-/* $Id$ */
-
-/* Copyright (c) 2004 Arnaud Legrand. All rights reserved. */
+/* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011. 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 <ctype.h>
-
#include "surf_private.h"
#include "xbt/module.h"
+#include "mc/mc.h"
+#include "simix/smx_host_private.h"
+#include "surf/surf_resource.h"
+#include "xbt/xbt_os_thread.h"
+#include "simgrid/sg_config.h"
+
+#include <ctype.h>
+XBT_LOG_NEW_CATEGORY(surf, "All SURF categories");
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_kernel, surf,
"Logging specific to SURF (kernel)");
-int use_sdp_solver = 0;
-int use_lagrange_solver = 0;
-
-/* Additional declarations for Windows potability. */
+/* Additional declarations for Windows portability. */
#ifndef MAX_DRIVE
#define MAX_DRIVE 26
#endif
-#ifdef _WIN32
+#ifdef _XBT_WIN32
#include <windows.h>
static const char *disk_drives_letter_table[MAX_DRIVE] = {
"A:\\",
"Y:\\",
"Z:\\"
};
-#endif /* #ifdef _WIN32 */
+#endif /* #ifdef _XBT_WIN32 */
/*
* Returns the initial path. On Windows the initial path is
const char *__surf_get_initial_path(void)
{
-#ifdef _WIN32
+#ifdef _XBT_WIN32
unsigned i;
char current_directory[MAX_PATH + 1] = { 0 };
unsigned int len = GetCurrentDirectory(MAX_PATH + 1, current_directory);
*/
int __surf_is_absolute_file_path(const char *file_path)
{
-#ifdef _WIN32
+#ifdef _XBT_WIN32
WIN32_FIND_DATA wfd = { 0 };
HANDLE hFile = FindFirstFile(file_path, &wfd);
#endif
}
-static double NOW = 0;
+double NOW = 0;
xbt_dynar_t model_list = NULL;
tmgr_history_t history = NULL;
/* Don't forget to update the option description in smx_config when you change this */
s_surf_model_description_t surf_network_model_description[] = {
- {"Constant", NULL, surf_network_model_init_Constant},
- {"CM02", NULL, surf_network_model_init_CM02},
- {"LegrandVelho", NULL, surf_network_model_init_LegrandVelho},
+ {"LV08",
+ "Realistic network analytic model (slow-start modeled by multiplying latency by 10.4, bandwidth by .92; bottleneck sharing uses a payload of S=8775 for evaluating RTT). ",
+ surf_network_model_init_LegrandVelho},
+ {"Constant",
+ "Simplistic network model where all communication take a constant time (one second). This model provides the lowest realism, but is (marginally) faster.",
+ surf_network_model_init_Constant},
+ {"SMPI",
+ "Realistic network model specifically tailored for HPC settings (accurate modeling of slow start with correction factors on three intervals: < 1KiB, < 64 KiB, >= 64 KiB)",
+ surf_network_model_init_SMPI},
+ {"CM02",
+ "Legacy network analytic model (Very similar to LV08, but without corrective factors. The timings of small messages are thus poorly modeled).",
+ surf_network_model_init_CM02},
#ifdef HAVE_GTNETS
- {"GTNets", NULL, surf_network_model_init_GTNETS},
+ {"GTNets",
+ "Network pseudo-model using the GTNets simulator instead of an analytic model",
+ surf_network_model_init_GTNETS},
#endif
-#ifdef HAVE_SDP
- {"SDP", NULL, surf_network_model_init_SDP},
+#ifdef HAVE_NS3
+ {"NS3",
+ "Network pseudo-model using the NS3 tcp model instead of an analytic model",
+ surf_network_model_init_NS3},
#endif
- {"Reno", NULL, surf_network_model_init_Reno},
- {"Reno2", NULL, surf_network_model_init_Reno2},
- {"Vegas", NULL, surf_network_model_init_Vegas},
- {NULL, NULL, NULL} /* this array must be NULL terminated */
+ {"Reno",
+ "Model from Steven H. Low using lagrange_solve instead of lmm_solve (experts only; check the code for more info).",
+ surf_network_model_init_Reno},
+ {"Reno2",
