b0a84b0a7d
Uses new CUDA IPC support. Also, a few minor changes in PML to take advantage of it. This code has no effect unless user asks for it explicitly via configure arguments. Otherwise, it is either #ifdef'ed out or not compiled. This commit was SVN r26039.
835 строки
32 KiB
C
835 строки
32 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; -*- */
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/*
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* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2008 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2006-2007 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2012 NVIDIA Corporation. 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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/**
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* @file
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*
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* Byte Transfer Layer (BTL)
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*
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*
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* BTL Initialization:
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*
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* During library initialization, all available BTL components are
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* loaded and opened via their mca_base_open_component_fn_t
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* function. The BTL open function should register any mca parameters
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* used to tune/adjust the behaviour of the BTL (mca_base_param_register_int(),
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* mca_base_param_register_string()). Note that the open function may fail
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* if the resources (e.g. shared libraries, etc) required by the network
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* transport are not available.
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*
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* The mca_btl_base_component_init_fn_t() is then called for each of the
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* components that are succesfully opened. The component init function may
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* return either:
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*
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* (1) a NULL list of BTL modules if the transport is not available,
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* (2) a list containing a one or more single BTL modules, where the BTL provides
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* a layer of abstraction over one or more physical devices (e.g. NICs),
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*
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* During module initialization, the module should post any addressing
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* information required by its peers. An example would be the TCP
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* listen port opened by the TCP module for incoming connection
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* requests. This information is published to peers via the
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* ompi_modex_send() interface. Note that peer information is not
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* guaranteed to be available via ompi_modex_recv() during the
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* module's init function. However, it will be available during
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* BTL selection (mca_btl_base_add_proc_fn_t()).
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*
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* BTL Selection:
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*
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* The upper layer builds an ordered list of the available BTL modules sorted
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* by their exclusivity ranking. This is a relative ranking that is used
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* to determine the set of BTLs that may be used to reach a given destination.
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* During startup the BTL modules are queried via their
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* mca_btl_base_add_proc_fn_t() to determine if they are able to reach
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* a given destination. The BTL module with the highest ranking that
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* returns success is selected. Subsequent BTL modules are selected only
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* if they have the same exclusivity ranking.
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*
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* An example of how this might be used:
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*
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* BTL Exclusivity Comments
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* -------- ----------- ------------------
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* LO 100 Selected exclusively for local process
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* SM 50 Selected exclusively for other processes on host
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* IB 0 Selected based on network reachability
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* IB 0 Selected based on network reachability
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* TCP 0 Selected based on network reachability
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* TCP 0 Selected based on network reachability
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*
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* When mca_btl_base_add_proc_fn_t() is called on a BTL module, the BTL
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* will populate an OUT variable with mca_btl_base_endpoint_t pointers.
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* Each pointer is treated as an opaque handle by the upper layer and is
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* returned to the BTL on subsequent data transfer calls to the
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* corresponding destination process. The actual contents of the
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* data structure are defined on a per BTL basis, and may be used to
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* cache addressing or connection information, such as a TCP socket
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* or IB queue pair.
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*
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* Progress:
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*
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* By default, the library provides for polling based progress of outstanding
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* requests. The BTL component exports an interface function (btl_progress)
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* that is called in a polling mode by the PML during calls into the MPI
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* library. Note that the btl_progress() function is called on the BTL component
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* rather than each BTL module. This implies that the BTL author is responsible
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* for iterating over the pending operations in each of the BTL modules associated
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* with the component.
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*
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* On platforms where threading support is provided, the library provides the
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* option of building with asynchronous threaded progress. In this case, the BTL
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* author is responsible for providing a thread to progress pending operations.
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* A thread is associated with the BTL component/module such that transport specific
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* functionality/APIs may be used to block the thread until a pending operation
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* completes. This thread MUST NOT poll for completion as this would oversubscribe
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* the CPU.
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*
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* Note that in the threaded case the PML may choose to use a hybrid approach,
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* such that polling is implemented from the user thread for a fixed number of
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* cycles before relying on the background thread(s) to complete requests. If
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* possible the BTL should support the use of both modes concurrently.
