linux-libnuma.h

/*
 * Copyright © 2009 CNRS
 * Copyright © 2009-2012 inria.  All rights reserved.
 * Copyright © 2009-2010, 2012 Université Bordeaux 1
 * See COPYING in top-level directory.
 */

#ifndef HWLOC_LINUX_LIBNUMA_H
#define HWLOC_LINUX_LIBNUMA_H

#include <hwloc.h>
#include <numa.h>


#ifdef __cplusplus
extern "C" {
#endif


static __hwloc_inline int
hwloc_cpuset_to_linux_libnuma_ulongs(hwloc_topology_t topology, hwloc_const_cpuset_t cpuset,
                                    unsigned long *mask, unsigned long *maxnode)
{
  int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);
  unsigned long outmaxnode = -1;

  /* round-up to the next ulong and clear all bytes */
  *maxnode = (*maxnode + 8*sizeof(*mask) - 1) & ~(8*sizeof(*mask) - 1);
  memset(mask, 0, *maxnode/8);

  if (depth != HWLOC_TYPE_DEPTH_UNKNOWN) {
    hwloc_obj_t node = NULL;
    while ((node = hwloc_get_next_obj_covering_cpuset_by_depth(topology, cpuset, depth, node)) != NULL) {
      if (node->os_index >= *maxnode)
        continue;
      mask[node->os_index/sizeof(*mask)/8] |= 1UL << (node->os_index % (sizeof(*mask)*8));
      if (outmaxnode == (unsigned long) -1 || outmaxnode < node->os_index)
        outmaxnode = node->os_index;
    }

  } else {
    /* if no numa, libnuma assumes we have a single node */
    if (!hwloc_bitmap_iszero(cpuset)) {
      mask[0] = 1;
      outmaxnode = 0;
    }
  }

  *maxnode = outmaxnode+1;
  return 0;
}

static __hwloc_inline int
hwloc_nodeset_to_linux_libnuma_ulongs(hwloc_topology_t topology, hwloc_const_nodeset_t nodeset,
                                      unsigned long *mask, unsigned long *maxnode)
{
  int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);
  unsigned long outmaxnode = -1;

  /* round-up to the next ulong and clear all bytes */
  *maxnode = (*maxnode + 8*sizeof(*mask) - 1) & ~(8*sizeof(*mask) - 1);
  memset(mask, 0, *maxnode/8);

  if (depth != HWLOC_TYPE_DEPTH_UNKNOWN) {
    hwloc_obj_t node = NULL;
    while ((node = hwloc_get_next_obj_by_depth(topology, depth, node)) != NULL) {
      if (node->os_index >= *maxnode)
        continue;
      if (!hwloc_bitmap_isset(nodeset, node->os_index))
        continue;
      mask[node->os_index/sizeof(*mask)/8] |= 1UL << (node->os_index % (sizeof(*mask)*8));
      if (outmaxnode == (unsigned long) -1 || outmaxnode < node->os_index)
        outmaxnode = node->os_index;
    }

  } else {
    /* if no numa, libnuma assumes we have a single node */
    if (!hwloc_bitmap_iszero(nodeset)) {
      mask[0] = 1;
      outmaxnode = 0;
    }
  }

  *maxnode = outmaxnode+1;
  return 0;
}

static __hwloc_inline int
hwloc_cpuset_from_linux_libnuma_ulongs(hwloc_topology_t topology, hwloc_cpuset_t cpuset,
                                      const unsigned long *mask, unsigned long maxnode)
{
  int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);

  if (depth != HWLOC_TYPE_DEPTH_UNKNOWN) {
    hwloc_obj_t node = NULL;
    hwloc_bitmap_zero(cpuset);
    while ((node = hwloc_get_next_obj_by_depth(topology, depth, node)) != NULL)
      if (node->os_index < maxnode
          && (mask[node->os_index/sizeof(*mask)/8] & (1UL << (node->os_index % (sizeof(*mask)*8)))))
        hwloc_bitmap_or(cpuset, cpuset, node->cpuset);
  } else {
    /* if no numa, libnuma assumes we have a single node */
    if (mask[0] & 1)
      hwloc_bitmap_copy(cpuset, hwloc_topology_get_complete_cpuset(topology));
    else
      hwloc_bitmap_zero(cpuset);
  }

  return 0;
}

static __hwloc_inline int
hwloc_nodeset_from_linux_libnuma_ulongs(hwloc_topology_t topology, hwloc_nodeset_t nodeset,
                                        const unsigned long *mask, unsigned long maxnode)
{
  int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);

