This source file includes following definitions.
- ompi_coll_tuned_reduce_intra_check_forced_init
- ompi_coll_tuned_reduce_intra_do_this
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15 #include "ompi_config.h"
16
17 #include "mpi.h"
18 #include "ompi/constants.h"
19 #include "ompi/datatype/ompi_datatype.h"
20 #include "ompi/communicator/communicator.h"
21 #include "ompi/mca/coll/coll.h"
22 #include "ompi/mca/coll/base/coll_base_topo.h"
23 #include "ompi/mca/coll/base/coll_tags.h"
24 #include "ompi/mca/pml/pml.h"
25 #include "ompi/op/op.h"
26 #include "coll_tuned.h"
27
28
29 static int coll_tuned_reduce_forced_algorithm = 0;
30 static int coll_tuned_reduce_segment_size = 0;
31 static int coll_tuned_reduce_max_requests;
32 static int coll_tuned_reduce_tree_fanout;
33 static int coll_tuned_reduce_chain_fanout;
34
35
36 static mca_base_var_enum_value_t reduce_algorithms[] = {
37 {0, "ignore"},
38 {1, "linear"},
39 {2, "chain"},
40 {3, "pipeline"},
41 {4, "binary"},
42 {5, "binomial"},
43 {6, "in-order_binary"},
44 {7, "rabenseifner"},
45 {0, NULL}
46 };
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60 int ompi_coll_tuned_reduce_intra_check_forced_init (coll_tuned_force_algorithm_mca_param_indices_t *mca_param_indices)
61 {
62 mca_base_var_enum_t*new_enum;
63 int cnt;
64
65 for( cnt = 0; NULL != reduce_algorithms[cnt].string; cnt++ );
66 ompi_coll_tuned_forced_max_algorithms[REDUCE] = cnt;
67
68 (void) mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
69 "reduce_algorithm_count",
70 "Number of reduce algorithms available",
71 MCA_BASE_VAR_TYPE_INT, NULL, 0,
72 MCA_BASE_VAR_FLAG_DEFAULT_ONLY,
73 OPAL_INFO_LVL_5,
74 MCA_BASE_VAR_SCOPE_CONSTANT,
75 &ompi_coll_tuned_forced_max_algorithms[REDUCE]);
76
77
78 coll_tuned_reduce_forced_algorithm = 0;
79 (void) mca_base_var_enum_create("coll_tuned_reduce_algorithms", reduce_algorithms, &new_enum);
80 mca_param_indices->algorithm_param_index =
81 mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
82 "reduce_algorithm",
83 "Which reduce algorithm is used. Can be locked down to choice of: 0 ignore, 1 linear, 2 chain, 3 pipeline, 4 binary, 5 binomial, 6 in-order binary, 7 rabenseifner",
84 MCA_BASE_VAR_TYPE_INT, new_enum, 0, MCA_BASE_VAR_FLAG_SETTABLE,
85 OPAL_INFO_LVL_5,
86 MCA_BASE_VAR_SCOPE_ALL,
87 &coll_tuned_reduce_forced_algorithm);
88 OBJ_RELEASE(new_enum);
89 if (mca_param_indices->algorithm_param_index < 0) {
90 return mca_param_indices->algorithm_param_index;
91 }
92
93 coll_tuned_reduce_segment_size = 0;
94 mca_param_indices->segsize_param_index =
95 mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
96 "reduce_algorithm_segmentsize",
97 "Segment size in bytes used by default for reduce algorithms. Only has meaning if algorithm is forced and supports segmenting. 0 bytes means no segmentation.",
98 MCA_BASE_VAR_TYPE_INT, NULL, 0, MCA_BASE_VAR_FLAG_SETTABLE,
99 OPAL_INFO_LVL_5,
100 MCA_BASE_VAR_SCOPE_ALL,
101 &coll_tuned_reduce_segment_size);
102
103 coll_tuned_reduce_tree_fanout = ompi_coll_tuned_init_tree_fanout;
104 mca_param_indices->tree_fanout_param_index =
105 mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
106 "reduce_algorithm_tree_fanout",
107 "Fanout for n-tree used for reduce algorithms. Only has meaning if algorithm is forced and supports n-tree topo based operation.",
