int main(void)
{
hwloc_topology_t topology;
hwloc_obj_t obj;
hwloc_topology_init(&topology);
hwloc_topology_set_io_types_filter(topology, HWLOC_TYPE_FILTER_KEEP_ALL);
hwloc_topology_load(topology);
printf("Found %d bridges\n", hwloc_get_nbobjs_by_type(topology, HWLOC_OBJ_BRIDGE));
obj = NULL;
while ((obj = hwloc_get_next_bridge(topology, obj)) != NULL) {
assert(obj->type == HWLOC_OBJ_BRIDGE);
/* only host->pci and pci->pci bridge supported so far */
if (obj->attr->bridge.upstream_type == HWLOC_OBJ_BRIDGE_HOST) {
assert(obj->attr->bridge.downstream_type == HWLOC_OBJ_BRIDGE_PCI);
printf(" Found host->PCI bridge for domain %04x bus %02x-%02x\n",
obj->attr->bridge.downstream.pci.domain,
obj->attr->bridge.downstream.pci.secondary_bus,
obj->attr->bridge.downstream.pci.subordinate_bus);
} else {
assert(obj->attr->bridge.upstream_type == HWLOC_OBJ_BRIDGE_PCI);
assert(obj->attr->bridge.downstream_type == HWLOC_OBJ_BRIDGE_PCI);
printf(" Found PCI->PCI bridge [%04x:%04x] for domain %04x bus %02x-%02x\n",
obj->attr->bridge.upstream.pci.vendor_id,
obj->attr->bridge.upstream.pci.device_id,
obj->attr->bridge.downstream.pci.domain,
obj->attr->bridge.downstream.pci.secondary_bus,
obj->attr->bridge.downstream.pci.subordinate_bus);
}
}
printf("Found %d PCI devices\n", hwloc_get_nbobjs_by_type(topology, HWLOC_OBJ_PCI_DEVICE));
obj = NULL;
while ((obj = hwloc_get_next_pcidev(topology, obj)) != NULL) {
assert(obj->type == HWLOC_OBJ_PCI_DEVICE);
printf(" Found PCI device class %04x vendor %04x model %04x\n",
obj->attr->pcidev.class_id, obj->attr->pcidev.vendor_id, obj->attr->pcidev.device_id);
}
printf("Found %d OS devices\n", hwloc_get_nbobjs_by_type(topology, HWLOC_OBJ_OS_DEVICE));
obj = NULL;
while ((obj = hwloc_get_next_osdev(topology, obj)) != NULL) {
assert(obj->type == HWLOC_OBJ_OS_DEVICE);
printf(" Found OS device %s subtype %d\n", obj->name, obj->attr->osdev.type);
}
assert(HWLOC_TYPE_DEPTH_BRIDGE == hwloc_get_type_depth(topology, HWLOC_OBJ_BRIDGE));
assert(HWLOC_TYPE_DEPTH_PCI_DEVICE == hwloc_get_type_depth(topology, HWLOC_OBJ_PCI_DEVICE));
assert(HWLOC_TYPE_DEPTH_OS_DEVICE == hwloc_get_type_depth(topology, HWLOC_OBJ_OS_DEVICE));
assert(hwloc_compare_types(HWLOC_OBJ_BRIDGE, HWLOC_OBJ_PCI_DEVICE) < 0);
assert(hwloc_compare_types(HWLOC_OBJ_BRIDGE, HWLOC_OBJ_OS_DEVICE) < 0);
assert(hwloc_compare_types(HWLOC_OBJ_PCI_DEVICE, HWLOC_OBJ_OS_DEVICE) < 0);
hwloc_topology_destroy(topology);
return 0;
}
int MPIR_Init_thread(int *argc, char ***argv, int required, int *provided)
{
int mpi_errno = MPI_SUCCESS;
int has_args;
int has_env;
int thread_provided = 0;
int exit_init_cs_on_failure = 0;
MPIR_Info *info_ptr;
#if defined(MPICH_IS_THREADED)
bool cs_initialized = false;
#endif
/* The threading library must be initialized at the very beginning because
* it manages all synchronization objects (e.g., mutexes) that will be
* initialized later */
{
int thread_err;
MPL_thread_init(&thread_err);
if (thread_err)
goto fn_fail;
}
