timercray.c

求矩阵奇异分解svd算法

/* Cray-2 or Cray Y-MP Elapsed (User) CPU Time */
#include <time.h>
#include <sys/times.h>
float timer() {
   float scale;
   clock_t elapsed_time;
   struct tms mytime;
   scale = (float) CLK_TCK;
   times(&mytime);
   elapsed_time = mytime.tms_utime;
   return((float)elapsed_time/scale);
}