X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/acf57cdad5e2bf1046a3f1b39e7e18b045a7121d..cf56a22da60094d8e7f14b1457526dc194d40226:/src/simdag/sd_workstation.c

diff --git a/src/simdag/sd_workstation.c b/src/simdag/sd_workstation.c
index 65c8032b39..814c09171d 100644
--- a/src/simdag/sd_workstation.c
+++ b/src/simdag/sd_workstation.c
@@ -1,120 +1,458 @@
+#include "private.h"
 #include "simdag/simdag.h"
 #include "xbt/dict.h"
 #include "xbt/sysdep.h"
-/*#include "private.h"*/
+#include "surf/surf.h"
 
-static xbt_dict_t workstations;  /* workstation list */
-static int workstation_count; /* number of workstations */
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_workstation, sd,
+				"Logging specific to SimDag (workstation)");
 
-  void *data;
-  char *name;
-  double power;
-  double available_power;
-  /* TODO: route */
-
-/* Creates a workstation.
+/* Creates a workstation and registers it in SD.
  */
-SG_workstation_t SG_workstation_create(void *data, const char *name, double power,
-				      double available_power) {
-  xbt_assert0(power >= 0 && available_power >= 0, "Invalid parameter"); /* or > 0 ? */
+SD_workstation_t __SD_workstation_create(void *surf_workstation, void *data) {
+
+  SD_workstation_t workstation;
+  const char *name;
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(surf_workstation != NULL, "surf_workstation is NULL !");
 
-  SG_workstation_t workstation = xbt_new0(s_SG_workstation_t, 1);
+  workstation = xbt_new(s_SD_workstation_t, 1);
+  workstation->surf_workstation = surf_workstation;
+  workstation->data = data; /* user data */
+  workstation->access_mode = SD_WORKSTATION_SHARED_ACCESS; /* default mode is shared */
+  workstation->task_fifo = NULL;
+  workstation->current_task = NULL;
   
-  workstation->data = data;
-  workstation->name = xbt_strdup(name);
-  workstation->power = power;
-  workstation->available_power = power;
-  /* TODO: route */
+  name = SD_workstation_get_name(workstation);
+  xbt_dict_set(sd_global->workstations, name, workstation, __SD_workstation_destroy); /* add the workstation to the dictionary */
+  sd_global->workstation_count++;
 
   return workstation;
 }
 
-/* Returns a workstation given its name, or NULL if there is no such workstation.
+/**
+ * \brief Returns a workstation given its name
+ *
+ * If there is no such workstation, the function returns \c NULL.
+ *
+ * \param name workstation name
+ * \return the workstation, or \c NULL if there is no such workstation
  */
-SG_workstation_t SG_workstation_get_by_name(const char *name) {
-  xbt_assert0(name, "Invalid parameter");
+SD_workstation_t SD_workstation_get_by_name(const char *name) {
+  SD_CHECK_INIT_DONE();
+
+  xbt_assert0(name != NULL, "Invalid parameter");
 
-  return xbt_dict_get_or_null(workstations, name);
+  return xbt_dict_get_or_null(sd_global->workstations, name);
 }
 
-/* Returns a NULL-terminated array of existing workstations.
+/**
+ * \brief Returns the workstation list
+ *
+ * Use SD_workstation_get_number() to know the array size.
+ *
+ * \return an array of \ref SD_workstation_t containing all workstations
+ * \see SD_workstation_get_number()
  */
-SG_workstation_t*  SG_workstation_get_list(void) {
-  SG_workstation_t* array = xbt_new0(SG_workstation_t, workstation_count + 1);
-  
+const SD_workstation_t* SD_workstation_get_list(void) {
+
   xbt_dict_cursor_t cursor;
   char *key;
   void *data;
-  int i=0;
+  int i;
+
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(SD_workstation_get_number() > 0, "There is no workstation!");
+
 
-  xbt_dict_foreach(workstations,cursor,key,data) {
-    array[i++] = (SG_workstation_t) data;
+
+  if (sd_global->workstation_list == NULL) { /* this is the first time the function is called */
+    sd_global->workstation_list = xbt_new(SD_workstation_t, sd_global->workstation_count);
+  
+    i = 0;
+    xbt_dict_foreach(sd_global->workstations, cursor, key, data) {
+      sd_global->workstation_list[i++] = (SD_workstation_t) data;
+    }
   }
-  array[i] = NULL;
+  return sd_global->workstation_list;
+}
 
-  return array;
+/**
+ * \brief Returns the number of workstations
+ *
+ * \return the number of existing workstations
+ * \see SD_workstation_get_list()
+ */
+int SD_workstation_get_number(void) {
+  SD_CHECK_INIT_DONE();
+  return sd_global->workstation_count;
 }
 
