X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/c9915805944cfa61187e82d2139703b99716fbf9..9a10d9dc4c75ef2443ecf56b1ef7cb0720d061b9:/src/simdag/sd_dotloader.c

diff --git a/src/simdag/sd_dotloader.c b/src/simdag/sd_dotloader.c
index 13e1b7c949..60b9f7517f 100644
--- a/src/simdag/sd_dotloader.c
+++ b/src/simdag/sd_dotloader.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2009-2013. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
@@ -8,245 +8,580 @@
 #include "simdag/simdag.h"
 #include "xbt/misc.h"
 #include "xbt/log.h"
+#include <stdbool.h>
+#include <string.h>
+#include <libgen.h>
 
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_dotparse, sd,"Parsing DOT files");
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_dotparse, sd, "Parsing DOT files");
 
 #undef CLEANUP
+
+#ifdef HAVE_CGRAPH_H
 #include <graphviz/cgraph.h>
+#elif HAVE_AGRAPH_H
+#include <graphviz/agraph.h>
+#define agnxtnode(dot, node)    agnxtnode(node)
+#define agfstin(dot, node)      agfstin(node)
+#define agnxtin(dot, edge)      agnxtin(edge)
+#define agfstout(dot, node)     agfstout(node)
+#define agnxtout(dot, edge)     agnxtout(edge)
+#endif
+
+typedef enum {
+  sequential =0,
+  parallel
+} seq_par_t;
 
-static double parse_double(const char *string) {
-    if (string == NULL) return -10;
-    int ret = 0;
-    double value;
+void dot_add_task(Agnode_t * dag_node);
+void dot_add_parallel_task(Agnode_t * dag_node);
+void dot_add_input_dependencies(SD_task_t current_job, Agedge_t * edge,
+                                seq_par_t seq_or_par);
+void dot_add_output_dependencies(SD_task_t current_job, Agedge_t * edge,
+                                 seq_par_t seq_or_par);
+xbt_dynar_t SD_dotload_generic(const char * filename);
 
-    ret = sscanf(string, "%lg", &value);
-    if (ret != 1)
-        WARN1("%s is not a double", string);
-    return value;
+static double dot_parse_double(const char *string)
+{
+  if (string == NULL)
+    return -1;
+  double value = -1;
+  char *err;
+
+  //ret = sscanf(string, "%lg", &value);
+  errno = 0;
+  value = strtod(string,&err);
+  if(errno)
+  {
+    XBT_WARN("Failed to convert string to double: %s\n",strerror(errno));
+    return -1;
+  }
+  return value;
 }
-static int parse_int(const char *string) {
-    if (string == NULL) return -10;
-    int ret = 0;
-    int value;
-
-    ret = sscanf(string, "%d", &value);
-    if (ret != 1)
-        WARN1("%s is not an integer", string);
-    return value;
+
+
+static int dot_parse_int(const char *string)
+{
+  if (string == NULL)
+    return -10;
+  int ret = 0;
+  int value = -1;
+
+  ret = sscanf(string, "%d", &value);
+  if (ret != 1)
+    XBT_WARN("%s is not an integer", string);
+  return value;
 }
 
 static xbt_dynar_t result;
 static xbt_dict_t jobs;
 static xbt_dict_t files;
-static SD_task_t root_task,end_task;
-static Agraph_t * dag_dot;
-
-static void dump_res() {
-    unsigned int cursor;
-    SD_task_t task;
-    xbt_dynar_foreach(result,cursor,task) {
-        INFO1("Task %d",cursor);
-        SD_task_dump(task);
-    }
+static xbt_dict_t computers;
+static SD_task_t root_task, end_task;
+static Agraph_t *dag_dot;
+static bool schedule = true;
+
+static void dump_res()
+{
+  unsigned int cursor;
+  SD_task_t task;
+  xbt_dynar_foreach(result, cursor, task) {
+    XBT_INFO("Task %d", cursor);
+    SD_task_dump(task);
+  }
+}
+
+
+static void dot_task_free(void *task)
+{
+  SD_task_t t = task;
+  SD_task_destroy(t);
+}
+
+static void dot_task_p_free(void *task)
+{
+  SD_task_t *t = task;
+  SD_task_destroy(*t);
 }
 
