+/* Copyright (c) 2007, 2009, 2010. 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 "private.h"
+#include "xbt/dict.h"
+#include "xbt/sysdep.h"
+#include "xbt/ex.h"
+#include "surf/surf.h"
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_bench, smpi,
+ "Logging specific to SMPI (benchmarking)");
+
+xbt_dict_t allocs = NULL; /* Allocated on first use */
+xbt_dict_t samples = NULL; /* Allocated on first use */
+xbt_dict_t calls = NULL; /* Allocated on first use */
+
+typedef struct {
+ int count;
+ char data[];
+} shared_data_t;
+
+typedef struct {
+ int count;
+ double sum;
+ double sum_pow2;
+ double mean;
+ double relstderr;
+ int iters;
+ double threshold;
+ int started;
+} local_data_t;
+
+void smpi_bench_destroy(void)
+{
+ if (allocs) {
+ xbt_dict_free(&allocs);
+ }
+ if (samples) {
+ xbt_dict_free(&samples);
+ }
+ if(calls) {
+ xbt_dict_free(&calls);
+ }
+}
+
+static void smpi_execute_flops(double flops)
+{
+ smx_action_t action;
+ smx_host_t host;
+ host = SIMIX_host_self();
+
+ XBT_DEBUG("Handle real computation time: %f flops", flops);
+ action = SIMIX_req_host_execute("computation", host, flops, 1);
+#ifdef HAVE_TRACING
+ SIMIX_req_set_category (action, TRACE_internal_smpi_get_category());
+#endif
+ SIMIX_req_host_execution_wait(action);
+}
+
+static void smpi_execute(double duration)
+{
+ if (duration >= xbt_cfg_get_double(_surf_cfg_set, "smpi/cpu_threshold")) {
+ XBT_DEBUG("Sleep for %f to handle real computation time", duration);
+ smpi_execute_flops(duration *
+ xbt_cfg_get_double(_surf_cfg_set,
+ "smpi/running_power"));
+ }
+}
+
+void smpi_bench_begin(void)
+{
+ xbt_os_timer_start(smpi_process_timer());
+}
+
+void smpi_bench_end(void)
+{
+ xbt_os_timer_t timer = smpi_process_timer();
+
+ xbt_os_timer_stop(timer);
+ smpi_execute(xbt_os_timer_elapsed(timer));
+}
+
+unsigned int smpi_sleep(unsigned int secs)
+{
+ smpi_execute((double) secs);
+ return secs;
+}
+
+int smpi_gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+ double now = SIMIX_get_clock();
+
+ if (tv) {
+ tv->tv_sec = (time_t) now;
+ tv->tv_usec = (suseconds_t) (now * 1e6);
+ }
+ return 0;
+}
+
+static char *sample_location(int global, const char *file, int line)
+{
+ if (global) {
+ return bprintf("%s:%d", file, line);
+ } else {
+ return bprintf("%s:%d:%d", file, line, smpi_process_index());
+ }
+}
+
+int smpi_sample_1(int global, const char *file, int line, int iters, double threshold)
+{
+ char *loc = sample_location(global, file, line);
+ local_data_t *data;
-// FIXME: could cause trouble with multithreaded procs on same host...
-// FIXME: add benchmarking flag?
