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[simgrid.git]
/
src
/
simdag
/
sd_task.c
diff --git
a/src/simdag/sd_task.c
b/src/simdag/sd_task.c
index
e7bd309
..
3b97116
100644
(file)
--- a/
src/simdag/sd_task.c
+++ b/
src/simdag/sd_task.c
@@
-174,13
+174,40
@@
SD_task_t SD_task_create_comp_par_amdahl(const char *name, void *data,
{
xbt_assert(alpha < 1. && alpha >= 0.,
"Invalid parameter: alpha must be in [0.;1.[");
-
+
SD_task_t res = SD_task_create(name, data, amount);
res->alpha = alpha;
res->kind = SD_TASK_COMP_PAR_AMDAHL;
return res;
}
+/** @brief create a complex data redistribution task that can then be
+ * auto-scheduled
+ *
+ * Auto-scheduling mean that the task can be used with SD_task_schedulev().
+ * This allows to specify the task costs at creation, and decouple them from
+ * the scheduling process where you just specify which resource should
+ * communicate.
+ *
+ * A data redistribution can be scheduled on any number of host.
+ * The assumed distribution is a 1D block distribution. Each host owns the same
+ * share of the \see amount.
+ * To be auto-scheduled, \see SD_task_distribute_comm_mxn_1d_block has to be
+ * called first.
+ * \param name the name of the task (can be \c NULL)
+ * \param data the user data you want to associate with the task (can be
+ * \c NULL)
+ * \param amount amount of data to redistribute by the task
+ * \return the new task
+ */
+SD_task_t SD_task_create_comm_par_mxn_1d_block(const char *name, void *data,
+ double amount)
+{
+ SD_task_t res = SD_task_create(name, data, amount);
+ res->workstation_list=NULL;
+ res->kind = SD_TASK_COMM_PAR_MXN_1D_BLOCK;
+ return res;
+}
/**
* \brief Destroys a task.
@@
-212,13
+239,13
@@
void SD_task_destroy(SD_task_t task)
xbt_free(task->communication_amount);
xbt_free(task->computation_amount);
- xbt_mallocator_release(sd_global->task_mallocator,task);
- sd_global->task_number--;
-
#ifdef HAVE_TRACING
if (task->category) xbt_free(task->category);
#endif
+ xbt_mallocator_release(sd_global->task_mallocator,task);
+ sd_global->task_number--;
+
XBT_DEBUG("Task destroyed.");
}
@@
-249,6
+276,28
@@
void SD_task_set_data(SD_task_t task, void *data)
task->data = data;
}
+/**
+ * \brief Sets the rate of a task
+ *
+ * This will change the network bandwidth a task can use. This rate
+ * depends on both the nominal bandwidth on the route onto which the task is
+ * scheduled (\see SD_task_get_current_bandwidth) and the amount of data to
+ * transfer.
+ *
+ * To divide the nominal bandwidth by 2, the rate then has to be :
+ * rate = bandwidth/(2*amount)
+ *
+ * \param task a \see SD_TASK_COMM_E2E task (end-to-end communication)
+ * \param rate the new rate you want to associate with this task.
