GitHub-Proxy/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2025-08-12 19:59:05 +08:00
Code Issues Packages Projects Releases Wiki Activity

merge

Browse Source
This commit is contained in:
Gael Guennebaud 2010-02-22 11:09:05 +01:00
commit 1c6bdb4060
1 changed files with 74 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
bench/BenchTimer.h
View File

@ -23,24 +23,31 @@
// License and a copy of the GNU General Public License along with // License and a copy of the GNU General Public License along with
// Eigen. If not, see <http://www.gnu.org/licenses/>. // Eigen. If not, see <http://www.gnu.org/licenses/>.
#ifndef EIGEN_BENCH_TIMER_H #ifndef EIGEN_BENCH_TIMERR_H
#define EIGEN_BENCH_TIMER_H #define EIGEN_BENCH_TIMERR_H
#if defined(_WIN32) || defined(__CYGWIN__) #if defined(_WIN32) || defined(__CYGWIN__)
#define NOMINMAX #define NOMINMAX
#define WIN32_LEAN_AND_MEAN #define WIN32_LEAN_AND_MEAN
#include <windows.h> #include <windows.h>
#else #else
#include <sys/time.h>
#include <time.h> #include <time.h>
#include <unistd.h> #include <unistd.h>
#endif #endif
#include <cmath>
#include <cstdlib> #include <cstdlib>
#include <numeric> #include <numeric>
namespace Eigen namespace Eigen
{ {
enum {
CPU_TIMER = 0,
REAL_TIMER = 1
};
/** Elapsed time timer keeping the best try. /** Elapsed time timer keeping the best try.
* *
* On POSIX platforms we use clock_gettime with CLOCK_PROCESS_CPUTIME_ID. * On POSIX platforms we use clock_gettime with CLOCK_PROCESS_CPUTIME_ID.
@ -64,25 +71,46 @@ public:
~BenchTimer() {} ~BenchTimer() {}
inline void reset(void) {m_best = 1e6;} inline void reset()
inline void start(void) {m_start = getTime();}
inline void stop(void)
{ {
m_best = std::min(m_best, getTime() - m_start); m_bests.fill(1e9);
m_totals.setZero();
}
inline void start()
{
m_starts[CPU_TIMER] = getCpuTime();
m_starts[REAL_TIMER] = getRealTime();
}
inline void stop()
{
m_times[CPU_TIMER] = getCpuTime() - m_starts[CPU_TIMER];
m_times[REAL_TIMER] = getRealTime() - m_starts[REAL_TIMER];
m_bests = m_bests.cwiseMin(m_times);
m_totals += m_times;
} }
/** Return the best elapsed time in seconds. /** Return the elapsed time in seconds between the last start/stop pair
*/ */
inline double value(void) inline double value(int TIMER = CPU_TIMER)
{ {
return m_best; return m_times[TIMER];
} }
#if defined(_WIN32) || defined(__CYGWIN__) /** Return the best elapsed time in seconds
inline double getTime(void) */
#else inline double best(int TIMER = CPU_TIMER)
static inline double getTime(void) {
#endif return m_bests[TIMER];
}
/** Return the total elapsed time in seconds.
*/
inline double total(int TIMER = CPU_TIMER)
{
return m_totals[TIMER];
}
inline double getCpuTime()
{ {
#ifdef WIN32 #ifdef WIN32
LARGE_INTEGER query_ticks; LARGE_INTEGER query_ticks;
@ -95,14 +123,41 @@ public:
#endif #endif
} }
inline double getRealTime()
{
#ifdef WIN32
// TODO
return getCputime;
#else
struct timeval tv;
struct timezone tz;
gettimeofday(&tv, &tz);
return (double)tv.tv_sec + 1.e-6 * (double)tv.tv_usec;
#endif
}
protected: protected:
#if defined(_WIN32) || defined(__CYGWIN__) #if defined(_WIN32) || defined(__CYGWIN__)
double m_frequency; double m_frequency;
#endif #endif
double m_best, m_start; Vector2d m_starts;
Vector2d m_times;
Vector2d m_bests;
Vector2d m_totals;
}; };
#define BENCH(TIMER,TRIES,REP,CODE) { \
TIMER.reset(); \
for(int uglyvarname1=0; uglyvarname1<TRIES; ++uglyvarname1){ \
TIMER.start(); \
for(int uglyvarname2=0; uglyvarname2<REP; ++uglyvarname2){ \
CODE; \
} \
TIMER.stop(); \
} \
}
} }
#endif // EIGEN_BENCH_TIMER_H #endif // EIGEN_BENCH_TIMERR_H