MPI_T_category_get_info(3)

Usage

C Syntax

#include <mpi.h>
int MPI_T_category_get_info(int cat_index, char *name, int *name_len,
char *desc, int *desc_len, int *num_cvars, int *num_pvars,
int *num_categories)

MPI_T_category_get_info — Query information from a category

Input parameters

•: cat_index: Index of the category to be queried.

Input/output parameters

`•`	`name_len`: Length of the string and/or buffer for name.
`•`	`desc_len`: Length of the string and/or buffer for desc.

Output parameters

`•`	`name`: Buffer to return the string containing the name of the category.
`•`	`desc`: Buffer to return the string containing the description of the category.
`•`	`num_cvars`: Number of control variables in the category.
`•`	`num_pvars`: Number of performance variables in the category.
`•`	`num_categories`: Number of categories contained in the category.

Overview

MPI_T_category_get_info can be used to query information from a category. The function returns the number of control variables, performance variables, and sub-categories in the queried category in the arguments num_cvars, num_pvars, and num_categories, respectively.

Notes

This MPI tool interface function returns two strings. This function takes two argument for each string: a buffer to store the string, and a length which must initially specify the size of the buffer. If the length passed is n then this function will copy at most n - 1 characters of the string into the corresponding buffer and set the length to the number of characters copied - 1. If the length argument is NULL or the value specified in the length is 0 the corresponding string buffer is ignored and the string is not returned.

Errors

MPI_T_category_get_info will fail if:

`•`	`MPI_T_ERR_NOT_INITIALIZED`: The MPI Tools interface not initialized
`•`	`MPI_T_ERR_INVALID_INDEX`: The category index is invalid

Releases

5 releases since Debian 8 (Jessie); the text changed 4 times.

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Arch