преобразовать PMID в имя метрики производительности (translate a PMID to a performance metric name)
Имя (Name)
pmNameID - translate a PMID to a performance metric name
Синопсис C (C Synopsis)
#include <pcp/pmapi.h>
int pmNameID(pmID pmid, char **name);
cc ... -lpcp
Описание (Description)
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 pmnameID.
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.
Диагностика (Diagnostic)
PM_ERR_NOPMNS
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
pmNewContext(3)).
PM_ERR_PMID
pmid does not correspond to a defined PMID in the PMNS.
PM_ERR_*
Other diagnostics are for protocol failures when accessing
the distributed PMNS.
Смотри также (See also)
PMAPI(3), pmGetChildren(3), pmGetChildrenStatus(3),
pmGetConfig(3), pmLoadASCIINameSpace(3), pmLoadNameSpace(3),
pmLookupName(3), pmNameAll(3), pmNewContext(3), pcp.conf(5),
pcp.env(5) and PMNS(5).
