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PAPI_set_cmp_domain(3) PAPI PAPI_set_cmp_domain(3)

NAME

PAPI_set_cmp_domain - Set the default counting domain for new event sets bound to the specified component.

SYNOPSIS

Detailed Description

C Prototype:

#include <papi.h>
int PAPI_set_cmp_domain( int domain, int cidx );

Parameters:

domain one of the following constants as defined in the papi.h header file

  • PAPI_DOM_USER User context counted
  • PAPI_DOM_KERNEL Kernel/OS context counted
  • PAPI_DOM_OTHER Exception/transient mode counted
  • PAPI_DOM_SUPERVISOR Supervisor/hypervisor context counted
  • PAPI_DOM_ALL All above contexts counted
  • PAPI_DOM_MIN The smallest available context
  • PAPI_DOM_MAX The largest available context
  • PAPI_DOM_HWSPEC Something other than CPU like stuff. Individual components can decode low order bits for more meaning

cidx An integer identifier for a component. By convention, component 0 is always the cpu component.

Return values:

PAPI_OK
PAPI_EINVAL One or more of the arguments is invalid.
PAPI_ENOCMP The argument cidx is not a valid component.

PAPI_set_cmp_domain sets the default counting domain for all new event sets in all threads, and requires an explicit component argument. Event sets that are already in existence are not affected. To change the domain of an existing event set, please see PAPI_set_opt. The reader should note that the domain of an event set affects only the mode in which the counter continues to run. Counts are still aggregated for the current process, and not for any other processes in the system. Thus when requesting PAPI_DOM_KERNEL , the user is asking for events that occur on behalf of the process, inside the kernel.

Example:

int ret;
// Initialize the library
ret = PAPI_library_init(PAPI_VER_CURRENT);
if (ret > 0 && ret != PAPI_VER_CURRENT) {


  fprintf(stderr,"PAPI library version mismatch!0);


  exit(1); 
}
if (ret < 0) handle_error(ret);
// Set the default domain for the cpu component
ret = PAPI_set_cmp_domain(PAPI_DOM_KERNEL,0);
if (ret != PAPI_OK) handle_error(ret);
ret = PAPI_create_eventset(&EventSet);
if (ret != PAPI_OK) handle_error(ret);

See also:

PAPI_set_domain PAPI_set_granularity PAPI_set_opt PAPI_get_opt

Author

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Thu May 9 2024 Version 5.6.0.0