-static void dot_task_free(void*task){
-    SD_task_t t=task;
-    SD_task_destroy(t);
+static void TRACE_sd_dotloader (SD_task_t task, const char *category)
+{
+  if (category){
+    if (strlen (category) != 0){
+      TRACE_category (category);
+      SD_task_set_category (task, category);
+    }
+  }
 }
-void Start_dot_job(Agnode_t *dag_node) ;
-void input_edge(SD_task_t current_job, Agedge_t *edge) ;
-void output_edge(SD_task_t current_job, Agedge_t *edge) ;
 
-/** @brief loads a DAX file describing a DAG
+/** @brief loads a DOT file describing a DAG
  * 
- * See https://confluence.pegasus.isi.edu/display/pegasus/WorkflowGenerator
+ * See http://www.graphviz.org/doc/info/lang.html
  * for more details.
+ * To obtain information about transfers and tasks, two attributes are
+ * required : size on task (execution time in Flop) and size on edge
+ * (the amount of data transfer in bit).
+ * if they aren't here, there choose to be equal to zero.
  */
-xbt_dynar_t SD_dotload(const char*filename){
-    FILE* in_file = fopen(filename,"r");
-    xbt_assert1(in_file, "Unable to open \"%s\"\n", filename);
-    SD_dotload_FILE(in_file);
-    fclose(in_file);
-    return result;
+xbt_dynar_t SD_dotload(const char *filename)
+{
+  SD_dotload_generic(filename);
+  xbt_dynar_t computer = NULL;
+  xbt_dict_cursor_t dict_cursor;
+  char *computer_name;
+  xbt_dict_foreach(computers,dict_cursor,computer_name,computer){
+    xbt_dynar_free(&computer);
+  }
+  xbt_dict_free(&computers);
+  return result;
 }
 
-xbt_dynar_t SD_dotload_FILE(FILE* in_file){
-    xbt_assert0(in_file, "Unable to use a null file descriptor\n");
-    dag_dot = agread(in_file,NIL(Agdisc_t*));
+xbt_dynar_t SD_dotload_with_sched(const char *filename){
+  SD_dotload_generic(filename);
+
+  if(schedule == true){
+    xbt_dynar_t computer = NULL;
+    xbt_dict_cursor_t dict_cursor;
+    char *computer_name;
+    const SD_workstation_t *workstations = SD_workstation_get_list ();
+    xbt_dict_foreach(computers,dict_cursor,computer_name,computer){
+      int count_computer = dot_parse_int(computer_name);
+      unsigned int count=0;
+      SD_task_t task;
+      SD_task_t task_previous = NULL;
+      xbt_dynar_foreach(computer,count,task){
+        // add dependency between the previous and the task to avoid
+        // parallel execution
+        if(task != NULL ){
+          if(task_previous != NULL &&
+             !SD_task_dependency_exists(task_previous, task))
+            SD_task_dependency_add(NULL, NULL, task_previous, task);
+          SD_task_schedulel(task, 1, workstations[count_computer]);
+          task_previous = task;
+        }
+      }
+      xbt_dynar_free(&computer);
+    }
+    xbt_dict_free(&computers);
+    if(acyclic_graph_detail(result))
+      return result;
+    else
+      XBT_WARN("There is at least one cycle in the provided task graph");
+  }else{
+    XBT_WARN("The scheduling is ignored");
+  }
+  SD_task_t task;
+  unsigned int count;
+  xbt_dynar_t computer = NULL;
+  xbt_dict_cursor_t dict_cursor;
+  char *computer_name;
+  xbt_dict_foreach(computers,dict_cursor,computer_name,computer){
+    xbt_dynar_free(&computer);
+  }
+  xbt_dict_free(&computers);
+  xbt_dynar_foreach(result,count,task){
+     SD_task_destroy(task);
+  }
+  return NULL;
+}
+
+xbt_dynar_t SD_PTG_dotload(const char * filename)
+{
+  xbt_assert(filename, "Unable to use a null file descriptor\n");
+  FILE *in_file = fopen(filename, "r");
+  dag_dot = agread(in_file, NIL(Agdisc_t *));
+
+  result = xbt_dynar_new(sizeof(SD_task_t), dot_task_p_free);
+  files = xbt_dict_new_homogeneous(&dot_task_free);
+  jobs = xbt_dict_new_homogeneous(NULL);
+  computers = xbt_dict_new_homogeneous(NULL);
+  root_task = SD_task_create_comp_par_amdahl("root", NULL, 0., 0.);
+  /* by design the root task is always SCHEDULABLE */
+  __SD_task_set_state(root_task, SD_SCHEDULABLE);
 