#ifdef HAVE_HWLOC
MPIR_Process.bindset = hwloc_bitmap_alloc();
hwloc_topology_init(&MPIR_Process.hwloc_topology);
MPIR_Process.bindset_is_valid = 0;
hwloc_topology_set_io_types_filter(MPIR_Process.hwloc_topology, HWLOC_TYPE_FILTER_KEEP_ALL);
if (!hwloc_topology_load(MPIR_Process.hwloc_topology)) {
MPIR_Process.bindset_is_valid =
!hwloc_get_proc_cpubind(MPIR_Process.hwloc_topology, getpid(), MPIR_Process.bindset,
HWLOC_CPUBIND_PROCESS);
}
#endif
#ifdef HAVE_NETLOC
MPIR_Process.network_attr.u.tree.node_levels = NULL;
MPIR_Process.network_attr.network_endpoint = NULL;
MPIR_Process.netloc_topology = NULL;
MPIR_Process.network_attr.type = MPIR_NETLOC_NETWORK_TYPE__INVALID;
if (strlen(MPIR_CVAR_NETLOC_NODE_FILE)) {
mpi_errno =
netloc_parse_topology(&MPIR_Process.netloc_topology, MPIR_CVAR_NETLOC_NODE_FILE);
if (mpi_errno == NETLOC_SUCCESS) {
MPIR_Netloc_parse_topology(MPIR_Process.netloc_topology, &MPIR_Process.network_attr);
}
}
#endif
/* For any code in the device that wants to check for runtime
* decisions on the value of isThreaded, set a provisional
* value here. We could let the MPID_Init routine override this */
#if defined MPICH_IS_THREADED
MPIR_ThreadInfo.isThreaded = required == MPI_THREAD_MULTIPLE;
#endif /* MPICH_IS_THREADED */
#if defined(MPICH_IS_THREADED)
mpi_errno = thread_cs_init();
cs_initialized = true;
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
#endif
/* FIXME: Move to os-dependent interface? */
#ifdef HAVE_WINDOWS_H
/* prevent the process from bringing up an error message window if mpich
* asserts */
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
_CrtSetReportHook2(_CRT_RPTHOOK_INSTALL, assert_hook);
#ifdef _WIN64
{
/* FIXME: (Windows) This severly degrades performance but fixes alignment
* issues with the datatype code. */
/* Prevent misaligned faults on Win64 machines */
UINT mode, old_mode;
old_mode = SetErrorMode(SEM_NOALIGNMENTFAULTEXCEPT);
mode = old_mode | SEM_NOALIGNMENTFAULTEXCEPT;
SetErrorMode(mode);
}
#endif
#endif
/* We need this inorder to implement IS_THREAD_MAIN */
#if (MPICH_THREAD_LEVEL >= MPI_THREAD_SERIALIZED) && defined(MPICH_IS_THREADED)
{
MPID_Thread_self(&MPIR_ThreadInfo.master_thread);
}
#endif
#ifdef HAVE_ERROR_CHECKING
/* Because the PARAM system has not been initialized, temporarily
* uncondtionally enable error checks. Once the PARAM system is
* initialized, this may be reset */
MPIR_Process.do_error_checks = 1;
#else
MPIR_Process.do_error_checks = 0;
#endif
/* Initialize necessary subsystems and setup the predefined attribute
* values. Subsystems may change these values. */
MPIR_Process.attrs.appnum = -1;
MPIR_Process.attrs.host = MPI_PROC_NULL;
MPIR_Process.attrs.io = MPI_PROC_NULL;
MPIR_Process.attrs.lastusedcode = MPI_ERR_LASTCODE;
MPIR_Process.attrs.universe = MPIR_UNIVERSE_SIZE_NOT_SET;
MPIR_Process.attrs.wtime_is_global = 0;
/* Set the functions used to duplicate attributes. These are
* when the first corresponding keyval is created */
