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topology.c
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topology.c
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/*
* Copyright © 2009 CNRS
* Copyright © 2009-2022 Inria. All rights reserved.
* Copyright © 2009-2012, 2020 Université Bordeaux
* Copyright © 2009-2011 Cisco Systems, Inc. All rights reserved.
* Copyright © 2022 IBM Corporation. All rights reserved.
* See COPYING in top-level directory.
*/
#include "private/autogen/config.h"
#define _ATFILE_SOURCE
#include <assert.h>
#include <sys/types.h>
#ifdef HAVE_DIRENT_H
#include <dirent.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <limits.h>
#include <float.h>
#include "hwloc.h"
#include "private/private.h"
#include "private/debug.h"
#include "private/misc.h"
#ifdef HAVE_MACH_MACH_INIT_H
#include <mach/mach_init.h>
#endif
#ifdef HAVE_MACH_INIT_H
#include <mach_init.h>
#endif
#ifdef HAVE_MACH_MACH_HOST_H
#include <mach/mach_host.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#endif
#ifdef HWLOC_WIN_SYS
#include <windows.h>
#endif
/*
* Define ZES_ENABLE_SYSMAN=1 early so that the LevelZero backend gets Sysman enabled.
* Use the constructor if supported and/or the Windows DllMain callback.
* Do it in the main hwloc library instead of the levelzero component because
* the latter could be loaded later as a plugin.
*
* L0 seems to be using getenv() to check this variable on Windows
* (at least in the Intel Compute-Runtime of March 2021),
* but setenv() doesn't seem to exist on Windows, hence use putenv() to set the variable.
*
* For the record, Get/SetEnvironmentVariable() is not exactly the same as getenv/putenv():
* - getenv() doesn't see what was set with SetEnvironmentVariable()
* - GetEnvironmentVariable() doesn't see putenv() in cygwin (while it does in MSVC and MinGW).
* Hence, if L0 ever switches from getenv() to GetEnvironmentVariable(),
* it will break in cygwin, we'll have to use both putenv() and SetEnvironmentVariable().
* Hopefully L0 will provide a way to enable Sysman without env vars before it happens.
*/
#if HWLOC_HAVE_ATTRIBUTE_CONSTRUCTOR
static void hwloc_constructor(void) __attribute__((constructor));
static void hwloc_constructor(void)
{
if (!getenv("ZES_ENABLE_SYSMAN"))
#ifdef HWLOC_WIN_SYS
putenv("ZES_ENABLE_SYSMAN=1");
#else
setenv("ZES_ENABLE_SYSMAN", "1", 1);
#endif
}
#endif
#ifdef HWLOC_WIN_SYS
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
{
if (fdwReason == DLL_PROCESS_ATTACH) {
if (!getenv("ZES_ENABLE_SYSMAN"))
/* Windows does not have a setenv, so use putenv. */
putenv((char *) "ZES_ENABLE_SYSMAN=1");
}
return TRUE;
}
#endif
unsigned hwloc_get_api_version(void)
{
return HWLOC_API_VERSION;
}
int hwloc_topology_abi_check(hwloc_topology_t topology)
{
return topology->topology_abi != HWLOC_TOPOLOGY_ABI ? -1 : 0;
}
int hwloc_hide_errors(void)
{
static int hide = 1; /* only show critical errors by default. lstopo will show others */
static int checked = 0;
if (!checked) {
const char *envvar = getenv("HWLOC_HIDE_ERRORS");
if (envvar)
hide = atoi(envvar);
checked = 1;
}
return hide;
}
/* format the obj info to print in error messages */
static void
report_insert_error_format_obj(char *buf, size_t buflen, hwloc_obj_t obj)
{
char typestr[64];
char *cpusetstr;
char *nodesetstr = NULL;
hwloc_obj_type_snprintf(typestr, sizeof(typestr), obj, 0);
hwloc_bitmap_asprintf(&cpusetstr, obj->cpuset);
