-/* Copyright (c) 2012-2017. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2012-2019. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "src/internal_config.h" // HAVE_FUTEX_H
+#include "xbt/parmap.hpp"
#include <simgrid/msg.h>
#include <xbt.h>
-#include <xbt/parmap.hpp>
#include <cstdlib>
#include <numeric> // std::iota
XBT_LOG_NEW_DEFAULT_CATEGORY(parmap_bench, "Bench for parmap");
-#define MODES_DEFAULT 0x7
-#define TIMEOUT 10.0
-#define ARRAY_SIZE 10007
-#define FIBO_MAX 25
+constexpr unsigned MODES_DEFAULT = 0x7;
+constexpr unsigned ARRAY_SIZE = 10007;
+constexpr unsigned FIBO_MAX = 25;
void (*fun_to_apply)(unsigned*);
return name;
}
-static bool parmap_skip_mode(e_xbt_parmap_mode_t mode)
-{
- return mode == XBT_PARMAP_FUTEX && not HAVE_FUTEX_H;
-}
-
static unsigned fibonacci(unsigned n)
{
if (n < 2)
*arg = fibonacci(*arg % FIBO_MAX);
}
-static void bench_parmap_full(int nthreads, e_xbt_parmap_mode_t mode)
-{
- XBT_INFO("** mode = %s", parmap_mode_name(mode).c_str());
-
- if (parmap_skip_mode(mode)) {
- XBT_INFO(" not available");
- return;
- }
-
- std::vector<unsigned> a(ARRAY_SIZE);
- std::vector<unsigned*> data(ARRAY_SIZE);
- std::iota(begin(a), end(a), 0);
- std::iota(begin(data), end(data), &a[0]);
-
- int i = 0;
- double start_time = xbt_os_time();
- double elapsed_time;
- do {
- {
- simgrid::xbt::Parmap<unsigned*> parmap(nthreads, mode);
- parmap.apply(fun_to_apply, data);
- } // enclosing block to ensure that the parmap is destroyed here.
- elapsed_time = xbt_os_time() - start_time;
- i++;
- } while (elapsed_time < TIMEOUT);
-
- XBT_INFO(" ran %d times in %g seconds (%g/s)", i, elapsed_time, i / elapsed_time);
-}
-
-static void bench_parmap_apply(int nthreads, e_xbt_parmap_mode_t mode)
+static void bench_parmap(int nthreads, double timeout, e_xbt_parmap_mode_t mode, bool full_bench)
{
- XBT_INFO("** mode = %s", parmap_mode_name(mode).c_str());
+ std::string mode_name = parmap_mode_name(mode);
+ XBT_INFO("** mode = %s", mode_name.c_str());
- if (parmap_skip_mode(mode)) {
+ if (mode == XBT_PARMAP_FUTEX && not HAVE_FUTEX_H) {
XBT_INFO(" not available");
return;
}
std::iota(begin(a), end(a), 0);
std::iota(begin(data), end(data), &a[0]);
- simgrid::xbt::Parmap<unsigned*> parmap(nthreads, mode);
+ auto* parmap = new simgrid::xbt::Parmap<unsigned*>(nthreads, mode);
int i = 0;
double start_time = xbt_os_time();
double elapsed_time;
do {
- parmap.apply(fun_to_apply, data);
+ if (full_bench) {
+ delete parmap;
+ parmap = new simgrid::xbt::Parmap<unsigned*>(nthreads, mode);
+ }
+ parmap->apply(fun_to_apply, data);
elapsed_time = xbt_os_time() - start_time;
i++;
- } while (elapsed_time < TIMEOUT);
+ } while (elapsed_time < timeout);
+ delete parmap;
XBT_INFO(" ran %d times in %g seconds (%g/s)", i, elapsed_time, i / elapsed_time);
}
-static void bench_all_modes(void (*bench_fun)(int, e_xbt_parmap_mode_t), int nthreads, unsigned modes)
+static void bench_all_modes(int nthreads, double timeout, unsigned modes, bool full_bench)
{
std::vector<e_xbt_parmap_mode_t> all_modes = {XBT_PARMAP_POSIX, XBT_PARMAP_FUTEX, XBT_PARMAP_BUSY_WAIT,
XBT_PARMAP_DEFAULT};
for (unsigned i = 0; i < all_modes.size(); i++) {
if (1U << i & modes)
- bench_fun(nthreads, all_modes[i]);
+ bench_parmap(nthreads, timeout, all_modes[i], full_bench);
}
}
int main(int argc, char* argv[])
{
int nthreads;
+ double timeout;
unsigned modes = MODES_DEFAULT;
xbt_log_control_set("parmap_bench.fmt:[%c/%p]%e%m%n");
MSG_init(&argc, argv);
- if (argc != 2 && argc != 3) {
- XBT_INFO("Usage: %s nthreads [modes]", argv[0]);
+ if (argc != 3 && argc != 4) {
+ XBT_INFO("Usage: %s nthreads timeout [modes]", argv[0]);
XBT_INFO(" nthreads - number of working threads");
+ XBT_INFO(" timeout - max duration for each test");
XBT_INFO(" modes - bitmask of modes to test");
return EXIT_FAILURE;
}
XBT_ERROR("Invalid thread count: %d", nthreads);
return EXIT_FAILURE;
}
- if (argc == 3)
+ timeout = atof(argv[2]);
+ if (argc == 4)
modes = strtol(argv[2], NULL, 0);
XBT_INFO("Parmap benchmark with %d workers (modes = %#x)...", nthreads, modes);
XBT_INFO("%s", "");
+ SIMIX_context_set_nthreads(nthreads);
fun_to_apply = &fun_small_comp;
XBT_INFO("Benchmark for parmap create+apply+destroy (small comp):");
- bench_all_modes(bench_parmap_full, nthreads, modes);
+ bench_all_modes(nthreads, timeout, modes, true);
XBT_INFO("%s", "");
XBT_INFO("Benchmark for parmap apply only (small comp):");
- bench_all_modes(bench_parmap_apply, nthreads, modes);
+ bench_all_modes(nthreads, timeout, modes, false);
XBT_INFO("%s", "");
fun_to_apply = &fun_big_comp;
XBT_INFO("Benchmark for parmap create+apply+destroy (big comp):");
- bench_all_modes(bench_parmap_full, nthreads, modes);
+ bench_all_modes(nthreads, timeout, modes, true);
XBT_INFO("%s", "");
XBT_INFO("Benchmark for parmap apply only (big comp):");
- bench_all_modes(bench_parmap_apply, nthreads, modes);
+ bench_all_modes(nthreads, timeout, modes, false);
XBT_INFO("%s", "");
return EXIT_SUCCESS;