TOOLS: Add perftest msg size multiplication factor flag

tools/perf/ucc_pt_benchmark.cc

@@ -98,7 +98,7 @@ ucc_status_t ucc_pt_benchmark::run_bench() noexcept
  double time;
 
  print_header();
- for (size_t cnt = min_count; cnt <= max_count; cnt *= 2) {
+ for (size_t cnt = min_count; cnt <= max_count; cnt *= config.mult_factor) {
  size_t coll_size = cnt * ucc_dt_size(config.dt);
  int iter = config.n_iter_small;
  int warmup = config.n_warmup_small;

tools/perf/ucc_pt_config.cc

@@ -29,6 +29,7 @@ ucc_pt_config::ucc_pt_config() {
  bench.n_bufs = UCC_PT_DEFAULT_N_BUFS;
  bench.root = 0;
  bench.root_shift = 0;
+ bench.mult_factor = 2;
  comm.mt = bench.mt;
 }
 
@@ -153,6 +154,9 @@ ucc_status_t ucc_pt_config::process_args(int argc, char *argv[])
  std::stringstream(optarg) >> bench.n_warmup_small;
  bench.n_warmup_large = bench.n_warmup_small;
  break;
+ case 'f':
+ std::stringstream(optarg) >> bench.mult_factor;
+ break;
  case 'N':
  std::stringstream(optarg) >> bench.n_bufs;
  break;
@@ -191,6 +195,7 @@ void ucc_pt_config::print_help()
  std::cout << " -m <mtype name>: memory type"<<std::endl;
  std::cout << " -n <number>: number of iterations"<<std::endl;
  std::cout << " -w <number>: number of warmup iterations"<<std::endl;
+ std::cout << " -f <number>: multiplication factor between sizes. Default : 2."<<std::endl;
  std::cout << " -N <number>: number of buffers"<<std::endl;
  std::cout << " -T: triggered collective"<<std::endl;
  std::cout << " -F: enable full print"<<std::endl;

tools/perf/ucc_pt_config.h

@@ -90,6 +90,7 @@ struct ucc_pt_benchmark_config {
  bool full_print;
  int root;
  int root_shift;
+ int mult_factor;
 };
 
 struct ucc_pt_config {