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*
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*/
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#ifndef MCA_BTL_H
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#define MCA_BTL_H
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#include "ompi_config.h"
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#include "opal/mca/mca.h"
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#include "opal/class/opal_bitmap.h"
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#include "opal/datatype/opal_convertor.h"
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#include "opal/prefetch.h" /* For OPAL_LIKELY */
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#include "ompi/mca/mpool/mpool.h"
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#include "ompi/types.h"
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#include "opal/types.h"
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#include "opal/mca/crs/crs.h"
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#include "opal/mca/crs/base/base.h"
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BEGIN_C_DECLS
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/*
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* BTL types
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*/
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struct mca_btl_base_module_t;
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struct mca_btl_base_endpoint_t;
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struct mca_btl_base_descriptor_t;
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struct mca_mpool_base_resources_t;
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struct ompi_proc_t;
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/* send/recv operations require tag matching */
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typedef uint8_t mca_btl_base_tag_t;
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#define MCA_BTL_NO_ORDER 255
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/*
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* Communication specific defines. There are a number of active message ID
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* that can be shred between all frameworks that need to communicate (i.e.
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* use the PML or the BTL directly). These ID are exchanged between the
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* processes, therefore they need to be identical everywhere. The simplest
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* approach is to have them defined as constants, and give each framework a
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* small number. Here is the rule that defines these ID (they are 8 bits):
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* - the first 3 bits are used to code the framework (i.e. PML, OSC, COLL)
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* - the remaining 5 bytes are used internally by the framework, and divided
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* based on the components requirements. Therefore, the way the PML and
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* the OSC frameworks use these defines will be different. For more
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* information about how these framework ID are defined, take a look in the
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* header file associated with the framework.
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*/
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#define MCA_BTL_AM_FRAMEWORK_MASK 0xD0
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#define MCA_BTL_TAG_BTL 0x20
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#define MCA_BTL_TAG_PML 0x40
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#define MCA_BTL_TAG_OSC_RDMA 0x60
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#define MCA_BTL_TAG_USR 0x80
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#define MCA_BTL_TAG_MAX 255 /* 1 + highest allowed tag num */
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/*
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* Reserved tags for specific BTLs. As multiple BTLs can be active
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* simultaneously, their tags should not collide.
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*/
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#define MCA_BTL_TAG_IB (MCA_BTL_TAG_BTL + 0)
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#define MCA_BTL_TAG_UDAPL (MCA_BTL_TAG_BTL + 1)
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/* prefered protocol */
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#define MCA_BTL_FLAGS_SEND 0x0001
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#define MCA_BTL_FLAGS_PUT 0x0002
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#define MCA_BTL_FLAGS_GET 0x0004
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#define MCA_BTL_FLAGS_RDMA (MCA_BTL_FLAGS_GET|MCA_BTL_FLAGS_PUT)
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/* btl can send directly from user buffer w/out registration */
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#define MCA_BTL_FLAGS_SEND_INPLACE 0x0008
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/* btl transport reliability flags - currently used only by the DR PML */
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#define MCA_BTL_FLAGS_NEED_ACK 0x0010
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#define MCA_BTL_FLAGS_NEED_CSUM 0x0020
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/** RDMA put/get calls must have a matching prepare_{src,dst} call
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on the target with the same base (and possibly bound). */
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#define MCA_BTL_FLAGS_RDMA_MATCHED 0x0040
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/* btl needs local rdma completion */
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#define MCA_BTL_FLAGS_RDMA_COMPLETION 0x0080
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/* btl can do heterogeneous rdma operations on byte buffers */
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#define MCA_BTL_FLAGS_HETEROGENEOUS_RDMA 0x0100
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/* btl can support failover if enabled */
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#define MCA_BTL_FLAGS_FAILOVER_SUPPORT 0x0200
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#define MCA_BTL_FLAGS_CUDA_PUT 0x0400
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#define MCA_BTL_FLAGS_CUDA_GET 0x0800
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#define MCA_BTL_FLAGS_CUDA_RDMA (MCA_BTL_FLAGS_CUDA_GET|MCA_BTL_FLAGS_CUDA_PUT)
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/* Default exclusivity levels */
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#define MCA_BTL_EXCLUSIVITY_HIGH (64*1024) /* internal loopback */
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#define MCA_BTL_EXCLUSIVITY_DEFAULT 1024 /* GM/IB/etc. */
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#define MCA_BTL_EXCLUSIVITY_LOW 0 /* TCP used as a last resort */
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/* error callback flags */
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#define MCA_BTL_ERROR_FLAGS_FATAL 0x1
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#define MCA_BTL_ERROR_FLAGS_NONFATAL 0x2
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/**
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* Asynchronous callback function on completion of an operation.
