MPI_T_pvar_get_info

Synopsis

int MPI_T_pvar_get_info(int pvar_index, char *name, int *name_len, int *verbosity,
    int *var_class, MPI_Datatype *datatype, MPI_T_enum *enumtype, char *desc,
    int *desc_len, int *binding, int *readonly, int *continuous, int *atomic)

Input/Output Parameters

name_len

length of the string and/or buffer for name (integer)

desc_len

length of the string and/or buffer for desc (integer)

Input Parameters

pvar_index

index of the performance variable to be queried between 0 and num_pvar-1 (integer)

Output Parameters

name

buffer to return the string containing the name of the performance variable (string)

verbosity

verbosity level of this variable (integer)

var_class

class of performance variable (integer)

datatype

MPI type of the information stored in the performance variable (handle)

enumtype

optional descriptor for enumeration information (handle)

desc

buffer to return the string containing a description of the performance variable (string)

binding

type of MPI object to which this variable must be bound (integer)

readonly

flag indicating whether the variable can be written/reset (integer)

continuous

flag indicating whether the variable can be started and stopped or is continuously active (integer)

atomic

flag indicating whether the variable can be atomically read and reset (integer)

Thread and Interrupt Safety

This routine is thread-safe. This means that this routine may be safely used by multiple threads without the need for any user-provided thread locks. However, the routine is not interrupt safe. Typically, this is due to the use of memory allocation routines such as malloc or other non-MPICH runtime routines that are themselves not interrupt-safe.

Errors

All MPI routines (except MPI_Wtime and MPI_Wtick) return an error value; C routines as the value of the function and Fortran routines in the last argument. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with MPI_Comm_set_errhandler (for communicators), MPI_File_set_errhandler (for files), and MPI_Win_set_errhandler (for RMA windows). The MPI-1 routine MPI_Errhandler_set may be used but its use is deprecated. The predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can continue past an error; however, MPI implementations will attempt to continue whenever possible.

MPI_SUCCESS

No error; MPI routine completed successfully.

MPI_T_ERR_NOT_INITIALIZED

The MPI tool information interface is not initialized.

MPI_T_ERR_INVALID_INDEX

Index is invalid or has been deleted.