XBT_PRIVATE smx_activity_t SIMIX_execution_parallel_start(const char *name,
int host_nb, sg_host_t *host_list,
double *flops_amount, double *bytes_amount,
XBT_PRIVATE smx_activity_t SIMIX_execution_parallel_start(const char *name,
int host_nb, sg_host_t *host_list,
double *flops_amount, double *bytes_amount,