-    result = xbt_dynar_new(sizeof(SD_task_t),dot_task_free);
-    files=xbt_dict_new();
-    jobs=xbt_dict_new();
-    root_task = SD_task_create_comp_seq("root",NULL,0);
-    /* by design the root task is always SCHEDULABLE */
-    __SD_task_set_state(root_task, SD_SCHEDULABLE);
+  xbt_dict_set(jobs, "root", root_task, NULL);
+  xbt_dynar_push(result, &root_task);
+  end_task = SD_task_create_comp_par_amdahl("end", NULL, 0., 0.);
+  xbt_dict_set(jobs, "end", end_task, NULL);
 
-    xbt_dynar_push(result,&root_task);
-    end_task = SD_task_create_comp_seq("end",NULL,0);
+  Agnode_t *dag_node = NULL;
+  for (dag_node = agfstnode(dag_dot); dag_node; dag_node = agnxtnode(dag_dot, dag_node)) {
+    dot_add_parallel_task(dag_node);
+  }
+  agclose(dag_dot);
+  xbt_dict_free(&jobs);
 
-    Agnode_t *dag_node   = NULL;
-    for (dag_node = agfstnode(dag_dot); dag_node; dag_node = agnxtnode(dag_dot,dag_node)){	
-        Start_dot_job(dag_node);	
+  /* And now, post-process the files.
+   * We want a file task per pair of computation tasks exchanging the file. Duplicate on need
+   * Files not produced in the system are said to be produced by root task (top of DAG).
+   * Files not consumed in the system are said to be consumed by end task (bottom of DAG).
+   */
+  xbt_dict_cursor_t cursor;
+  SD_task_t file;
+  char *name;
+  xbt_dict_foreach(files, cursor, name, file) {
+    unsigned int cpt1, cpt2;
+    SD_task_t newfile = NULL;
+    SD_dependency_t depbefore, depafter;
+    if (xbt_dynar_is_empty(file->tasks_before)) {
+      xbt_dynar_foreach(file->tasks_after, cpt2, depafter) {
+        SD_task_t newfile =
+            SD_task_create_comm_par_mxn_1d_block(file->name, NULL, file->amount);
+        SD_task_dependency_add(NULL, NULL, root_task, newfile);
+        SD_task_dependency_add(NULL, NULL, newfile, depafter->dst);
+        xbt_dynar_push(result, &newfile);
+      }
+    } else if (xbt_dynar_is_empty(file->tasks_after)) {
+      xbt_dynar_foreach(file->tasks_before, cpt2, depbefore) {
+        SD_task_t newfile =
+            SD_task_create_comm_par_mxn_1d_block(file->name, NULL, file->amount);
+        SD_task_dependency_add(NULL, NULL, depbefore->src, newfile);
+        SD_task_dependency_add(NULL, NULL, newfile, end_task);
+        xbt_dynar_push(result, &newfile);
+      }
+    } else {
+      xbt_dynar_foreach(file->tasks_before, cpt1, depbefore) {
+        xbt_dynar_foreach(file->tasks_after, cpt2, depafter) {
+          if (depbefore->src == depafter->dst) {
+            XBT_WARN
+                ("File %s is produced and consumed by task %s. This loop dependency will prevent the execution of the task.",
+                 file->name, depbefore->src->name);
+          }
+          newfile =
+              SD_task_create_comm_par_mxn_1d_block(file->name, NULL, file->amount);
+          SD_task_dependency_add(NULL, NULL, depbefore->src, newfile);
+          SD_task_dependency_add(NULL, NULL, newfile, depafter->dst);
+          xbt_dynar_push(result, &newfile);
+        }
+      }
     }
-    agclose(dag_dot);
-    xbt_dict_free(&jobs);
-
-    /* And now, post-process the files.
-     * We want a file task per pair of computation tasks exchanging the file. Duplicate on need
-     * Files not produced in the system are said to be produced by root task (top of DAG).
-     * Files not consumed in the system are said to be consumed by end task (bottom of DAG).
-     */
-    xbt_dict_cursor_t cursor;
-    SD_task_t file;
-    char *name;
-    xbt_dict_foreach(files,cursor,name,file) {
-        unsigned int cpt1,cpt2;
-        SD_task_t newfile = NULL;
-        SD_dependency_t depbefore,depafter;
-        if (xbt_dynar_length(file->tasks_before) == 0) {
-            xbt_dynar_foreach(file->tasks_after,cpt2,depafter) {
-                SD_task_t newfile = SD_task_create_comm_e2e(file->name,NULL,file->amount);
-                SD_task_dependency_add(NULL,NULL,root_task,newfile);
-                SD_task_dependency_add(NULL,NULL,newfile,depafter->dst);
-                xbt_dynar_push(result,&newfile);
-            }
-        } else if (xbt_dynar_length(file->tasks_after) == 0) {
-            xbt_dynar_foreach(file->tasks_before,cpt2,depbefore) {
-                SD_task_t newfile = SD_task_create_comm_e2e(file->name,NULL,file->amount);
-                SD_task_dependency_add(NULL,NULL,depbefore->src,newfile);