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* Completion Semantics: The descriptor can be reused or returned to the
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* BTL via mca_btl_base_module_free_fn_t. The operation has been queued to
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* the network device or will otherwise make asynchronous progress without
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* subsequent calls to btl_progress.
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*
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* @param[IN] module the BTL module
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* @param[IN] endpoint the BTL endpoint
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* @param[IN] descriptor the BTL descriptor
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*
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*/
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typedef void (*mca_btl_base_completion_fn_t)(
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struct mca_btl_base_module_t* module,
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struct mca_btl_base_endpoint_t* endpoint,
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struct mca_btl_base_descriptor_t* descriptor,
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int status);
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/**
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* Describes a region/segment of memory that is addressable
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* by an BTL.
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*/
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struct mca_btl_base_segment_t {
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/** Address of the memory */
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ompi_ptr_t seg_addr;
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/** Length in bytes */
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uint32_t seg_len;
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#if OPAL_ENABLE_HETEROGENEOUS_SUPPORT
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/** Heterogeneous padding */
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uint8_t seg_padding[4];
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#endif
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/** Memory segment key required by some RDMA networks */
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union {
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uint32_t key32[4];
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uint64_t key64[2];
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uint8_t key8[16];
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#if OMPI_CUDA_SUPPORT
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uint8_t cudakey[128]; /* 64 bytes for CUDA mem handle, 64 bytes for CUDA event handle */
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#endif /* OMPI_CUDA_SUPPORT */
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} seg_key;
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#if OMPI_CUDA_SUPPORT
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/** Address of the entire memory handle */
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ompi_ptr_t memh_seg_addr;
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/** Length in bytes of entire memory handle */
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uint32_t memh_seg_len;
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#endif /* OMPI_CUDA_SUPPORT */
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};
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typedef struct mca_btl_base_segment_t mca_btl_base_segment_t;
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/**
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* A descriptor that holds the parameters to a send/put/get
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* operation along w/ a callback routine that is called on
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* completion of the request.
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* Note: from the initiator of a PUT operation des_src is the local memory
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* and des_dst is the remote memory
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* from the initiator of a GET operations des_dst is the local memory
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* and des_src is the remote memory
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* from the initiator of a SEND operation des_src is the local memory
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* and des_dst is not used
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*/
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struct mca_btl_base_descriptor_t {
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ompi_free_list_item_t super;
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mca_btl_base_segment_t *des_src; /**< source segments */
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size_t des_src_cnt; /**< number of source segments */
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mca_btl_base_segment_t *des_dst; /**< destination segments */
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size_t des_dst_cnt; /**< number of destination segments */
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mca_btl_base_completion_fn_t des_cbfunc; /**< local callback function */
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void* des_cbdata; /**< opaque callback data */
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void* des_context; /**< more opaque callback data */
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uint32_t des_flags; /**< hints to BTL */
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/** order value, this is only
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valid in the local completion callback
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and may be used in subsequent calls to
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btl_alloc, btl_prepare_src/dst to request
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a descriptor that will be ordered w.r.t.
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this descriptor
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*/
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uint8_t order;
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};
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typedef struct mca_btl_base_descriptor_t mca_btl_base_descriptor_t;
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OMPI_DECLSPEC OBJ_CLASS_DECLARATION(mca_btl_base_descriptor_t);
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#define MCA_BTL_DES_FLAGS_PRIORITY 0x0001
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/* Allow the BTL to dispose the descriptor once the callback
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* associated was triggered.
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*/
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#define MCA_BTL_DES_FLAGS_BTL_OWNERSHIP 0x0002
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/* Allow the BTL to avoid calling the descriptor callback
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* if the send succeded in the btl_send (i.e in the fast path).
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*/
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#define MCA_BTL_DES_SEND_ALWAYS_CALLBACK 0x0004
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/* Type of transfer that will be done with this frag.
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*/
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#define MCA_BTL_DES_FLAGS_PUT 0x0010
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#define MCA_BTL_DES_FLAGS_GET 0x0020
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/**
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* Maximum number of allowed segments in src/dst fields of a descriptor.
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*/
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#define MCA_BTL_DES_MAX_SEGMENTS 16
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/*
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* BTL base header, stores the tag at a minimum
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*/
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struct mca_btl_base_header_t{
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mca_btl_base_tag_t tag;
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};
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typedef struct mca_btl_base_header_t mca_btl_base_header_t;
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#define MCA_BTL_BASE_HEADER_HTON(hdr)
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#define MCA_BTL_BASE_HEADER_NTOH(hdr)
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/*
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* BTL component interface functions and datatype.
