XBT_PUBLIC(int) smpi_sample_1(int global, const char *file, int line,
int iters, double threshold);
XBT_PUBLIC(int) smpi_sample_2(int global, const char *file, int line);
XBT_PUBLIC(int) smpi_sample_1(int global, const char *file, int line,
int iters, double threshold);
XBT_PUBLIC(int) smpi_sample_2(int global, const char *file, int line);