intel-mic.h
/*
* Copyright © 2013 Inria. All rights reserved.
* See COPYING in top-level directory.
*/
#ifndef HWLOC_INTEL_MIC_H
#define HWLOC_INTEL_MIC_H
#include <hwloc.h>
#include <hwloc/autogen/config.h>
#include <hwloc/helper.h>
#ifdef HWLOC_LINUX_SYS
#include <hwloc/linux.h>
#include <dirent.h>
#include <string.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
#endif
static inline int
hwloc_intel_mic_get_device_cpuset(hwloc_topology_t topology ,
int idx ,
hwloc_cpuset_t set)
{
#ifdef HWLOC_LINUX_SYS
/* If we're on Linux, use the sysfs mechanism to get the local cpus */
#define HWLOC_INTEL_MIC_DEVICE_SYSFS_PATH_MAX 128
char path[HWLOC_INTEL_MIC_DEVICE_SYSFS_PATH_MAX];
DIR *sysdir = NULL;
FILE *sysfile = NULL;
struct dirent *dirent;
unsigned pcibus, pcidev, pcifunc;
if (!hwloc_topology_is_thissystem(topology)) {
errno = EINVAL;
return -1;
}
sprintf(path, "/sys/class/mic/mic%d", idx);
sysdir = opendir(path);
if (!sysdir)
return -1;
while ((dirent = readdir(sysdir)) != NULL) {
if (sscanf(dirent->d_name, "pci_%02x:%02x.%02x", &pcibus, &pcidev, &pcifunc) == 3) {
sprintf(path, "/sys/class/mic/mic%d/pci_%02x:%02x.%02x/local_cpus", idx, pcibus, pcidev, pcifunc);
sysfile = fopen(path, "r");
if (!sysfile) {
closedir(sysdir);
return -1;
}
hwloc_linux_parse_cpumap_file(sysfile, set);
if (hwloc_bitmap_iszero(set))
hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
fclose(sysfile);
break;
}
}
closedir(sysdir);
#else
/* Non-Linux systems simply get a full cpuset */
hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
#endif
return 0;
}
static inline hwloc_obj_t
hwloc_intel_mic_get_device_osdev_by_index(hwloc_topology_t topology,
unsigned idx)
{
hwloc_obj_t osdev = NULL;
while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
if (HWLOC_OBJ_OSDEV_COPROC == osdev->attr->osdev.type
&& osdev->name
&& !strncmp("mic", osdev->name, 3)
&& atoi(osdev->name + 3) == (int) idx)
return osdev;
}
return NULL;
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* HWLOC_INTEL_MIC_H */