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/* $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);
}
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