+ */
+void SD_task_set_rate(SD_task_t task, double rate)
+{
+ xbt_assert(task->kind == SD_TASK_COMM_E2E,
+ "The rate can be modified for end-to-end communications only.");
+
+ task->rate = rate;
+}
+
/**
* \brief Returns the state of a task
*
@@
-455,12
+504,17
@@
void SD_task_dump(SD_task_t task)
case SD_TASK_COMP_PAR_AMDAHL:
XBT_INFO(" - kind: parallel computation following Amdahl's law");
break;
+ case SD_TASK_COMM_PAR_MXN_1D_BLOCK:
+ XBT_INFO(" - kind: MxN data redistribution assuming 1D block distribution");
+ break;
default:
XBT_INFO(" - (unknown kind %d)", task->kind);
}
}
XBT_INFO(" - amount: %.0f", SD_task_get_amount(task));
- XBT_INFO(" - Dependencies to satisfy: %u", task->unsatisfied_dependencies);
+ if (task->kind == SD_TASK_COMP_PAR_AMDAHL)
+ XBT_INFO(" - alpha: %.2f", task->alpha);
+ XBT_INFO(" - Dependencies to satisfy: %d", task->unsatisfied_dependencies);
if (!xbt_dynar_is_empty(task->tasks_before)) {
XBT_INFO(" - pre-dependencies:");
xbt_dynar_foreach(task->tasks_before, counter, dependency) {
@@
-483,9
+537,11
@@
void SD_task_dotty(SD_task_t task, void *out)
fprintf(out, " T%p [label=\"%.20s\"", task, task->name);
switch (task->kind) {
case SD_TASK_COMM_E2E:
+ case SD_TASK_COMM_PAR_MXN_1D_BLOCK:
fprintf(out, ", shape=box");
break;
case SD_TASK_COMP_SEQ:
+ case SD_TASK_COMP_PAR_AMDAHL:
fprintf(out, ", shape=circle");
break;
default:
@@
-538,7
+594,7
@@
void SD_task_dependency_add(const char *name, void *data, SD_task_t src,
&& !__SD_task_is_scheduled_or_runnable(src) && !__SD_task_is_running(src))
THROWF(arg_error, 0,
"Task '%s' must be SD_NOT_SCHEDULED, SD_SCHEDULABLE, SD_SCHEDULED or SD_RUNNABLE"
-
" or SD_RUNNING",
+ " or SD_RUNNING",
SD_task_get_name(src));
if (!__SD_task_is_not_scheduled(dst) && !__SD_task_is_schedulable(dst)
@@
-583,9
+639,6
@@
void SD_task_dependency_add(const char *name, void *data, SD_task_t src,
SD_task_get_name(dst));
__SD_task_set_state(dst, SD_SCHEDULED);
}
-
- /* __SD_print_dependencies(src);
- __SD_print_dependencies(dst); */
}
/**
@@
-924,8
+977,12
@@
void SD_task_unschedule(SD_task_t task)
SD_task_get_name(task));
if (__SD_task_is_scheduled_or_runnable(task) /* if the task is scheduled or runnable */
- &&task->kind == SD_TASK_NOT_TYPED) /* Don't free scheduling data for typed tasks */
+ && ((task->kind == SD_TASK_COMP_PAR_AMDAHL) ||
+ (task->kind == SD_TASK_COMM_PAR_MXN_1D_BLOCK))) { /* Don't free scheduling data for typed tasks */
__SD_task_destroy_scheduling_data(task);
+ task->workstation_list=NULL;
+ task->workstation_nb = 0;
+ }
if (__SD_task_is_running(task)) /* the task should become SD_FAILED */
surf_workstation_model->action_cancel(task->surf_action);
@@
-939,7
+996,8
@@
void SD_task_unschedule(SD_task_t task)
task->start_time = -1.0;
}
-/* Destroys the data memorized by SD_task_schedule. Task state must be SD_SCHEDULED or SD_RUNNABLE.
+/* Destroys the data memorized by SD_task_schedule.
+ * Task state must be SD_SCHEDULED or SD_RUNNABLE.
*/
static void __SD_task_destroy_scheduling_data(SD_task_t task)
{
@@
-954,9
+1012,9
@@
static void __SD_task_destroy_scheduling_data(SD_task_t task)
task->computation_amount = task->communication_amount = NULL;
}
-/* Runs a task. This function is directly called by __SD_task_try_to_run if
the task
- *
doesn't have to wait in fifos. Otherwise, it is called by __SD_task_just_done when
- *
the task gets out of its fifo
s.
+/* Runs a task. This function is directly called by __SD_task_try_to_run if
+ *
the task doesn't have to wait in FIFOs. Otherwise, it is called by
+ *
__SD_task_just_done when the task gets out of its FIFO
s.
