1 /* Copyright (c) 2012-2014. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include <xbt/parmap.h>
11 #include <xbt/sysdep.h>
12 #include "src/internal_config.h" /* HAVE_FUTEX_H */
13 #include "simgrid/simix.h"
14 #include "xbt/xbt_os_time.h"
16 #define MODES_DEFAULT 0x7
18 #define ARRAY_SIZE 10007
21 void (*fun_to_apply)(void *);
23 static const char *parmap_mode_name(e_xbt_parmap_mode_t mode)
27 case XBT_PARMAP_POSIX:
28 snprintf(name, sizeof name, "POSIX");
30 case XBT_PARMAP_FUTEX:
31 snprintf(name, sizeof name, "FUTEX");
33 case XBT_PARMAP_BUSY_WAIT:
34 snprintf(name, sizeof name, "BUSY_WAIT");
36 case XBT_PARMAP_DEFAULT:
37 snprintf(name, sizeof name, "DEFAULT");
40 snprintf(name, sizeof name, "UNKNOWN(%d)", (int)mode);
46 static int parmap_skip_mode(e_xbt_parmap_mode_t mode)
49 if (mode == XBT_PARMAP_FUTEX) {
50 printf("not available\n");
57 static unsigned fibonacci(unsigned n)
62 return fibonacci(n - 1) + fibonacci(n - 2);
65 static void fun_small_comp(void *arg)
71 static void fun_big_comp(void *arg)
74 *u = fibonacci(*u % FIBO_MAX);
77 static void array_new(unsigned **a, xbt_dynar_t *data)
79 *a = xbt_malloc(ARRAY_SIZE * sizeof **a);
80 *data = xbt_dynar_new(sizeof *a, NULL);
81 xbt_dynar_shrink(*data, ARRAY_SIZE);
82 for (int i = 0 ; i < ARRAY_SIZE ; i++) {
84 xbt_dynar_push_as(*data, void*, &(*a)[i]);
88 static void bench_parmap_full(int nthreads, e_xbt_parmap_mode_t mode)
95 printf("** mode = %-15s ", parmap_mode_name(mode));
98 if (parmap_skip_mode(mode))
101 array_new(&a, &data);
104 double start_time = xbt_os_time();
106 parmap = xbt_parmap_new(nthreads, mode);
107 xbt_parmap_apply(parmap, fun_to_apply, data);
108 xbt_parmap_destroy(parmap);
109 elapsed_time = xbt_os_time() - start_time;
111 } while (elapsed_time < TIMEOUT);
113 printf("ran %d times in %g seconds (%g/s)\n", i, elapsed_time, i / elapsed_time);
115 xbt_dynar_free(&data);
119 static void bench_parmap_apply(int nthreads, e_xbt_parmap_mode_t mode)
125 printf("** mode = %-15s ", parmap_mode_name(mode));
128 if (parmap_skip_mode(mode))
131 array_new(&a, &data);
133 xbt_parmap_t parmap = xbt_parmap_new(nthreads, mode);
135 double start_time = xbt_os_time();
137 xbt_parmap_apply(parmap, fun_to_apply, data);
138 elapsed_time = xbt_os_time() - start_time;
140 } while (elapsed_time < TIMEOUT);
141 xbt_parmap_destroy(parmap);
143 printf("ran %d times in %g seconds (%g/s)\n", i, elapsed_time, i / elapsed_time);
145 xbt_dynar_free(&data);
149 static void bench_all_modes(void (*bench_fun)(int, e_xbt_parmap_mode_t),
150 int nthreads, unsigned modes)
152 e_xbt_parmap_mode_t all_modes[] = {XBT_PARMAP_POSIX, XBT_PARMAP_FUTEX, XBT_PARMAP_BUSY_WAIT, XBT_PARMAP_DEFAULT};
154 for (unsigned i = 0 ; i < sizeof all_modes / sizeof all_modes[0] ; i++) {
156 bench_fun(nthreads, all_modes[i]);
160 int main(int argc, char *argv[])
163 unsigned modes = MODES_DEFAULT;
165 SIMIX_global_init(&argc, argv);
167 if (argc != 2 && argc != 3) {
168 fprintf(stderr, "Usage: %s nthreads [modes]\n"
169 " nthreads - number of working threads\n"
170 " modes - bitmask of modes to test\n",
174 nthreads = atoi(argv[1]);
176 fprintf(stderr, "ERROR: invalid thread count: %d\n", nthreads);
180 modes = strtol(argv[2], NULL, 0);
182 printf("Parmap benchmark with %d workers (modes = %#x)...\n\n", nthreads, modes);
184 fun_to_apply = &fun_small_comp;
186 printf("Benchmark for parmap create+apply+destroy (small comp):\n");
187 bench_all_modes(bench_parmap_full, nthreads, modes);
190 printf("Benchmark for parmap apply only (small comp):\n");
191 bench_all_modes(bench_parmap_apply, nthreads, modes);
194 fun_to_apply = &fun_big_comp;
196 printf("Benchmark for parmap create+apply+destroy (big comp):\n");
197 bench_all_modes(bench_parmap_full, nthreads, modes);
200 printf("Benchmark for parmap apply only (big comp):\n");
201 bench_all_modes(bench_parmap_apply, nthreads, modes);