+ "Model from Steven H. Low using lagrange_solve instead of lmm_solve (experts only; check the code for more info).",
+ surf_network_model_init_Reno2},
+ {"Vegas",
+ "Model from Steven H. Low using lagrange_solve instead of lmm_solve (experts only; check the code for more info).",
+ surf_network_model_init_Vegas},
+ {NULL, NULL, NULL} /* this array must be NULL terminated */
};
s_surf_model_description_t surf_cpu_model_description[] = {
- {"Cas01", NULL, surf_cpu_model_init_Cas01},
- {NULL, NULL, NULL} /* this array must be NULL terminated */
+ {"Cas01",
+ "Simplistic CPU model (time=size/power).",
+ surf_cpu_model_init_Cas01},
+ {NULL, NULL, NULL} /* this array must be NULL terminated */
};
s_surf_model_description_t surf_workstation_model_description[] = {
- {"CLM03", NULL, surf_workstation_model_init_CLM03, create_workstations},
- {"compound", NULL, surf_workstation_model_init_compound,
- create_workstations},
- {"ptask_L07", NULL, surf_workstation_model_init_ptask_L07, NULL},
- {NULL, NULL, NULL} /* this array must be NULL terminated */
+ {"default",
+ "Default workstation model. Currently, CPU:Cas01 and network:LV08 (with cross traffic enabled)",
+ surf_workstation_model_init_current_default},
+ {"compound",
+ "Workstation model that is automatically chosen if you change the network and CPU models",
+ surf_workstation_model_init_compound},
+ {"ptask_L07", "Workstation model somehow similar to Cas01+CM02 but allowing parallel tasks",
+ surf_workstation_model_init_ptask_L07},
+ {NULL, NULL, NULL} /* this array must be NULL terminated */
+};
+
+s_surf_model_description_t surf_optimization_mode_description[] = {
+ {"Lazy",
+ "Lazy action management (partial invalidation in lmm + heap in action remaining).",
+ NULL},
+ {"TI",
+ "Trace integration. Highly optimized mode when using availability traces (only available for the Cas01 CPU model for now).",
+ NULL},
+ {"Full",
+ "Full update of remaining and variables. Slow but may be useful when debugging.",
+ NULL},
+ {NULL, NULL, NULL} /* this array must be NULL terminated */
+};
+
+s_surf_model_description_t surf_storage_model_description[] = {
+ {"default",
+ "Simplistic storage model.",
+ surf_storage_model_init_default},
+ {NULL, NULL, NULL} /* this array must be NULL terminated */
+};
+
+/* ********************************************************************* */
+/* TUTORIAL: New model */
+s_surf_model_description_t surf_new_model_description[] = {
+ {"default",
+ "Tutorial model.",
+ surf_new_model_init_default},
+ {NULL, NULL, NULL} /* this array must be NULL terminated */
};
+/* ********************************************************************* */
+
+#ifdef CONTEXT_THREADS
+static xbt_parmap_t surf_parmap = NULL; /* parallel map on models */
+#endif
-void update_model_description(s_surf_model_description_t * table,
- const char *name, surf_model_t model)
+static int surf_nthreads = 1; /* number of threads of the parmap (1 means no parallelism) */
+static double *surf_mins = NULL; /* return value of share_resources for each model */
+static int surf_min_index; /* current index in surf_mins */
+static double min; /* duration determined by surf_solve */
+
+static void surf_share_resources(surf_model_t model);
+static void surf_update_actions_state(surf_model_t model);
+
+/** Displays the long description of all registered models, and quit */
+void model_help(const char *category, s_surf_model_description_t * table)
{
- int i = find_model_description(table, name);
- table[i].model = model;
+ int i;
