7bab4ed269
- finally added "in use" flags -- one flag protects a set of segments
- these flags now used in bcast to protect (for example) when a
message is so long that the root loops around the segments and has
to re-use old segments -- now it knows that it has to wait until the
non-root processes have finished with that set of segments before it
can start using them
- implement allreduce as a reduce followed by a bcast (per discussion
with rich)
- removed some redundant data on various data structures
- implemented query MCA param ("coll_sm_shared_mem_used_data") that
tells you how much shared memory will be used for a given set of MCA
params (e.g., number of segments, etc.). For example:
ompi_info --mca coll_sm_info_num_procs 4 --param coll sm | \
grep shared_mem_used_data
tells you that for the default MCA param values (as of r7172), for 4
processes, sm will use 548864 bytes of shared memory for its data
transfer section
- remove a bunch of .c files from the Makefile.am that aren't
implemented yet (i.e., all they do is return ERR_NOT_IMPLEMENTED)
Now on to the big Altix to test that this stuff really works...
This commit was SVN r7205.
The following SVN revision numbers were found above:
r7172 --> open-mpi/ompi@bc72a7722b
279 строки
9.5 KiB
C
279 строки
9.5 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University.
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* All rights reserved.
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* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
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* All rights 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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/**
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* @file
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*
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* Most of the description of the data layout is in the
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* coll_sm_module.c file.
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*/
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#include "ompi_config.h"
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#include "ompi/include/constants.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/mca/coll/coll.h"
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#include "opal/util/show_help.h"
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#include "coll_sm.h"
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/*
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* Public string showing the coll ompi_sm component version number
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*/
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const char *mca_coll_sm_component_version_string =
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"Open MPI sm collective MCA component version " OMPI_VERSION;
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/*
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* Local functions
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*/
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static int sm_open(void);
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static int sm_close(void);
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/*
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* Instantiate the public struct with all of our public information
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* and pointers to our public functions in it
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*/
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mca_coll_sm_component_t mca_coll_sm_component = {
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/* First, fill in the super (mca_coll_base_component_1_0_0_t) */
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{
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/* First, the mca_component_t struct containing meta
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information about the component itself */
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{
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/* Indicate that we are a coll v1.0.0 component (which
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also implies a specific MCA version) */
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MCA_COLL_BASE_VERSION_1_0_0,
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/* Component name and version */
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"sm",
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OMPI_MAJOR_VERSION,
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OMPI_MINOR_VERSION,
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OMPI_RELEASE_VERSION,
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/* Component open and close functions */
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sm_open,
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sm_close,
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},
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/* Next the MCA v1.0.0 component meta data */
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{
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/* Whether the component is checkpointable or not */
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true
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},
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/* Initialization / querying functions */
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mca_coll_sm_init_query,
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mca_coll_sm_comm_query,
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mca_coll_sm_comm_unquery,
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},
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/* sm-component specifc information */
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/* (default) priority */
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75,
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/* (default) control size (bytes) */
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4096,
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/* (default) bootstrap filename */
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"coll-sm-bootstrap",
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/* (default) number of segments in bootstrap file */
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8,
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/* (default) mpool name to use */
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"sm",
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/* (default) number of "in use" flags for each communicator's area
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in the mpool */
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2,
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/* (default) number of segments for each communicator in the mpool
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area */
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8,
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/* (default) fragment size */
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8192,
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/* (default) degree of tree for tree-based operations (must be <=
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control unit size) */
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4,
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/* (default) number of processes in coll_sm_shared_mem_size
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information variable */
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4,
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/* default values for non-MCA parameters */
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0, /* bootstrap size -- filled in below */
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0, /* mpool data size -- filled in below */
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NULL, /* data mpool pointer */
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false, /* whether this process created the data mpool */
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NULL /* pointer to meta data about bootstrap area */
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};
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/*
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* Open the component
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*/
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static int sm_open(void)
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{
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size_t size1, size2;
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mca_base_component_t *c = &mca_coll_sm_component.super.collm_version;
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mca_coll_sm_component_t *cs = &mca_coll_sm_component;
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/* If we want to be selected (i.e., all procs on one node), then
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we should have a high priority */
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mca_base_param_reg_int(c, "priority",
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"Priority of the sm coll component",
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false, false,
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cs->sm_priority,
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&cs->sm_priority);
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mca_base_param_reg_int(c, "control_size",