-                SD_task_dependency_add(NULL,NULL,newfile,end_task);
-                xbt_dynar_push(result,&newfile);
-            }
-        } else {
-            xbt_dynar_foreach(file->tasks_before,cpt1,depbefore) {
-                xbt_dynar_foreach(file->tasks_after,cpt2,depafter) {
-                    if (depbefore->src == depafter->dst) {
-                        WARN2("File %s is produced and consumed by task %s. This loop dependency will prevent the execution of the task.",
-                              file->name,depbefore->src->name);
-                    }
-                    newfile = SD_task_create_comm_e2e(file->name,NULL,file->amount);
-                    SD_task_dependency_add(NULL,NULL,depbefore->src,newfile);
-                    SD_task_dependency_add(NULL,NULL,newfile,depafter->dst);
-                    xbt_dynar_push(result,&newfile);
-                }
-            }
+  }
+
+  /* Push end task last */
+  xbt_dynar_push(result, &end_task);
+
+  /* Free previous copy of the files */
+  xbt_dict_free(&files);
+  xbt_dict_free(&computers);
+  fclose(in_file);
+  if (!acyclic_graph_detail(result)) {
+    XBT_ERROR("The DOT described in %s is not a DAG. It contains a cycle.",
+              basename((char*)filename));
+    xbt_dynar_free(&result);
+    /* (result == NULL) here */
+  }
+  return result;
+}
+
+
+xbt_dynar_t SD_dotload_generic(const char * filename)
+{
+  xbt_assert(filename, "Unable to use a null file descriptor\n");
+  //dag_dot =  agopen((char*)filename,Agstrictdirected,0);
+  FILE *in_file = fopen(filename, "r");
+  dag_dot = agread(in_file, NIL(Agdisc_t *));
+
+  result = xbt_dynar_new(sizeof(SD_task_t), dot_task_p_free);
+  files = xbt_dict_new_homogeneous(&dot_task_free);
+  jobs = xbt_dict_new_homogeneous(NULL);
+  computers = xbt_dict_new_homogeneous(NULL);
+  root_task = SD_task_create_comp_seq("root", NULL, 0);
+  /* by design the root task is always SCHEDULABLE */
+  __SD_task_set_state(root_task, SD_SCHEDULABLE);
+
+  xbt_dict_set(jobs, "root", root_task, NULL);
+  xbt_dynar_push(result, &root_task);
+  end_task = SD_task_create_comp_seq("end", NULL, 0);
+  xbt_dict_set(jobs, "end", end_task, NULL);
+
+  Agnode_t *dag_node = NULL;
+  for (dag_node = agfstnode(dag_dot); dag_node; dag_node = agnxtnode(dag_dot, dag_node)) {
+    dot_add_task(dag_node);
+  }
+  agclose(dag_dot);
+  xbt_dict_free(&jobs);
+
+  /* And now, post-process the files.
+   * We want a file task per pair of computation tasks exchanging the file. Duplicate on need
+   * Files not produced in the system are said to be produced by root task (top of DAG).
+   * Files not consumed in the system are said to be consumed by end task (bottom of DAG).
+   */
+  xbt_dict_cursor_t cursor;
+  SD_task_t file;
+  char *name;
+  xbt_dict_foreach(files, cursor, name, file) {
+    unsigned int cpt1, cpt2;
+    SD_task_t newfile = NULL;
+    SD_dependency_t depbefore, depafter;
+    if (xbt_dynar_is_empty(file->tasks_before)) {
+      xbt_dynar_foreach(file->tasks_after, cpt2, depafter) {
+        SD_task_t newfile =
+            SD_task_create_comm_e2e(file->name, NULL, file->amount);
+        SD_task_dependency_add(NULL, NULL, root_task, newfile);
+        SD_task_dependency_add(NULL, NULL, newfile, depafter->dst);
+        xbt_dynar_push(result, &newfile);
+      }
+    } else if (xbt_dynar_is_empty(file->tasks_after)) {
+      xbt_dynar_foreach(file->tasks_before, cpt2, depbefore) {
+        SD_task_t newfile =
+            SD_task_create_comm_e2e(file->name, NULL, file->amount);
+        SD_task_dependency_add(NULL, NULL, depbefore->src, newfile);
+        SD_task_dependency_add(NULL, NULL, newfile, end_task);
+        xbt_dynar_push(result, &newfile);
+      }
+    } else {
+      xbt_dynar_foreach(file->tasks_before, cpt1, depbefore) {
+        xbt_dynar_foreach(file->tasks_after, cpt2, depafter) {
+          if (depbefore->src == depafter->dst) {
+            XBT_WARN
+                ("File %s is produced and consumed by task %s. This loop dependency will prevent the execution of the task.",
+                 file->name, depbefore->src->name);
+          }
+          newfile =
+              SD_task_create_comm_e2e(file->name, NULL, file->amount);
+          SD_task_dependency_add(NULL, NULL, depbefore->src, newfile);
+          SD_task_dependency_add(NULL, NULL, newfile, depafter->dst);
+          xbt_dynar_push(result, &newfile);
         }
+      }
     }
+  }
 
