PMUSECONTEXT(3) Library Functions Manual PMUSECONTEXT(3)NAME
pmUseContext - change current PMAPI context
C SYNOPSIS
#include <pcp/pmapi.h>
int pmUseContext(int handle);
cc ... -lpcp
DESCRIPTION
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 log of performance metrics as created by pmlog-
ger(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 pmDupContext(3).
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.
SEE ALSO PMAPI(3), pmDestroyContext(3), pmDupContext(3), pmNewContext(3) and pmWhichContext(3).
DIAGNOSTICS
PM_ERR_NOCONTEXT
handle does not identify a valid PMAPI context
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Check Out this Related Man Page
PMDUPCONTEXT(3) Library Functions Manual PMDUPCONTEXT(3)NAME
pmDupContext - duplicate a PMAPI context
C SYNOPSIS
#include <pcp/pmapi.h>
int pmDupContext(void);
cc ... -lpcp
DESCRIPTION
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 log of performance metrics as created by pmlog-
ger(1).
Calling pmDupContext will replicate the current PMAPI context, returning a handle for the new context that may be used with subsequent
calls to pmUseContext(3).
Once created, the duplicated context and the original context have independent existence, and so their instance profiles and collection
time (relevant only for archive contexts) may be independently varied.
The newly replicated context becomes the current context.
SEE ALSO PMAPI(3), pmNewContext(3) and pmUseContext(3).
Performance Co-Pilot PCP PMDUPCONTEXT(3)
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