Win32 Performance Measurement Options
By Matthew Wilson, May 01, 2003
Win32 provides six main timing functions for profiling. We'll analyze them and present six corresponding performance counter classes that wrap these functions. Also included is a template class that manipulates instances of any of the six timing classes in order to provide scoped timing operations.
Listing 8 Extract from counter_cost.cpp
/* /////////////////////////////////////////////////////////////
* ...
*
* Extract from counter_cost.cpp
*
* Copyright (C) 2002, Synesis Software Pty Ltd.
* (Licensed under the Synesis Software Standard Source License:
* http://www.synesis.com.au/licenses/ssssl.html)
*
* ...
* ////////////////////////////////////////////////////////// */
#include <stdio.h>
#define _WINSTL_NO_NAMESPACES
#include <winstl.h>
#include <winstl_tick_counter.h>
#include <winstl_multimedia_counter.h>
#include <winstl_highperformance_counter.h>
#include <winstl_systemtime_counter.h>
#include <winstl_threadtimes_counter.h>
#include <winstl_processtimes_counter.h>
#include <winstl_performance_counter.h>
#include <winstl_performance_counter_scope.h>
#include <winstl_performance_counter_init.h>
/* //////////////////////////////////////////////////////////// */
const int C_ITERATIONS = 1000000;
/* //////////////////////////////////////////////////////////// */
typedef highperformance_counter application_counter_type;
template<
ws_typename_param_k C1
, ws_typename_param_k C2
>
inline ws_typename_type_k C1::interval_type
test_cost(C1 &app_counter, C2 &counter)
{
for(int i = 0; i < 2; ++i)
{
performance_counter_scope<C1> scope(app_counter);
for(int j = 0; j < C_ITERATIONS; ++j)
{
counter.start();
counter.stop();
}
}
return app_counter.get_milliseconds();
}
int main(int /* argc */, char* /* argv */[])
{
performance_counter_init<application_counter_type> app_counter;
#if defined(_STLSOFT_COMPILER_IS_BORLAND) || \
defined(_STLSOFT_COMPILER_IS_INTEL) || \
defined(_STLSOFT_COMPILER_IS_MSVC)
#define _counter_test_fmt "%I64d"
#else
#define _counter_test_fmt "%lld"
#endif /* compiler */
#define _test_counter(_x) \
do \
{ \
_x x; \
\
printf( #_x ": " _counter_test_fmt "us\n", \
test_cost(app_counter, x)); \
} \
while(0)
_test_counter(tick_counter);
_test_counter(multimedia_counter);
_test_counter(systemtime_counter);
_test_counter(highperformance_counter);
_test_counter(threadtimes_counter);
_test_counter(processtimes_counter);
_test_counter(performance_counter);
return 0;
}
