Prev); + RTThreadYield(); + u64 = RTTimeNanoTS(); + } + u64Prev = u64; + } + + /* Take down the stop time of both sources, again try get them w/o being rescheduled. */ + RTTimeSystemNanoTS(); RTTimeNanoTS(); RTThreadYield(); + uint64_t u64RTElapsedTS = RTTimeNanoTS(); + uint64_t u64OSElapsedTS = RTTimeSystemNanoTS(); + for (unsigned cTries = 0; cTries < 32 && RTTimeNanoTS() - u64RTElapsedTS > cNsMaxTolerance; cTries++) + { + RTThreadYield(); + u64RTElapsedTS = RTTimeNanoTS(); + u64OSElapsedTS = RTTimeSystemNanoTS(); + } + u64RTElapsedTS -= u64RTStartTS; + u64OSElapsedTS -= u64OSStartTS; + + /* Check the runtime difference between the two sources. */ + int64_t i64Diff = u64OSElapsedTS >= u64RTElapsedTS ? u64OSElapsedTS - u64RTElapsedTS : u64RTElapsedTS - u64OSElapsedTS; + if (i64Diff > (int64_t)(RT_MAX(u64OSElapsedTS / 1000, cNsMaxTolerance))) + RTTestFailed(hTest, "total time differs too much! u64OSElapsedTS=%#llx u64RTElapsedTS=%#llx delta=%lld\n", + u64OSElapsedTS, u64RTElapsedTS, u64OSElapsedTS - u64RTElapsedTS); + else + { + if (u64OSElapsedTS >= u64RTElapsedTS) + RTTestValue(hTest, "Total time delta", u64OSElapsedTS - u64RTElapsedTS, RTTESTUNIT_NS); + else + RTTestValue(hTest, "Total time delta", u64RTElapsedTS - u64OSElapsedTS, RTTESTUNIT_NS); + RTTestPrintf(hTest, RTTESTLVL_INFO, "total time difference: u64OSElapsedTS=%#llx u64RTElapsedTS=%#llx delta=%lld\n", + u64OSElapsedTS, u64RTElapsedTS, u64OSElapsedTS - u64RTElapsedTS); + } + + /* Report debug details: */ +#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86) /** @todo This isn't really x86 or AMD64 specific... */ + RTTestValue(hTest, "RTTimeDbgSteps", RTTimeDbgSteps(), RTTESTUNIT_OCCURRENCES); + RTTestValue(hTest, "RTTimeDbgSteps pp", ((uint64_t)RTTimeDbgSteps() * 1000) / i, RTTESTUNIT_PP1K); + RTTestValue(hTest, "RTTimeDbgExpired", RTTimeDbgExpired(), RTTESTUNIT_OCCURRENCES); + RTTestValue(hTest, "RTTimeDbgExpired pp", ((uint64_t)RTTimeDbgExpired() * 1000) / i, RTTESTUNIT_PP1K); + RTTestValue(hTest, "RTTimeDbgBad", RTTimeDbgBad(), RTTESTUNIT_OCCURRENCES); + RTTestValue(hTest, "RTTimeDbgBad pp", ((uint64_t)RTTimeDbgBad() * 1000) / i, RTTESTUNIT_PP1K); + RTTestValue(hTest, "RTTimeDbgRaces", RTTimeDbgRaces(), RTTESTUNIT_OCCURRENCES); + RTTestValue(hTest, "RTTimeDbgRaces pp", ((uint64_t)RTTimeDbgRaces() * 1000) / i, RTTESTUNIT_PP1K); +#endif + + return RTTestSummaryAndDestroy(hTest); +} |