-    /* Push end task last */
-    xbt_dynar_push(result,&end_task);
+  /* Push end task last */
+  xbt_dynar_push(result, &end_task);
 
-    /* Free previous copy of the files */
-    xbt_dict_free(&files);
+  /* Free previous copy of the files */
+  xbt_dict_free(&files);
+  fclose(in_file);
+  if (!acyclic_graph_detail(result)) {
+    XBT_ERROR("The DOT described in %s is not a DAG. It contains a cycle.",
+              basename((char*)filename));
+    xbt_dynar_free(&result);
+    /* (result == NULL) here */
+  }
+  return result;
+}
 
-    //INFO2("result : %lld, dot : %lld",result,*dot);
-    return result;
+/* dot_add_parallel_task create a sd_task of SD_TASK_COMP_PAR_AMDHAL type and
+ * all transfers required for this task. The execution time of the task is
+ * given by the attribute size. The unit of size is the Flop.*/
+void dot_add_parallel_task(Agnode_t * dag_node)
+{
+  char *name = agnameof(dag_node);
+  SD_task_t current_job;
+  double amount = dot_parse_double(agget(dag_node, (char *) "size"));
+  double alpha = dot_parse_double(agget(dag_node, (char *) "alpha"));
+
+  if (alpha == -1.)
+    alpha = 0.0;
+
+  XBT_DEBUG("See <job id=%s amount=%s %.0f alpha=%.2f>", name,
+        agget(dag_node, (char *) "size"), amount, alpha);
+  current_job = xbt_dict_get_or_null(jobs, name);
+  if (current_job == NULL) {
+    current_job =
+        SD_task_create_comp_par_amdahl(name, NULL , amount, alpha);
+#ifdef HAVE_TRACING
+   TRACE_sd_dotloader (current_job, agget (dag_node, (char*)"category"));
+#endif
+    xbt_dict_set(jobs, name, current_job, NULL);
+    xbt_dynar_push(result, &current_job);
+  }
+  Agedge_t *e;
+  int count = 0;
+
+  for (e = agfstin(dag_dot, dag_node); e; e = agnxtin(dag_dot, e)) {
+    dot_add_input_dependencies(current_job, e, parallel);
+    count++;
+  }
+  if (count == 0 && current_job != root_task) {
+    SD_task_dependency_add(NULL, NULL, root_task, current_job);
+  }
+  count = 0;
+  for (e = agfstout(dag_dot, dag_node); e; e = agnxtout(dag_dot, e)) {
+    dot_add_output_dependencies(current_job, e, parallel);
+    count++;
+  }
+  if (count == 0 && current_job != end_task) {
+    SD_task_dependency_add(NULL, NULL, current_job, end_task);
+  }
 }
 