if (obj->nodeset) /* may be missing during insert */
hwloc_bitmap_asprintf(&nodesetstr, obj->nodeset);
if (obj->os_index != HWLOC_UNKNOWN_INDEX)
snprintf(buf, buflen, "%s (P#%u cpuset %s%s%s)",
typestr, obj->os_index, cpusetstr,
nodesetstr ? " nodeset " : "",
nodesetstr ? nodesetstr : "");
else
snprintf(buf, buflen, "%s (cpuset %s%s%s)",
typestr, cpusetstr,
nodesetstr ? " nodeset " : "",
nodesetstr ? nodesetstr : "");
free(cpusetstr);
free(nodesetstr);
}
static void report_insert_error(hwloc_obj_t new, hwloc_obj_t old, const char *msg, const char *reason)
{
static int reported = 0;
if (reason && !reported && hwloc_hide_errors() < 2) {
char newstr[512];
char oldstr[512];
report_insert_error_format_obj(newstr, sizeof(newstr), new);
report_insert_error_format_obj(oldstr, sizeof(oldstr), old);
fprintf(stderr, "****************************************************************************\n");
fprintf(stderr, "* hwloc %s received invalid information from the operating system.\n", HWLOC_VERSION);
fprintf(stderr, "*\n");
fprintf(stderr, "* Failed with: %s\n", msg);
fprintf(stderr, "* while inserting %s at %s\n", newstr, oldstr);
fprintf(stderr, "* coming from: %s\n", reason);
fprintf(stderr, "*\n");
fprintf(stderr, "* The following FAQ entry in the hwloc documentation may help:\n");
fprintf(stderr, "* What should I do when hwloc reports \"operating system\" warnings?\n");
fprintf(stderr, "* Otherwise please report this error message to the hwloc user's mailing list,\n");
#ifdef HWLOC_LINUX_SYS
fprintf(stderr, "* along with the files generated by the hwloc-gather-topology script.\n");
#else
fprintf(stderr, "* along with any relevant topology information from your platform.\n");
#endif
fprintf(stderr, "* \n");
fprintf(stderr, "* hwloc will now ignore this invalid topology information and continue.\n");
fprintf(stderr, "****************************************************************************\n");
reported = 1;
}
}
#if defined(HAVE_SYSCTLBYNAME)
int hwloc_get_sysctlbyname(const char *name, int64_t *ret)
{
union {
int32_t i32;
int64_t i64;
} n;
size_t size = sizeof(n);
if (sysctlbyname(name, &n, &size, NULL, 0))
return -1;
switch (size) {
case sizeof(n.i32):
*ret = n.i32;
break;
case sizeof(n.i64):
*ret = n.i64;
break;
default:
return -1;
}
return 0;
}
#endif
#if defined(HAVE_SYSCTL)
int hwloc_get_sysctl(int name[], unsigned namelen, int64_t *ret)
{
union {
int32_t i32;
int64_t i64;
} n;
size_t size = sizeof(n);
if (sysctl(name, namelen, &n, &size, NULL, 0))
return -1;
switch (size) {
case sizeof(n.i32):
*ret = n.i32;
break;
case sizeof(n.i64):
*ret = n.i64;
break;
default:
return -1;
}
return 0;
}
#endif
/* Return the OS-provided number of processors.
* Assumes topology->is_thissystem is true.
*/
#ifndef HWLOC_WIN_SYS /* The windows implementation is in topology-windows.c */
int
hwloc_fallback_nbprocessors(unsigned flags) {
int n;
if (flags & HWLOC_FALLBACK_NBPROCESSORS_INCLUDE_OFFLINE) {
/* try to get all CPUs for Linux and Solaris that can handle offline CPUs */
#if HAVE_DECL__SC_NPROCESSORS_CONF
n = sysconf(_SC_NPROCESSORS_CONF);
#elif HAVE_DECL__SC_NPROC_CONF
n = sysconf(_SC_NPROC_CONF);
#else
n = -1;
#endif
if (n != -1)
return n;
}
/* try getting only online CPUs, or whatever we can get */
#if HAVE_DECL__SC_NPROCESSORS_ONLN
n = sysconf(_SC_NPROCESSORS_ONLN);
#elif HAVE_DECL__SC_NPROC_ONLN
n = sysconf(_SC_NPROC_ONLN);
#elif HAVE_DECL__SC_NPROCESSORS_CONF
n = sysconf(_SC_NPROCESSORS_CONF);