108 MCA_BASE_VAR_TYPE_INT, NULL, 0, MCA_BASE_VAR_FLAG_SETTABLE,
109 OPAL_INFO_LVL_5,
110 MCA_BASE_VAR_SCOPE_ALL,
111 &coll_tuned_reduce_tree_fanout);
112
113 coll_tuned_reduce_chain_fanout = ompi_coll_tuned_init_chain_fanout;
114 mca_param_indices->chain_fanout_param_index =
115 mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
116 "reduce_algorithm_chain_fanout",
117 "Fanout for chains used for reduce algorithms. Only has meaning if algorithm is forced and supports chain topo based operation.",
118 MCA_BASE_VAR_TYPE_INT, NULL, 0, MCA_BASE_VAR_FLAG_SETTABLE,
119 OPAL_INFO_LVL_5,
120 MCA_BASE_VAR_SCOPE_ALL,
121 &coll_tuned_reduce_chain_fanout);
122
123 coll_tuned_reduce_max_requests = 0;
124 mca_param_indices->max_requests_param_index =
125 mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
126 "reduce_algorithm_max_requests",
127 "Maximum number of outstanding send requests on leaf nodes. 0 means no limit.",
128 MCA_BASE_VAR_TYPE_INT, NULL, 0, MCA_BASE_VAR_FLAG_SETTABLE,
129 OPAL_INFO_LVL_5,
130 MCA_BASE_VAR_SCOPE_ALL,
131 &coll_tuned_reduce_max_requests);
132 if (mca_param_indices->max_requests_param_index < 0) {
133 return mca_param_indices->max_requests_param_index;
134 }
135
136 if (coll_tuned_reduce_max_requests < 0) {
137 if( 0 == ompi_comm_rank( MPI_COMM_WORLD ) ) {
138 opal_output( 0, "Maximum outstanding requests must be positive number or 0. Initializing to 0 (no limit).\n" );
139 }
140 coll_tuned_reduce_max_requests = 0;
141 }
142
143 return (MPI_SUCCESS);
144 }
145
146 int ompi_coll_tuned_reduce_intra_do_this(const void *sbuf, void* rbuf, int count,
147 struct ompi_datatype_t *dtype,
148 struct ompi_op_t *op, int root,
149 struct ompi_communicator_t *comm,
150 mca_coll_base_module_t *module,
151 int algorithm, int faninout,
152 int segsize, int max_requests )
153 {
154 OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_do_this selected algorithm %d topo faninout %d segsize %d",
155 algorithm, faninout, segsize));
156
157 switch (algorithm) {
158 case (0): return ompi_coll_tuned_reduce_intra_dec_fixed(sbuf, rbuf, count, dtype,
159 op, root, comm, module);
160 case (1): return ompi_coll_base_reduce_intra_basic_linear(sbuf, rbuf, count, dtype,
161 op, root, comm, module);
162 case (2): return ompi_coll_base_reduce_intra_chain(sbuf, rbuf, count, dtype,
163 op, root, comm, module,
164 segsize, faninout, max_requests);
165 case (3): return ompi_coll_base_reduce_intra_pipeline(sbuf, rbuf, count, dtype,
166 op, root, comm, module,
167 segsize, max_requests);
168 case (4): return ompi_coll_base_reduce_intra_binary(sbuf, rbuf, count, dtype,
169 op, root, comm, module,
170 segsize, max_requests);
171 case (5): return ompi_coll_base_reduce_intra_binomial(sbuf, rbuf, count, dtype,
172 op, root, comm, module,
173 segsize, max_requests);
174 case (6): return ompi_coll_base_reduce_intra_in_order_binary(sbuf, rbuf, count, dtype,
175 op, root, comm, module,
176 segsize, max_requests);
177 case (7): return ompi_coll_base_reduce_intra_redscat_gather(sbuf, rbuf, count, dtype,
178 op, root, comm, module);
179 }
180 OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:reduce_intra_do_this attempt to select algorithm %d when only 0-%d is valid?",
181 algorithm, ompi_coll_tuned_forced_max_algorithms[REDUCE]));
182 return (MPI_ERR_ARG);
183 }