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)
23 smx_action_t execution;
26 execution = SIMIX_req_host_execute("task", SIMIX_host_self(), flops);
27 SIMIX_req_host_execution_wait(execution);
31 /*** Timing macros ***/
32 static xbt_os_timer_t timer;
33 static int benchmarking = 0;
34 static xbt_dict_t benchmark_set = NULL;
35 static double reference = .00000000523066250047108838; /* FIXME: we should benchmark host machine to set this; unit=s/flop */
36 static double duration = 0.0;
38 static char *locbuf = NULL;
39 static unsigned int locbufsize;
41 void gras_emul_init(void)
44 benchmark_set = xbt_dict_new();
45 timer = xbt_os_timer_new();
49 void gras_emul_exit(void)
53 xbt_dict_free(&benchmark_set);
54 xbt_os_timer_free(timer);
58 static void store_in_dict(xbt_dict_t dict, const char *key, double value)
62 ir = xbt_dict_get_or_null(dict, key);
64 ir = xbt_new0(double, 1);
65 xbt_dict_set(dict, key, ir, xbt_free_f);
70 static double get_from_dict(xbt_dict_t dict, const char *key)
72 double *ir = xbt_dict_get(dict, key);
77 int gras_bench_always_begin(const char *location, int line)
79 xbt_assert0(!benchmarking, "Already benchmarking");
83 xbt_os_timer_start(timer);
87 int gras_bench_always_end(void)
89 xbt_assert0(benchmarking, "Not benchmarking yet");
91 xbt_os_timer_stop(timer);
92 duration = xbt_os_timer_elapsed(timer);
94 gras_cpu_burn(duration / reference);
99 int gras_bench_once_begin(const char *location, int line)
102 xbt_assert0(!benchmarking, "Already benchmarking");
105 if (!locbuf || locbufsize < strlen(location) + 64) {
106 locbufsize = strlen(location) + 64;
107 locbuf = xbt_realloc(locbuf, locbufsize);
109 sprintf(locbuf, "%s:%d", location, line);
111 ir = xbt_dict_get_or_null(benchmark_set, locbuf);
113 DEBUG1("%s", locbuf);
115 xbt_os_timer_start(timer);
123 int gras_bench_once_end(void)
125 xbt_assert0(benchmarking, "Not benchmarking yet");
128 xbt_os_timer_stop(timer);
129 duration = xbt_os_timer_elapsed(timer);
130 store_in_dict(benchmark_set, locbuf, duration);
132 duration = get_from_dict(benchmark_set, locbuf);
134 DEBUG2("Simulate the run of a task of %f sec for %s", duration, locbuf);
135 gras_cpu_burn(duration / reference);
140 /*** Conditional execution support ***/