1 /* sg_emul - Emulation support (simulation) */
3 /* Copyright (c) 2005, 2006, 2007, 2009, 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include <stdio.h> /* sprintf */
10 #include "gras/emul.h"
11 #include "gras/Virtu/virtu_sg.h"
12 #include "gras_modinter.h"
14 #include "xbt/xbt_os_time.h" /* timers */
18 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_virtu_emul, gras_virtu,
21 void gras_cpu_burn(double flops) {
27 cond = SIMIX_cond_init();
28 mutex = SIMIX_mutex_init();
30 SIMIX_mutex_lock(mutex);
32 SIMIX_action_execute(SIMIX_host_self(), "task", flops);
34 SIMIX_register_action_to_condition(act, cond);
35 SIMIX_cond_wait(cond, mutex);
36 SIMIX_unregister_action_to_condition(act, cond);
38 SIMIX_action_destroy(act);
39 SIMIX_mutex_unlock(mutex);
41 SIMIX_cond_destroy(cond);
42 SIMIX_mutex_destroy(mutex);
45 /*** Timing macros ***/
46 static xbt_os_timer_t timer;
47 static int benchmarking = 0;
48 static xbt_dict_t benchmark_set = NULL;
49 static double reference = .00000000523066250047108838; /* FIXME: we should benchmark host machine to set this; unit=s/flop */
50 static double duration = 0.0;
52 static char *locbuf = NULL;
53 static unsigned int locbufsize;
55 void gras_emul_init(void)
58 benchmark_set = xbt_dict_new();
59 timer = xbt_os_timer_new();
63 void gras_emul_exit(void)
67 xbt_dict_free(&benchmark_set);
68 xbt_os_timer_free(timer);
72 static void store_in_dict(xbt_dict_t dict, const char *key, double value)
76 ir = xbt_dict_get_or_null(dict, key);
78 ir = xbt_new0(double, 1);
79 xbt_dict_set(dict, key, ir, xbt_free_f);
84 static double get_from_dict(xbt_dict_t dict, const char *key)
86 double *ir = xbt_dict_get(dict, key);
91 int gras_bench_always_begin(const char *location, int line)
93 xbt_assert0(!benchmarking, "Already benchmarking");
97 xbt_os_timer_start(timer);
101 int gras_bench_always_end(void) {
102 xbt_assert0(benchmarking, "Not benchmarking yet");
104 xbt_os_timer_stop(timer);
105 duration = xbt_os_timer_elapsed(timer);
107 gras_cpu_burn(duration/reference);
112 int gras_bench_once_begin(const char *location, int line)
115 xbt_assert0(!benchmarking, "Already benchmarking");
118 if (!locbuf || locbufsize < strlen(location) + 64) {
119 locbufsize = strlen(location) + 64;
120 locbuf = xbt_realloc(locbuf, locbufsize);
122 sprintf(locbuf, "%s:%d", location, line);
124 ir = xbt_dict_get_or_null(benchmark_set, locbuf);
126 DEBUG1("%s", locbuf);
128 xbt_os_timer_start(timer);
136 int gras_bench_once_end(void) {
137 xbt_assert0(benchmarking, "Not benchmarking yet");
140 xbt_os_timer_stop(timer);
141 duration = xbt_os_timer_elapsed(timer);
142 store_in_dict(benchmark_set, locbuf, duration);
144 duration = get_from_dict(benchmark_set, locbuf);
146 DEBUG2("Simulate the run of a task of %f sec for %s", duration, locbuf);
147 gras_cpu_burn(duration/reference);
152 /*** Conditional execution support ***/