+ printf("Long description of the %s models accepted by this simulator:\n",
+ category);
+ for (i = 0; table[i].name; i++)
+ printf(" %s: %s\n", table[i].name, table[i].description);
}
int find_model_description(s_surf_model_description_t * table,
name_list = strdup(table[0].name);
for (i = 1; table[i].name; i++) {
name_list =
- xbt_realloc(name_list, strlen(name_list) + strlen(table[i].name) + 2);
+ xbt_realloc(name_list,
+ strlen(name_list) + strlen(table[i].name) + 3);
strcat(name_list, ", ");
strcat(name_list, table[i].name);
}
- xbt_assert2(0, "Model '%s' is invalid! Valid models are: %s.", name,
- name_list);
+ xbt_die("Model '%s' is invalid! Valid models are: %s.", name, name_list);
+ return -1;
}
double generic_maxmin_share_resources(xbt_swag_t running_actions,
double value = -1;
#define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + (offset))))
- xbt_assert0(solve, "Give me a real solver function!");
solve(sys);
xbt_swag_foreach(action, running_actions) {
for (action = xbt_swag_getNext(action, running_actions->offset);
- action; action = xbt_swag_getNext(action, running_actions->offset)) {
+ action;
+ action = xbt_swag_getNext(action, running_actions->offset)) {
value = lmm_variable_getvalue(VARIABLE(action));
if (value > 0) {
if (action->remains > 0)
value = 0.0;
if (value < min) {
min = value;
- DEBUG2("Updating min (value) with %p: %f", action, min);
+ XBT_DEBUG("Updating min (value) with %p: %f", action, min);
}
}
if ((action->max_duration >= 0) && (action->max_duration < min)) {
min = action->max_duration;
- DEBUG2("Updating min (duration) with %p: %f", action, min);
+ XBT_DEBUG("Updating min (duration) with %p: %f", action, min);
}
}
- DEBUG1("min value : %f", min);
+ XBT_DEBUG("min value : %f", min);
#undef VARIABLE
return min;
}
+double generic_share_resources_lazy(double now, surf_model_t model)
+{
+ surf_action_lmm_t action = NULL;
+ double min = -1;
+ double value;
-XBT_LOG_EXTERNAL_CATEGORY(surf_cpu);
-XBT_LOG_EXTERNAL_CATEGORY(surf_kernel);
-XBT_LOG_EXTERNAL_CATEGORY(surf_lagrange);
-XBT_LOG_EXTERNAL_CATEGORY(surf_lagrange_dichotomy);
-XBT_LOG_EXTERNAL_CATEGORY(surf_maxmin);
-XBT_LOG_EXTERNAL_CATEGORY(surf_network);
-XBT_LOG_EXTERNAL_CATEGORY(surf_trace);
-XBT_LOG_EXTERNAL_CATEGORY(surf_parse);
-XBT_LOG_EXTERNAL_CATEGORY(surf_timer);
-XBT_LOG_EXTERNAL_CATEGORY(surf_workstation);
-XBT_LOG_EXTERNAL_CATEGORY(surf_config);
+ XBT_DEBUG
+ ("Before share resources, the size of modified actions set is %d",
+ xbt_swag_size(model->model_private->modified_set));
+ lmm_solve(model->model_private->maxmin_system);
-#ifdef HAVE_SDP
-XBT_LOG_EXTERNAL_CATEGORY(surf_sdp_out);
-XBT_LOG_EXTERNAL_CATEGORY(surf_sdp);
-#endif
-#ifdef HAVE_GTNETS
-XBT_LOG_EXTERNAL_CATEGORY(surf_network_gtnets);
-#endif
+ XBT_DEBUG
+ ("After share resources, The size of modified actions set is %d",
+ xbt_swag_size(model->model_private->modified_set));
+
+ while((action = xbt_swag_extract(model->model_private->modified_set))) {
+ int max_dur_flag = 0;
+
+ if (action->generic_action.state_set !=
+ model->states.running_action_set)
+ continue;
+
+ /* bogus priority, skip it */
+ if (action->generic_action.priority <= 0)
+ continue;
+
+ generic_update_action_remaining_lazy(action,now);
+
+ min = -1;
+ value = lmm_variable_getvalue(action->variable);
+ if (value > 0) {
+ if (action->generic_action.remains > 0) {
+ value = action->generic_action.remains / value;
+ min = now + value;
+ } else {
+ value = 0.0;
+ min = now;
+ }
+ }
+
+ if ((action->generic_action.max_duration != NO_MAX_DURATION)
