mpi/src/starpu_mpi_cache_stats.c: remove internal array which is not needed

mpi/src/starpu_mpi_cache_stats.c

@@ -19,9 +19,6 @@
 #include <stdio.h>
 #include <starpu_mpi_private.h>
 
-/* measure the amount of data transfers between each pair of MPI nodes */
-static size_t *comm_cache_amount;
-static int world_size;
 static int stats_enabled=0;
 
 void _starpu_mpi_cache_stats_init(MPI_Comm comm)
@@ -35,16 +32,11 @@ void _starpu_mpi_cache_stats_init(MPI_Comm comm)
 
 	_STARPU_DISP("Warning: StarPU is executed with STARPU_MPI_CACHE_STATS=1, which slows down a bit\n");
 
-	starpu_mpi_comm_size(comm, &world_size);
-	_STARPU_MPI_DEBUG(1, "allocating for %d nodes\n", world_size);
-
-	_STARPU_MPI_CALLOC(comm_cache_amount, world_size, sizeof(size_t));
 }
 
 void _starpu_mpi_cache_stats_shutdown()
 {
 	if (stats_enabled == 0) return;
-	free(comm_cache_amount);
 }
 
 void _starpu_mpi_cache_stats_update(unsigned dst, starpu_data_handle_t data_handle, int count)
@@ -63,7 +55,5 @@ void _starpu_mpi_cache_stats_update(unsigned dst, starpu_data_handle_t data_hand
 	{
 		_STARPU_MPI_MSG("[communication cache] - %10ld from %d\n", (long)size, dst);
 	}
-
-	comm_cache_amount[dst] += count * size;
 }