275 строки
8.7 KiB
C
275 строки
8.7 KiB
C
/*
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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) 2004-2006 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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* $COPYRIGHT$
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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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/** @file */
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#ifndef MCA_COLL_SM2_EXPORT_H
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#define MCA_COLL_SM2_EXPORT_H
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#include "ompi_config.h"
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#include "mpi.h"
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#include "opal/mca/mca.h"
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#include "orte/mca/ns/ns_types.h"
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#include "ompi/mca/coll/coll.h"
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#include "ompi/mca/mpool/mpool.h"
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#include "ompi/mca/common/sm/common_sm_mmap.h"
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BEGIN_C_DECLS
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#ifdef HAVE_SCHED_YIELD
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# include <sched.h>
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# define SPIN sched_yield()
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#elif defined(__WINDOWS__)
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# define SPIN SwitchToThread()
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#else /* no switch available */
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# define SPIN
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#endif
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/*
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* Memory Management
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* - All memory allocation will be done on a per-communictor basis
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* - The two banks of memory will be used
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* - Each bank of memory will have M buffers
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* - These buffers will be used in a cirucular buffer order
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* - Each buffer will be contigous in virtual memory, and will have page-aligned
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* regions belonging to each process in the communicator
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* - The memory associated with each process will have a control region, and
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* a data region.
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* - First touch will be used to enforce memory locality, and thus relies on
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* processor affinity to be set.
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* - A non-blocking collective will be issued when all buffers in a bank have
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* been used. This will be completed before this bank is re-used.
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*/
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/**
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* Structure to hold the sm coll component. First it holds the
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* base coll component, and then holds a bunch of
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* sm-coll-component-specific stuff (e.g., current MCA param
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* values).
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*/
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struct mca_coll_sm2_component_t {
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/** Base coll component */
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mca_coll_base_component_1_1_0_t super;
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/** MCA parameter: Priority of this component */
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int sm2_priority;
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/** MCA parameter: control region size (bytes), per proc */
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size_t sm2_ctl_size_per_proc;
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/** MCA parameter: control region size (bytes) actually allocated - per proc*/
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size_t sm2_ctl_size_allocated;
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/** MCA parameter: control region alignment */
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size_t sm2_ctl_alignment;
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/** MCA parameter: Max data Segment size */
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size_t sm2_max_data_seg_size;
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/** MCA parameter: Min data Segment size */
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size_t sm2_data_seg_size;
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/** MCA parameter: control data size (bytes) actually allocated - per proc*/
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size_t sm2_data_size_allocated;
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/** MCA parameter: data region alignment */
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size_t sm2_data_alignment;
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/** MCA parameter: number of memory banks */
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size_t sm2_num_mem_banks;
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/** MCA parameter: number of regions per memory bank */
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size_t sm2_num_regions_per_bank;
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};
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/**
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* Convenience typedef
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*/
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typedef struct mca_coll_sm2_component_t mca_coll_sm2_component_t;
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struct mca_coll_sm2_module_t {
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/* base structure */
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mca_coll_base_module_1_1_0_t super;
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/* Shared Memory file name */
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char *coll_sm2_file_name;
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/* size of shared memory backing file */
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size_t size_sm2_backing_file;
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/* Memory pointer to shared file */
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char *shared_memory_region;
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};
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typedef struct mca_coll_sm2_module_t mca_coll_sm2_module_t;
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OBJ_CLASS_DECLARATION(mca_coll_sm2_module_t);
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/**
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* Global component instance
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*/
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OMPI_MODULE_DECLSPEC extern mca_coll_sm2_component_t mca_coll_sm2_component;
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/*
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* coll module functions
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*/
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/* query to see if the component is available for use, and can
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* satisfy the thread and progress requirements
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*/
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int mca_coll_sm2_init_query(bool enable_progress_threads,
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bool enable_mpi_threads);
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/* query to see if the module is available for use on the given
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* communicator, and if so, what it's priority is.