-void Start_dot_job(Agnode_t *dag_node) {
-    char *name = agnameof(dag_node);
-    double runtime = parse_double(agget(dag_node,(char*)"size"));
-    long performer = (long)parse_int((char *) agget(dag_node,(char*)"performer"));
-    INFO3("See <job id=%s runtime=%s %.0f>",name,agget(dag_node,(char*)"size"),runtime);
-    SD_task_t current_job = SD_task_create_comp_seq(name,(void*)performer,runtime);
-    xbt_dict_set(jobs,name,current_job,NULL);
-    xbt_dynar_push(result,&current_job);
-    Agedge_t    *e;
-    int count = 0;
-    for (e = agfstin(dag_dot,dag_node); e; e = agnxtin(dag_dot,e)) {
-        input_edge(current_job,e);
-        count++;
-    }
-    if (count==0){
-        SD_task_t file;
-        char *name= (char*)"root->many";
-        double size = 0;
-
-        file = xbt_dict_get_or_null(files,name);
-        if (file==NULL) {
-            file = SD_task_create_comm_e2e(name,NULL,size);
-            xbt_dict_set(files,name,file,&dot_task_free);
-        } else {
-            if (SD_task_get_amount(file)!=size) {
-                WARN3("Ignoring file %s size redefinition from %.0f to %.0f",
-                      name,SD_task_get_amount(file),size);
-            }
+/* dot_add_task create a sd_task and all transfers required for this
+ * task. The execution time of the task is given by the attribute size.
+ * The unit of size is the Flop.*/
+void dot_add_task(Agnode_t * dag_node)
+{
+  char *name = agnameof(dag_node);
+  SD_task_t current_job;
+  double runtime = dot_parse_double(agget(dag_node, (char *) "size"));
+
+  XBT_DEBUG("See <job id=%s runtime=%s %.0f>", name,
+        agget(dag_node, (char *) "size"), runtime);
+  current_job = xbt_dict_get_or_null(jobs, name);
+  if (current_job == NULL) {
+    current_job =
+        SD_task_create_comp_seq(name, NULL , runtime);
+#ifdef HAVE_TRACING
+   TRACE_sd_dotloader (current_job, agget (dag_node, (char*)"category"));
+#endif
+    xbt_dict_set(jobs, name, current_job, NULL);
+    xbt_dynar_push(result, &current_job);
+  }
+  Agedge_t *e;
+  int count = 0;
+
+  for (e = agfstin(dag_dot, dag_node); e; e = agnxtin(dag_dot, e)) {
+    dot_add_input_dependencies(current_job, e, sequential);
+    count++;
+  }
+  if (count == 0 && current_job != root_task) {
+    SD_task_dependency_add(NULL, NULL, root_task, current_job);
+  }
+  count = 0;
+  for (e = agfstout(dag_dot, dag_node); e; e = agnxtout(dag_dot, e)) {
+    dot_add_output_dependencies(current_job, e, sequential);
+    count++;
+  }
+  if (count == 0 && current_job != end_task) {
+    SD_task_dependency_add(NULL, NULL, current_job, end_task);
+  }
+
+  if(schedule || XBT_LOG_ISENABLED(sd_dotparse, xbt_log_priority_verbose)){
+    /* try to take the information to schedule the task only if all is
+     * right*/
+    // performer is the computer which execute the task
+    unsigned long performer = -1;
+    char * char_performer = agget(dag_node, (char *) "performer");
