src/smpi/colls/smpi_automatic_selector.c

   1 #include "colls_private.h"
   2 #include <limits.h>
   3 #include "mc/mc_private.h"
   4
   5 //attempt to do a quick autotuning version of the collective,
   6
   7 #define AUTOMATIC_COLL_BENCH(cat, ret, args, args2)\
   8     ret smpi_coll_tuned_ ## cat ## _ ## automatic(COLL_UNPAREN args)\
   9 {\
  10   double time1, time2, time_min=INT_MAX;\
  11   int min_coll=-1, global_coll=-1;\
  12   int i;\
  13   double buf_in, buf_out, max_min=INT_MAX;\
  14   for (i = 0; mpi_coll_##cat##_description[i].name; i++){\
  15       if(!strcmp(mpi_coll_##cat##_description[i].name, "automatic"))continue;\
  16       if(!strcmp(mpi_coll_##cat##_description[i].name, "default"))continue;\
  17       smpi_mpi_barrier(comm);\
  18       if (TRACE_is_enabled()){\
  19         type_t type = PJ_type_get_or_null (#cat, PJ_type_get_root());\
  20          if (!type){\
  21              type=PJ_type_event_new(#cat, PJ_type_get_root());\
  22          }\
  23          char* cont_name=malloc(25*sizeof(char*));\
  24          sprintf(cont_name, "rank-%d", smpi_process_index());\
  25          val_t value = PJ_value_get_or_new(mpi_coll_##cat##_description[i].name,"1.0 1.0 1.0", type);\
  26          new_pajeNewEvent (SIMIX_get_clock(), PJ_container_get(cont_name), type, value);\
  27       }\
  28       time1 = SIMIX_get_clock();\
  29       ((int (*) args)\
  30           mpi_coll_##cat##_description[i].coll) args2 ;\
  31       time2 = SIMIX_get_clock();\
  32       buf_out=time2-time1;\
  33       smpi_mpi_reduce((void*)&buf_out,(void*)&buf_in, 1, MPI_DOUBLE, MPI_MAX, 0,comm );\
  34       if(time2-time1<time_min){\
  35           min_coll=i;\
  36           time_min=time2-time1;\
  37       }\
  38       if(smpi_comm_rank(comm)==0){\
  39           if(buf_in<max_min){\
  40               max_min=buf_in;\
  41               global_coll=i;\
  42           }\
  43       }\
  44   }\
  45   if(smpi_comm_rank(comm)==0){\
  46       XBT_WARN("For rank 0, the quickest was %s : %lf , but global was %s : %lf at max",mpi_coll_##cat##_description[min_coll].name, time_min,mpi_coll_##cat##_description[global_coll].name, max_min);\
  47   }else\
  48   XBT_WARN("The quickest reduce_scatter was %s on rank %d and took %lf",mpi_coll_##cat##_description[min_coll].name, smpi_comm_rank(comm), time_min);\
  49   return (min_coll!=-1)?MPI_SUCCESS:MPI_ERR_INTERN;\
  50 }\
  51
  52
  53 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLGATHERV_SIG, (send_buff, send_count, send_type, recv_buff, recv_count, recv_disps, recv_type, comm));
  54 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLREDUCE_SIG, (sbuf, rbuf, rcount, dtype, op, comm));
  55 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_GATHER_SIG, (send_buff, send_count, send_type, recv_buff, recv_count, recv_type, root, comm));
  56 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLGATHER_SIG, (send_buff,send_count,send_type,recv_buff,recv_count,recv_type,comm));
  57 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_ALLTOALL_SIG,(send_buff, send_count, send_type, recv_buff, recv_count, recv_type,comm));
  58 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));
  59 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_BCAST_SIG , (buf, count, datatype, root, comm));
  60 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_REDUCE_SIG,(buf,rbuf, count, datatype, op, root, comm));
  61 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_REDUCE_SCATTER_SIG ,(sbuf,rbuf, rcounts,dtype,op,comm));
  62 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_SCATTER_SIG ,(sendbuf, sendcount, sendtype,recvbuf, recvcount, recvtype,root, comm));
  63 COLL_APPLY(AUTOMATIC_COLL_BENCH, COLL_BARRIER_SIG,(comm));