#elif HAVE_DECL__SC_NPROC_CONF
n = sysconf(_SC_NPROC_CONF);
#elif defined(HAVE_HOST_INFO) && HAVE_HOST_INFO
struct host_basic_info info;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
host_info(mach_host_self(), HOST_BASIC_INFO, (integer_t*) &info, &count);
n = info.avail_cpus;
#elif defined(HAVE_SYSCTLBYNAME)
int64_t nn;
if (hwloc_get_sysctlbyname("hw.ncpu", &nn))
nn = -1;
n = nn;
#elif defined(HAVE_SYSCTL) && HAVE_DECL_CTL_HW && HAVE_DECL_HW_NCPU
static int name[2] = {CTL_HW, HW_NCPU};
int64_t nn;
if (hwloc_get_sysctl(name, sizeof(name)/sizeof(*name), &nn))
n = -1;
n = nn;
#else
#ifdef __GNUC__
#warning No known way to discover number of available processors on this system
#endif
n = -1;
#endif
return n;
}
int64_t
hwloc_fallback_memsize(void) {
int64_t size;
#if defined(HAVE_HOST_INFO) && HAVE_HOST_INFO
struct host_basic_info info;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
host_info(mach_host_self(), HOST_BASIC_INFO, (integer_t*) &info, &count);
size = info.memory_size;
#elif defined(HAVE_SYSCTL) && HAVE_DECL_CTL_HW && (HAVE_DECL_HW_REALMEM64 || HAVE_DECL_HW_MEMSIZE64 || HAVE_DECL_HW_PHYSMEM64 || HAVE_DECL_HW_USERMEM64 || HAVE_DECL_HW_REALMEM || HAVE_DECL_HW_MEMSIZE || HAVE_DECL_HW_PHYSMEM || HAVE_DECL_HW_USERMEM)
#if HAVE_DECL_HW_MEMSIZE64
static int name[2] = {CTL_HW, HW_MEMSIZE64};
#elif HAVE_DECL_HW_REALMEM64
static int name[2] = {CTL_HW, HW_REALMEM64};
#elif HAVE_DECL_HW_PHYSMEM64
static int name[2] = {CTL_HW, HW_PHYSMEM64};
#elif HAVE_DECL_HW_USERMEM64
static int name[2] = {CTL_HW, HW_USERMEM64};
#elif HAVE_DECL_HW_MEMSIZE
static int name[2] = {CTL_HW, HW_MEMSIZE};
#elif HAVE_DECL_HW_REALMEM
static int name[2] = {CTL_HW, HW_REALMEM};
#elif HAVE_DECL_HW_PHYSMEM
static int name[2] = {CTL_HW, HW_PHYSMEM};
#elif HAVE_DECL_HW_USERMEM
static int name[2] = {CTL_HW, HW_USERMEM};
#endif
if (hwloc_get_sysctl(name, sizeof(name)/sizeof(*name), &size))
size = -1;
#elif defined(HAVE_SYSCTLBYNAME)
if (hwloc_get_sysctlbyname("hw.memsize", &size) &&
hwloc_get_sysctlbyname("hw.realmem", &size) &&
hwloc_get_sysctlbyname("hw.physmem", &size) &&
hwloc_get_sysctlbyname("hw.usermem", &size))
size = -1;
#else
size = -1;
#endif
return size;
}
#endif /* !HWLOC_WIN_SYS */
/*
* Use the given number of processors to set a PU level.
*/
void
hwloc_setup_pu_level(struct hwloc_topology *topology,
unsigned nb_pus)
{
struct hwloc_obj *obj;
unsigned oscpu,cpu;
hwloc_debug("%s", "\n\n * CPU cpusets *\n\n");
for (cpu=0,oscpu=0; cpu<nb_pus; oscpu++)
{
obj = hwloc_alloc_setup_object(topology, HWLOC_OBJ_PU, oscpu);
obj->cpuset = hwloc_bitmap_alloc();
hwloc_bitmap_only(obj->cpuset, oscpu);
hwloc_debug_2args_bitmap("cpu %u (os %u) has cpuset %s\n",
cpu, oscpu, obj->cpuset);
hwloc__insert_object_by_cpuset(topology, NULL, obj, "core:pulevel");
cpu++;
}
}
/* Traverse children of a parent in a safe way: reread the next pointer as
* appropriate to prevent crash on child deletion: */
#define for_each_child_safe(child, parent, pchild) \
for (pchild = &(parent)->first_child, child = *pchild; \
child; \
/* Check whether the current child was not dropped. */ \
(*pchild == child ? pchild = &(child->next_sibling) : NULL), \
/* Get pointer to next child. */ \
child = *pchild)
#define for_each_memory_child_safe(child, parent, pchild) \
for (pchild = &(parent)->memory_first_child, child = *pchild; \
child; \
/* Check whether the current child was not dropped. */ \
