552c9ca5a0
WHAT: Open our low-level communication infrastructure by moving all necessary components (btl/rcache/allocator/mpool) down in OPAL All the components required for inter-process communications are currently deeply integrated in the OMPI layer. Several groups/institutions have express interest in having a more generic communication infrastructure, without all the OMPI layer dependencies. This communication layer should be made available at a different software level, available to all layers in the Open MPI software stack. As an example, our ORTE layer could replace the current OOB and instead use the BTL directly, gaining access to more reactive network interfaces than TCP. Similarly, external software libraries could take advantage of our highly optimized AM (active message) communication layer for their own purpose. UTK with support from Sandia, developped a version of Open MPI where the entire communication infrastucture has been moved down to OPAL (btl/rcache/allocator/mpool). Most of the moved components have been updated to match the new schema, with few exceptions (mainly BTLs where I have no way of compiling/testing them). Thus, the completion of this RFC is tied to being able to completing this move for all BTLs. For this we need help from the rest of the Open MPI community, especially those supporting some of the BTLs. A non-exhaustive list of BTLs that qualify here is: mx, portals4, scif, udapl, ugni, usnic. This commit was SVN r32317.
507 строки
15 KiB
C
507 строки
15 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2012 Sandia National Laboratories. All rights reserved.
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* Copyright (c) 2014 Los Alamos National Security, LLC. All rights
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* reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include "ompi/mca/osc/osc.h"
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#include "ompi/mca/osc/base/base.h"
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#include "ompi/mca/osc/base/osc_base_obj_convert.h"
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#include "ompi/request/request.h"
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#include "opal/class/ompi_free_list.h"
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#include "osc_sm.h"
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static int component_open(void);
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static int component_init(bool enable_progress_threads, bool enable_mpi_threads);
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static int component_finalize(void);
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static int component_query(struct ompi_win_t *win, void **base, size_t size, int disp_unit,
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struct ompi_communicator_t *comm, struct ompi_info_t *info,
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int flavor);
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static int component_select(struct ompi_win_t *win, void **base, size_t size, int disp_unit,
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struct ompi_communicator_t *comm, struct ompi_info_t *info,
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int flavor, int *model);
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ompi_osc_sm_component_t mca_osc_sm_component = {
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{ /* ompi_osc_base_component_t */
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{ /* ompi_base_component_t */
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OMPI_OSC_BASE_VERSION_3_0_0,
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"sm",
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OMPI_MAJOR_VERSION, /* MCA component major version */
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OMPI_MINOR_VERSION, /* MCA component minor version */
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OMPI_RELEASE_VERSION, /* MCA component release version */
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component_open,
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NULL
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},
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{ /* mca_base_component_data */
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/* The component is not checkpoint ready */
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MCA_BASE_METADATA_PARAM_NONE
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},
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component_init,
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component_query,
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component_select,
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component_finalize
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}
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};
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ompi_osc_sm_module_t ompi_osc_sm_module_template = {
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{
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ompi_osc_sm_shared_query,
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ompi_osc_sm_attach,
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ompi_osc_sm_detach,
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ompi_osc_sm_free,
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ompi_osc_sm_put,
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ompi_osc_sm_get,
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ompi_osc_sm_accumulate,
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ompi_osc_sm_compare_and_swap,
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ompi_osc_sm_fetch_and_op,
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ompi_osc_sm_get_accumulate,
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ompi_osc_sm_rput,
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ompi_osc_sm_rget,
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ompi_osc_sm_raccumulate,
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ompi_osc_sm_rget_accumulate,
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ompi_osc_sm_fence,
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ompi_osc_sm_start,
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ompi_osc_sm_complete,
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ompi_osc_sm_post,
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ompi_osc_sm_wait,
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ompi_osc_sm_test,
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ompi_osc_sm_lock,
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ompi_osc_sm_unlock,
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ompi_osc_sm_lock_all,
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ompi_osc_sm_unlock_all,
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ompi_osc_sm_sync,
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ompi_osc_sm_flush,
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ompi_osc_sm_flush_all,
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ompi_osc_sm_flush_local,
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ompi_osc_sm_flush_local_all,
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ompi_osc_sm_set_info,
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ompi_osc_sm_get_info
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}
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};
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static int
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component_open(void)
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{
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return OMPI_SUCCESS;
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}
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static int
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component_init(bool enable_progress_threads, bool enable_mpi_threads)
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{
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return OMPI_SUCCESS;
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}
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static int
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component_finalize(void)
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{
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/* clean up requests free list */