-/* Returns the number or workstations.
+/**
+ * \brief Returns the user data of a workstation
+ *
+ * \param workstation a workstation
+ * \return the user data associated with this workstation (can be \c NULL)
+ * \see SD_workstation_set_data()
  */
-int SG_workstation_get_number(void) {
-  return workstation_count;
+void* SD_workstation_get_data(SD_workstation_t workstation) {
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL, "Invalid parameter");
+  return workstation->data;
 }
 
-/* Sets the data of a workstation.
+/**
+ * \brief Sets the user data of a workstation
+ *
+ * The new data can be \c NULL. The old data should have been freed first
+ * if it was not \c NULL.
+ *
+ * \param workstation a workstation
+ * \param data the new data you want to associate with this workstation
+ * \see SD_workstation_get_data()
  */
-void SG_workstation_set_data(SG_workstation_t workstation, void *data) {
-  xbt_assert0(workstation, "Invalid parameter");
+void SD_workstation_set_data(SD_workstation_t workstation, void *data) {
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL, "Invalid parameter");
   workstation->data = data;
 }
 
-/* Returns the data of a workstation.
+/**
+ * \brief Returns the name of a workstation
+ *
+ * \param workstation a workstation
+ * \return the name of this workstation (cannot be \c NULL)
  */
-void* SG_workstation_get_data(SG_workstation_t workstation) {
-  xbt_assert0(workstation, "Invalid parameter");
-  return workstation->data;
+const char* SD_workstation_get_name(SD_workstation_t workstation) {
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL, "Invalid parameter");
+  return surf_workstation_model->common_public->get_resource_name(workstation->surf_workstation);
+}
+
+/**
+ * \brief Returns the value of a given workstation property
+ *
+ * \param workstation a workstation
+ * \param name a property name
+ * \return value of a property (or NULL if property not set)
+ */
+const char* SD_workstation_get_property_value(SD_workstation_t ws, const char* name)
+{
+  return xbt_dict_get_or_null(SD_workstation_get_properties(ws), name);
+}
+
+
+/**
+ * \brief Returns a #xbt_dict_t consisting of the list of properties assigned to this workstation
+ *
+ * \param workstation a workstation
+ * \return the dictionary containing the properties associated with the workstation
+ */
+xbt_dict_t SD_workstation_get_properties(SD_workstation_t workstation)
+{
+  SD_CHECK_INIT_DONE();
+  xbt_assert0((workstation != NULL), "Invalid parameters");
+
+  return (surf_workstation_model->common_public->get_properties(workstation->surf_workstation));
+
+}
+
+
+/**
+ * \brief Returns the route between two workstations
+ *
+ * Use SD_route_get_size() to know the array size.
+ *
+ * \param src a workstation
+ * \param dst another workstation
+ * \return a new array of \ref SD_link_t representating the route between these two workstations
+ * \see SD_route_get_size(), SD_link_t
+ */
+const SD_link_t* SD_route_get_list(SD_workstation_t src, SD_workstation_t dst) {
+  void *surf_src;
+  void *surf_dst;
+  const void **surf_route;
+  int route_size;
+  const char *link_name;
+  int i;
+  
+  SD_CHECK_INIT_DONE();
+
+  if (sd_global->recyclable_route == NULL) {
+    /* first run */
+    sd_global->recyclable_route = xbt_new(SD_link_t, SD_link_get_number());
+  }
+
+  surf_src = src->surf_workstation;
+  surf_dst = dst->surf_workstation;
+
+  surf_route = surf_workstation_model->extension_public->get_route(surf_src, surf_dst);
+  route_size = surf_workstation_model->extension_public->get_route_size(surf_src, surf_dst);
+
+
+  for (i = 0; i < route_size; i++) {
+    link_name = surf_workstation_model->extension_public->get_link_name(surf_route[i]);
+    sd_global->recyclable_route[i] = xbt_dict_get(sd_global->links, link_name);
+  }
+
+  return sd_global->recyclable_route;
+}
+
+/**
+ * \brief Returns the number of links on the route between two workstations
+ *
+ * \param src a workstation
+ * \param dst another workstation
+ * \return the number of links on the route between these two workstations
+ * \see SD_route_get_list()
+ */
+int SD_route_get_size(SD_workstation_t src, SD_workstation_t dst) {
+  SD_CHECK_INIT_DONE();
+  return surf_workstation_model->extension_public->
+    get_route_size(src->surf_workstation, dst->surf_workstation);
+}
+
+/**
+ * \brief Returns the total power of a workstation
+ *
+ * \param workstation a workstation
+ * \return the total power of this workstation
+ * \see SD_workstation_get_available_power()
+ */
+double SD_workstation_get_power(SD_workstation_t workstation) {
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL, "Invalid parameter");
+  return surf_workstation_model->extension_public->get_speed(workstation->surf_workstation, 1.0);
+}
+
+/**
+ * \brief Returns the proportion of available power in a workstation
+ *
+ * \param workstation a workstation
+ * \return the proportion of power currently available in this workstation (normally a number between 0 and 1)
+ * \see SD_workstation_get_power()
+ */
+double SD_workstation_get_available_power(SD_workstation_t workstation) {
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL, "Invalid parameter");
+  return surf_workstation_model->extension_public->get_available_speed(workstation->surf_workstation);
 }
 