+ && (min == -1
+ || action->generic_action.start +
+ action->generic_action.max_duration < min)) {
+ min = action->generic_action.start +
+ action->generic_action.max_duration;
+ max_dur_flag = 1;
+ }
+
+ XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
+ action->generic_action.start, now + value,
+ action->generic_action.max_duration);
+
+ if (min != -1) {
+ surf_action_lmm_heap_remove(model->model_private->action_heap,action);
+ surf_action_lmm_heap_insert(model->model_private->action_heap,action, min, max_dur_flag ? MAX_DURATION : NORMAL);
+ XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
+ now);
+ } else DIE_IMPOSSIBLE;
+ }
+
+ //hereafter must have already the min value for this resource model
+ if (xbt_heap_size(model->model_private->action_heap) > 0)
+ min = xbt_heap_maxkey(model->model_private->action_heap) - now;
+ else
+ min = -1;
+
+ XBT_DEBUG("The minimum with the HEAP %lf", min);
+
+ return min;
+}
+static XBT_INLINE void routing_asr_host_free(void *p)
+{
+ sg_routing_edge_t elm = p;
+ free(elm->name);
+ xbt_free(elm);
+}
+
+static XBT_INLINE void routing_asr_prop_free(void *p)
+{
+ xbt_dict_t elm = p;
+ xbt_dict_free(&elm);
+}
+
+void sg_version(int *ver_major,int *ver_minor,int *ver_patch) {
+ *ver_major = SIMGRID_VERSION_MAJOR;
+ *ver_minor = SIMGRID_VERSION_MINOR;
+ *ver_patch = SIMGRID_VERSION_PATCH;
+}
void surf_init(int *argc, char **argv)
{
- /* Connect our log channels: that must be done manually under windows */
- XBT_LOG_CONNECT(surf_cpu, surf);
- XBT_LOG_CONNECT(surf_kernel, surf);
- XBT_LOG_CONNECT(surf_lagrange, surf);
- XBT_LOG_CONNECT(surf_lagrange_dichotomy, surf_lagrange);
- XBT_LOG_CONNECT(surf_maxmin, surf);
- XBT_LOG_CONNECT(surf_network, surf);
- XBT_LOG_CONNECT(surf_trace, surf);
- XBT_LOG_CONNECT(surf_parse, surf);
- XBT_LOG_CONNECT(surf_timer, surf);
- XBT_LOG_CONNECT(surf_workstation, surf);
- XBT_LOG_CONNECT(surf_config, surf);
-
-#ifdef HAVE_SDP
- XBT_LOG_CONNECT(surf_sdp_out, surf);
- XBT_LOG_CONNECT(surf_sdp, surf);
-#endif
-#ifdef HAVE_GTNETS
- XBT_LOG_CONNECT(surf_network_gtnets, surf);
-#endif
+ XBT_DEBUG("Create all Libs");
+ host_lib = xbt_lib_new();
+ link_lib = xbt_lib_new();
+ as_router_lib = xbt_lib_new();
+ storage_lib = xbt_lib_new();
+ storage_type_lib = xbt_lib_new();
+ watched_hosts_lib = xbt_dict_new();
+
+ XBT_DEBUG("Add routing levels");
+ ROUTING_HOST_LEVEL = xbt_lib_add_level(host_lib,routing_asr_host_free);
+ ROUTING_ASR_LEVEL = xbt_lib_add_level(as_router_lib,routing_asr_host_free);
+ ROUTING_PROP_ASR_LEVEL = xbt_lib_add_level(as_router_lib,routing_asr_prop_free);
+
+ XBT_DEBUG("Add SURF levels");
+ SURF_CPU_LEVEL = xbt_lib_add_level(host_lib,surf_resource_free);
+ SURF_WKS_LEVEL = xbt_lib_add_level(host_lib,surf_resource_free);
+ SURF_LINK_LEVEL = xbt_lib_add_level(link_lib,surf_resource_free);
xbt_init(argc, argv);
if (!model_list)
if (!history)
history = tmgr_history_new();
- surf_config_init(argc, argv);
+#ifdef HAVE_TRACING
+ TRACE_add_start_function(TRACE_surf_alloc);
+ TRACE_add_end_function(TRACE_surf_release);
+#endif
+
+ sg_config_init(argc, argv);
+
+ surf_action_init();
+ if (MC_is_active())
+ MC_memory_init();
}
-static char *path_name = NULL;
+#ifdef _XBT_WIN32
+# define FILE_DELIM "\\"
+#else
+# define FILE_DELIM "/" /* FIXME: move to better location */
+#endif
+
FILE *surf_fopen(const char *name, const char *mode)
{
- unsigned int iter;
- char *path = NULL;
+ unsigned int cpt;
+ char *path_elm = NULL;
+ char *buff;
FILE *file = NULL;
- unsigned int path_name_len = 0; /* don't count '\0' */
