Estimation Vector API

API functions (in DIET_server.h) are provided to:

• Store a value, associated with a tag, in the estimation vector. These functions are intended to be used in the SeD code:
  • int diet_est_set(estVector_t ev, int userTag, double value);
    int diet_est_array_set(estVector_t ev, int userTag, int idx, double value);
    int diet_est_set_str(estVector_t ev, int userTag, const char *value);
    int diet_est_set_bin(estVector_t ev, int userTag, const unsigned char *buf, size_t size);
• Retrieve the value associated with a tag from the estimation vector. These functions are intended to be used in a custom plugin scheduler code:
  • int double diet_est_get(estVectorConst_t ev, int userTag, double errVal);
    double diet_est_get_system(estVectorConst_t ev, int systemTag, double errVal);
    double diet_est_array_get(estVectorConst_t ev, int userTag, int idx, double errVal);
    double diet_est_array_get_system(estVectorConst_t ev, int systemTag, int idx, double errVal);
    const char* diet_est_get_str(estVectorConst_t ev, int userTag);
    const char* diet_est_get_str_system(estVectorConst_t ev, int systemTag);
    int diet_est_get_bin(estVectorConst_t ev, int userTag, const unsigned char **buf, size_t *size);
    int diet_est_get_bin_system(estVectorConst_t ev, int systemTag, const unsigned char **buf, size_t *size);
• Some auxiliary functions also allow getting some informations about particular values in the estimation vector:
  • int diet_est_defined(estVectorConst_t ev, int userTag);
    int diet_est_defined_system(estVectorConst_t ev, int systemTag);
    int diet_est_array_size(estVectorConst_t ev, int userTag);
    int diet_est_array_size_system(estVectorConst_t ev, int systemTag);
    int diet_est_array_defined(estVectorConst_t ev, int userTag, int idx);
    int diet_est_array_defined_system(estVectorConst_t ev, int systemTag, int idx);

Note that no function is provided to set a standard estimation tag, it is intended that cori sets these tags.

Tagged data are used to effect scheduling policies by defining custom server response aggregation methods, described in Section 9.3.6.