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*/
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/**
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* MCA->BTL Initializes the BTL component and creates specific BTL
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* module(s).
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*
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* @param num_btls (OUT) Returns the number of btl modules created, or 0
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* if the transport is not available.
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*
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* @param enable_progress_threads (IN) Whether this component is
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* allowed to run a hidden/progress thread or not.
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*
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* @param enable_mpi_threads (IN) Whether support for multiple MPI
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* threads is enabled or not (i.e., MPI_THREAD_MULTIPLE), which
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* indicates whether multiple threads may invoke this component
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* simultaneously or not.
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*
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* @return Array of pointers to BTL modules, or NULL if the transport
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* is not available.
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*
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* During component initialization, the BTL component should discover
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* the physical devices that are available for the given transport,
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* and create a BTL module to represent each device. Any addressing
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* information required by peers to reach the device should be published
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* during this function via the ompi_modex_send() interface.
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*
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*/
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typedef struct mca_btl_base_module_t** (*mca_btl_base_component_init_fn_t)(
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int *num_btls,
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bool enable_progress_threads,
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bool enable_mpi_threads
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);
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/**
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* MCA->BTL Called to progress outstanding requests for
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* non-threaded polling environments.
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*
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* @return Count of "completions", a metric of
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* how many items where completed in the call
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* to progress.
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*/
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typedef int (*mca_btl_base_component_progress_fn_t)(void);
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/**
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* Callback function that is called asynchronously on receipt
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* of data by the transport layer.
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* Note that the the mca_btl_base_descriptor_t is only valid within the
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* completion function, this implies that all data payload in the
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* mca_btl_base_descriptor_t must be copied out within this callback or
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* forfeited back to the BTL.
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*
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* @param[IN] btl BTL module
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* @param[IN] tag The active message receive callback tag value
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* @param[IN] descriptor The BTL descriptor (contains the receive payload)
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* @param[IN] cbdata Opaque callback data
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*/
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typedef void (*mca_btl_base_module_recv_cb_fn_t)(
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struct mca_btl_base_module_t* btl,
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mca_btl_base_tag_t tag,
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mca_btl_base_descriptor_t* descriptor,
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void* cbdata
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);
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typedef struct mca_btl_active_message_callback_t {
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mca_btl_base_module_recv_cb_fn_t cbfunc;
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void* cbdata;
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} mca_btl_active_message_callback_t;
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OMPI_DECLSPEC extern
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mca_btl_active_message_callback_t mca_btl_base_active_message_trigger[MCA_BTL_TAG_MAX];
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/**
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* BTL component descriptor. Contains component version information
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* and component open/close/init functions.
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*/
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struct mca_btl_base_component_2_0_0_t {
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mca_base_component_t btl_version;
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mca_base_component_data_t btl_data;
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mca_btl_base_component_init_fn_t btl_init;
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mca_btl_base_component_progress_fn_t btl_progress;
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};
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typedef struct mca_btl_base_component_2_0_0_t mca_btl_base_component_2_0_0_t;
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typedef struct mca_btl_base_component_2_0_0_t mca_btl_base_component_t;
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/* add the 1_0_0_t typedef for source compatibility
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* we can do this safely because 1_0_0 components are the same as
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* 1_0_1 components, the difference is in the btl module.
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* Fortunately the only difference in the module is an additional interface
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* function added to 1_0_1. We can therefore safely treat an older module just
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* just like the new one so long as we check the component version
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* prior to invoking the new interface function.
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*/
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typedef struct mca_btl_base_component_2_0_0_t mca_btl_base_component_1_0_1_t;
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typedef struct mca_btl_base_component_2_0_0_t mca_btl_base_component_1_0_0_t;
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/*
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* BTL module interface functions and datatype.
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*/
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/**
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* MCA->BTL Clean up any resources held by BTL module
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* before the module is unloaded.
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*
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* @param btl (IN) BTL module.
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* @return OMPI_SUCCESS or error status on failure.
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*
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* Prior to unloading a BTL module, the MCA framework will call
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* the BTL finalize method of the module. Any resources held by
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* the BTL should be released and if required the memory corresponding
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* to the BTL module freed.