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"Length of the control data -- should usually be either the length of a cache line on most SMPs, or the size of a page on machines that support direct memory affinity page placement (in bytes)",
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false, false,
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cs->sm_control_size,
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&cs->sm_control_size);
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mca_base_param_reg_string(c, "bootstrap_filename",
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"Filename (in the Open MPI session directory) of the coll sm component bootstrap rendezvous mmap file",
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false, false,
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cs->sm_bootstrap_filename,
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&cs->sm_bootstrap_filename);
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mca_base_param_reg_int(c, "bootstrap_num_segments",
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"Number of segments in the bootstrap file",
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false, false,
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cs->sm_bootstrap_num_segments,
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&cs->sm_bootstrap_num_segments);
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mca_base_param_reg_int(c, "fragment_size",
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"Fragment size (in bytes) used for passing data through shared memory (will be rounded up to the nearest control_size size)",
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false, false,
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cs->sm_fragment_size,
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&cs->sm_fragment_size);
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if (0 != (cs->sm_fragment_size % cs->sm_control_size)) {
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cs->sm_fragment_size += cs->sm_control_size -
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(cs->sm_fragment_size % cs->sm_control_size);
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}
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mca_base_param_reg_string(c, "mpool",
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"Name of the mpool component to use",
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false, false,
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cs->sm_mpool_name,
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&cs->sm_mpool_name);
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mca_base_param_reg_int(c, "comm_in_use_flags",
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"Number of \"in use\" flags, used to mark a message passing area segment as currently being used or not (must be >= 2 and <= comm_num_segments)",
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false, false,
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cs->sm_comm_num_in_use_flags,
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&cs->sm_comm_num_in_use_flags);
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if (cs->sm_comm_num_in_use_flags < 2) {
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cs->sm_comm_num_in_use_flags = 2;
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}
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mca_base_param_reg_int(c, "comm_num_segments",
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"Number of segments in each communicator's shared memory message passing area (must be >= 2, and must be a multiple of comm_in_use_flags)",
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false, false,
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cs->sm_comm_num_segments,
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&cs->sm_comm_num_segments);
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if (cs->sm_comm_num_segments < cs->sm_comm_num_in_use_flags) {
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cs->sm_comm_num_segments = cs->sm_comm_num_in_use_flags;
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}
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if (0 != (cs->sm_comm_num_segments % cs->sm_comm_num_in_use_flags)) {
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cs->sm_comm_num_segments += cs->sm_comm_num_in_use_flags -
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(cs->sm_comm_num_segments % cs->sm_comm_num_in_use_flags);
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}
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mca_base_param_reg_int(c, "tree_degree",
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"Degree of the tree for tree-based operations (must be => 1 and <= min(control_size, 255))",
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false, false,
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cs->sm_tree_degree,
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&cs->sm_tree_degree);
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if (cs->sm_tree_degree > cs->sm_control_size) {
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opal_show_help("help-coll-sm.txt",
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"tree-degree-larger-than-control", true,
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cs->sm_tree_degree, cs->sm_control_size);
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cs->sm_tree_degree = cs->sm_control_size;
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}
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if (cs->sm_tree_degree > 255) {
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opal_show_help("help-coll-sm.txt",
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"tree-degree-larger-than-255", true,
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cs->sm_tree_degree);
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cs->sm_tree_degree = 255;
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}
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/* Size of the bootstrap shared memory area. */
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size1 =
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sizeof(mca_coll_sm_bootstrap_header_extension_t) +
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(mca_coll_sm_component.sm_bootstrap_num_segments *
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sizeof(mca_coll_sm_bootstrap_comm_setup_t)) +
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(sizeof(uint32_t) * mca_coll_sm_component.sm_bootstrap_num_segments);
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mca_base_param_reg_int(c, "shared_mem_used_bootstrap",
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"Amount of shared memory used in the shared memory bootstrap area (in bytes)",
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false, true,
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size1, NULL);
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/* Calculate how much space we need in the data mpool. This
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formula taken directly from coll_sm_module.c. */
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mca_base_param_reg_int(c, "info_num_procs",
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"Number of processes to use for the calculation of the shared_mem_size MCA information parameter (must be => 2)",
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false, false,
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cs->sm_info_comm_size,
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&cs->sm_info_comm_size);
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size2 = 4 * cs->sm_control_size +
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(cs->sm_comm_num_in_use_flags * cs->sm_control_size) +
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(cs->sm_comm_num_segments * (cs->sm_info_comm_size * cs->sm_control_size * 2)) +
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(cs->sm_comm_num_segments * (cs->sm_info_comm_size * cs->sm_fragment_size));
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mca_base_param_reg_int(c, "shared_mem_used_data",
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"Amount of shared memory used in the shared memory data area for info_num_procs processes (in bytes)",
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false, true,
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size2, NULL);
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return OMPI_SUCCESS;
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}
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/*
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* Close the component
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*/
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static int sm_close(void)
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{
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if (NULL != mca_coll_sm_component.sm_mpool_name) {
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free(mca_coll_sm_component.sm_mpool_name);
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mca_coll_sm_component.sm_mpool_name = NULL;
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}
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mca_coll_sm_bootstrap_finalize();
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return OMPI_SUCCESS;
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}
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