pmnameid(3) [centos man page]
PMNAMEID(3) Library Functions Manual PMNAMEID(3) NAME
pmNameID - translate a PMID to a performance metric name C SYNOPSIS
#include <pcp/pmapi.h> int pmNameID(pmID pmid, char **name); cc ... -lpcp DESCRIPTION
Given a Performance Metric ID (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. name is a null-byte terminated string, allocated by pmNameID using malloc(3C) and it is the caller's responsibility to call free(3C) to release the storage when the value is no longer required. In the absence of errors, pmNameID returns zero. 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). DIAGNOSTICS
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. Performance Co-Pilot PCP PMNAMEID(3)
Check Out this Related Man Page
PMLOADNAMESPACE(3) Library Functions Manual PMLOADNAMESPACE(3) NAME
pmLoadNameSpace - load a local PMNS for an application C SYNOPSIS
#include <pcp/pmapi.h> int pmLoadNameSpace(const char *filename); cc ... -lpcp DESCRIPTION
If the application wants to force using a local Performance Metrics Name Space (PMNS) instead of a distributed PMNS then it must load the PMNS using pmLoadNameSpace or pmLoadASCIINameSpace(3). If the application is to use a distributed PMNS, then it should NOT make a call to load the PMNS explicitly. The filename argument designates the PMNS of interest. For applications not requiring a tailored PMNS, the special value PM_NS_DEFAULT may be used for filename, to force the default local PMNS to be loaded. The default local PMNS is found in the file $PCP_VAR_DIR/pmns/root unless the environment variable PMNS_DEFAULT is set, in which case the value is assumed to be the pathname to the file containing the default local PMNS. Externally a PMNS is stored in an ASCII format as described in pmns(5). By default, multiple names in the PMNS are not allowed to be associated with a single Performance Metrics Identifier (PMID). pmLoadASCI- INameSpace(3) provides an alternative interface with user-defined control over the processing of duplicate PMIDs in the PMNS. pmLoadNameSpace returns zero on success. FILES
$PCP_VAR_DIR/pmns/root the default local PMNS, when the environment variable PMNS_DEFAULT is unset PCP ENVIRONMENT
Environment variables with the prefix PCP_ are used to parameterize the file and directory names used by PCP. On each installation, the file /etc/pcp.conf contains the local values for these variables. The $PCP_CONF variable may be used to specify an alternative configura- tion file, as described in pcp.conf(5). Values for these variables may be obtained programmatically using the pmGetConfig(3) function. SEE ALSO
PMAPI(3), pmGetConfig(3), pmLoadASCIINameSpace(3), pmTrimNameSpace(3), pcp.conf(5), pcp.env(5) and pmns(5). DIAGNOSTICS
Syntax and other errors in the parsing of the PMNS are reported on stderr with a message of the form ``Error Parsing ASCII PMNS: ...''. PM_ERR_DUPPMNS It is an error to try and load more than one PMNS, or to call either pmLoadNameSpace and/or pmLoadASCIINameSpace(3) more than once. PM_ERR_PMNS Syntax error in the PMNS file. Performance Co-Pilot PCP PMLOADNAMESPACE(3)