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return OMPI_SUCCESS;
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}
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static int
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check_win_ok(ompi_communicator_t *comm, int flavor)
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{
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int i;
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if (! (MPI_WIN_FLAVOR_SHARED == flavor
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|| MPI_WIN_FLAVOR_ALLOCATE == flavor) ) {
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return OMPI_ERR_NOT_SUPPORTED;
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}
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for (i = 0 ; i < ompi_comm_size(comm) ; ++i) {
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if (!OPAL_PROC_ON_LOCAL_NODE(ompi_comm_peer_lookup(comm, i)->super.proc_flags)) {
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return OMPI_ERR_RMA_SHARED;
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}
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}
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return OMPI_SUCCESS;
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}
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static int
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component_query(struct ompi_win_t *win, void **base, size_t size, int disp_unit,
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struct ompi_communicator_t *comm, struct ompi_info_t *info,
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int flavor)
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{
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int ret;
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if (OMPI_SUCCESS != (ret = check_win_ok(comm, flavor))) {
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if (OMPI_ERR_NOT_SUPPORTED == ret) {
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return -1;
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}
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return ret;
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}
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return 100;
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}
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static int
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component_select(struct ompi_win_t *win, void **base, size_t size, int disp_unit,
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struct ompi_communicator_t *comm, struct ompi_info_t *info,
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int flavor, int *model)
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{
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ompi_osc_sm_module_t *module = NULL;
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int ret = OMPI_ERROR;
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if (OMPI_SUCCESS != (ret = check_win_ok(comm, flavor))) {
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return ret;
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}
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/* create module structure */
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module = (ompi_osc_sm_module_t*)
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calloc(1, sizeof(ompi_osc_sm_module_t));
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if (NULL == module) return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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/* fill in the function pointer part */
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memcpy(module, &ompi_osc_sm_module_template,
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sizeof(ompi_osc_base_module_t));
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/* need our communicator for collectives in next phase */
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ret = ompi_comm_dup(comm, &module->comm);
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if (OMPI_SUCCESS != ret) goto error;
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module->flavor = flavor;
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/* create the segment */
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if (1 == ompi_comm_size(comm)) {
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module->segment_base = NULL;
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module->sizes = malloc(sizeof(size_t));
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if (NULL == module->sizes) return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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module->bases = malloc(sizeof(void*));
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if (NULL == module->bases) return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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module->sizes[0] = size;
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module->bases[0] = malloc(size);
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if (NULL == module->bases[0]) return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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module->global_state = malloc(sizeof(ompi_osc_sm_global_state_t));
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if (NULL == module->global_state) return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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module->node_states = malloc(sizeof(ompi_osc_sm_node_state_t));
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if (NULL == module->node_states) return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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} else {
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unsigned long total, *rbuf;
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char *data_file;
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int i, flag;
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size_t pagesize;
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size_t state_size;
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OPAL_OUTPUT_VERBOSE((1, ompi_osc_base_framework.framework_output,
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"allocating shared memory region of size %ld\n", (long) size));
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#ifdef HAVE_GETPAGESIZE
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pagesize = getpagesize();
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#else
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pagesize = 4096;
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#endif
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rbuf = malloc(sizeof(unsigned long) * ompi_comm_size(module->comm));
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if (NULL == rbuf) return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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module->noncontig = false;
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if (OMPI_SUCCESS != ompi_info_get_bool(info, "alloc_shared_noncontig",
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&module->noncontig, &flag)) {
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goto error;
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}
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if (module->noncontig) {
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total = ((size - 1) / pagesize + 1) * pagesize;
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} else {
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total = size;
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}
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ret = module->comm->c_coll.coll_allgather(&total, 1, MPI_UNSIGNED_LONG,
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rbuf, 1, MPI_UNSIGNED_LONG,
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module->comm,
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module->comm->c_coll.coll_allgather_module);
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if (OMPI_SUCCESS != ret) return ret;
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total = 0;
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for (i = 0 ; i < ompi_comm_size(module->comm) ; ++i) {