  if (depth != HWLOC_TYPE_DEPTH_UNKNOWN) {
    hwloc_obj_t node = NULL;
    hwloc_bitmap_zero(nodeset);
    while ((node = hwloc_get_next_obj_by_depth(topology, depth, node)) != NULL)
      if (node->os_index < maxnode
          && (mask[node->os_index/sizeof(*mask)/8] & (1UL << (node->os_index % (sizeof(*mask)*8)))))
        hwloc_bitmap_set(nodeset, node->os_index);
  } else {
    /* if no numa, libnuma assumes we have a single node */
    if (mask[0] & 1)
      hwloc_bitmap_fill(nodeset);
    else
      hwloc_bitmap_zero(nodeset);
  }

  return 0;
}

static __hwloc_inline struct bitmask *
hwloc_cpuset_to_linux_libnuma_bitmask(hwloc_topology_t topology, hwloc_const_cpuset_t cpuset) __hwloc_attribute_malloc;
static __hwloc_inline struct bitmask *
hwloc_cpuset_to_linux_libnuma_bitmask(hwloc_topology_t topology, hwloc_const_cpuset_t cpuset)
{
  int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);
  struct bitmask *bitmask = numa_allocate_cpumask();
  if (!bitmask)
    return NULL;

  if (depth != HWLOC_TYPE_DEPTH_UNKNOWN) {
    hwloc_obj_t node = NULL;
    while ((node = hwloc_get_next_obj_covering_cpuset_by_depth(topology, cpuset, depth, node)) != NULL)
      if (node->memory.local_memory)
        numa_bitmask_setbit(bitmask, node->os_index);
  } else {
    /* if no numa, libnuma assumes we have a single node */
    if (!hwloc_bitmap_iszero(cpuset))
      numa_bitmask_setbit(bitmask, 0);
  }

  return bitmask;
}

static __hwloc_inline struct bitmask *
hwloc_nodeset_to_linux_libnuma_bitmask(hwloc_topology_t topology, hwloc_const_nodeset_t nodeset) __hwloc_attribute_malloc;
static __hwloc_inline struct bitmask *
hwloc_nodeset_to_linux_libnuma_bitmask(hwloc_topology_t topology, hwloc_const_nodeset_t nodeset)
{
  int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);
  struct bitmask *bitmask = numa_allocate_cpumask();
  if (!bitmask)
    return NULL;

  if (depth != HWLOC_TYPE_DEPTH_UNKNOWN) {
    hwloc_obj_t node = NULL;
    while ((node = hwloc_get_next_obj_by_depth(topology, depth, node)) != NULL)
      if (hwloc_bitmap_isset(nodeset, node->os_index) && node->memory.local_memory)
        numa_bitmask_setbit(bitmask, node->os_index);
  } else {
    /* if no numa, libnuma assumes we have a single node */
    if (!hwloc_bitmap_iszero(nodeset))
      numa_bitmask_setbit(bitmask, 0);
  }

  return bitmask;
}

static __hwloc_inline int
hwloc_cpuset_from_linux_libnuma_bitmask(hwloc_topology_t topology, hwloc_cpuset_t cpuset,
                                        const struct bitmask *bitmask)
{
  int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);

  if (depth != HWLOC_TYPE_DEPTH_UNKNOWN) {
    hwloc_obj_t node = NULL;
    hwloc_bitmap_zero(cpuset);
    while ((node = hwloc_get_next_obj_by_depth(topology, depth, node)) != NULL)
      if (numa_bitmask_isbitset(bitmask, node->os_index))
        hwloc_bitmap_or(cpuset, cpuset, node->cpuset);
  } else {
    /* if no numa, libnuma assumes we have a single node */
    if (numa_bitmask_isbitset(bitmask, 0))
      hwloc_bitmap_copy(cpuset, hwloc_topology_get_complete_cpuset(topology));
    else
      hwloc_bitmap_zero(cpuset);
  }

  return 0;
}

static __hwloc_inline int
hwloc_nodeset_from_linux_libnuma_bitmask(hwloc_topology_t topology, hwloc_nodeset_t nodeset,
                                         const struct bitmask *bitmask)
{
  int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);

  if (depth != HWLOC_TYPE_DEPTH_UNKNOWN) {
    hwloc_obj_t node = NULL;
    hwloc_bitmap_zero(nodeset);
    while ((node = hwloc_get_next_obj_by_depth(topology, depth, node)) != NULL)
      if (numa_bitmask_isbitset(bitmask, node->os_index))
        hwloc_bitmap_set(nodeset, node->os_index);
  } else {
    /* if no numa, libnuma assumes we have a single node */
    if (numa_bitmask_isbitset(bitmask, 0))
      hwloc_bitmap_fill(nodeset);
    else
      hwloc_bitmap_zero(nodeset);
  }

  return 0;
}

#ifdef __cplusplus
} /* extern "C" */
#endif


#endif /* HWLOC_LINUX_NUMA_H */