MPIR_Process.attr_dup = 0;
MPIR_Process.attr_free = 0;
#ifdef HAVE_CXX_BINDING
/* Set the functions used to call functions in the C++ binding
* for reductions and attribute operations. These are null
* until a C++ operation is defined. This allows the C code
* that implements these operations to not invoke a C++ code
* directly, which may force the inclusion of symbols known only
* to the C++ compiler (e.g., under more non-GNU compilers, including
* Solaris and IRIX). */
MPIR_Process.cxx_call_op_fn = 0;
#endif
#ifdef HAVE_F08_BINDING
MPIR_C_MPI_UNWEIGHTED = MPI_UNWEIGHTED;
MPIR_C_MPI_WEIGHTS_EMPTY = MPI_WEIGHTS_EMPTY;
#endif
/* This allows the device to select an alternative function for
* dimsCreate */
MPIR_Process.dimsCreate = 0;
/* "Allocate" from the reserved space for builtin communicators and
* (partially) initialize predefined communicators. comm_parent is
* intially NULL and will be allocated by the device if the process group
* was started using one of the MPI_Comm_spawn functions. */
MPIR_Process.comm_world = MPIR_Comm_builtin + 0;
MPII_Comm_init(MPIR_Process.comm_world);
MPIR_Process.comm_world->handle = MPI_COMM_WORLD;
MPIR_Process.comm_world->context_id = 0 << MPIR_CONTEXT_PREFIX_SHIFT;
MPIR_Process.comm_world->recvcontext_id = 0 << MPIR_CONTEXT_PREFIX_SHIFT;
MPIR_Process.comm_world->comm_kind = MPIR_COMM_KIND__INTRACOMM;
/* This initialization of the comm name could be done only when
* comm_get_name is called */
MPL_strncpy(MPIR_Process.comm_world->name, "MPI_COMM_WORLD", MPI_MAX_OBJECT_NAME);
MPIR_Process.comm_self = MPIR_Comm_builtin + 1;
MPII_Comm_init(MPIR_Process.comm_self);
MPIR_Process.comm_self->handle = MPI_COMM_SELF;
MPIR_Process.comm_self->context_id = 1 << MPIR_CONTEXT_PREFIX_SHIFT;
MPIR_Process.comm_self->recvcontext_id = 1 << MPIR_CONTEXT_PREFIX_SHIFT;
MPIR_Process.comm_self->comm_kind = MPIR_COMM_KIND__INTRACOMM;
MPL_strncpy(MPIR_Process.comm_self->name, "MPI_COMM_SELF", MPI_MAX_OBJECT_NAME);
#ifdef MPID_NEEDS_ICOMM_WORLD
MPIR_Process.icomm_world = MPIR_Comm_builtin + 2;
MPII_Comm_init(MPIR_Process.icomm_world);
MPIR_Process.icomm_world->handle = MPIR_ICOMM_WORLD;
MPIR_Process.icomm_world->context_id = 2 << MPIR_CONTEXT_PREFIX_SHIFT;
MPIR_Process.icomm_world->recvcontext_id = 2 << MPIR_CONTEXT_PREFIX_SHIFT;
MPIR_Process.icomm_world->comm_kind = MPIR_COMM_KIND__INTRACOMM;
MPL_strncpy(MPIR_Process.icomm_world->name, "MPI_ICOMM_WORLD", MPI_MAX_OBJECT_NAME);
/* Note that these communicators are not ready for use - MPID_Init
* will setup self and world, and icomm_world if it desires it. */
#endif
MPIR_Process.comm_parent = NULL;
/* Setup the initial communicator list in case we have
* enabled the debugger message-queue interface */
MPII_COMML_REMEMBER(MPIR_Process.comm_world);
MPII_COMML_REMEMBER(MPIR_Process.comm_self);
/* MPIU_Timer_pre_init(); */
/* Wait for debugger to attach if requested. */
if (MPIR_CVAR_DEBUG_HOLD) {
volatile int hold = 1;
while (hold)
#ifdef HAVE_USLEEP