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*
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*/
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typedef int (*mca_btl_base_module_finalize_fn_t)(
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struct mca_btl_base_module_t* btl
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);
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/**
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* BML->BTL notification of change in the process list.
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*
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|
* @param btl (IN) BTL module
|
|
* @param nprocs (IN) Number of processes
|
|
* @param procs (IN) Array of processes
|
|
* @param endpoint (OUT) Array of mca_btl_base_endpoint_t structures by BTL.
|
|
* @param reachable (OUT) Bitmask indicating set of peer processes that are reachable by this BTL.
|
|
* @return OMPI_SUCCESS or error status on failure.
|
|
*
|
|
* The mca_btl_base_module_add_procs_fn_t() is called by the BML to
|
|
* determine the set of BTLs that should be used to reach each process.
|
|
* Any addressing information exported by the peer via the ompi_modex_send()
|
|
* function should be available during this call via the corresponding
|
|
* ompi_modex_recv() function. The BTL may utilize this information to
|
|
* determine reachability of each peer process.
|
|
*
|
|
* For each process that is reachable by the BTL, the bit corresponding to the index
|
|
* into the proc array (nprocs) should be set in the reachable bitmask. The BTL
|
|
* will return an array of pointers to a data structure defined
|
|
* by the BTL that is then returned to the BTL on subsequent calls to the BTL data
|
|
* transfer functions (e.g btl_send). This may be used by the BTL to cache any addressing
|
|
* or connection information (e.g. TCP socket, IB queue pair).
|
|
*/
|
|
typedef int (*mca_btl_base_module_add_procs_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
size_t nprocs,
|
|
struct ompi_proc_t** procs,
|
|
struct mca_btl_base_endpoint_t** endpoints,
|
|
struct opal_bitmap_t* reachable
|
|
);
|
|
|
|
/**
|
|
* Notification of change to the process list.
|
|
*
|
|
* @param btl (IN) BTL module
|
|
* @param nprocs (IN) Number of processes
|
|
* @param proc (IN) Set of processes
|
|
* @param peer (IN) Set of peer addressing information.
|
|
* @return Status indicating if cleanup was successful
|
|
*
|
|
* When the process list changes, the BML notifies the BTL of the
|
|
* change, to provide the opportunity to cleanup or release any
|
|
* resources associated with the peer.
|
|
*/
|
|
typedef int (*mca_btl_base_module_del_procs_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
size_t nprocs,
|
|
struct ompi_proc_t** procs,
|
|
struct mca_btl_base_endpoint_t** peer
|
|
);
|
|
|
|
/**
|
|
* Register a callback function that is called on receipt
|
|
* of a fragment.
|
|
*
|
|
* @param[IN] btl BTL module
|
|
* @param[IN] tag tag value of this callback
|
|
* (specified on subsequent send operations)
|
|
* @param[IN] cbfunc The callback function
|
|
* @param[IN] cbdata Opaque callback data
|
|
*
|
|
* @return OMPI_SUCCESS The callback was registered successfully
|
|
* @return OMPI_ERROR The callback was NOT registered successfully
|
|
*
|
|
*/
|
|
typedef int (*mca_btl_base_module_register_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
mca_btl_base_tag_t tag,
|
|
mca_btl_base_module_recv_cb_fn_t cbfunc,
|
|
void* cbdata
|
|
);
|
|
|
|
|
|
/**
|
|
* Callback function that is called asynchronously on receipt
|
|
* of an error from the transport layer
|
|
*
|
|
* @param[IN] btl BTL module
|
|
* @param[IN] flags type of error
|
|
* @param[IN] errproc process that had an error
|
|
* @param[IN] btlinfo descriptive string from the BTL
|
|
*/
|
|
|
|
typedef void (*mca_btl_base_module_error_cb_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
int32_t flags,
|
|
struct ompi_proc_t* errproc,
|
|
char* btlinfo
|
|
);
|
|
|
|
|
|
/**
|
|
* Register a callback function that is called on receipt
|
|
* of an error.
|
|
*
|
|
* @param[IN] btl BTL module
|
|
* @param[IN] cbfunc The callback function
|
|
*
|
|
* @return OMPI_SUCCESS The callback was registered successfully
|
|
* @return OMPI_ERROR The callback was NOT registered successfully
|
|
*
|
|
*/
|
|
typedef int (*mca_btl_base_module_register_error_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
mca_btl_base_module_error_cb_fn_t cbfunc
|
|
);
|
|
|
|
|
|
/**
|
|
* Allocate a descriptor with a segment of the requested size.