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total += rbuf[i];
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}
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if (asprintf(&data_file, "%s"OPAL_PATH_SEP"shared_window_%d.%s",
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ompi_process_info.job_session_dir,
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ompi_comm_get_cid(module->comm),
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ompi_process_info.nodename) < 0) {
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return OMPI_ERR_OUT_OF_RESOURCE;
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}
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/* user opal/shmem directly to create a shared memory segment */
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state_size = sizeof(ompi_osc_sm_global_state_t) + sizeof(ompi_osc_sm_node_state_t) * ompi_comm_size(module->comm);
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if (0 == ompi_comm_rank (module->comm)) {
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ret = opal_shmem_segment_create (&module->seg_ds, data_file, total + pagesize + state_size);
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if (OPAL_SUCCESS != ret) {
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goto error;
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}
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}
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ret = module->comm->c_coll.coll_bcast (&module->seg_ds, sizeof (module->seg_ds), MPI_BYTE, 0,
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module->comm, module->comm->c_coll.coll_bcast_module);
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if (OMPI_SUCCESS != ret) {
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goto error;
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}
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module->segment_base = opal_shmem_segment_attach (&module->seg_ds);
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if (NULL == module->segment_base) {
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goto error;
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}
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module->sizes = malloc(sizeof(size_t) * ompi_comm_size(module->comm));
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if (NULL == module->sizes) return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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module->bases = malloc(sizeof(void*) * ompi_comm_size(module->comm));
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if (NULL == module->bases) return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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module->global_state = (ompi_osc_sm_global_state_t *) (module->segment_base);
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module->node_states = (ompi_osc_sm_node_state_t *) (module->global_state + 1);
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for (i = 0, total = state_size ; i < ompi_comm_size(module->comm) ; ++i) {
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module->sizes[i] = rbuf[i];
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if (module->sizes[i]) {
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module->bases[i] = ((char *) module->segment_base) + total;
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total += rbuf[i];
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} else {
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module->bases[i] = NULL;
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}
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}
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free(rbuf);
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}
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/* initialize my state shared */
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module->my_node_state = &module->node_states[ompi_comm_rank(module->comm)];
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memset (module->my_node_state, 0, sizeof(*module->my_node_state));
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*base = module->bases[ompi_comm_rank(module->comm)];
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opal_atomic_init(&module->my_node_state->accumulate_lock, OPAL_ATOMIC_UNLOCKED);
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/* share everyone's displacement units. */
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module->disp_units = malloc(sizeof(int) * ompi_comm_size(module->comm));
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ret = module->comm->c_coll.coll_allgather(&disp_unit, 1, MPI_INT,
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module->disp_units, 1, MPI_INT,
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module->comm,
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module->comm->c_coll.coll_allgather_module);
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if (OMPI_SUCCESS != ret) goto error;
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module->start_group = NULL;
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module->post_group = NULL;
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/* initialize synchronization code */
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module->my_sense = 1;
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module->outstanding_locks = calloc(ompi_comm_size(module->comm), sizeof(enum ompi_osc_sm_locktype_t));
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if (NULL == module->outstanding_locks) {
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ret = OMPI_ERR_TEMP_OUT_OF_RESOURCE;
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goto error;
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}
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if (0 == ompi_comm_rank(module->comm)) {
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#if HAVE_PTHREAD_CONDATTR_SETPSHARED && HAVE_PTHREAD_MUTEXATTR_SETPSHARED
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pthread_mutexattr_t mattr;
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pthread_condattr_t cattr;
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bool blocking_fence;
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int flag;
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if (OMPI_SUCCESS != ompi_info_get_bool(info, "blocking_fence",
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&blocking_fence, &flag)) {
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goto error;
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}
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if (blocking_fence) {
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ret = pthread_mutexattr_init(&mattr);
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ret = pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED);
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if (ret != 0) {
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module->global_state->use_barrier_for_fence = 1;
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} else {
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ret = pthread_mutex_init(&module->global_state->mtx, &mattr);
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if (ret != 0) {
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module->global_state->use_barrier_for_fence = 1;
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} else {
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pthread_condattr_init(&cattr);
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pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED);
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ret = pthread_cond_init(&module->global_state->cond, &cattr);
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if (ret != 0) return OMPI_ERROR;
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pthread_condattr_destroy(&cattr);
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}
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}
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module->global_state->use_barrier_for_fence = 0;
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module->global_state->sense = module->my_sense;
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module->global_state->count = ompi_comm_size(module->comm);