(*pchild == child ? pchild = &(child->next_sibling) : NULL), \
/* Get pointer to next child. */ \
child = *pchild)
#define for_each_io_child_safe(child, parent, pchild) \
for (pchild = &(parent)->io_first_child, child = *pchild; \
child; \
/* Check whether the current child was not dropped. */ \
(*pchild == child ? pchild = &(child->next_sibling) : NULL), \
/* Get pointer to next child. */ \
child = *pchild)
#define for_each_misc_child_safe(child, parent, pchild) \
for (pchild = &(parent)->misc_first_child, child = *pchild; \
child; \
/* Check whether the current child was not dropped. */ \
(*pchild == child ? pchild = &(child->next_sibling) : NULL), \
/* Get pointer to next child. */ \
child = *pchild)
#ifdef HWLOC_DEBUG
/* Just for debugging. */
static void
hwloc_debug_print_object(int indent __hwloc_attribute_unused, hwloc_obj_t obj)
{
char type[64], idx[12], attr[1024], *cpuset = NULL;
hwloc_debug("%*s", 2*indent, "");
hwloc_obj_type_snprintf(type, sizeof(type), obj, 1);
if (obj->os_index != HWLOC_UNKNOWN_INDEX)
snprintf(idx, sizeof(idx), "#%u", obj->os_index);
else
*idx = '\0';
hwloc_obj_attr_snprintf(attr, sizeof(attr), obj, " ", 1);
hwloc_debug("%s%s%s%s%s", type, idx, *attr ? "(" : "", attr, *attr ? ")" : "");
if (obj->name)
hwloc_debug(" name \"%s\"", obj->name);
if (obj->subtype)
hwloc_debug(" subtype \"%s\"", obj->subtype);
if (obj->cpuset) {
hwloc_bitmap_asprintf(&cpuset, obj->cpuset);
hwloc_debug(" cpuset %s", cpuset);
free(cpuset);
}
if (obj->complete_cpuset) {
hwloc_bitmap_asprintf(&cpuset, obj->complete_cpuset);
hwloc_debug(" complete %s", cpuset);
free(cpuset);
}
if (obj->nodeset) {
hwloc_bitmap_asprintf(&cpuset, obj->nodeset);
hwloc_debug(" nodeset %s", cpuset);
free(cpuset);
}
if (obj->complete_nodeset) {
hwloc_bitmap_asprintf(&cpuset, obj->complete_nodeset);
hwloc_debug(" completeN %s", cpuset);
free(cpuset);
}
if (obj->arity)
hwloc_debug(" arity %u", obj->arity);
hwloc_debug("%s", "\n");
}
static void
hwloc_debug_print_objects(int indent __hwloc_attribute_unused, hwloc_obj_t obj)
{
if (hwloc_debug_enabled() >= 2) {
hwloc_obj_t child;
hwloc_debug_print_object(indent, obj);
for_each_child (child, obj)
hwloc_debug_print_objects(indent + 1, child);
for_each_memory_child (child, obj)
hwloc_debug_print_objects(indent + 1, child);
for_each_io_child (child, obj)
hwloc_debug_print_objects(indent + 1, child);
for_each_misc_child (child, obj)
hwloc_debug_print_objects(indent + 1, child);
}
}
#else /* !HWLOC_DEBUG */
#define hwloc_debug_print_object(indent, obj) do { /* nothing */ } while (0)
#define hwloc_debug_print_objects(indent, obj) do { /* nothing */ } while (0)
#endif /* !HWLOC_DEBUG */
void hwloc__free_infos(struct hwloc_info_s *infos, unsigned count)
{
unsigned i;
for(i=0; i<count; i++) {
free(infos[i].name);
free(infos[i].value);
}
free(infos);
}
int hwloc__add_info(struct hwloc_info_s **infosp, unsigned *countp, const char *name, const char *value)
{
unsigned count = *countp;
struct hwloc_info_s *infos = *infosp;
#define OBJECT_INFO_ALLOC 8
/* nothing allocated initially, (re-)allocate by multiple of 8 */
unsigned alloccount = (count + 1 + (OBJECT_INFO_ALLOC-1)) & ~(OBJECT_INFO_ALLOC-1);
if (count != alloccount) {
struct hwloc_info_s *tmpinfos = realloc(infos, alloccount*sizeof(*infos));
if (!tmpinfos)
/* failed to allocate, ignore this info */
goto out_with_array;
*infosp = infos = tmpinfos;
}
infos[count].name = strdup(name);
if (!infos[count].name)
