pmLoadNameSpace(3) — Linux manual page


PMLOADNAMESPACE(3)        Library Functions Manual        PMLOADNAMESPACE(3)

NAME         top

       pmLoadNameSpace - load a local PMNS for an application

C SYNOPSIS         top

       #include <pcp/pmapi.h>

       int pmLoadNameSpace(const char *filename);

       cc ... -lpcp

DESCRIPTION         top

       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.

       Most applications using a Performance Metrics Application Programming
       Interface (PMAPI) context (of any type, so PM_CONTEXT_HOST or
       PM_CONTEXT_ARCHIVE or PM_CONTEXT_LOCAL) should not need to call

       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).  However, note that pmLoadNameSpace assumes filename does
       not contain any C-style comments, pre-processor directives or macros;
       if this is not the case, pmLoadASCIINameSpace(3) should be used

       As of Version 3.10.3 of PCP, by default, multiple names in the PMNS
       are allowed to be associated with a single Performance Metrics
       Identifier (PMID) and this is unconditionally allowed by
       pmLoadNameSpace.  pmLoadASCIINameSpace(3) provides an alternative
       interface with user-defined control over the handling of duplicate
       names for the same PMID in the PMNS.

       pmLoadNameSpace returns zero on success.

FILES         top

       $PCP_VAR_DIR/pmns/root   the default local PMNS, when the environment
                                variable PMNS_DEFAULT is unset


       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(5).  Values for these
       variables may be obtained programmatically using the pmGetConfig(3)

SEE ALSO         top

       PMAPI(3), pmGetConfig(3), pmLoadASCIINameSpace(3),
       pmTrimNameSpace(3), pcp.conf(5), pcp.env(5) and PMNS(5).

DIAGNOSTICS         top

       Syntax and other errors in the parsing of the PMNS are reported on
       stderr with a message of the form ``Error Parsing ASCII PMNS: ...''.


              It is an error to try and load more than one PMNS, or to call
              either pmLoadNameSpace and/or pmLoadASCIINameSpace(3) more
              than once.


              Syntax error in the PMNS file.

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2020-08-13.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-08-11.)  If you discover any
       rendering problems in this HTML version of the page, or you believe
       there is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

Performance Co-Pilot                 PCP                  PMLOADNAMESPACE(3)

Pages that refer to this page: pcpintro(1)PCPIntro(1)pmcpp(1)pmnscomp(1)pcpintro(3)PCPIntro(3)pmapi(3)PMAPI(3)pmgetchildren(3)pmGetChildren(3)pmgetchildrenstatus(3)pmGetChildrenStatus(3)pmgetpmnslocation(3)pmGetPMNSLocation(3)pmloadasciinamespace(3)pmLoadASCIINameSpace(3)pmlookupname(3)pmLookupName(3)pmnameall(3)pmNameAll(3)pmnameid(3)pmNameID(3)pmtrimnamespace(3)pmTrimNameSpace(3)pmunloadnamespace(3)pmUnloadNameSpace(3)pmns(5)PMNS(5)