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pthread_mutexattr_destroy(&mattr);
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} else {
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module->global_state->use_barrier_for_fence = 1;
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}
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#else
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module->global_state->use_barrier_for_fence = 1;
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#endif
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}
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ret = module->comm->c_coll.coll_barrier(module->comm,
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module->comm->c_coll.coll_barrier_module);
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if (OMPI_SUCCESS != ret) goto error;
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*model = MPI_WIN_UNIFIED;
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win->w_osc_module = &module->super;
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return OMPI_SUCCESS;
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error:
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if (NULL != module->comm) ompi_comm_free(&module->comm);
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if (NULL != module) free(module);
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return ret;
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}
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int
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ompi_osc_sm_shared_query(struct ompi_win_t *win, int rank, size_t *size, int *disp_unit, void *baseptr)
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{
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ompi_osc_sm_module_t *module =
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(ompi_osc_sm_module_t*) win->w_osc_module;
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if (module->flavor != MPI_WIN_FLAVOR_SHARED) {
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return MPI_ERR_WIN;
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}
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if (MPI_PROC_NULL != rank) {
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*size = module->sizes[rank];
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*((void**) baseptr) = module->bases[rank];
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*disp_unit = module->disp_units[rank];
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} else {
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int i = 0;
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*size = 0;
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*((void**) baseptr) = NULL;
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*disp_unit = 0;
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for (i = 0 ; i < ompi_comm_size(module->comm) ; ++i) {
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if (0 != module->sizes[i]) {
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*size = module->sizes[i];
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*((void**) baseptr) = module->bases[i];
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*disp_unit = module->disp_units[i];
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break;
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}
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}
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}
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return OMPI_SUCCESS;
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}
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int
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ompi_osc_sm_attach(struct ompi_win_t *win, void *base, size_t len)
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{
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ompi_osc_sm_module_t *module =
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(ompi_osc_sm_module_t*) win->w_osc_module;
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if (module->flavor != MPI_WIN_FLAVOR_DYNAMIC) {
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return MPI_ERR_RMA_ATTACH;
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}
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return OMPI_SUCCESS;
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}
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int
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ompi_osc_sm_detach(struct ompi_win_t *win, void *base)
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{
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ompi_osc_sm_module_t *module =
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(ompi_osc_sm_module_t*) win->w_osc_module;
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if (module->flavor != MPI_WIN_FLAVOR_DYNAMIC) {
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return MPI_ERR_RMA_ATTACH;
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}
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return OMPI_SUCCESS;
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}
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int
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ompi_osc_sm_free(struct ompi_win_t *win)
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{
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ompi_osc_sm_module_t *module =
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(ompi_osc_sm_module_t*) win->w_osc_module;
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/* free memory */
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if (NULL != module->segment_base) {
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/* synchronize */
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module->comm->c_coll.coll_barrier(module->comm,
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module->comm->c_coll.coll_barrier_module);
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if (0 == ompi_comm_rank (module->comm)) {
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opal_shmem_unlink (&module->seg_ds);
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}
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opal_shmem_segment_detach (&module->seg_ds);
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} else {
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free(module->node_states);
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free(module->global_state);
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free(module->bases[0]);
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free(module->bases);
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free(module->sizes);
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}
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/* cleanup */
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ompi_comm_free(&module->comm);
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free(module);
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return OMPI_SUCCESS;
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}
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int
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ompi_osc_sm_set_info(struct ompi_win_t *win, struct ompi_info_t *info)
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{
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ompi_osc_sm_module_t *module =
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(ompi_osc_sm_module_t*) win->w_osc_module;
|
|
|
|
/* enforce collectiveness... */
|
|
return module->comm->c_coll.coll_barrier(module->comm,
|
|
module->comm->c_coll.coll_barrier_module);
|
|
}
|
|
|
|
|
|
int
|
|
ompi_osc_sm_get_info(struct ompi_win_t *win, struct ompi_info_t **info_used)
|
|
{
|
|
ompi_osc_sm_module_t *module =
|
|
(ompi_osc_sm_module_t*) win->w_osc_module;
|
|
|
|
ompi_info_t *info = OBJ_NEW(ompi_info_t);
|
|
if (NULL == info) return OMPI_ERR_TEMP_OUT_OF_RESOURCE;
|
|
|
|
if (module->flavor == MPI_WIN_FLAVOR_SHARED) {
|
|
ompi_info_set(info, "blocking_fence",
|
|
(1 == module->global_state->use_barrier_for_fence) ? "true" : "false");
|
|
ompi_info_set(info, "alloc_shared_noncontig",
|
|
(module->noncontig) ? "true" : "false");
|
|
}
|
|
|
|
*info_used = info;
|
|
|
|
return OMPI_SUCCESS;
|
|
}
|