goto out_with_array;
infos[count].value = strdup(value);
if (!infos[count].value)
goto out_with_name;
*countp = count+1;
return 0;
out_with_name:
free(infos[count].name);
out_with_array:
/* don't bother reducing the array */
return -1;
}
int hwloc__add_info_nodup(struct hwloc_info_s **infosp, unsigned *countp,
const char *name, const char *value,
int replace)
{
struct hwloc_info_s *infos = *infosp;
unsigned count = *countp;
unsigned i;
for(i=0; i<count; i++) {
if (!strcmp(infos[i].name, name)) {
if (replace) {
char *new = strdup(value);
if (!new)
return -1;
free(infos[i].value);
infos[i].value = new;
}
return 0;
}
}
return hwloc__add_info(infosp, countp, name, value);
}
int hwloc__move_infos(struct hwloc_info_s **dst_infosp, unsigned *dst_countp,
struct hwloc_info_s **src_infosp, unsigned *src_countp)
{
unsigned dst_count = *dst_countp;
struct hwloc_info_s *dst_infos = *dst_infosp;
unsigned src_count = *src_countp;
struct hwloc_info_s *src_infos = *src_infosp;
unsigned i;
#define OBJECT_INFO_ALLOC 8
/* nothing allocated initially, (re-)allocate by multiple of 8 */
unsigned alloccount = (dst_count + src_count + (OBJECT_INFO_ALLOC-1)) & ~(OBJECT_INFO_ALLOC-1);
if (dst_count != alloccount) {
struct hwloc_info_s *tmp_infos = realloc(dst_infos, alloccount*sizeof(*dst_infos));
if (!tmp_infos)
/* Failed to realloc, ignore the appended infos */
goto drop;
dst_infos = tmp_infos;
}
for(i=0; i<src_count; i++, dst_count++) {
dst_infos[dst_count].name = src_infos[i].name;
dst_infos[dst_count].value = src_infos[i].value;
}
*dst_infosp = dst_infos;
*dst_countp = dst_count;
free(src_infos);
*src_infosp = NULL;
*src_countp = 0;
return 0;
drop:
/* drop src infos, don't modify dst_infos at all */
for(i=0; i<src_count; i++) {
free(src_infos[i].name);
free(src_infos[i].value);
}
free(src_infos);
*src_infosp = NULL;
*src_countp = 0;
return -1;
}
int hwloc_obj_add_info(hwloc_obj_t obj, const char *name, const char *value)
{
return hwloc__add_info(&obj->infos, &obj->infos_count, name, value);
}
/* This function may be called with topology->tma set, it cannot free() or realloc() */
int hwloc__tma_dup_infos(struct hwloc_tma *tma,
struct hwloc_info_s **newip, unsigned *newcp,
struct hwloc_info_s *oldi, unsigned oldc)
{
struct hwloc_info_s *newi;
unsigned i, j;
newi = hwloc_tma_calloc(tma, oldc * sizeof(*newi));
if (!newi)
return -1;
for(i=0; i<oldc; i++) {
newi[i].name = hwloc_tma_strdup(tma, oldi[i].name);
newi[i].value = hwloc_tma_strdup(tma, oldi[i].value);
if (!newi[i].name || !newi[i].value)
goto failed;
}
*newip = newi;
*newcp = oldc;
return 0;
failed:
assert(!tma || !tma->dontfree); /* this tma cannot fail to allocate */
for(j=0; j<=i; j++) {
free(newi[i].name);
free(newi[i].value);
}
free(newi);
*newip = NULL;
return -1;
}
static void
hwloc__free_object_contents(hwloc_obj_t obj)
{
switch (obj->type) {
case HWLOC_OBJ_NUMANODE:
free(obj->attr->numanode.page_types);
break;
default:
break;
}
hwloc__free_infos(obj->infos, obj->infos_count);
free(obj->attr);
free(obj->children);
free(obj->subtype);
free(obj->name);
hwloc_bitmap_free(obj->cpuset);
hwloc_bitmap_free(obj->complete_cpuset);
hwloc_bitmap_free(obj->nodeset);
hwloc_bitmap_free(obj->complete_nodeset);
}
/* Free an object and all its content. */
void
hwloc_free_unlinked_object(hwloc_obj_t obj)
{
hwloc__free_object_contents(obj);
free(obj);
}
/* Replace old with contents of new object, and make new freeable by the caller.