-/* Returns the name of a workstation.
+/**
+ * \brief Returns an approximative estimated time for the given computation amount on a workstation
+ *
+ * \param workstation a workstation
+ * \param computation_amount the computation amount you want to evaluate (in flops)
+ * \return an approximative astimated computation time for the given computation amount on this workstation (in seconds)
  */
-const char* SG_workstation_get_name(SG_workstation_t workstation) {
-  xbt_assert0(workstation, "Invalid parameter");
-  return workstation->name;
+double SD_workstation_get_computation_time(SD_workstation_t workstation, double computation_amount) {
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL, "Invalid parameter");
+  xbt_assert0(computation_amount >= 0, "computation_amount must be greater than or equal to zero");
+  return computation_amount / SD_workstation_get_power(workstation);
 }
 
-SG_link_t* SG_workstation_route_get_list(SG_workstation_t src, SG_workstation_t dst) {
-  /* TODO */
-  return NULL;
+/**
+ * \brief Returns the latency of the route between two workstations, i.e. the sum of all link latencies
+ * between the workstations.
+ *
+ * \param src the first workstation
+ * \param dst the second workstation
+ * \return the latency of the route between the two workstations (in seconds)
+ * \see SD_route_get_current_bandwidth()
+ */
+double SD_route_get_current_latency(SD_workstation_t src, SD_workstation_t dst) {
+
+  const SD_link_t *links;
+  int nb_links;
+  double latency ;
+  int i;
+
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
+  links = SD_route_get_list(src, dst);
+  nb_links = SD_route_get_size(src, dst);
+  latency = 0.0;
+  
+  for (i = 0; i < nb_links; i++) {
+    latency += SD_link_get_current_latency(links[i]);
+  }
+
+  return latency;
 }
 
-int SG_workstation_route_get_size(SG_workstation_t src, SG_workstation_t dst) {
-  /* TODO */
-  return 0;
+/**
+ * \brief Returns the bandwidth of the route between two workstations, i.e. the minimum link bandwidth of all
+ * between the workstations.
+ *
+ * \param src the first workstation
+ * \param dst the second workstation
+ * \return the bandwidth of the route between the two workstations (in bytes/second)
+ * \see SD_route_get_current_latency()
+ */
+double SD_route_get_current_bandwidth(SD_workstation_t src, SD_workstation_t dst) {
+
+  const SD_link_t *links;
+  int nb_links;
+  double bandwidth;
+  double min_bandwidth;
+  int i;
+
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
+
+  links = SD_route_get_list(src, dst);
+  nb_links = SD_route_get_size(src, dst);
+  bandwidth = min_bandwidth = -1.0;
+
+  
+  for (i = 0; i < nb_links; i++) {
+    bandwidth = SD_link_get_current_bandwidth(links[i]);
+    if (bandwidth < min_bandwidth || min_bandwidth == -1.0)
+      min_bandwidth = bandwidth;
+  }
+
+  return min_bandwidth;
 }
 