*/
void __SD_task_really_run(SD_task_t task)
{
@@
-971,12
+1029,11
@@
void __SD_task_really_run(SD_task_t task)
"Task '%s': workstation_list is NULL!",
SD_task_get_name(task));
-
-
XBT_DEBUG("Really running task '%s'", SD_task_get_name(task));
+ int workstation_nb = task->workstation_nb;
/* set this task as current task for the workstations in sequential mode */
- for (i = 0; i <
task->
workstation_nb; i++) {
+ for (i = 0; i < workstation_nb; i++) {
if (SD_workstation_get_access_mode(task->workstation_list[i]) ==
SD_WORKSTATION_SEQUENTIAL_ACCESS) {
task->workstation_list[i]->current_task = task;
@@
-990,71
+1047,31
@@
void __SD_task_really_run(SD_task_t task)
/* start the task */
- /* we have to create a Surf workstation array instead of the SimDag workstation array */
- surf_workstations = xbt_new(void *, task->workstation_nb);
+ /* we have to create a Surf workstation array instead of the SimDag
+ * workstation array */
+ surf_workstations = xbt_new(void *, workstation_nb);
- for (i = 0; i <
task->
workstation_nb; i++)
+ for (i = 0; i < workstation_nb; i++)
surf_workstations[i] = task->workstation_list[i]->surf_workstation;
- /* It's allowed to pass a NULL vector as cost to mean vector of 0.0 (easing user's life). Let's deal with it */
-#define cost_or_zero(array,pos) ((array)?(array)[pos]:0.0)
+ double *computation_amount = xbt_new0(double, workstation_nb);
+ double *communication_amount = xbt_new0(double, workstation_nb * workstation_nb);
- task->surf_action = NULL;
- if ((task->workstation_nb == 1)
- && (cost_or_zero(task->communication_amount, 0) == 0.0)) {
- task->surf_action =
- surf_workstation_model->extension.
- workstation.execute(surf_workstations[0],
- cost_or_zero(task->computation_amount, 0));
- } else if ((task->workstation_nb == 1)
- && (cost_or_zero(task->computation_amount, 0) == 0.0)) {
-
- task->surf_action =
- surf_workstation_model->extension.
- workstation.communicate(surf_workstations[0], surf_workstations[0],
- cost_or_zero(task->communication_amount,
- 0), task->rate);
- } else if ((task->workstation_nb == 2)
- && (cost_or_zero(task->computation_amount, 0) == 0.0)
- && (cost_or_zero(task->computation_amount, 1) == 0.0)) {
- int nb = 0;
- double value = 0.0;
-
- for (i = 0; i < task->workstation_nb * task->workstation_nb; i++) {
- if (cost_or_zero(task->communication_amount, i) > 0.0) {
- nb++;
- value = cost_or_zero(task->communication_amount, i);
- }
- }
- if (nb == 1) {
- task->surf_action =
- surf_workstation_model->extension.
- workstation.communicate(surf_workstations[0],
- surf_workstations[1], value, task->rate);
- }
- }
-#undef cost_or_zero
-
- if (!task->surf_action) {
- double *computation_amount = xbt_new(double, task->workstation_nb);
- double *communication_amount = xbt_new(double, task->workstation_nb *
- task->workstation_nb);
+ if(task->computation_amount)
memcpy(computation_amount, task->computation_amount, sizeof(double) *
- task->workstation_nb);
+ workstation_nb);
+ if(task->communication_amount)
memcpy(communication_amount, task->communication_amount,
- sizeof(double) *
task->workstation_nb * task->
workstation_nb);
+ sizeof(double) *
workstation_nb *
workstation_nb);
-
task->surf_action =
+ task->surf_action =
surf_workstation_model->extension.
- workstation.execute_parallel_task(
task->
workstation_nb,
+ workstation.execute_parallel_task(workstation_nb,
surf_workstations,
computation_amount,
communication_amount,
task->rate);
- } else {
- xbt_free(surf_workstations);
- }
surf_workstation_model->action_data_set(task->surf_action, task);
@@
-1072,10
+1089,11
@@
void __SD_task_really_run(SD_task_t task)
}
-/* Tries to run a task. This function is called by SD_simulate() when a scheduled task becomes SD_RUNNABLE
- * (ie when its dependencies are satisfied).
- * If one of the workstations where the task is scheduled on is busy (in sequential mode),
- * the task doesn't start.
+/* Tries to run a task. This function is called by SD_simulate() when a
+ * scheduled task becomes SD_RUNNABLE (i.e., when its dependencies are
+ * satisfied).
+ * If one of the workstations where the task is scheduled on is busy (in
+ * sequential mode), the task doesn't start.
* Returns whether the task has started.