|
|
* Note that the BTL layer may choose to return a smaller size
|
|
* if it cannot support the request. The order tag value ensures that
|
|
* operations on the descriptor that is allocated will be
|
|
* ordered w.r.t. a previous operation on a particular descriptor.
|
|
* Ordering is only guaranteed if the previous descriptor had its
|
|
* local completion callback function called and the order tag of
|
|
* that descriptor is only valid upon the local completion callback function.
|
|
*
|
|
*
|
|
* @param btl (IN) BTL module
|
|
* @param size (IN) Request segment size.
|
|
* @param order (IN) The ordering tag (may be MCA_BTL_NO_ORDER)
|
|
*/
|
|
|
|
typedef mca_btl_base_descriptor_t* (*mca_btl_base_module_alloc_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
struct mca_btl_base_endpoint_t* endpoint,
|
|
uint8_t order,
|
|
size_t size,
|
|
uint32_t flags
|
|
);
|
|
|
|
/**
|
|
* Return a descriptor allocated from this BTL via alloc/prepare.
|
|
* A descriptor can only be deallocated after its local completion
|
|
* callback function has called for all send/put/get operations.
|
|
*
|
|
* @param btl (IN) BTL module
|
|
* @param segment (IN) Descriptor allocated from the BTL
|
|
*/
|
|
typedef int (*mca_btl_base_module_free_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
mca_btl_base_descriptor_t* descriptor
|
|
);
|
|
|
|
|
|
/**
|
|
* Prepare a descriptor for send/put/get using the supplied
|
|
* convertor. If the convertor references data that is contiguous,
|
|
* the descriptor may simply point to the user buffer. Otherwise,
|
|
* this routine is responsible for allocating buffer space and
|
|
* packing if required.
|
|
*
|
|
* The descriptor returned can be used in multiple concurrent operations
|
|
* (send/put/get) unless the BTL has the MCA_BTL_FLAGS_RDMA_MATCHED flag set
|
|
* in which case a corresponding prepare call must accompany the put/get call
|
|
* in addition, the address and length that is put/get must match the address
|
|
* and length which is prepared.
|
|
*
|
|
* The order tag value ensures that operations on the
|
|
* descriptor that is prepared will be ordered w.r.t. a previous
|
|
* operation on a particular descriptor. Ordering is only guaranteed if
|
|
* the previous descriptor had its local completion callback function
|
|
* called and the order tag of that descriptor is only valid upon the local
|
|
* completion callback function.
|
|
*
|
|
* @param btl (IN) BTL module
|
|
* @param endpoint (IN) BTL peer addressing
|
|
* @param registration (IN) Memory registration
|
|
* @param convertor (IN) Data type convertor
|
|
* @param order (IN) The ordering tag (may be MCA_BTL_NO_ORDER)
|
|
* @param reserve (IN) Additional bytes requested by upper layer to precede user data
|
|
* @param size (IN/OUT) Number of bytes to prepare (IN),
|
|
* number of bytes actually prepared (OUT)
|
|
*
|
|
*/
|
|
typedef struct mca_btl_base_descriptor_t* (*mca_btl_base_module_prepare_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
struct mca_btl_base_endpoint_t* endpoint,
|
|
mca_mpool_base_registration_t* registration,
|
|
struct opal_convertor_t* convertor,
|
|
uint8_t order,
|
|
size_t reserve,
|
|
size_t* size,
|
|
uint32_t flags
|
|
);
|
|
|
|
/**
|
|
* Initiate an asynchronous send.
|
|
* Completion Semantics: the descriptor has been queued for a send operation
|
|
* the BTL now controls the descriptor until local
|
|
* completion callback is made on the descriptor
|
|
*
|
|
* All BTLs allow multiple concurrent asynchronous send operations on a descriptor
|
|
*
|
|
* @param btl (IN) BTL module
|
|
* @param endpoint (IN) BTL addressing information
|
|
* @param descriptor (IN) Description of the data to be transfered
|
|
* @param tag (IN) The tag value used to notify the peer.
