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Merge pull request #218 from Takishipp/MSG2S4U
[simgrid.git] / src / smpi / colls / smpi_automatic_selector.cpp
1 /* Copyright (c) 2013-2017. The SimGrid Team.
2  * All rights reserved.                                                     */
3
4 /* This program is free software; you can redistribute it and/or modify it
5  * under the terms of the license (GNU LGPL) which comes with this package. */
6
7 #include <cfloat>
8
9 #include <exception>
10
11 #include "colls_private.h"
12 #include "smpi_process.hpp"
13
14
15 //attempt to do a quick autotuning version of the collective,
16
17 #define TRACE_AUTO_COLL(cat)                                                                                           \
18   if (TRACE_is_enabled()) {                                                                                            \
19     simgrid::instr::Type* type = simgrid::instr::Type::getOrNull(#cat, PJ_type_get_root());                            \
20     if (not type) {                                                                                                    \
21       type = simgrid::instr::Type::eventNew(#cat, PJ_type_get_root());                                                 \
22     }                                                                                                                  \
23     char cont_name[25];                                                                                                \
24     snprintf(cont_name, 25, "rank-%d", smpi_process()->index());                                                       \
25     simgrid::instr::Value* val =                                                                                       \
26         simgrid::instr::Value::get_or_new(Colls::mpi_coll_##cat##_description[i].name, "1.0 1.0 1.0", type);           \
27     new simgrid::instr::NewEvent(SIMIX_get_clock(), PJ_container_get(cont_name), type, val);                           \
28   }
29
30 #define AUTOMATIC_COLL_BENCH(cat, ret, args, args2)                                                                    \
31   ret Coll_##cat##_automatic::cat(COLL_UNPAREN args)                                                                   \
32   {                                                                                                                    \
33     double time1, time2, time_min = DBL_MAX;                                                                           \
34     int min_coll = -1, global_coll = -1;                                                                               \
35     int i;                                                                                                             \
36     double buf_in, buf_out, max_min = DBL_MAX;                                                                         \
37     for (i = 0; Colls::mpi_coll_##cat##_description[i].name; i++) {                                                    \
38       if (not strcmp(Colls::mpi_coll_##cat##_description[i].name, "automatic"))                                        \
39         continue;                                                                                                      \
40       if (not strcmp(Colls::mpi_coll_##cat##_description[i].name, "default"))                                          \
41         continue;                                                                                                      \
42       Coll_barrier_default::barrier(comm);                                                                             \
43       TRACE_AUTO_COLL(cat)                                                                                             \
44       time1 = SIMIX_get_clock();                                                                                       \
45       try {                                                                                                            \
46         ((int(*) args)Colls::mpi_coll_##cat##_description[i].coll) args2;                                              \
47       } catch (std::exception & ex) {                                                                                  \
48         continue;                                                                                                      \
49       }                                                                                                                \
50       time2   = SIMIX_get_clock();                                                                                     \
51       buf_out = time2 - time1;                                                                                         \
52       Coll_reduce_default::reduce((void*)&buf_out, (void*)&buf_in, 1, MPI_DOUBLE, MPI_MAX, 0, comm);                   \
53       if (time2 - time1 < time_min) {                                                                                  \
54         min_coll = i;                                                                                                  \
55         time_min = time2 - time1;                                                                                      \
56       }                                                                                                                \
57       if (comm->rank() == 0) {                                                                                         \
58         if (buf_in < max_min) {                                                                                        \
59           max_min     = buf_in;                                                                                        \
60           global_coll = i;                                                                                             \
61         }                                                                                                              \
62       }                                                                                                                \
63     }                                                                                                                  \
64     if (comm->rank() == 0) {                                                                                           \
65       XBT_WARN("For rank 0, the quickest was %s : %f , but global was %s : %f at max",                                 \
66                Colls::mpi_coll_##cat##_description[min_coll].name, time_min,                                           \
67                Colls::mpi_coll_##cat##_description[global_coll].name, max_min);                                        \
68     } else                                                                                                             \
69       XBT_WARN("The quickest %s was %s on rank %d and took %f", #cat,                                                  \
70                Colls::mpi_coll_##cat##_description[min_coll].name, comm->rank(), time_min);                            \
71     return (min_coll != -1) ? MPI_SUCCESS : MPI_ERR_INTERN;                                                            \
72   }
73
74 namespace simgrid{
75 namespace smpi{
76
77 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLGATHERV_SIG, (send_buff, send_count, send_type, recv_buff, recv_count, recv_disps, recv_type, comm));
78 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLREDUCE_SIG, (sbuf, rbuf, rcount, dtype, op, comm));
79 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_GATHER_SIG, (send_buff, send_count, send_type, recv_buff, recv_count, recv_type, root, comm));
80 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLGATHER_SIG, (send_buff,send_count,send_type,recv_buff,recv_count,recv_type,comm));
81 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLTOALL_SIG,(send_buff, send_count, send_type, recv_buff, recv_count, recv_type,comm));
82 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLTOALLV_SIG, (send_buff, send_counts, send_disps, send_type, recv_buff, recv_counts, recv_disps, recv_type, comm));
83 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_BCAST_SIG , (buf, count, datatype, root, comm));
84 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_REDUCE_SIG,(buf,rbuf, count, datatype, op, root, comm));
85 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_REDUCE_SCATTER_SIG ,(sbuf,rbuf, rcounts,dtype,op,comm));
86 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_SCATTER_SIG ,(sendbuf, sendcount, sendtype,recvbuf, recvcount, recvtype,root, comm));
87 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_BARRIER_SIG,(comm));
88
89 }
90 }