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pmIDStr

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.

SEE ALSO

PMAPI(3), pmGetConfig(3), pmInDomStr(3), pmLookupDesc(3), pcp.conf(4) and pcp.env(4).