- xbt_assert0(name, "Need a non-NULL file name");
+ xbt_assert(name);
- xbt_assert0(surf_path,
- "surf_init has to be called before using surf_fopen");
-
- if (__surf_is_absolute_file_path(name)) { /* don't mess with absolute file names */
+ if (__surf_is_absolute_file_path(name)) /* don't mess with absolute file names */
return fopen(name, mode);
- } else { /* search relative files in the path */
-
- if (!path_name) {
- path_name_len = strlen(name);
- path_name = xbt_new0(char, path_name_len + 1);
- }
+ /* search relative files in the path */
+ xbt_dynar_foreach(surf_path, cpt, path_elm) {
+ buff = bprintf("%s" FILE_DELIM "%s", path_elm, name);
+ file = fopen(buff, mode);
+ free(buff);
- xbt_dynar_foreach(surf_path, iter, path) {
- if (path_name_len < strlen(path) + strlen(name) + 1) {
- path_name_len = strlen(path) + strlen(name) + 1; /* plus '/' */
- path_name = xbt_realloc(path_name, path_name_len + 1);
- }
-#ifdef WIN32
- sprintf(path_name, "%s\\%s", path, name);
-#else
- sprintf(path_name, "%s/%s", path, name);
-#endif
- file = fopen(path_name, mode);
- if (file)
- return file;
- }
+ if (file)
+ return file;
}
- return file;
+ return NULL;
}
void surf_exit(void)
unsigned int iter;
surf_model_t model = NULL;
- surf_config_finalize();
+ sg_config_finalize();
- xbt_dynar_foreach(model_list, iter, model) {
- model->model_private->finalize();
- }
+ xbt_dynar_foreach(model_list, iter, model)
+ model->model_private->finalize();
+ xbt_dynar_free(&model_list);
+ routing_exit();
if (maxmin_system) {
lmm_system_free(maxmin_system);
tmgr_history_free(history);
history = NULL;
}
- if (model_list)
- xbt_dynar_free(&model_list);
+ surf_action_exit();
+
+#ifdef CONTEXT_THREADS
+ xbt_parmap_destroy(surf_parmap);
+ xbt_free(surf_mins);
+ surf_mins = NULL;
+#endif
+
+ xbt_dynar_free(&surf_path);
- if (surf_path)
- xbt_dynar_free(&surf_path);
+ xbt_lib_free(&host_lib);
+ xbt_lib_free(&link_lib);
+ xbt_lib_free(&as_router_lib);
+ xbt_lib_free(&storage_lib);
+ xbt_lib_free(&storage_type_lib);
+
+ xbt_dict_free(&watched_hosts_lib);
tmgr_finalize();
surf_parse_lex_destroy();
- if (path_name) {
- free(path_name);
- path_name = NULL;
- }
surf_parse_free_callbacks();
- xbt_dict_free(&route_table);
+
NOW = 0; /* Just in case the user plans to restart the simulation afterward */
- xbt_exit();
}
void surf_presolve(void)
surf_model_t model = NULL;
unsigned int iter;
- DEBUG0
- ("First Run! Let's \"purge\" events and put models in the right state");
+ XBT_DEBUG
+ ("First Run! Let's \"purge\" events and put models in the right state");
while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
if (next_event_date > NOW)
break;
while ((event =
tmgr_history_get_next_event_leq(history, next_event_date,
- &value, (void **) &resource))) {
- resource->model->model_private->update_resource_state(resource,
- event, value,
- NOW);
+ &value,
+ (void **) &resource))) {
+ if (value >= 0){
+ resource->model->model_private->update_resource_state(resource,
+ event, value,
+ NOW);
+ }
}
}
- xbt_dynar_foreach(model_list, iter, model) {
- model->model_private->update_actions_state(NOW, 0.0);
- }
+ xbt_dynar_foreach(model_list, iter, model)
+ model->model_private->update_actions_state(NOW, 0.0);
}
-double surf_solve(void)
+double surf_solve(double max_date)
{
- double min = -1.0;
+ min = -1.0; /* duration */
double next_event_date = -1.0;
double model_next_action_end = -1.0;
double value = -1.0;
tmgr_trace_event_t event = NULL;
unsigned int iter;
- min = -1.0;
-
- DEBUG0("Looking for next action end");