+ smpi_bench_end(); /* Take time from previous MPI call into account */
+ if (!samples) {
+ samples = xbt_dict_new();
+ }
+ data = xbt_dict_get_or_null(samples, loc);
+ if (!data) {
+ data = (local_data_t *) xbt_new(local_data_t, 1);
+ data->count = 0;
+ data->sum = 0.0;
+ data->sum_pow2 = 0.0;
+ data->iters = iters;
+ data->threshold = threshold;
+ data->started = 0;
+ xbt_dict_set(samples, loc, data, &free);
+ return 0;
+ }
+ free(loc);
+ return 1;
+}
-void smpi_bench_begin()
+int smpi_sample_2(int global, const char *file, int line)
{
- SIMIX_mutex_lock(smpi_global->timer_mutex);
- xbt_os_timer_start(smpi_global->timer);
- return;
+ char *loc = sample_location(global, file, line);
+ local_data_t *data;
+
+ xbt_assert(samples, "You did something very inconsistent, didn't you?");
+ data = xbt_dict_get_or_null(samples, loc);
+ if (!data) {
+ xbt_assert(data, "Please, do thing in order");
+ }
+ if (!data->started) {
+ if ((data->iters > 0 && data->count >= data->iters)
+ || (data->count > 1 && data->threshold > 0.0 && data->relstderr <= data->threshold)) {
+ XBT_DEBUG("Perform some wait of %f", data->mean);
+ smpi_execute(data->mean);
+ } else {
+ data->started = 1;
+ data->count++;
+ }
+ } else {
+ data->started = 0;
+ }
+ free(loc);
+ smpi_bench_begin();
+ smpi_process_simulated_start();
+ return data->started;
}
-void smpi_bench_end()
+void smpi_sample_3(int global, const char *file, int line)
{
- double duration;
- smx_host_t host;
- char computation[] = "computation";
- smx_action_t action;
+ char *loc = sample_location(global, file, line);
+ local_data_t *data;
+ double sample, n;
- xbt_os_timer_stop(smpi_global->timer);
- duration = xbt_os_timer_elapsed(smpi_global->timer);
- host = SIMIX_host_self();
- action = SIMIX_action_execute(host, computation, duration * SMPI_DEFAULT_SPEED);
+ xbt_assert(samples, "You did something very inconsistent, didn't you?");
+ data = xbt_dict_get_or_null(samples, loc);
+ smpi_bench_end();
+ if(data && data->started && data->count < data->iters) {
+ sample = smpi_process_simulated_elapsed();
+ data->sum += sample;
+ data->sum_pow2 += sample * sample;
+ n = (double)data->count;
+ data->mean = data->sum / n;
+ data->relstderr = sqrt((data->sum_pow2 / n - data->mean * data->mean) / n) / data->mean;
+ XBT_DEBUG("Average mean after %d steps is %f, relative standard error is %f (sample was %f)", data->count,
+ data->mean, data->relstderr, sample);
+ }
+ free(loc);
+}
+
+void smpi_sample_flops(double flops)
+{
+ smpi_execute_flops(flops);
+}
- SIMIX_register_action_to_condition(action, smpi_global->timer_cond);
- SIMIX_cond_wait(smpi_global->timer_cond, smpi_global->timer_mutex);
- SIMIX_unregister_action_to_condition(action, smpi_global->timer_cond);
+void *smpi_shared_malloc(size_t size, const char *file, int line)
+{
+ char *loc = bprintf("%s:%d:%zu", file, line, size);
+ shared_data_t *data;
+
+ if (!allocs) {
+ allocs = xbt_dict_new();
+ }
+ data = xbt_dict_get_or_null(allocs, loc);
+ if (!data) {
+ data = (shared_data_t *) xbt_malloc0(sizeof(int) + size);
+ data->count = 1;
+ xbt_dict_set(allocs, loc, data, &free);
+ } else {
+ data->count++;
+ }
+ free(loc);
+ return data->data;
+}
+
+void smpi_shared_free(void *ptr)
+{
+ shared_data_t *data = (shared_data_t *) ((int *) ptr - 1);
+ char *loc;
+
+ if (!allocs) {
+ XBT_WARN("Cannot free: nothing was allocated");
+ return;
+ }
+ loc = xbt_dict_get_key(allocs, data);
+ if (!loc) {
+ XBT_WARN("Cannot free: %p was not shared-allocated by SMPI", ptr);
+ return;
+ }
+ data->count--;
+ if (data->count <= 0) {
+ xbt_dict_remove(allocs, loc);
+ }
+}
+
+int smpi_shared_known_call(const char* func, const char* input) {
+ char* loc = bprintf("%s:%s", func, input);
+ xbt_ex_t ex;
+ int known;
+
+ if(!calls) {
+ calls = xbt_dict_new();
+ }
+ TRY {
+ xbt_dict_get(calls, loc); /* Succeed or throw */
+ known = 1;
+ }
+ CATCH(ex) {
+ if(ex.category == not_found_error) {
+ known = 0;
+ xbt_ex_free(ex);
+ } else {
+ RETHROW;
+ }
+ }
+ free(loc);
+ return known;
+}
+
+void* smpi_shared_get_call(const char* func, const char* input) {
+ char* loc = bprintf("%s:%s", func, input);
+ void* data;
+
+ if(!calls) {
+ calls = xbt_dict_new();
+ }
+ data = xbt_dict_get(calls, loc);
+ free(loc);
+ return data;
+}
- SIMIX_mutex_unlock(smpi_global->timer_mutex);
+void* smpi_shared_set_call(const char* func, const char* input, void* data) {
+ char* loc = bprintf("%s:%s", func, input);
- return;
+ if(!calls) {
+ calls = xbt_dict_new();
+ }
+ xbt_dict_set(calls, loc, data, NULL);
+ free(loc);
+ return data;
}
