1 /* Copyright (c) 2007, 2009, 2010. 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. */
7 #include <math.h> // sqrt
10 #include "xbt/sysdep.h"
12 #include "surf/surf.h"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_bench, smpi,
15 "Logging specific to SMPI (benchmarking)");
17 xbt_dict_t allocs = NULL; /* Allocated on first use */
18 xbt_dict_t samples = NULL; /* Allocated on first use */
19 xbt_dict_t calls = NULL; /* Allocated on first use */
37 void smpi_bench_destroy(void)
40 xbt_dict_free(&allocs);
43 xbt_dict_free(&samples);
46 xbt_dict_free(&calls);
50 static void smpi_execute_flops(double flops)
54 host = SIMIX_host_self();
56 XBT_DEBUG("Handle real computation time: %f flops", flops);
57 action = SIMIX_req_host_execute("computation", host, flops, 1);
59 SIMIX_req_set_category (action, TRACE_internal_smpi_get_category());
61 SIMIX_req_host_execution_wait(action);
64 static void smpi_execute(double duration)
66 if (duration >= xbt_cfg_get_double(_surf_cfg_set, "smpi/cpu_threshold")) {
67 XBT_DEBUG("Sleep for %f to handle real computation time", duration);
68 smpi_execute_flops(duration *
69 xbt_cfg_get_double(_surf_cfg_set,
70 "smpi/running_power"));
74 void smpi_bench_begin(void)
76 xbt_os_timer_start(smpi_process_timer());
79 void smpi_bench_end(void)
81 xbt_os_timer_t timer = smpi_process_timer();
83 xbt_os_timer_stop(timer);
84 smpi_execute(xbt_os_timer_elapsed(timer));
87 unsigned int smpi_sleep(unsigned int secs)
89 smpi_execute((double) secs);
93 int smpi_gettimeofday(struct timeval *tv, struct timezone *tz)
95 double now = SIMIX_get_clock();
98 tv->tv_sec = (time_t) now;
99 tv->tv_usec = (suseconds_t) (now * 1e6);
104 static char *sample_location(int global, const char *file, int line)
107 return bprintf("%s:%d", file, line);
109 return bprintf("%s:%d:%d", file, line, smpi_process_index());
113 int smpi_sample_1(int global, const char *file, int line, int iters, double threshold)
115 char *loc = sample_location(global, file, line);
118 smpi_bench_end(); /* Take time from previous MPI call into account */
120 samples = xbt_dict_new();
122 data = xbt_dict_get_or_null(samples, loc);
124 data = (local_data_t *) xbt_new(local_data_t, 1);
127 data->sum_pow2 = 0.0;
129 data->threshold = threshold;
131 xbt_dict_set(samples, loc, data, &free);
138 int smpi_sample_2(int global, const char *file, int line)
140 char *loc = sample_location(global, file, line);
143 xbt_assert(samples, "You did something very inconsistent, didn't you?");
144 data = xbt_dict_get_or_null(samples, loc);
146 xbt_assert(data, "Please, do thing in order");
148 if (!data->started) {
149 if ((data->iters > 0 && data->count >= data->iters)
150 || (data->count > 1 && data->threshold > 0.0 && data->relstderr <= data->threshold)) {
151 XBT_DEBUG("Perform some wait of %f", data->mean);
152 smpi_execute(data->mean);
162 smpi_process_simulated_start();
163 return data->started;
166 void smpi_sample_3(int global, const char *file, int line)
168 char *loc = sample_location(global, file, line);
172 xbt_assert(samples, "You did something very inconsistent, didn't you?");
173 data = xbt_dict_get_or_null(samples, loc);
175 if(data && data->started && data->count < data->iters) {
176 sample = smpi_process_simulated_elapsed();
178 data->sum_pow2 += sample * sample;
179 n = (double)data->count;
180 data->mean = data->sum / n;
181 data->relstderr = sqrt((data->sum_pow2 / n - data->mean * data->mean) / n) / data->mean;
182 XBT_DEBUG("Average mean after %d steps is %f, relative standard error is %f (sample was %f)", data->count,
183 data->mean, data->relstderr, sample);
188 void smpi_sample_flops(double flops)
190 smpi_execute_flops(flops);
193 void *smpi_shared_malloc(size_t size, const char *file, int line)
195 char *loc = bprintf("%s:%d:%zu", file, line, size);
199 allocs = xbt_dict_new();
201 data = xbt_dict_get_or_null(allocs, loc);
203 data = (shared_data_t *) xbt_malloc0(sizeof(int) + size);
205 xbt_dict_set(allocs, loc, data, &free);
213 void smpi_shared_free(void *ptr)
215 shared_data_t *data = (shared_data_t *) ((int *) ptr - 1);
219 XBT_WARN("Cannot free: nothing was allocated");
222 loc = xbt_dict_get_key(allocs, data);
224 XBT_WARN("Cannot free: %p was not shared-allocated by SMPI", ptr);
228 if (data->count <= 0) {
229 xbt_dict_remove(allocs, loc);
233 int smpi_shared_known_call(const char* func, const char* input) {
234 char* loc = bprintf("%s:%s", func, input);
239 calls = xbt_dict_new();
242 xbt_dict_get(calls, loc); /* Succeed or throw */
246 if(ex.category == not_found_error) {
257 void* smpi_shared_get_call(const char* func, const char* input) {
258 char* loc = bprintf("%s:%s", func, input);
262 calls = xbt_dict_new();
264 data = xbt_dict_get(calls, loc);
269 void* smpi_shared_set_call(const char* func, const char* input, void* data) {
270 char* loc = bprintf("%s:%s", func, input);
273 calls = xbt_dict_new();
275 xbt_dict_set(calls, loc, data, NULL);