usleep(100);
#endif
;
}
#if defined(HAVE_ERROR_CHECKING) && (HAVE_ERROR_CHECKING == MPID_ERROR_LEVEL_RUNTIME)
MPIR_Process.do_error_checks = MPIR_CVAR_ERROR_CHECKING;
#endif
/* define MPI as initialized so that we can use MPI functions within
* MPID_Init if necessary */
OPA_store_int(&MPIR_Process.mpich_state, MPICH_MPI_STATE__IN_INIT);
/* We can't acquire any critical sections until this point. Any
* earlier the basic data structures haven't been initialized */
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
exit_init_cs_on_failure = 1;
/* create MPI_INFO_NULL object */
/* FIXME: Currently this info object is empty, we need to add data to this
* as defined by the standard. */
info_ptr = MPIR_Info_builtin + 1;
info_ptr->handle = MPI_INFO_ENV;
MPIR_Object_set_ref(info_ptr, 1);
info_ptr->next = NULL;
info_ptr->key = NULL;
info_ptr->value = NULL;
#ifdef USE_MEMORY_TRACING
MPL_trinit();
#endif
/* Set the number of tag bits. The device may override this value. */
MPIR_Process.tag_bits = MPIR_TAG_BITS_DEFAULT;
/* Create complete request to return in the event of immediately complete
* operations. Use a SEND request to cover all possible use-cases. */
MPIR_Process.lw_req = MPIR_Request_create(MPIR_REQUEST_KIND__SEND);
MPIR_ERR_CHKANDSTMT(MPIR_Process.lw_req == NULL, mpi_errno, MPIX_ERR_NOREQ, goto fn_fail,
"**nomemreq");
MPIR_cc_set(&MPIR_Process.lw_req->cc, 0);
mpi_errno = MPID_Init(argc, argv, required, &thread_provided, &has_args, &has_env);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
/* Initialize collectives infrastructure */
mpi_errno = MPII_Coll_init();
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
/* Set tag_ub as function of tag_bits set by the device */
MPIR_Process.attrs.tag_ub = MPIR_TAG_USABLE_BITS;
/* Assert: tag_ub should be a power of 2 minus 1 */
MPIR_Assert(((unsigned) MPIR_Process.
attrs.tag_ub & ((unsigned) MPIR_Process.attrs.tag_ub + 1)) == 0);
/* Assert: tag_ub is at least the minimum asked for in the MPI spec */
MPIR_Assert(MPIR_Process.attrs.tag_ub >= 32767);
/* Capture the level of thread support provided */
MPIR_ThreadInfo.thread_provided = thread_provided;
if (provided)
*provided = thread_provided;
#if defined MPICH_IS_THREADED
MPIR_ThreadInfo.isThreaded = (thread_provided == MPI_THREAD_MULTIPLE);
#endif /* MPICH_IS_THREADED */
/* FIXME: Define these in the interface. Does Timer init belong here? */
MPII_Timer_init(MPIR_Process.comm_world->rank, MPIR_Process.comm_world->local_size);
#ifdef USE_MEMORY_TRACING
#ifdef MPICH_IS_THREADED
MPL_trconfig(MPIR_Process.comm_world->rank, MPIR_ThreadInfo.isThreaded);
#else
MPL_trconfig(MPIR_Process.comm_world->rank, 0);
#endif
/* Indicate that we are near the end of the init step; memory
* allocated already will have an id of zero; this helps
* separate memory leaks in the initialization code from
* leaks in the "active" code */
#endif
#ifdef MPL_USE_DBG_LOGGING
/* FIXME: This is a hack to handle the common case of two worlds.
