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.TH "MPI_T_PVAR_GET_NUM" "3" "Nov 01, 2026" "" "Open MPI"
.sp
MPI_T_pvar_get_num — Query the number of performance variables
.SH SYNTAX
.SS C Syntax
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.INDENT 3.5
.sp
.EX
#include <mpi.h>

int MPI_T_pvar_get_num(int *num_pvar)
.EE
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.SH OUTPUT PARAMETERS
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.IP \(bu 2
\fBnum_pvar\fP: Current number of performance variables.
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.SH DESCRIPTION
.sp
MPI_T_pvar_get_num can be used to query the current number of
performance variables. The number of performance variables may increase
throughout the execution of the process but will never decrease.
.SH ERRORS
.sp
MPI_T_pvar_get_num will fail if:
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.IP \(bu 2
\fBMPI_T_ERR_NOT_INITIALIZED\fP: The MPI Tools interface not initialized
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.SH Copyright
2003-2026, The Open MPI Community
.\" End of generated man page.