-/* Returns the total power of a workstation.
+/**
+ * \brief Returns an approximative estimated time for the given
+ * communication amount between two workstations
+ *
+ * \param src the first workstation
+ * \param dst the second workstation
+ * \param communication_amount the communication amount you want to evaluate (in bytes)
+ * \return an approximative astimated computation time for the given communication amount
+ * between the workstations (in seconds)
  */
-double SG_workstation_get_power(SG_workstation_t workstation) {
-  xbt_assert0(workstation, "Invalid parameter");
-  return workstation->power;
+double SD_route_get_communication_time(SD_workstation_t src, SD_workstation_t dst,
+						   double communication_amount) {
+
+
+  /* total time = latency + transmission time of the slowest link
+     transmission time of a link = communication amount / link bandwidth */
+
+  const SD_link_t *links;
+  int nb_links;
+  double bandwidth, min_bandwidth;
+  double latency;
+  int i;
+
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
+  xbt_assert0(communication_amount >= 0, "communication_amount must be greater than or equal to zero");
+
+
+  
+  if (communication_amount == 0.0)
+    return 0.0;
+
+  links = SD_route_get_list(src, dst);
+  nb_links = SD_route_get_size(src, dst);
+  min_bandwidth = -1.0;
+  latency = 0;
+
+  for (i = 0; i < nb_links; i++) {
+    latency += SD_link_get_current_latency(links[i]);
+    bandwidth = SD_link_get_current_bandwidth(links[i]);
+    if (bandwidth < min_bandwidth || min_bandwidth == -1.0)
+      min_bandwidth = bandwidth;
+  }
+
+  return latency + (communication_amount / min_bandwidth);
+}
+
+/**
+ * \brief Returns the access mode of this workstation.
+ *
+ * \param workstation a workstation
+ * \return the access mode for the tasks running on this workstation:
+ * SD_WORKSTATION_SHARED_ACCESS or SD_WORKSTATION_SEQUENTIAL_ACCESS
+ *
+ * \see SD_workstation_set_access_mode(), e_SD_workstation_access_mode_t
+ */
+ e_SD_workstation_access_mode_t SD_workstation_get_access_mode(SD_workstation_t workstation) {
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL, "Invalid parameter");
+  return workstation->access_mode;
+}
+
+/**
+ * \brief Sets the access mode for the tasks that will be executed on a workstation
+ *
+ * By default, a workstation model is shared, i.e. several tasks
+ * can be executed at the same time on a workstation. The CPU power of
+ * the workstation is shared between the running tasks on the workstation.
+ * In sequential mode, only one task can use the workstation, and the other
+ * tasks wait in a FIFO.
+ *
+ * \param workstation a workstation
+ * \param access_mode the access mode you want to set to this workstation:
+ * SD_WORKSTATION_SHARED_ACCESS or SD_WORKSTATION_SEQUENTIAL_ACCESS
+ *
+ * \see SD_workstation_get_access_mode(), e_SD_workstation_access_mode_t
+ */
+void SD_workstation_set_access_mode(SD_workstation_t workstation, e_SD_workstation_access_mode_t access_mode) {
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL, "Invalid parameter");
+
+  if (access_mode == workstation->access_mode) {
+    return; // nothing is changed
+  }
+
+  workstation->access_mode = access_mode;
+
+  if (access_mode == SD_WORKSTATION_SHARED_ACCESS) {
+    xbt_fifo_free(workstation->task_fifo);
+    workstation->task_fifo = NULL;
+  }
+  else {
+    workstation->task_fifo = xbt_fifo_new();
+  }
 }
 
-/* Return the available power of a workstation.
+/* Returns whether a task can start now on a workstation.
+ *//*
+int __SD_workstation_can_start(SD_workstation_t workstation, SD_task_t task) {
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL && task != NULL, "Invalid parameter");
+
+  return !__SD_workstation_is_busy(workstation) &&
+    (xbt_fifo_size(workstation->task_fifo) == 0) || xbt_fifo_get_first_item(workstation->task_fifo) == task);
+}
+*/
+
+/* Returns whether a workstation is busy. A workstation is busy is it is
+ * in sequential mode and a task is running on it or the fifo is not empty.
  */
-double SG_workstation_get_available_power(SG_workstation_t workstation) {
-  xbt_assert0(workstation, "Invalid parameter");
-  return workstation->available_power;
+int __SD_workstation_is_busy(SD_workstation_t workstation) {
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL, "Invalid parameter");
+  
+  DEBUG4("Workstation '%s' access mode: '%s', current task: %s, fifo size: %d",
+	 SD_workstation_get_name(workstation),
+	 (workstation->access_mode==SD_WORKSTATION_SHARED_ACCESS)?"SHARED":"FIFO",
+	 (workstation->current_task ? SD_task_get_name(workstation->current_task) : "none"),
+	 (workstation->task_fifo ? xbt_fifo_size(workstation->task_fifo) : 0));
+
+  return workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS &&
+    (workstation->current_task != NULL || xbt_fifo_size(workstation->task_fifo) > 0);
 }
 
-/* Destroys a workstation. The user data (if any) should have been destroyed first.
+/* Destroys a workstation.
  */
-void SG_workstation_destroy(SG_workstation_t workstation) {
-  xbt_assert0(workstation, "Invalid parameter");
+void __SD_workstation_destroy(void *workstation) {
 
-  if (workstation->name)
-    free(workstation->name);
+  SD_workstation_t w;
 
-  /* TODO: route */
+  SD_CHECK_INIT_DONE();
+  xbt_assert0(workstation != NULL, "Invalid parameter");
+  /* workstation->surf_workstation is freed by surf_exit and workstation->data is freed by the user */
 
-  free(workstation);
+  w = (SD_workstation_t) workstation;
+
+  if (w->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+    xbt_fifo_free(w->task_fifo);
+  }
+  xbt_free(w);
 }