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*/
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struct mca_coll_base_module_1_1_0_t *
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mca_coll_sm2_comm_query(struct ompi_communicator_t *comm, int *priority);
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/**
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* Macro to setup flag usage
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*/
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#define FLAG_SETUP(flag_num, flag, data) \
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(flag) = (mca_coll_sm_in_use_flag_t*) \
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(((char *) (data)->mcb_in_use_flags) + \
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((flag_num) * mca_coll_sm_component.sm_control_size))
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/**
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* Macro to wait for the in-use flag to become idle (used by the root)
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*/
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#define FLAG_WAIT_FOR_IDLE(flag) \
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while (0 != (flag)->mcsiuf_num_procs_using) SPIN
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/**
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* Macro to wait for a flag to indicate that it's ready for this
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* operation (used by non-root processes to know when FLAG_SET() has
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* been called)
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*/
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#define FLAG_WAIT_FOR_OP(flag, op) \
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while ((op) != flag->mcsiuf_operation_count) SPIN
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/**
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* Macro to set an in-use flag with relevant data to claim it
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*/
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#define FLAG_RETAIN(flag, num_procs, op_count) \
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(flag)->mcsiuf_num_procs_using = (num_procs); \
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(flag)->mcsiuf_operation_count = (op_count)
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/**
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* Macro to release an in-use flag from this process
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*/
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#define FLAG_RELEASE(flag) \
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opal_atomic_add(&(flag)->mcsiuf_num_procs_using, -1)
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/**
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* Macro to copy a single segment in from a user buffer to a shared
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* segment
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*/
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#define COPY_FRAGMENT_IN(convertor, index, rank, iov, max_data) \
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(iov).iov_base = \
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(index)->mcbmi_data + \
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((rank) * mca_coll_sm_component.sm_fragment_size); \
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(max_data) = (iov).iov_len = mca_coll_sm_component.sm_fragment_size; \
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ompi_convertor_pack(&(convertor), &(iov), &mca_coll_sm_iov_size, \
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&(max_data) )
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/**
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* Macro to copy a single segment out from a shared segment to a user
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* buffer
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*/
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#define COPY_FRAGMENT_OUT(convertor, src_rank, index, iov, max_data) \
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(iov).iov_base = (((char*) (index)->mcbmi_data) + \
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((src_rank) * mca_coll_sm_component.sm_fragment_size)); \
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ompi_convertor_unpack(&(convertor), &(iov), &mca_coll_sm_iov_size, \
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&(max_data) )
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/**
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* Macro to memcpy a fragment between one shared segment and another
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*/
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#define COPY_FRAGMENT_BETWEEN(src_rank, dest_rank, index, len) \
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memcpy(((index)->mcbmi_data + \
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((dest_rank) * mca_coll_sm_component.sm_fragment_size)), \
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((index)->mcbmi_data + \
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((src_rank) * \
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mca_coll_sm_component.sm_fragment_size)), \
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(len))
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/**
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* Macro to tell children that a segment is ready (normalize
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* the child's ID based on the shift used to calculate the "me" node
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* in the tree). Used in fan out opertations.
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*/
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#define PARENT_NOTIFY_CHILDREN(children, num_children, index, value) \
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do { \
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for (i = 0; i < (num_children); ++i) { \
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*((size_t*) \
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(((char*) index->mcbmi_control) + \
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(mca_coll_sm_component.sm_control_size * \
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(((children)[i]->mcstn_id + root) % size)))) = (value); \
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} \
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} while (0)
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/**
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* Macro for childen to wait for parent notification (use real rank).
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* Save the value passed and then reset it when done. Used in fan out
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* operations.
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*/
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#define CHILD_WAIT_FOR_NOTIFY(rank, index, value) \
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do { \
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uint32_t volatile *ptr = ((uint32_t*) \
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(((char*) index->mcbmi_control) + \
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((rank) * mca_coll_sm_component.sm_control_size))); \
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while (0 == *ptr) SPIN; \
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(value) = *ptr; \
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*ptr = 0; \
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} while (0)
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/**
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* Macro for children to tell parent that the data is ready in their
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* segment. Used for fan in operations.
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*/
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#define CHILD_NOTIFY_PARENT(child_rank, parent_rank, index, value) \
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((size_t volatile *) \
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(((char*) (index)->mcbmi_control) + \
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(mca_coll_sm_component.sm_control_size * \
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(parent_rank))))[(child_rank)] = (value)
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/**
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* Macro for parent to wait for a specific child to tell it that the
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* data is in the child's segment. Save the value when done. Used
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* for fan in operations.
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*/
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#define PARENT_WAIT_FOR_NOTIFY_SPECIFIC(child_rank, parent_rank, index, value) \
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do { \
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size_t volatile *ptr = ((size_t volatile *) \
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(((char*) index->mcbmi_control) + \
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(mca_coll_sm_component.sm_control_size * \
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(parent_rank)))) + child_rank; \
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while (0 == *ptr) SPIN; \
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(value) = *ptr; \
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*ptr = 0; \
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} while (0)
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END_C_DECLS
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#endif /* MCA_COLL_SM2_EXPORT_H */
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