+    if (char_performer != NULL)
+      performer = (long) dot_parse_int(char_performer);
+
+    // order is giving the task order on one computer
+    unsigned long order = -1;
+    char * char_order = agget(dag_node, (char *) "order");
+    if (char_order != NULL)
+      order = (long) dot_parse_int(char_order);
+    xbt_dynar_t computer = NULL;
+    //XBT_INFO("performer = %d, order=%d",performer,order);
+    if(performer != -1 && order != -1){
+      //necessary parameters are given
+      computer = xbt_dict_get_or_null(computers, char_performer);
+      if(computer == NULL){
+        computer = xbt_dynar_new(sizeof(SD_task_t), NULL);
+        xbt_dict_set(computers, char_performer, computer, NULL);
+      }
+      if(performer < xbt_lib_length(host_lib)){
+        // the  wanted computer is available
+        SD_task_t *task_test = NULL;
+        if(order < computer->used)
+          task_test = xbt_dynar_get_ptr(computer,order);
+        if(task_test != NULL && *task_test != NULL && *task_test != current_job){
+          /*the user gives the same order to several tasks*/
+          schedule = false;
+          XBT_VERB("The task %s starts on the computer %s at the position : %s like the task %s",
+                 (*task_test)->name, char_performer, char_order, current_job->name);
+        }else{
+          //the parameter seems to be ok
+          xbt_dynar_set_as(computer, order, SD_task_t, current_job);
         }
-        SD_task_dependency_add(NULL,NULL,file,current_job);
-    }
-    count = 0;
-    for (e = agfstout(dag_dot,dag_node); e; e = agnxtout(dag_dot,e)) {
-        output_edge(current_job,e);
-        count++;
+      }else{
+        /*the platform has not enough processors to schedule the DAG like
+        *the user wants*/
+        schedule = false;
+        XBT_VERB("The schedule is ignored, there are not enough computers");
+      }
     }
-    if (count==0){
-        SD_task_t file;
-        char *name = (char*)"many->end";
-        double size = 0;
-
-        //  INFO2("See <uses file=%s %s>",A_dot__uses_file,(is_input?"in":"out"));
-        file = xbt_dict_get_or_null(files,name);
-        if (file==NULL) {
-            file = SD_task_create_comm_e2e(name,NULL,size);
-            xbt_dict_set(files,name,file,&dot_task_free);
-        } else {
-            if (SD_task_get_amount(file)!=size) {
-                WARN3("Ignoring file %s size redefinition from %.0f to %.0f",
-                      name,SD_task_get_amount(file),size);
-            }
-        }
-        SD_task_dependency_add(NULL,NULL,current_job,file);
-        if (xbt_dynar_length(file->tasks_before)>1) {
-            WARN1("File %s created at more than one location...",file->name);
-        }
+    else {
+      //one of necessary parameters are not given
+      schedule = false;
+      XBT_VERB("The schedule is ignored, the task %s is not correctly scheduled", current_job->name);
     }
+  }
 }
 
