#include "xbt/sysdep.h"
#include "surf/surf.h"
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_workstation, sd,
+ "Logging specific to SimDag (workstation)");
+
/* Creates a workstation and registers it in SD.
*/
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 !");
- SD_workstation_t workstation = xbt_new0(s_SD_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;
- const char *name = SD_workstation_get_name(workstation);
+ 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++;
}
/**
- * \brief Returns the workstations list
+ * \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()
*/
-SD_workstation_t* SD_workstation_get_list(void) {
- SD_CHECK_INIT_DONE();
- xbt_assert0(SD_workstation_get_number() > 0, "There is no workstation!");
+const SD_workstation_t* SD_workstation_get_list(void) {
- SD_workstation_t* array = xbt_new0(SD_workstation_t, sd_global->workstation_count);
-
xbt_dict_cursor_t cursor;
char *key;
void *data;
- int i=0;
+ int i;
- xbt_dict_foreach(sd_global->workstations, cursor, key, data) {
- array[i++] = (SD_workstation_t) data;
- }
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(SD_workstation_get_number() > 0, "There is no workstation!");
- return array;
+
+
+ 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;
+ }
+ }
+ return sd_global->workstation_list;
}
/**
const char* SD_workstation_get_name(SD_workstation_t workstation) {
SD_CHECK_INIT_DONE();
xbt_assert0(workstation != NULL, "Invalid parameter");
- return surf_workstation_resource->common_public->get_resource_name(workstation->surf_workstation);
+ 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_workstation_route_get_size() to know the array size.
+ * 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_workstation_route_get_size(), SD_link_t
+ * \see SD_route_get_size(), SD_link_t
*/
-SD_link_t* SD_workstation_route_get_list(SD_workstation_t src, SD_workstation_t dst) {
+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();
- void *surf_src = src->surf_workstation;
- void *surf_dst = dst->surf_workstation;
+ 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);
- const void **surf_route = surf_workstation_resource->extension_public->get_route(surf_src, surf_dst);
- int route_size = surf_workstation_resource->extension_public->get_route_size(surf_src, surf_dst);
- SD_link_t* route = xbt_new0(SD_link_t, route_size);
- const char *link_name;
- int i;
for (i = 0; i < route_size; i++) {
- link_name = surf_workstation_resource->extension_public->get_link_name(surf_route[i]);
- route[i] = xbt_dict_get(sd_global->links, link_name);
+ 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 route;
+ return sd_global->recyclable_route;
}
/**
* \param src a workstation
* \param dst another workstation
* \return the number of links on the route between these two workstations
- * \see SD_workstation_route_get_list()
+ * \see SD_route_get_list()
*/
-int SD_workstation_route_get_size(SD_workstation_t src, SD_workstation_t dst) {
+int SD_route_get_size(SD_workstation_t src, SD_workstation_t dst) {
SD_CHECK_INIT_DONE();
- return surf_workstation_resource->extension_public->
+ return surf_workstation_model->extension_public->
get_route_size(src->surf_workstation, dst->surf_workstation);
}
double SD_workstation_get_power(SD_workstation_t workstation) {
SD_CHECK_INIT_DONE();
xbt_assert0(workstation != NULL, "Invalid parameter");
- return surf_workstation_resource->extension_public->get_speed(workstation->surf_workstation, 1.0);
+ return surf_workstation_model->extension_public->get_speed(workstation->surf_workstation, 1.0);
}
/**
double SD_workstation_get_available_power(SD_workstation_t workstation) {
SD_CHECK_INIT_DONE();
xbt_assert0(workstation != NULL, "Invalid parameter");
- return surf_workstation_resource->extension_public->get_available_speed(workstation->surf_workstation);
+ return surf_workstation_model->extension_public->get_available_speed(workstation->surf_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)
+ */
+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);
+}
+
+/**
+ * \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;
+}
+
+/**
+ * \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;
+}
+
+/**
+ * \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 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();
+ }
+}
+
+/* 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.
+ */
+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.
*/
void __SD_workstation_destroy(void *workstation) {
+
+ SD_workstation_t w;
+
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 */
- xbt_free(workstation);
+
+ w = (SD_workstation_t) workstation;
+
+ if (w->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ xbt_fifo_free(w->task_fifo);
+ }
+ xbt_free(w);
}
