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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*============================================================
**
** Source:
**
** Source : test1.c
**
** Purpose: Test for QueryThreadCycleTime() function
**
**
**=========================================================*/
#include <palsuite.h>
int __cdecl main(int argc, char *argv[]) {
int ret = FAIL;
//Test is failing unreliably, so for now we always return pass.
if (TRUE){
ret = PASS;
goto EXIT;
}
LONG64 Actual, Expected, Delta = 850000000;
Actual = 0;
Expected = 0;
const LONG64 MSEC_TO_NSEC = 1000000;
/*
* Initialize the PAL and return FAILURE if this fails
*/
if(0 != (PAL_Initialize(argc, argv)))
{
return FAIL;
}
HANDLE cThread = GetCurrentThread();
int i;
/* Take 2000 tiny measurements */
for (i = 0; i < 2000; i++){
ULONG64 FirstCount, SecondCount;
LONG64 Init;
Sleep(1);
/* Grab a FirstCount, then loop for a bit to make the clock increase */
if (!QueryThreadCycleTime(cThread, (PULONG64)&FirstCount))
{
Fail("ERROR: QueryThreadCycleTime returned failure.\n");
}
LONG64 x;
/* Init is in milliseconds, so we will convert later */
Init = (LONG64)GetTickCount();
x = Init + 3;
volatile int counter;
do {
for (counter = 0; counter < 100000; counter++)
{
// spin to consume CPU time
}
} while (x > GetTickCount());
Expected += (GetTickCount() - Init) * MSEC_TO_NSEC;
/* Get a second count */
if (!QueryThreadCycleTime(cThread, (PULONG64)&SecondCount))
{
Fail("ERROR: QueryThreadCycleTime returned failure.\n");
}
LONG64 trial = (LONG64)SecondCount - (LONG64)FirstCount;
if (trial < 0){
printf("Negative value %llu measured", trial);
}
Actual += (trial);
}
if(labs(Expected - Actual) > Delta)
{
Fail("ERROR: The measured time (%llu millisecs) was not within Delta %llu "
"of the expected time (%llu millisecs).\n",
(Actual / MSEC_TO_NSEC), (Delta / MSEC_TO_NSEC), (Expected / MSEC_TO_NSEC));
}
//printf("%llu, %llu\n", Expected, Actual);
PAL_Terminate();
ret = PASS;
EXIT:
return ret;
}
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