Given a Performance Metric Identifier (PMID) via pmid, pmNameID will
determine the corresponding metric name, if any, in the Performance
Metrics Name Space (PMNS), and return this via name.
If the PMNS contains multiple names associated with the requested
PMID, one of these will be returned via name, but there is no way to
determine which of the duplicate names this will be. See
pmNameAll(3) if all of the corresponding names are required.
As of Version 3.10.3 of PCP, duplicate names for the same PMID are
allowed in the PMNS, so using pmNameAll(3) is recommended over
name is a null-byte terminated string, allocated by pmNameID using
malloc(3) and it is the caller's responsibility to call free(3) to
release the storage when the value is no longer required.
In the absence of errors, pmNameID returns zero.
Failed to access a PMNS for operation. Note that if the
application hasn't a priori called pmLoadNameSpace(3) and
wants to use the distributed PMNS, then a call to pmNameID
must be made after the creation of a context (see
PM_ERR_PMIDpmid does not correspond to a defined PMID in the PMNS.
Other diagnostics are for protocol failures when accessing the
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Performance Co-Pilot PCP PMNAMEID(3)