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[sonar] Const etc. (round #3).
[simgrid.git] / src / smpi / colls / smpi_automatic_selector.cpp
1 /* Copyright (c) 2013-2020. The SimGrid Team. All rights reserved.          */
2
3 /* This program is free software; you can redistribute it and/or modify it
4  * under the terms of the license (GNU LGPL) which comes with this package. */
5
6 #include <cfloat>
7 #include <exception>
8
9 #include "colls_private.hpp"
10 #include "src/smpi/include/smpi_actor.hpp"
11
12 //attempt to do a quick autotuning version of the collective,
13 #define AUTOMATIC_COLL_BENCH(cat, ret, args, args2)                                                                    \
14   ret _XBT_CONCAT2(cat, __automatic)(COLL_UNPAREN args)                                                                \
15   {                                                                                                                    \
16     double time1, time2, time_min = DBL_MAX;                                                                           \
17     int min_coll = -1, global_coll = -1;                                                                               \
18     double buf_in, buf_out, max_min = DBL_MAX;                                                                         \
19     auto descriptions = simgrid::smpi::colls::get_smpi_coll_descriptions(_XBT_STRINGIFY(cat));                         \
20     for (unsigned long i = 0; i < descriptions->size(); i++) {                                                         \
21       auto desc = &descriptions->at(i);                                                                                \
22       if (desc->name == "automatic" || desc->name == "default")                                                        \
23         continue;                                                                                                      \
24       barrier__default(comm);                                                                                          \
25       if (TRACE_is_enabled()) {                                                                                        \
26         simgrid::instr::EventType* type =                                                                              \
27             simgrid::instr::Container::get_root()->type_->by_name_or_create<simgrid::instr::EventType>(                \
28                 _XBT_STRINGIFY(cat));                                                                                  \
29                                                                                                                        \
30         std::string cont_name = std::string("rank-" + std::to_string(simgrid::s4u::this_actor::get_pid()));            \
31         type->add_entity_value(desc->name, "1.0 1.0 1.0");                                                             \
32         new simgrid::instr::NewEvent(SIMIX_get_clock(), simgrid::instr::Container::by_name(cont_name), type,           \
33                                      type->get_entity_value(desc->name));                                              \
34       }                                                                                                                \
35       time1 = SIMIX_get_clock();                                                                                       \
36       try {                                                                                                            \
37         ((int(*) args)desc->coll) args2;                                                                               \
38       } catch (std::exception & ex) {                                                                                  \
39         continue;                                                                                                      \
40       }                                                                                                                \
41       time2   = SIMIX_get_clock();                                                                                     \
42       buf_out = time2 - time1;                                                                                         \
43       reduce__default((void*)&buf_out, (void*)&buf_in, 1, MPI_DOUBLE, MPI_MAX, 0, comm);                               \
44       if (time2 - time1 < time_min) {                                                                                  \
45         min_coll = i;                                                                                                  \
46         time_min = time2 - time1;                                                                                      \
47       }                                                                                                                \
48       if (comm->rank() == 0) {                                                                                         \
49         if (buf_in < max_min) {                                                                                        \
50           max_min     = buf_in;                                                                                        \
51           global_coll = i;                                                                                             \
52         }                                                                                                              \
53       }                                                                                                                \
54     }                                                                                                                  \
55     if (comm->rank() == 0) {                                                                                           \
56       XBT_WARN("For rank 0, the quickest was %s : %f , but global was %s : %f at max",                                 \
57                descriptions->at(min_coll).name.c_str(), time_min, descriptions->at(global_coll).name.c_str(),          \
58                max_min);                                                                                               \
59     } else                                                                                                             \
60       XBT_WARN("The quickest " _XBT_STRINGIFY(cat) " was %s on rank %d and took %f",                                   \
61                descriptions->at(min_coll).name.c_str(), comm->rank(), time_min);                                       \
62     return (min_coll != -1) ? MPI_SUCCESS : MPI_ERR_INTERN;                                                            \
63   }
64
65 namespace simgrid{
66 namespace smpi{
67
68 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLGATHERV_SIG, (send_buff, send_count, send_type, recv_buff, recv_count, recv_disps, recv_type, comm))
69 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLREDUCE_SIG, (sbuf, rbuf, rcount, dtype, op, comm))
70 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_GATHER_SIG, (send_buff, send_count, send_type, recv_buff, recv_count, recv_type, root, comm))
71 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLGATHER_SIG, (send_buff,send_count,send_type,recv_buff,recv_count,recv_type,comm))
72 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLTOALL_SIG,(send_buff, send_count, send_type, recv_buff, recv_count, recv_type,comm))
73 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))
74 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_BCAST_SIG , (buf, count, datatype, root, comm))
75 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_REDUCE_SIG,(buf,rbuf, count, datatype, op, root, comm))
76 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_REDUCE_SCATTER_SIG ,(sbuf,rbuf, rcounts,dtype,op,comm))
77 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_SCATTER_SIG ,(sendbuf, sendcount, sendtype,recvbuf, recvcount, recvtype,root, comm))
78 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_BARRIER_SIG,(comm))
79
80 }
81 }