|
|
*
|
|
* @retval OMPI_SUCCESS The descriptor was successfully queued for a send
|
|
* @retval OMPI_ERROR The descriptor was NOT successfully queued for a send
|
|
* @retval OMPI_ERR_UNREACH The endpoint is not reachable
|
|
*/
|
|
typedef int (*mca_btl_base_module_send_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
struct mca_btl_base_endpoint_t* endpoint,
|
|
struct mca_btl_base_descriptor_t* descriptor,
|
|
mca_btl_base_tag_t tag
|
|
);
|
|
|
|
/**
|
|
* Initiate an immediate blocking send.
|
|
* Completion Semantics: the BTL will make a best effort
|
|
* to send the header and "size" bytes from the datatype using the convertor.
|
|
* The header is guaranteed to be delivered entirely in the first segment.
|
|
* Should the BTL be unable to deliver the data due to resource constraints
|
|
* the BTL will return a descriptor (via the OUT param)
|
|
* of size "payload_size + header_size".
|
|
*
|
|
* @param btl (IN) BTL module
|
|
* @param endpoint (IN) BTL addressing information
|
|
* @param convertor (IN) Data type convertor
|
|
* @param header (IN) Pointer to header.
|
|
* @param header_size (IN) Size of header.
|
|
* @param payload_size (IN) Size of payload (from convertor).
|
|
* @param order (IN) The ordering tag (may be MCA_BTL_NO_ORDER)
|
|
* @param flags (IN) Flags.
|
|
* @param tag (IN) The tag value used to notify the peer.
|
|
* @param descriptor (OUT) The descriptor to be returned unable to be sent immediately
|
|
|
|
* @retval OMPI_SUCCESS The send was successfully queued
|
|
* @retval OMPI_ERROR The send failed
|
|
* @retval OMPI_ERR_UNREACH The endpoint is not reachable
|
|
* @retval OMPI_ERR_RESOURCE_BUSY The BTL is busy a descriptor will be returned
|
|
* (via the OUT param) if descriptors are available
|
|
|
|
*/
|
|
|
|
typedef int (*mca_btl_base_module_sendi_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
struct mca_btl_base_endpoint_t* endpoint,
|
|
struct opal_convertor_t* convertor,
|
|
void* header,
|
|
size_t header_size,
|
|
size_t payload_size,
|
|
uint8_t order,
|
|
uint32_t flags,
|
|
mca_btl_base_tag_t tag,
|
|
mca_btl_base_descriptor_t** descriptor
|
|
);
|
|
|
|
/**
|
|
* Initiate an asynchronous put.
|
|
* Completion Semantics: the descriptor has been queued for a put operation
|
|
* the BTL now controls the descriptor until local
|
|
* completion callback is made on the descriptor
|
|
*
|
|
* BTLs that do not have the MCA_BTL_FLAGS_RDMA_MATCHED flag set
|
|
* allow multiple concurrent put operations on the same descriptor.
|
|
* BTLs that do have the MCA_BTL_FLAGS_RDMA_MATCHED flag set require
|
|
* a corresponding prepare_src/dst call for each put operation and
|
|
* therefore prohibit multiple concurrent put operations.
|
|
*
|
|
* @param btl (IN) BTL module
|
|
* @param endpoint (IN) BTL addressing information
|
|
* @param descriptor (IN) Description of the data to be transferred
|
|
*
|
|
* @retval OMPI_SUCCESS The descriptor was successfully queued for a put
|
|
* @retval OMPI_ERROR The descriptor was NOT successfully queued for a put
|
|
*/
|
|
|
|
typedef int (*mca_btl_base_module_put_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
struct mca_btl_base_endpoint_t* endpoint,
|
|
struct mca_btl_base_descriptor_t* descriptor
|
|
);
|
|
|
|
/**
|
|
* Initiate an asynchronous get.
|
|
*
|
|
* Completion Semantics: the descriptor has been queued for a get operation
|
|
* the BTL now controls the descriptor until local
|
|
* completion callback is made on the descriptor
|
|
*
|
|
* BTLs that do not have the MCA_BTL_FLAGS_RDMA_MATCHED flag set
|
|
* allow multiple concurrent get operations on the same descriptor.
|
|
* BTLs that do have the MCA_BTL_FLAGS_RDMA_MATCHED flag set require
|
|
* a corresponding prepare_src/dst call for each get operation and
|
|
* therefore prohibit multiple concurrent get operations.