- xbt_dynar_foreach(model_list, iter, model) {
- DEBUG1("Running for Resource [%s]", model->name);
- model_next_action_end = model->model_private->share_resources(NOW);
- DEBUG2("Resource [%s] : next action end = %f",
- model->name, model_next_action_end);
- if (((min < 0.0) || (model_next_action_end < min))
- && (model_next_action_end >= 0.0))
- min = model_next_action_end;
+ if (max_date != -1.0 && max_date != NOW) {
+ min = max_date - NOW;
}
- DEBUG1("Next action end : %f", min);
- if (min < 0.0)
- return -1.0;
+ XBT_DEBUG("Looking for next action end for all models except NS3");
- DEBUG0("Looking for next event");
- while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
- DEBUG1("Next event : %f", next_event_date);
- if (next_event_date > NOW + min)
+ if (surf_mins == NULL) {
+ surf_mins = xbt_new(double, xbt_dynar_length(model_list));
+ }
+ surf_min_index = 0;
+
+
+ if (surf_get_nthreads() > 1) {
+ /* parallel version */
+#ifdef CONTEXT_THREADS
+ xbt_parmap_apply(surf_parmap, (void_f_pvoid_t) surf_share_resources, model_list);
+#else
+ xbt_die("Asked to run in parallel, but no thread at hand...");
+#endif
+ }
+ else {
+ /* sequential version */
+ xbt_dynar_foreach(model_list, iter, model) {
+ surf_share_resources(model);
+ }
+ }
+
+ unsigned i;
+ for (i = 0; i < xbt_dynar_length(model_list); i++) {
+ if ((min < 0.0 || surf_mins[i] < min)
+ && surf_mins[i] >= 0.0) {
+ min = surf_mins[i];
+ }
+ }
+
+ XBT_DEBUG("Min for resources (remember that NS3 don't update that value) : %f", min);
+
+ XBT_DEBUG("Looking for next trace event");
+
+ do {
+ XBT_DEBUG("Next TRACE event : %f", next_event_date);
+
+ next_event_date = tmgr_history_next_date(history);
+
+ if(surf_network_model->name && !strcmp(surf_network_model->name,"network NS3")){
+ if(next_event_date!=-1.0 && min!=-1.0) {
+ min = MIN(next_event_date - NOW, min);
+ } else{
+ min = MAX(next_event_date - NOW, min);
+ }
+
+ XBT_DEBUG("Run for network at most %f", min);
+ // run until min or next flow
+ model_next_action_end = surf_network_model->model_private->share_resources(min);
+
+ XBT_DEBUG("Min for network : %f", model_next_action_end);
+ if(model_next_action_end>=0.0)
+ min = model_next_action_end;
+ }
+
+ if (next_event_date < 0.0) {
+ XBT_DEBUG("no next TRACE event. Stop searching for it");
break;
- DEBUG0("Updating models");
+ }
+
+ if ((min == -1.0) || (next_event_date > NOW + min)) break;
+
+ XBT_DEBUG("Updating models (min = %g, NOW = %g, next_event_date = %g)",min, NOW, next_event_date);
while ((event =
tmgr_history_get_next_event_leq(history, next_event_date,
- &value, (void **) &resource))) {
+ &value,
+ (void **) &resource))) {
if (resource->model->model_private->resource_used(resource)) {
min = next_event_date - NOW;
- DEBUG1
- ("This event will modify model state. Next event set to %f", min);
+ XBT_DEBUG
+ ("This event will modify model state. Next event set to %f",
+ min);
}
/* update state of model_obj according to new value. Does not touch lmm.
It will be modified if needed when updating actions */
+ XBT_DEBUG("Calling update_resource_state for resource %s with min %lf",
+ resource->model->name, min);
resource->model->model_private->update_resource_state(resource,
event, value,
NOW + min);
}
+ } while (1);
+
+ /* FIXME: Moved this test to here to avoid stopping simulation if there are actions running on cpus and all cpus are with availability = 0.
+ * This may cause an infinite loop if one cpu has a trace with periodicity = 0 and the other a trace with periodicity > 0.
