info.c File Reference

#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include "info.h"

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Functions
int	_base_spe_count_physical_cpus (int cpu_node)
int	_base_spe_count_usable_spes (int cpu_node)
int	_base_spe_count_physical_spes (int cpu_node)
int	_base_spe_cpu_info_get (int info_requested, int cpu_node)

Function Documentation

int _base_spe_count_physical_cpus

(

int

cpu_node)

Definition at line 30 of file info.c.

References DEBUG_PRINTF, and THREADS_PER_BE.

Referenced by _base_spe_count_physical_spes(), and _base_spe_cpu_info_get().

{
        const char    *buff = "/sys/devices/system/cpu";
        DIR     *dirp;
        int ret = -2;
        struct  dirent  *dptr;

        DEBUG_PRINTF ("spe_count_physical_cpus()\n");
        
        // make sure, cpu_node is in the correct range
        if (cpu_node != -1) {
                errno = EINVAL;
                return -1;
        }

        // Count number of CPUs in /sys/devices/system/cpu
        if((dirp=opendir(buff))==NULL) {
                fprintf(stderr,"Error opening %s ",buff);
                perror("dirlist");
                errno = EINVAL;
                return -1;
        }
    while((dptr=readdir(dirp))) {
                ret++;
        }
        closedir(dirp);
        return ret/THREADS_PER_BE; 
}

int _base_spe_count_physical_spes

(

int

cpu_node)

Definition at line 71 of file info.c.

References _base_spe_count_physical_cpus(), and DEBUG_PRINTF.

Referenced by _base_spe_count_usable_spes(), and _base_spe_cpu_info_get().

{
        const char      *buff = "/sys/devices/system/spu";
        DIR     *dirp;
        int ret = -2;
        struct  dirent  *dptr;
        int no_of_bes;

        DEBUG_PRINTF ("spe_count_physical_spes()\n");

        // make sure, cpu_node is in the correct range
        no_of_bes = _base_spe_count_physical_cpus(-1);
        if (cpu_node < -1 || cpu_node >= no_of_bes ) {
                errno = EINVAL;
                return -1;
        }

        // Count number of SPUs in /sys/devices/system/spu
        if((dirp=opendir(buff))==NULL) {
                fprintf(stderr,"Error opening %s ",buff);
                perror("dirlist");
                errno = EINVAL;
                return -1;
        }
    while((dptr=readdir(dirp))) {
                ret++;
        }
        closedir(dirp);

        if(cpu_node != -1) ret /= no_of_bes; // FIXME
        return ret;
}

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int _base_spe_count_usable_spes

(

int

cpu_node)

Definition at line 62 of file info.c.

References _base_spe_count_physical_spes().

Referenced by _base_spe_cpu_info_get().

{
        return _base_spe_count_physical_spes(cpu_node); // FIXME
}

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int _base_spe_cpu_info_get	(	int	info_requested,
		int	cpu_node
	)

_base_spe_info_get

Definition at line 105 of file info.c.

References _base_spe_count_physical_cpus(), _base_spe_count_physical_spes(), _base_spe_count_usable_spes(), SPE_COUNT_PHYSICAL_CPU_NODES, SPE_COUNT_PHYSICAL_SPES, and SPE_COUNT_USABLE_SPES.

                                                             {
        int ret = 0;
        errno = 0;
        
        switch (info_requested) {
        case  SPE_COUNT_PHYSICAL_CPU_NODES:
                ret = _base_spe_count_physical_cpus(cpu_node);
                break;
        case SPE_COUNT_PHYSICAL_SPES:
                ret = _base_spe_count_physical_spes(cpu_node);
                break;
        case SPE_COUNT_USABLE_SPES:
                ret = _base_spe_count_usable_spes(cpu_node);
                break;
        default:
                errno = EINVAL;
                ret = -1;
        }
        return ret;
}

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