* Requires reconnect (for siblings pointers and group depth),
* fixup of sets (only the main cpuset was likely compared before merging),
* and update of total_memory and group depth.
*/
static void
hwloc_replace_linked_object(hwloc_obj_t old, hwloc_obj_t new)
{
/* drop old fields */
hwloc__free_object_contents(old);
/* copy old tree pointers to new */
new->parent = old->parent;
new->next_sibling = old->next_sibling;
new->first_child = old->first_child;
new->memory_first_child = old->memory_first_child;
new->io_first_child = old->io_first_child;
new->misc_first_child = old->misc_first_child;
/* copy new contents to old now that tree pointers are OK */
memcpy(old, new, sizeof(*old));
/* clear new to that we may free it */
memset(new, 0,sizeof(*new));
}
/* Remove an object and its children from its parent and free them.
* Only updates next_sibling/first_child pointers,
* so may only be used during early discovery or during destroy.
*/
static void
unlink_and_free_object_and_children(hwloc_obj_t *pobj)
{
hwloc_obj_t obj = *pobj, child, *pchild;
for_each_child_safe(child, obj, pchild)
unlink_and_free_object_and_children(pchild);
for_each_memory_child_safe(child, obj, pchild)
unlink_and_free_object_and_children(pchild);
for_each_io_child_safe(child, obj, pchild)
unlink_and_free_object_and_children(pchild);
for_each_misc_child_safe(child, obj, pchild)
unlink_and_free_object_and_children(pchild);
*pobj = obj->next_sibling;
hwloc_free_unlinked_object(obj);
}
/* Free an object and its children without unlinking from parent.
*/
void
hwloc_free_object_and_children(hwloc_obj_t obj)
{
unlink_and_free_object_and_children(&obj);
}
/* Free an object, its next siblings and their children without unlinking from parent.
*/
void
hwloc_free_object_siblings_and_children(hwloc_obj_t obj)
{
while (obj)
unlink_and_free_object_and_children(&obj);
}
/* insert the (non-empty) list of sibling starting at firstnew as new children of newparent,
* and return the address of the pointer to the next one
*/
static hwloc_obj_t *
insert_siblings_list(hwloc_obj_t *firstp, hwloc_obj_t firstnew, hwloc_obj_t newparent)
{
hwloc_obj_t tmp;
assert(firstnew);
*firstp = tmp = firstnew;
tmp->parent = newparent;
while (tmp->next_sibling) {
tmp = tmp->next_sibling;
tmp->parent = newparent;
}
return &tmp->next_sibling;
}
/* Take the new list starting at firstnew and prepend it to the old list starting at *firstp,
* and mark the new children as children of newparent.
* May be used during early or late discovery (updates prev_sibling and sibling_rank).
* List firstnew must be non-NULL.
*/
static void
prepend_siblings_list(hwloc_obj_t *firstp, hwloc_obj_t firstnew, hwloc_obj_t newparent)
{
hwloc_obj_t *tmpp, tmp, last;
unsigned length;
/* update parent pointers and find the length and end of the new list */
for(length = 0, tmpp = &firstnew, last = NULL ; *tmpp; length++, last = *tmpp, tmpp = &((*tmpp)->next_sibling))
(*tmpp)->parent = newparent;
/* update sibling_rank */
for(tmp = *firstp; tmp; tmp = tmp->next_sibling)
tmp->sibling_rank += length; /* if it wasn't initialized yet, it'll be overwritten later */
/* place the existing list at the end of the new one */
*tmpp = *firstp;
if (*firstp)
(*firstp)->prev_sibling = last;
/* use the beginning of the new list now */
*firstp = firstnew;
}
/* Take the new list starting at firstnew and append it to the old list starting at *firstp,
* and mark the new children as children of newparent.
* May be used during early or late discovery (updates prev_sibling and sibling_rank).
*/
static void
append_siblings_list(hwloc_obj_t *firstp, hwloc_obj_t firstnew, hwloc_obj_t newparent)
{
hwloc_obj_t *tmpp, tmp, last;
unsigned length;
/* find the length and end of the existing list */
for(length = 0, tmpp = firstp, last = NULL ; *tmpp; length++, last = *tmpp, tmpp = &((*tmpp)->next_sibling));
/* update parent pointers and sibling_rank */
for(tmp = firstnew; tmp; tmp = tmp->next_sibling) {
tmp->parent = newparent;
tmp->sibling_rank += length; /* if it wasn't set yet, it'll be overwritten later */
}
/* place new list at the end of the old one */
*tmpp = firstnew;
if (firstnew)
firstnew->prev_sibling = last;
}
/* Remove an object from its parent and free it.