|
|
*
|
|
* @param btl (IN) BTL module
|
|
* @param endpoint (IN) BTL addressing information
|
|
* @param descriptor (IN) Description of the data to be transferred
|
|
*
|
|
* @retval OMPI_SUCCESS The descriptor was successfully queued for a get
|
|
* @retval OMPI_ERROR The descriptor was NOT successfully queued for a get
|
|
*
|
|
*/
|
|
|
|
typedef int (*mca_btl_base_module_get_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
struct mca_btl_base_endpoint_t* endpoint,
|
|
struct mca_btl_base_descriptor_t* descriptor
|
|
);
|
|
|
|
|
|
/**
|
|
* Diagnostic dump of btl state.
|
|
*
|
|
* @param btl (IN) BTL module
|
|
* @param endpoint (IN) BTL endpoint
|
|
* @param verbose (IN) Verbosity level
|
|
*/
|
|
|
|
typedef void (*mca_btl_base_module_dump_fn_t)(
|
|
struct mca_btl_base_module_t* btl,
|
|
struct mca_btl_base_endpoint_t* endpoint,
|
|
int verbose
|
|
);
|
|
|
|
/**
|
|
* Fault Tolerance Event Notification Function
|
|
* @param state Checkpoint Status
|
|
* @return OMPI_SUCCESS or failure status
|
|
*/
|
|
typedef int (*mca_btl_base_module_ft_event_fn_t)(int state);
|
|
|
|
/**
|
|
* BTL module interface functions and attributes.
|
|
*/
|
|
struct mca_btl_base_module_t {
|
|
|
|
/* BTL common attributes */
|
|
mca_btl_base_component_t* btl_component; /**< pointer back to the BTL component structure */
|
|
size_t btl_eager_limit; /**< maximum size of first fragment -- eager send */
|
|
size_t btl_rndv_eager_limit; /**< the size of a data sent in a first fragment of rendezvous protocol */
|
|
size_t btl_max_send_size; /**< maximum send fragment size supported by the BTL */
|
|
size_t btl_rdma_pipeline_send_length; /**< amount of bytes that should be send by pipeline protocol */
|
|
size_t btl_rdma_pipeline_frag_size; /**< maximum rdma fragment size supported by the BTL */
|
|
size_t btl_min_rdma_pipeline_size; /**< minimum packet size for pipeline protocol */
|
|
uint32_t btl_exclusivity; /**< indicates this BTL should be used exclusively */
|
|
uint32_t btl_latency; /**< relative ranking of latency used to prioritize btls */
|
|
uint32_t btl_bandwidth; /**< bandwidth (Mbytes/sec) supported by each endpoint */
|
|
uint32_t btl_flags; /**< flags (put/get...) */
|
|
|
|
/* BTL function table */
|
|
mca_btl_base_module_add_procs_fn_t btl_add_procs;
|
|
mca_btl_base_module_del_procs_fn_t btl_del_procs;
|
|
mca_btl_base_module_register_fn_t btl_register;
|
|
mca_btl_base_module_finalize_fn_t btl_finalize;
|
|
|
|
mca_btl_base_module_alloc_fn_t btl_alloc;
|
|
mca_btl_base_module_free_fn_t btl_free;
|
|
mca_btl_base_module_prepare_fn_t btl_prepare_src;
|
|
mca_btl_base_module_prepare_fn_t btl_prepare_dst;
|
|
mca_btl_base_module_send_fn_t btl_send;
|
|
mca_btl_base_module_sendi_fn_t btl_sendi;
|
|
mca_btl_base_module_put_fn_t btl_put;
|
|
mca_btl_base_module_get_fn_t btl_get;
|
|
mca_btl_base_module_dump_fn_t btl_dump;
|
|
|
|
/** the mpool associated with this btl (optional) */
|
|
mca_mpool_base_module_t* btl_mpool;
|
|
/** register a default error handler */
|
|
mca_btl_base_module_register_error_fn_t btl_register_error;
|
|
/** fault tolerant even notification */
|
|
mca_btl_base_module_ft_event_fn_t btl_ft_event;
|
|
};
|
|
typedef struct mca_btl_base_module_t mca_btl_base_module_t;
|
|
|
|
/*
|
|
* Macro for use in modules that are of type btl v2.0.1
|
|
*/
|
|
#define MCA_BTL_BASE_VERSION_2_0_0 \
|
|
MCA_BASE_VERSION_2_0_0, \
|
|
"btl", 2, 0, 0
|
|
|
|
END_C_DECLS
|
|
|
|
#endif /* OMPI_MCA_BTL_H */
|