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/* $Id: tstTime-2.cpp $ */
/** @file
* IPRT Testcase - Simple RTTime test.
*/
/*
* 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/stream.h>
#include <iprt/initterm.h>
#include <iprt/thread.h>
#include <VBox/sup.h>
/* HACK ALERT! */
#if defined(RT_OS_DARWIN) && defined(RT_ARCH_ARM64)
# undef RTTimeNanoTSWorkerName
# define RTTimeNanoTSWorkerName() "system"
#endif
int main()
{
unsigned cErrors = 0;
int i;
RTR3InitExeNoArguments(RTR3INIT_FLAGS_SUPLIB);
RTPrintf("tstTime-2: TESTING...\n");
/*
* RTNanoTimeTS() shall never return something which
* is less or equal to the return of the previous call.
*/
RTTimeSystemNanoTS(); RTTimeNanoTS(); RTThreadYield();
uint64_t u64RTStartTS = RTTimeNanoTS();
uint64_t u64OSStartTS = RTTimeSystemNanoTS();
#define NUMBER_OF_CALLS (100*_1M)
for (i = 0; i < NUMBER_OF_CALLS; i++)
RTTimeNanoTS();
uint64_t u64RTElapsedTS = RTTimeNanoTS();
uint64_t u64OSElapsedTS = RTTimeSystemNanoTS();
u64RTElapsedTS -= u64RTStartTS;
u64OSElapsedTS -= u64OSStartTS;
int64_t i64Diff = u64OSElapsedTS >= u64RTElapsedTS ? u64OSElapsedTS - u64RTElapsedTS : u64RTElapsedTS - u64OSElapsedTS;
if (i64Diff > (int64_t)(u64OSElapsedTS / 1000))
{
RTPrintf("tstTime-2: error: total time differs too much! u64OSElapsedTS=%#llx u64RTElapsedTS=%#llx delta=%lld\n",
u64OSElapsedTS, u64RTElapsedTS, u64OSElapsedTS - u64RTElapsedTS);
cErrors++;
}
else
RTPrintf("tstTime-2: total time difference: u64OSElapsedTS=%#llx u64RTElapsedTS=%#llx delta=%lld\n",
u64OSElapsedTS, u64RTElapsedTS, u64OSElapsedTS - u64RTElapsedTS);
RTPrintf("tstTime-2: %'u calls to RTTimeNanoTS in %'lluns -> %'llu calls/sec (%s)\n",
NUMBER_OF_CALLS, u64RTElapsedTS, (uint64_t)(NUMBER_OF_CALLS / ((double)u64RTElapsedTS / RT_NS_1SEC)), RTTimeNanoTSWorkerName());
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86) /** @todo This isn't really x86 or AMD64 specific... */
RTPrintf("tstTime-2: RTTimeDbgSteps -> %u (%d ppt)\n", RTTimeDbgSteps(), ((uint64_t)RTTimeDbgSteps() * 1000) / NUMBER_OF_CALLS);
RTPrintf("tstTime-2: RTTimeDbgExpired -> %u (%d ppt)\n", RTTimeDbgExpired(), ((uint64_t)RTTimeDbgExpired() * 1000) / NUMBER_OF_CALLS);
RTPrintf("tstTime-2: RTTimeDbgBad -> %u (%d ppt)\n", RTTimeDbgBad(), ((uint64_t)RTTimeDbgBad() * 1000) / NUMBER_OF_CALLS);
RTPrintf("tstTime-2: RTTimeDbgRaces -> %u (%d ppt)\n", RTTimeDbgRaces(), ((uint64_t)RTTimeDbgRaces() * 1000) / NUMBER_OF_CALLS);
#endif
if (!cErrors)
RTPrintf("tstTime-2: SUCCESS\n");
else
RTPrintf("tstTime-2: FAILURE - %d errors\n", cErrors);
return !!cErrors;
}
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