* Only updates next_sibling/first_child pointers,
* so may only be used during early discovery.
*
* Children are inserted in the parent.
* If children should be inserted somewhere else (e.g. when merging with a child),
* the caller should move them before calling this function.
*/
static void
unlink_and_free_single_object(hwloc_obj_t *pparent)
{
hwloc_obj_t old = *pparent;
hwloc_obj_t *lastp;
if (old->type == HWLOC_OBJ_MISC) {
/* Misc object */
/* no normal children */
assert(!old->first_child);
/* no memory children */
assert(!old->memory_first_child);
/* no I/O children */
assert(!old->io_first_child);
if (old->misc_first_child)
/* insert old misc object children as new siblings below parent instead of old */
lastp = insert_siblings_list(pparent, old->misc_first_child, old->parent);
else
lastp = pparent;
/* append old siblings back */
*lastp = old->next_sibling;
} else if (hwloc__obj_type_is_io(old->type)) {
/* I/O object */
/* no normal children */
assert(!old->first_child);
/* no memory children */
assert(!old->memory_first_child);
if (old->io_first_child)
/* insert old I/O object children as new siblings below parent instead of old */
lastp = insert_siblings_list(pparent, old->io_first_child, old->parent);
else
lastp = pparent;
/* append old siblings back */
*lastp = old->next_sibling;
/* append old Misc children to parent */
if (old->misc_first_child)
append_siblings_list(&old->parent->misc_first_child, old->misc_first_child, old->parent);
} else if (hwloc__obj_type_is_memory(old->type)) {
/* memory object */
/* no normal children */
assert(!old->first_child);
/* no I/O children */
assert(!old->io_first_child);
if (old->memory_first_child)
/* insert old memory object children as new siblings below parent instead of old */
lastp = insert_siblings_list(pparent, old->memory_first_child, old->parent);
else
lastp = pparent;
/* append old siblings back */
*lastp = old->next_sibling;
/* append old Misc children to parent */
if (old->misc_first_child)
append_siblings_list(&old->parent->misc_first_child, old->misc_first_child, old->parent);
} else {
/* Normal object */
if (old->first_child)
/* insert old object children as new siblings below parent instead of old */
lastp = insert_siblings_list(pparent, old->first_child, old->parent);
else
lastp = pparent;
/* append old siblings back */
*lastp = old->next_sibling;
/* append old memory, I/O and Misc children to parent
* old->parent cannot be NULL (removing root), misc children should have been moved by the caller earlier.
*/
if (old->memory_first_child)
append_siblings_list(&old->parent->memory_first_child, old->memory_first_child, old->parent);
if (old->io_first_child)
append_siblings_list(&old->parent->io_first_child, old->io_first_child, old->parent);
if (old->misc_first_child)
append_siblings_list(&old->parent->misc_first_child, old->misc_first_child, old->parent);
}
hwloc_free_unlinked_object(old);
}
/* This function may use a tma, it cannot free() or realloc() */
static int
hwloc__duplicate_object(struct hwloc_topology *newtopology,
struct hwloc_obj *newparent,
struct hwloc_obj *newobj,
struct hwloc_obj *src)
{
struct hwloc_tma *tma = newtopology->tma;
hwloc_obj_t *level;
unsigned level_width;
size_t len;
unsigned i;
hwloc_obj_t child, prev;
int err = 0;
/* either we're duplicating to an already allocated new root, which has no newparent,
* or we're duplicating to a non-yet allocated new non-root, which will have a newparent.
