initial commit

bin/allreduce.cpp

@@ -0,0 +1,27 @@
+#include "bench/bench.hpp"
+
+#include <mpi.h>
+
+void allreduce(bench::State &state) {
+
+
+    const int rank = bench::world_rank();
+    const int size = bench::world_size();
+
+    const size_t sz = 1000;
+
+    char *data = new char[sz];
+    for (auto _ : state) {
+        MPI_Allreduce(MPI_IN_PLACE, data, sz, MPI_BYTE, MPI_SUM, MPI_COMM_WORLD);
+    }
+
+    state.set_bytes_processed(sz * size);
+    delete[] data;
+}
+
+int main(int argc, char **argv) {
+    bench::init(argc, argv);
+    bench::register_bench("allreduce", allreduce)->timing_max_rank();
+    bench::run_benchmarks();
+    bench::finalize();
+}