直接上代码：
#if defined(_WIN32) && defined(_MSC_VER)
#include <windows.h>
double abtic() {
__int64 freq;
__int64 clock;
QueryPerformanceFrequency( (LARGE_INTEGER *)&freq );
QueryPerformanceCounter( (LARGE_INTEGER *)&clock );
return (double)clock/freq*1000*1000;
}
#else
#include <time.h>
#include <sys/time.h>
double abtic() {
double result = 0.0;
struct timeval tv;
gettimeofday( &tv, NULL );
result = tv.tv_sec*1000*1000 + tv.tv_usec;
return result;
}
#endif /* _WIN32 */
使用方法：
double timer = abtic();
...
printf("%fms\n", (abtic()-timer)*0.001);
另外的调试宏。
#if 1 double timer; #define ABTMS timer=abtic();fprintf(stdout,"%4d ",__LINE__) #define ABTME fprintf(stdout,"%4d %8.8f\n",__LINE__,(abtic()-timer)/1000.0f) #define SYCH cudaDeviceSynchronize() #else #define ABTMS #define ABTME #define SYCH #endif