*/
assert(!newparent == !!newobj);
if (!newobj) {
newobj = hwloc_alloc_setup_object(newtopology, src->type, src->os_index);
if (!newobj)
return -1;
}
/* duplicate all non-object-pointer fields */
newobj->logical_index = src->logical_index;
newobj->depth = src->depth;
newobj->sibling_rank = src->sibling_rank;
newobj->type = src->type;
newobj->os_index = src->os_index;
newobj->gp_index = src->gp_index;
newobj->symmetric_subtree = src->symmetric_subtree;
if (src->name)
newobj->name = hwloc_tma_strdup(tma, src->name);
if (src->subtype)
newobj->subtype = hwloc_tma_strdup(tma, src->subtype);
newobj->userdata = src->userdata;
newobj->total_memory = src->total_memory;
memcpy(newobj->attr, src->attr, sizeof(*newobj->attr));
if (src->type == HWLOC_OBJ_NUMANODE && src->attr->numanode.page_types_len) {
len = src->attr->numanode.page_types_len * sizeof(struct hwloc_memory_page_type_s);
newobj->attr->numanode.page_types = hwloc_tma_malloc(tma, len);
memcpy(newobj->attr->numanode.page_types, src->attr->numanode.page_types, len);
}
newobj->cpuset = hwloc_bitmap_tma_dup(tma, src->cpuset);
newobj->complete_cpuset = hwloc_bitmap_tma_dup(tma, src->complete_cpuset);
newobj->nodeset = hwloc_bitmap_tma_dup(tma, src->nodeset);
newobj->complete_nodeset = hwloc_bitmap_tma_dup(tma, src->complete_nodeset);
hwloc__tma_dup_infos(tma, &newobj->infos, &newobj->infos_count, src->infos, src->infos_count);
/* find our level */
if (src->depth < 0) {
i = HWLOC_SLEVEL_FROM_DEPTH(src->depth);
level = newtopology->slevels[i].objs;
level_width = newtopology->slevels[i].nbobjs;
/* deal with first/last pointers of special levels, even if not really needed */
if (!newobj->logical_index)
newtopology->slevels[i].first = newobj;
if (newobj->logical_index == newtopology->slevels[i].nbobjs - 1)
newtopology->slevels[i].last = newobj;
} else {
level = newtopology->levels[src->depth];
level_width = newtopology->level_nbobjects[src->depth];
}
/* place us for real */
assert(newobj->logical_index < level_width);
level[newobj->logical_index] = newobj;
/* link to already-inserted cousins */
if (newobj->logical_index > 0 && level[newobj->logical_index-1]) {
newobj->prev_cousin = level[newobj->logical_index-1];
level[newobj->logical_index-1]->next_cousin = newobj;
}
if (newobj->logical_index < level_width-1 && level[newobj->logical_index+1]) {
newobj->next_cousin = level[newobj->logical_index+1];
level[newobj->logical_index+1]->prev_cousin = newobj;
}
/* prepare for children */
if (src->arity) {
newobj->children = hwloc_tma_malloc(tma, src->arity * sizeof(*newobj->children));
if (!newobj->children)
return -1;
}
newobj->arity = src->arity;
newobj->memory_arity = src->memory_arity;
newobj->io_arity = src->io_arity;
newobj->misc_arity = src->misc_arity;
/* actually insert children now */
for_each_child(child, src) {
err = hwloc__duplicate_object(newtopology, newobj, NULL, child);
if (err < 0)
goto out_with_children;
}
for_each_memory_child(child, src) {
err = hwloc__duplicate_object(newtopology, newobj, NULL, child);
if (err < 0)
return err;
}
for_each_io_child(child, src) {
err = hwloc__duplicate_object(newtopology, newobj, NULL, child);
if (err < 0)
goto out_with_children;
}
for_each_misc_child(child, src) {
err = hwloc__duplicate_object(newtopology, newobj, NULL, child);
if (err < 0)
goto out_with_children;
}
out_with_children:
/* link children if all of them where inserted */
if (!err) {
/* only next_sibling is set by insert_by_parent().
* sibling_rank was set above.
*/
if (newobj->arity) {
newobj->children[0]->prev_sibling = NULL;
for(i=1; i<newobj->arity; i++)
newobj->children[i]->prev_sibling = newobj->children[i-1];
newobj->last_child = newobj->children[newobj->arity-1];
}
if (newobj->memory_arity) {
child = newobj->memory_first_child;
prev = NULL;
while (child) {
child->prev_sibling = prev;
prev = child;
child = child->next_sibling;
}
}
if (newobj->io_arity) {
child = newobj->io_first_child;
prev = NULL;
while (child) {
child->prev_sibling = prev;
prev = child;
child = child->next_sibling;
}
}
if (newobj->misc_arity) {
child = newobj->misc_first_child;
prev = NULL;
while (child) {
child->prev_sibling = prev;
prev = child;
child = child->next_sibling;
}
}
}