-void input_edge(SD_task_t current_job, Agedge_t *edge) {
-    SD_task_t file;
-
-    char name[80];
-    sprintf(name ,"%s->%s",agnameof(agtail(edge)) ,agnameof(aghead(edge)));
-    double size = parse_double(agget(edge,(char*)"size"));
-    //int sender = parse_int(agget(edge,(char*)"sender"));
-    //int reciever = parse_int(agget(edge,(char*)"reciever"));
+/* dot_add_output_dependencies create the dependencies between a task
+ * and a transfers. This is given by the edges in the dot file. 
+ * The amount of data transfers is given by the attribute size on the
+ * edge. */
+void dot_add_input_dependencies(SD_task_t current_job, Agedge_t * edge,
+                                seq_par_t seq_or_par)
+{
+  SD_task_t file = NULL;
+  char *name_tail=agnameof(agtail(edge));
+  char *name_head=agnameof(aghead(edge));
+  char *name = xbt_malloc((strlen(name_head)+strlen(name_tail)+6)*sizeof(char));
+  sprintf(name, "%s->%s", name_tail, name_head);
+  double size = dot_parse_double(agget(edge, (char *) "size"));
+  XBT_DEBUG("size : %e, get size : %s", size, agget(edge, (char *) "size"));
 
-    file = xbt_dict_get_or_null(files,name);
-    if (file==NULL) {
-        file = SD_task_create_comm_e2e(name,NULL,size);
-        xbt_dict_set(files,name,file,&dot_task_free);
+  if (size > 0) {
+    file = xbt_dict_get_or_null(files, name);
+    if (file == NULL) {
+      if (seq_or_par == sequential){
+          file = SD_task_create_comm_e2e(name, NULL, size);
+      } else {
+          file = SD_task_create_comm_par_mxn_1d_block(name, NULL, size);
+      }
+#ifdef HAVE_TRACING
+      TRACE_sd_dotloader (file, agget (edge, (char*)"category"));
+#endif
+      xbt_dict_set(files, name, file, NULL);
     } else {
-        if (SD_task_get_amount(file)!=size) {
-            WARN3("Ignoring file %s size redefinition from %.0f to %.0f",
-                  name,SD_task_get_amount(file),size);
-        }
+      if (SD_task_get_amount(file) != size) {
+        XBT_WARN("Ignoring file %s size redefinition from %.0f to %.0f",
+              name, SD_task_get_amount(file), size);
+      }
+    }
+    SD_task_dependency_add(NULL, NULL, file, current_job);
+  } else {
+    file = xbt_dict_get_or_null(jobs, name_tail);
+    if (file != NULL) {
+      SD_task_dependency_add(NULL, NULL, file, current_job);
     }
-    SD_task_dependency_add(NULL,NULL,file,current_job);
+  }
+  free(name);
 }
 
-void output_edge(SD_task_t current_job, Agedge_t *edge) {
-    SD_task_t file;
-    char name[80];
-    sprintf(name ,"%s->%s",agnameof(agtail(edge)) ,agnameof(aghead(edge)));
-    double size = parse_double(agget(edge,(char*)"size"));
-    //int sender = parse_int(agget(edge,(char*)"sender"));
-    //int reciever = parse_int(agget(edge,(char*)"reciever"));
-
-    //INFO2("See <uses file=%s %s>",A_dot__uses_file,(is_input?"in":"out"));
-    file = xbt_dict_get_or_null(files,name);
-    if (file==NULL) {
-        file = SD_task_create_comm_e2e(name,NULL,size);
-        xbt_dict_set(files,name,file,&dot_task_free);
+/* dot_add_output_dependencies create the dependencies between a
+ * transfers and a task. This is given by the edges in the dot file.
+ * The amount of data transfers is given by the attribute size on the
+ * edge. */
+void dot_add_output_dependencies(SD_task_t current_job, Agedge_t * edge,
+                                 seq_par_t seq_or_par){
+  SD_task_t file;
+  char *name_tail=agnameof(agtail(edge));
+  char *name_head=agnameof(aghead(edge));
+  char *name = xbt_malloc((strlen(name_head)+strlen(name_tail)+6)*sizeof(char));
+  sprintf(name, "%s->%s", name_tail, name_head);
+  double size = dot_parse_double(agget(edge, (char *) "size"));
+  XBT_DEBUG("size : %e, get size : %s", size, agget(edge, (char *) "size"));
+
+  if (size > 0) {
+    file = xbt_dict_get_or_null(files, name);
+    if (file == NULL) {
+      if (seq_or_par == sequential){
+          file = SD_task_create_comm_e2e(name, NULL, size);
+      } else {
+          file = SD_task_create_comm_par_mxn_1d_block(name, NULL, size);
+      }
+#ifdef HAVE_TRACING
+      TRACE_sd_dotloader (file, agget (edge, (char*)"category"));
+#endif
+      xbt_dict_set(files, name, file, NULL);
     } else {
-        if (SD_task_get_amount(file)!=size) {
-            WARN3("Ignoring file %s size redefinition from %.0f to %.0f",
-                  name,SD_task_get_amount(file),size);
-        }
+      if (SD_task_get_amount(file) != size) {
+        XBT_WARN("Ignoring file %s size redefinition from %.0f to %.0f",
+              name, SD_task_get_amount(file), size);
+      }
+    }
+    SD_task_dependency_add(NULL, NULL, current_job, file);
+    if (xbt_dynar_length(file->tasks_before) > 1) {
+      XBT_WARN("File %s created at more than one location...", file->name);
     }
-    SD_task_dependency_add(NULL,NULL,current_job,file);
-    if (xbt_dynar_length(file->tasks_before)>1) {
-        WARN1("File %s created at more than one location...",file->name);
+  } else {
+    file = xbt_dict_get_or_null(jobs, name_head);
+    if (file != NULL) {
+      SD_task_dependency_add(NULL, NULL, current_job, file);
     }
+  }
+  free(name);
 }
-