* If the parent comm is not NULL, we always give the world number
* as "1" (false). */
#ifdef MPICH_IS_THREADED
MPL_dbg_init(argc, argv, has_args, has_env,
MPIR_Process.comm_parent != NULL, MPIR_Process.comm_world->rank,
MPIR_ThreadInfo.isThreaded);
#else
MPL_dbg_init(argc, argv, has_args, has_env,
MPIR_Process.comm_parent != NULL, MPIR_Process.comm_world->rank, 0);
#endif
MPIR_DBG_INIT = MPL_dbg_class_alloc("INIT", "init");
MPIR_DBG_PT2PT = MPL_dbg_class_alloc("PT2PT", "pt2pt");
MPIR_DBG_THREAD = MPL_dbg_class_alloc("THREAD", "thread");
MPIR_DBG_DATATYPE = MPL_dbg_class_alloc("DATATYPE", "datatype");
MPIR_DBG_HANDLE = MPL_dbg_class_alloc("HANDLE", "handle");
MPIR_DBG_COMM = MPL_dbg_class_alloc("COMM", "comm");
MPIR_DBG_BSEND = MPL_dbg_class_alloc("BSEND", "bsend");
MPIR_DBG_ERRHAND = MPL_dbg_class_alloc("ERRHAND", "errhand");
MPIR_DBG_OTHER = MPL_dbg_class_alloc("OTHER", "other");
MPIR_DBG_REQUEST = MPL_dbg_class_alloc("REQUEST", "request");
MPIR_DBG_COLL = MPL_dbg_class_alloc("COLL", "coll");
MPIR_DBG_ASSERT = MPL_dbg_class_alloc("ASSERT", "assert");
MPIR_DBG_STRING = MPL_dbg_class_alloc("STRING", "string");
#endif
/* Initialize the C versions of the Fortran link-time constants.
*
* We now initialize the Fortran symbols from within the Fortran
* interface in the routine that first needs the symbols.
* This fixes a problem with symbols added by a Fortran compiler that
* are not part of the C runtime environment (the Portland group
* compilers would do this)
*/
#if defined(HAVE_FORTRAN_BINDING) && defined(HAVE_MPI_F_INIT_WORKS_WITH_C)
mpirinitf_();
#endif
/* FIXME: Does this need to come before the call to MPID_InitComplete?
* For some debugger support, MPII_Wait_for_debugger may want to use
* MPI communication routines to collect information for the debugger */
#ifdef HAVE_DEBUGGER_SUPPORT
MPII_Wait_for_debugger();
#endif
/* Let the device know that the rest of the init process is completed */
if (mpi_errno == MPI_SUCCESS)
mpi_errno = MPID_InitCompleted();
MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
/* Make fields of MPIR_Process global visible and set mpich_state
* atomically so that MPI_Initialized() etc. are thread safe */
OPA_write_barrier();
OPA_store_int(&MPIR_Process.mpich_state, MPICH_MPI_STATE__POST_INIT);
return mpi_errno;
fn_fail:
/* --BEGIN ERROR HANDLING-- */
/* signal to error handling routines that core services are unavailable */
OPA_store_int(&MPIR_Process.mpich_state, MPICH_MPI_STATE__PRE_INIT);
if (exit_init_cs_on_failure) {
MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
}
#if defined(MPICH_IS_THREADED)
if (cs_initialized) {
MPIR_Thread_CS_Finalize();
}
#endif
return mpi_errno;
/* --END ERROR HANDLING-- */
}
int
pocl_topology_detect_device_info(cl_device_id device)
{
hwloc_topology_t pocl_topology;
int ret = 0;
#ifdef HWLOC_API_2
if (hwloc_get_api_version () < 0x20000)
POCL_MSG_ERR ("pocl was compiled against libhwloc 2.x but is"
"actually running against libhwloc 1.x \n");
#else
if (hwloc_get_api_version () >= 0x20000)
POCL_MSG_ERR ("pocl was compiled against libhwloc 1.x but is"
"actually running against libhwloc 2.x \n");
#endif
/*
* hwloc's OpenCL backend causes problems at the initialization stage
* because it reloads libpocl.so via the ICD loader.
*
* See: https://github.com/pocl/pocl/issues/261
*
* The only trick to stop hwloc from initializing the OpenCL plugin
* I could find is to point the plugin search path to a place where there
* are no plugins to be found.
