pmusecontext(3) — Linux manual page


PMUSECONTEXT(3)         Library Functions Manual         PMUSECONTEXT(3)

NAME         top

       pmUseContext - change current PMAPI context

C SYNOPSIS         top

       #include <pcp/pmapi.h>

       int pmUseContext(int handle);

       cc ... -lpcp

DESCRIPTION         top

       An application using the Performance Metrics Application
       Programming Interface (PMAPI) may manipulate several concurrent
       contexts, each associated with a source of performance metrics,
       e.g. pmcd(1) on some host, or an archive of performance metrics
       as created by pmlogger(1).

       Calling pmUseContext causes the current PMAPI context to be set
       to the context identified by handle.  The value of handle must be
       one returned from an earlier call to pmNewContext(3) or

       Below the PMAPI, all contexts used by an application are saved in
       their most recently modified state, so pmUseContext restores the
       context to the state it was in the last time the context was
       used, not the state of the context when it was established.

DIAGNOSTICS         top


              handle does not identify a valid PMAPI context

SEE ALSO         top

       PMAPI(3), pmDestroyContext(3), pmDupContext(3), pmNewContext(3)
       and pmWhichContext(3).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at 
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       page, send it to  This page was obtained from the
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       ⟨⟩ on 2024-06-14.
       (At that time, the date of the most recent commit that was found
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       (which is not part of the original manual page), send a mail to

Performance Co-Pilot               PCP                   PMUSECONTEXT(3)

Pages that refer to this page: pmaddprofile(3)pmapi(3)pmdelprofile(3)pmdestroycontext(3)pmdupcontext(3)pmfetch(3)pmfetchgroup(3)pmistart(3)pmnewcontext(3)pmreconnectcontext(3)pmwhichcontext(3)QmcGroup(3)