PMIDSTR(3)
NAME
pmIDStr - convert a performance metric identifier into a string
C SYNOPSIS
#include <pcp/pmapi.h>
const char *pmIDStr(pmID pmid)
cc ... -lpcp
DESCRIPTION
For use in error and diagnostic messages, return a `human readable'
version of the specified Performance Metric Identifier (PMID).
- Internally, a PMID is encoded as follows;
- typedef struct {
int pad:2;
unsigned int domain:8;
unsigned int cluster:12;
unsigned int item:10; - } __pmID_int;
- pmIDStr returns a string with each of the domain, cluster and item subfields appearing as decimal numbers, separated by periods.
- The string value is held in a single static buffer, so the returned value is only valid until the next call to pmIDStr.
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 configuration file, as described in pcp.conf(4). Values for these variables may be obtained programatically using the pmGetConfig(3) function.