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.TH "PAPI_set_multiplex" 3 "Wed Jun 25 2025 19:30:49" "Version 7.2.0.0" "PAPI" \" -*- nroff -*-
.ad l
.nh
.SH NAME
PAPI_set_multiplex \- Convert a standard event set to a multiplexed event set\&.
.SH SYNOPSIS
.br
.PP
.SH "Detailed Description"
.PP
.PP
\fBC Interface:\fP
.RS 4
#include <\fBpapi\&.h\fP>
.br
int PAPI_set_multiplex( int EventSet );
.RE
.PP
\fBParameters\fP
.RS 4
\fIEventSet\fP an integer handle for a PAPI event set as created by \fBPAPI_create_eventset\fP
.RE
.PP
\fBReturn values\fP
.RS 4
\fIPAPI_OK\fP
.br
\fIPAPI_EINVAL\fP -- One or more of the arguments is invalid, or the EventSet is already multiplexed\&.
.br
\fIPAPI_ENOCMP\fP -- The EventSet specified is not yet bound to a component\&.
.br
\fIPAPI_ENOEVST\fP -- The EventSet specified does not exist\&.
.br
\fIPAPI_EISRUN\fP -- The EventSet is currently counting events\&.
.br
\fIPAPI_ENOMEM\fP -- Insufficient memory to complete the operation\&.
.RE
.PP
\fBPAPI_set_multiplex\fP converts a standard PAPI event set created by a call to \fBPAPI_create_eventset\fP into an event set capable of handling multiplexed events\&. This must be done after calling \fBPAPI_multiplex_init\fP, and either \fBPAPI_add_event\fP or \fBPAPI_assign_eventset_component\fP, but prior to calling PAPI_start()\&.
.PP
Events can be added to an event set either before or after converting it into a multiplexed set, but the conversion must be done prior to using it as a multiplexed set\&.
.PP
\fBNote\fP
.RS 4
Multiplexing can't be enabled until PAPI knows which component is targeted\&. Due to the late binding nature of PAPI event sets, this only happens after adding an event to an event set or explicitly binding the component with a call to \fBPAPI_assign_eventset_component\fP\&.
.RE
.PP
\fBExample:\fP
.RS 4
.PP
.nf
int EventSet = PAPI_NULL;
int ret;
// Create an empty EventSet
ret = PAPI_create_eventset(&EventSet);
if (ret != PAPI_OK) handle_error(ret);
// Bind it to the CPU component
ret = PAPI_assign_eventset_component(EventSet, 0);
if (ret != PAPI_OK) handle_error(ret);
// Check current multiplex status
ret = PAPI_get_multiplex(EventSet);
if (ret == TRUE) printf("This event set is ready for multiplexing\\n\&.")
if (ret == FALSE) printf("This event set is not enabled for multiplexing\\n\&.")
if (ret < 0) handle_error(ret);
// Turn on multiplexing
ret = PAPI_set_multiplex(EventSet);
if ((ret == PAPI_EINVAL) && (PAPI_get_multiplex(EventSet) == TRUE))
printf("This event set already has multiplexing enabled\\n");
else if (ret != PAPI_OK) handle_error(ret);
.fi
.PP
.RE
.PP
\fBSee also\fP
.RS 4
\fBPAPI_multiplex_init\fP
.PP
\fBPAPI_get_multiplex\fP
.PP
\fBPAPI_set_opt\fP
.PP
\fBPAPI_create_eventset\fP
.RE
.PP
.SH "Author"
.PP
Generated automatically by Doxygen for PAPI from the source code\&.
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