+ * The options are: all traces with same periodicity(0 or >0) or we need to change the way how the events are managed */
+ if (min == -1.0) {
+ XBT_DEBUG("No next event at all. Bail out now.");
+ return -1.0;
}
- DEBUG1("Duration set to %f", min);
+ XBT_DEBUG("Duration set to %f", min);
NOW = NOW + min;
- xbt_dynar_foreach(model_list, iter, model) {
- model->model_private->update_actions_state(NOW, min);
+ if (surf_get_nthreads() > 1) {
+ /* parallel version */
+#ifdef CONTEXT_THREADS
+ xbt_parmap_apply(surf_parmap, (void_f_pvoid_t) surf_update_actions_state, model_list);
+#endif
+ }
+ else {
+ /* sequential version */
+ xbt_dynar_foreach(model_list, iter, model) {
+ surf_update_actions_state(model);
+ }
}
+#ifdef HAVE_TRACING
+ TRACE_paje_dump_buffer (0);
+#endif
+
return min;
}
-double surf_get_clock(void)
+XBT_INLINE double surf_get_clock(void)
{
return NOW;
}
+
+static void surf_share_resources(surf_model_t model)
+{
+ double next_action_end = -1.0;
+ int i = __sync_fetch_and_add(&surf_min_index, 1);
+ if (strcmp(model->name,"network NS3")) {
+ XBT_DEBUG("Running for Resource [%s]", model->name);
+ next_action_end = model->model_private->share_resources(NOW);
+ XBT_DEBUG("Resource [%s] : next action end = %f",
+ model->name, next_action_end);
+ }
+ surf_mins[i] = next_action_end;
+}
+
+static void surf_update_actions_state(surf_model_t model)
+{
+ model->model_private->update_actions_state(NOW, min);
+}
+
+/**
+ * \brief Returns the number of parallel threads used to update the models.
+ * \return the number of threads (1 means no parallelism)
+ */
+int surf_get_nthreads(void) {
+ return surf_nthreads;
+}
+
+/**
+ * \brief Sets the number of parallel threads used to update the models.
+ *
+ * A value of 1 means no parallelism.
+ *
+ * \param nb_threads the number of threads to use
+ */
+void surf_set_nthreads(int nthreads) {
+
+ if (nthreads<=0) {
+ nthreads = xbt_os_get_numcores();
+ XBT_INFO("Auto-setting surf/nthreads to %d",nthreads);
+ }
+
+#ifdef CONTEXT_THREADS
+ xbt_parmap_destroy(surf_parmap);
+ surf_parmap = NULL;
+#endif
+
+ if (nthreads > 1) {
+#ifdef CONTEXT_THREADS
+ surf_parmap = xbt_parmap_new(nthreads, XBT_PARMAP_DEFAULT);
+#else
+ THROWF(arg_error, 0, "Cannot activate parallel threads in Surf: your architecture does not support threads");
+#endif
+ }
+
+ surf_nthreads = nthreads;
+}
+
+/* This function is a pimple that we ought to fix. But it won't be easy.
+ *
+ * The surf_solve() function does properly return the set of actions that changed.
+ * Instead, each model change a global data, and then the caller of surf_solve must
+ * pick into these sets of action_failed and action_done.
+ *
+ * This was not clean but ok as long as we didn't had to restart the processes when the resource comes back up.
+ * We worked by putting sentinel actions on every resources we are interested in,
+ * so that surf informs us if/when the corresponding resource fails.
+ *
+ * But this does not work to get Simix informed of when a resource comes back up, and this is where this pimple comes.
+ * We have a set of resources that are currently down and for which simix needs to know when it comes back up.
+ * And the current function is called *at every simulation step* to sweep over that set, searching for a resource
+ * that was turned back up in the meanwhile. This is UGLY and slow.
+ *
+ * The proper solution would be to not rely on globals for the action_failed and action_done swags.
+ * They must be passed as parameter by the caller (the handling of these actions in simix may let you
+ * think that these two sets can be merged, but their handling in SimDag induce the contrary unless this
+ * simdag code can check by itself whether the action is done of failed -- seems very doable, but yet more
+ * cleanup to do).
+ *
+ * Once surf_solve() is passed the set of actions that changed, you want to add a new set of resources back up
+ * as parameter to this function. You also want to add a boolean field "restart_watched" to each resource, and
+ * make sure that whenever a resource with this field enabled comes back up, it's added to that set so that Simix
+ * sees it and react accordingly. This would kill that need for surf to call simix.
+ *
+ */
+void surf_watched_hosts(void)
+{
+ char *key;
+ void *host;
+ xbt_dict_cursor_t cursor;
+
+ XBT_DEBUG("Check for host SURF_RESOURCE_ON on watched_hosts_lib");
+ xbt_dict_foreach(watched_hosts_lib,cursor,key,host)
+ {
+ if(SIMIX_host_get_state(host) == SURF_RESOURCE_ON){
+ XBT_INFO("Restart processes on host: %s",SIMIX_host_get_name(host));
+ SIMIX_host_autorestart(host);
+ xbt_dict_remove(watched_hosts_lib,key);
+ }
+ else
+ XBT_DEBUG("See SURF_RESOURCE_OFF on host: %s",key);
+ }
+}