*/
setenv ("HWLOC_PLUGINS_PATH", "/dev/null", 1);
ret = hwloc_topology_init (&pocl_topology);
if (ret == -1)
{
POCL_MSG_ERR ("Cannot initialize the topology.\n");
return ret;
}
#ifdef HWLOC_API_2
hwloc_topology_set_io_types_filter(pocl_topology, HWLOC_TYPE_FILTER_KEEP_NONE);
hwloc_topology_set_type_filter (pocl_topology, HWLOC_OBJ_SYSTEM, HWLOC_TYPE_FILTER_KEEP_NONE);
hwloc_topology_set_type_filter (pocl_topology, HWLOC_OBJ_GROUP, HWLOC_TYPE_FILTER_KEEP_NONE);
hwloc_topology_set_type_filter (pocl_topology, HWLOC_OBJ_BRIDGE, HWLOC_TYPE_FILTER_KEEP_NONE);
hwloc_topology_set_type_filter (pocl_topology, HWLOC_OBJ_MISC, HWLOC_TYPE_FILTER_KEEP_NONE);
hwloc_topology_set_type_filter (pocl_topology, HWLOC_OBJ_PCI_DEVICE, HWLOC_TYPE_FILTER_KEEP_NONE);
hwloc_topology_set_type_filter (pocl_topology, HWLOC_OBJ_OS_DEVICE, HWLOC_TYPE_FILTER_KEEP_NONE);
#else
hwloc_topology_ignore_type (pocl_topology, HWLOC_TOPOLOGY_FLAG_WHOLE_IO);
hwloc_topology_ignore_type (pocl_topology, HWLOC_OBJ_SYSTEM);
hwloc_topology_ignore_type (pocl_topology, HWLOC_OBJ_GROUP);
hwloc_topology_ignore_type (pocl_topology, HWLOC_OBJ_BRIDGE);
hwloc_topology_ignore_type (pocl_topology, HWLOC_OBJ_MISC);
hwloc_topology_ignore_type (pocl_topology, HWLOC_OBJ_PCI_DEVICE);
hwloc_topology_ignore_type (pocl_topology, HWLOC_OBJ_OS_DEVICE);
#endif
ret = hwloc_topology_load (pocl_topology);
if (ret == -1)
{
POCL_MSG_ERR ("Cannot load the topology.\n");
goto exit_destroy;
}
#ifdef HWLOC_API_2
device->global_mem_size =
hwloc_get_root_obj(pocl_topology)->total_memory;
#else
device->global_mem_size =
hwloc_get_root_obj(pocl_topology)->memory.total_memory;
#endif
// Try to get the number of CPU cores from topology
int depth = hwloc_get_type_depth(pocl_topology, HWLOC_OBJ_PU);
if(depth != HWLOC_TYPE_DEPTH_UNKNOWN)
device->max_compute_units = hwloc_get_nbobjs_by_depth(pocl_topology, depth);
/* Find information about global memory cache by looking at the first
* cache covering the first PU */
do {
size_t cache_size = 0, cacheline_size = 0;
hwloc_obj_t core
= hwloc_get_next_obj_by_type (pocl_topology, HWLOC_OBJ_CORE, NULL);
if (core)
{
hwloc_obj_t cache
= hwloc_get_shared_cache_covering_obj (pocl_topology, core);
if ((cache) && (cache->attr))
{
cacheline_size = cache->attr->cache.linesize;
cache_size = cache->attr->cache.size;
}
else
core = NULL; /* fallback to L1 cache size */
}
hwloc_obj_t pu
= hwloc_get_next_obj_by_type (pocl_topology, HWLOC_OBJ_PU, NULL);
if (!core && pu)
{
hwloc_obj_t cache
= hwloc_get_shared_cache_covering_obj (pocl_topology, pu);
if ((cache) && (cache->attr))
{
cacheline_size = cache->attr->cache.linesize;
cache_size = cache->attr->cache.size;
}
}
if (!cache_size || !cacheline_size)
break;
device->global_mem_cache_type
= 0x2; // CL_READ_WRITE_CACHE, without including all of CL/cl.h
device->global_mem_cacheline_size = cacheline_size;
device->global_mem_cache_size = cache_size;
} while (0);
// Destroy topology object and return
exit_destroy:
hwloc_topology_destroy (pocl_topology);
return ret;
}
