Rechercher une page de manuel
PAPI_get_hardware_info
Langue: en
Version: September, 2004 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
PAPI_get_hardware_info - get information about the system hardwareSYNOPSIS
C Interface#include <papi.h> const PAPI_hw_info_t *PAPI_get_hardware_info(void);Fortran Interface
#include fpapi.h PAPIF_get_hardware_info(C_INT ncpu, C_INT nnodes, C_INT totalcpus, C_INT vendor, C_STRING vendor_string, C_INT model, C_STRING model_string,C_FLOAT revision, C_FLOAT mhz)
DESCRIPTION
In C, this function returns a pointer to a structure containing information about the hardware on which the program runs. In Fortran, the values of the structure are returned explicitly.NOTE
The C structure contains detailed information about cache and TLB sizes. This information is not available from Fortran.ARGUMENTS
The following arguments are implicit in the structure returned by the C function, or explicitly returned by Fortran.ncpu -- number of CPUs in an SMP Node
nnodes -- number of Nodes in the entire system
totalcpus -- total number of CPUs in the entire system
vendor -- vendor id number of CPU
vendor_string -- vendor id string of CPU
model -- model number of CPU
model_string -- model string of CPU
revision -- Revision number of CPU
mhz -- Cycle time of this CPU; *may* be an estimate generated at init time with a quick timing routine
mem_hierarchy -- PAPI memory heirarchy description
RETURN VALUES
On success, the C function returns a non-NULL pointer, and the Fortran function returns PAPI_OK.On error, NULL is returned by the C function, and a non-zero error code is returned by the Fortran function.
ERRORS
- PAPI_EINVAL
- One or more of the arguments is invalid.
EXAMPLE
const PAPI_hw_info_t *hwinfo = NULL; if (PAPI_library_init(PAPI_VER_CURRENT) != PAPI_VER_CURRENT) exit(1); if ((hwinfo = PAPI_get_hardware_info()) == NULL) exit(1); printf("%d CPU's at %f Mhz.\n",hwinfo->totalcpus,hwinfo->mhz);
DATA STRUCTURE
The C data structure returned by this function is found in papi.h and reproduced below:typedef struct _papi_mh_tlb_info { int type; /* See papi.h for PAPI_MH definitions. */ int num_entries; int associativity; } PAPI_mh_tlb_info_t; typedef struct _papi_mh_cache_info { int type; /* See papi.h for PAPI_MH definitions. */ int size; int line_size; int num_lines; int associativity; } PAPI_mh_cache_info_t; typedef struct _papi_mh_level_info { PAPI_mh_tlb_info_t tlb[2]; PAPI_mh_cache_info_t cache[2]; } PAPI_mh_level_t; typedef struct _papi_mh_info { /* mh for mem hierarchy maybe? */ int levels; PAPI_mh_level_t level[PAPI_MAX_MEM_HIERARCHY_LEVELS]; } PAPI_mh_info_t; typedef struct _papi_hw_info { int ncpu; /* Number of CPU's in an SMP Node */ int nnodes; /* Number of Nodes in the entire system */ int totalcpus; /* Total number of CPU's in the entire system */ int vendor; /* Vendor number of CPU */ char vendor_string[PAPI_MAX_STR_LEN]; /* Vendor string of CPU */ int model; /* Model number of CPU */ char model_string[PAPI_MAX_STR_LEN]; /* Model string of CPU */ float revision; /* Revision of CPU */ float mhz; /* Cycle time of this CPU, *may* be estimated at init time with a quick timing routine */ PAPI_mh_info_t mem_hierarchy; /* PAPI memory heirarchy description */ } PAPI_hw_info_t;
BUGS
If called before PAPI_library_init() the behavior of the routine is undefined.SEE ALSO
PAPI_library_init(3), PAPI_get_dmem_info(3), PAPI_get_opt(3), PAPI_get_executable_info(3)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre