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.
116 строки
4.6 KiB
C
116 строки
4.6 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2011-2012 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2011 UT-Battelle, LLC. All rights 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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#if !defined(MCA_BTL_UGNI_RDMA_H)
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#define MCA_BTL_UGNI_RDMA_H
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#include "btl_ugni.h"
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#include "btl_ugni_frag.h"
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int mca_btl_ugni_start_eager_get (mca_btl_base_endpoint_t *ep,
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mca_btl_ugni_eager_ex_frag_hdr_t hdr,
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mca_btl_ugni_base_frag_t *frag);
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static inline void init_gni_post_desc (mca_btl_ugni_base_frag_t *frag,
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gni_post_type_t op_type,
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uint64_t lcl_addr,
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gni_mem_handle_t lcl_mdh,
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uint64_t rem_addr,
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gni_mem_handle_t rem_mdh,
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uint64_t bufsize,
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gni_cq_handle_t cq_hndl) {
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frag->post_desc.base.type = op_type;
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frag->post_desc.base.cq_mode = GNI_CQMODE_GLOBAL_EVENT;
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frag->post_desc.base.dlvr_mode = GNI_DLVMODE_PERFORMANCE;
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frag->post_desc.base.local_addr = (uint64_t) lcl_addr;
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frag->post_desc.base.local_mem_hndl = lcl_mdh;
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frag->post_desc.base.remote_addr = (uint64_t) rem_addr;
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frag->post_desc.base.remote_mem_hndl = rem_mdh;
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frag->post_desc.base.length = bufsize;
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frag->post_desc.base.rdma_mode = 0;
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frag->post_desc.base.src_cq_hndl = cq_hndl;
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frag->post_desc.tries = 0;
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}
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static inline int mca_btl_ugni_post_fma (mca_btl_ugni_base_frag_t *frag, gni_post_type_t op_type,
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mca_btl_ugni_segment_t *lcl_seg, mca_btl_ugni_segment_t *rem_seg)
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{
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gni_return_t rc;
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/* Post descriptor (CQ is ignored for FMA transactions) */
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init_gni_post_desc (frag, op_type, lcl_seg->base.seg_addr.lval, lcl_seg->memory_handle,
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rem_seg->base.seg_addr.lval, rem_seg->memory_handle, lcl_seg->base.seg_len, 0);
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rc = GNI_PostFma (frag->endpoint->rdma_ep_handle, &frag->post_desc.base);
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if (GNI_RC_SUCCESS != rc) {
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BTL_VERBOSE(("GNI_PostFma failed with gni rc: %d", rc));
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return OPAL_ERR_OUT_OF_RESOURCE;
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}
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return OPAL_SUCCESS;
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}
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static inline int mca_btl_ugni_post_bte (mca_btl_ugni_base_frag_t *frag, gni_post_type_t op_type,
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mca_btl_ugni_segment_t *lcl_seg, mca_btl_ugni_segment_t *rem_seg)
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{
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gni_return_t rc;
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/* Post descriptor */
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init_gni_post_desc (frag, op_type, lcl_seg->base.seg_addr.lval, lcl_seg->memory_handle,
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rem_seg->base.seg_addr.lval, rem_seg->memory_handle, lcl_seg->base.seg_len,
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frag->endpoint->btl->rdma_local_cq);
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rc = GNI_PostRdma (frag->endpoint->rdma_ep_handle, &frag->post_desc.base);
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if (GNI_RC_SUCCESS != rc) {
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BTL_VERBOSE(("GNI_PostRdma failed with gni rc: %d", rc));
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return OPAL_ERR_OUT_OF_RESOURCE;
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}
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return OPAL_SUCCESS;
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}
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static inline int mca_btl_ugni_post_wcb (mca_btl_ugni_base_frag_t *frag, bool get, mca_btl_ugni_segment_t *lcl_seg,
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mca_btl_ugni_segment_t *rem_seg, frag_cb_t cb) {
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frag->cbfunc = cb;
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if (frag->base.des_local->seg_len <= mca_btl_ugni_component.ugni_fma_limit) {
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return mca_btl_ugni_post_fma (frag, get ? GNI_POST_FMA_GET : GNI_POST_FMA_PUT, lcl_seg, rem_seg);
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}
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return mca_btl_ugni_post_bte (frag, get ? GNI_POST_RDMA_GET : GNI_POST_RDMA_PUT, lcl_seg, rem_seg);
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}
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static inline int mca_btl_ugni_post (mca_btl_ugni_base_frag_t *frag, bool get, mca_btl_ugni_segment_t *lcl_seg,
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mca_btl_ugni_segment_t *rem_seg) {
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return mca_btl_ugni_post_wcb (frag, get, lcl_seg, rem_seg, mca_btl_ugni_frag_complete);
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}
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static inline void mca_btl_ugni_repost (mca_btl_ugni_base_frag_t *frag, int rc) {
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gni_return_t grc;
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frag->cbfunc = mca_btl_ugni_frag_complete;
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if (GNI_POST_RDMA_PUT == frag->post_desc.base.type ||
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GNI_POST_RDMA_GET == frag->post_desc.base.type) {
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grc = GNI_PostRdma (frag->endpoint->rdma_ep_handle, &frag->post_desc.base);
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} else {
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grc = GNI_PostFma (frag->endpoint->rdma_ep_handle, &frag->post_desc.base);
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}
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if (OPAL_UNLIKELY(GNI_RC_SUCCESS != grc)) {
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frag->cbfunc = mca_btl_ugni_repost;
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opal_list_append (&frag->endpoint->btl->failed_frags, (opal_list_item_t *) frag);
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}
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}
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#endif /* MCA_BTL_UGNI_RDMA_H */
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