*/
int __SD_task_try_to_run(SD_task_t task)
@@
-1097,11
+1115,11
@@
int __SD_task_try_to_run(SD_task_t task)
XBT_DEBUG("Task '%s' can start: %d", SD_task_get_name(task), can_start);
- if (!can_start) { /* if the task cannot start and is not in the
fifo
s yet */
+ if (!can_start) { /* if the task cannot start and is not in the
FIFO
s yet */
for (i = 0; i < task->workstation_nb; i++) {
workstation = task->workstation_list[i];
if (workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
- XBT_DEBUG("Pushing task '%s' in the
fifo
of workstation '%s'",
+ XBT_DEBUG("Pushing task '%s' in the
FIFO
of workstation '%s'",
SD_task_get_name(task),
SD_workstation_get_name(workstation));
xbt_fifo_push(workstation->task_fifo, task);
@@
-1120,7
+1138,7
@@
int __SD_task_try_to_run(SD_task_t task)
/* This function is called by SD_simulate when a task is done.
* It updates task->state and task->action and executes if necessary the tasks
- * which were waiting in
fifo
s for the end of `task'
+ * which were waiting in
FIFO
s for the end of `task'
*/
void __SD_task_just_done(SD_task_t task)
{
@@
-1150,14
+1168,14
@@
void __SD_task_just_done(SD_task_t task)
XBT_DEBUG("Looking for candidates");
/* if the task was executed on sequential workstations,
- maybe we can execute the next task of the
fifo
for each workstation */
+ maybe we can execute the next task of the
FIFO
for each workstation */
for (i = 0; i < task->workstation_nb; i++) {
workstation = task->workstation_list[i];
XBT_DEBUG("Workstation '%s': access_mode = %d",
SD_workstation_get_name(workstation), (int)workstation->access_mode);
if (workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
xbt_assert(workstation->task_fifo != NULL,
- "Workstation '%s' has sequential access but no
fifo
!",
+ "Workstation '%s' has sequential access but no
FIFO
!",
SD_workstation_get_name(workstation));
xbt_assert(workstation->current_task =
task, "Workstation '%s': current task should be '%s'",
@@
-1167,7
+1185,7
@@
void __SD_task_just_done(SD_task_t task)
/* the task is over so we can release the workstation */
workstation->current_task = NULL;
- XBT_DEBUG("Getting candidate in
fifo
");
+ XBT_DEBUG("Getting candidate in
FIFO
");
candidate =
xbt_fifo_get_item_content(xbt_fifo_get_first_item
(workstation->task_fifo));
@@
-1185,9
+1203,10
@@
void __SD_task_just_done(SD_task_t task)
/* if there was a task waiting for my place */
if (candidate != NULL) {
/* Unfortunately, we are not sure yet that we can execute the task now,
- because the task can be waiting more deeply in some other workstation's fifos...
- So we memorize all candidate tasks, and then we will check for each candidate
- whether or not all its workstations are available. */
+ because the task can be waiting more deeply in some other
+ workstation's FIFOs ...
+ So we memorize all candidate tasks, and then we will check for each
+ candidate whether or not all its workstations are available. */
/* realloc if necessary */
if (candidate_nb == candidate_capacity) {
@@
-1222,7
+1241,7
@@
void __SD_task_just_done(SD_task_t task)
workstation = candidate->workstation_list[j];
/* I can start on this workstation if the workstation is shared
- or if I am the first task in the
fifo
*/
+ or if I am the first task in the
FIFO
*/
can_start = workstation->access_mode == SD_WORKSTATION_SHARED_ACCESS
|| candidate ==
xbt_fifo_get_item_content(xbt_fifo_get_first_item
@@
-1237,14
+1256,14
@@
void __SD_task_just_done(SD_task_t task)
for (j = 0; j < candidate->workstation_nb && can_start; j++) {
workstation = candidate->workstation_list[j];
- /* update the
fifo
*/
+ /* update the
FIFO
*/
if (workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
candidate = xbt_fifo_shift(workstation->task_fifo); /* the return value is stored just for debugging */
- XBT_DEBUG("Head of the
fifo
: '%s'",
+ XBT_DEBUG("Head of the
FIFO
: '%s'",
(candidate !=
NULL) ? SD_task_get_name(candidate) : "NULL");
xbt_assert(candidate == candidates[i],
- "Error in __SD_task_just_done: bad first task in the
fifo
");
+ "Error in __SD_task_just_done: bad first task in the
FIFO
");
}
} /* for each workstation */
@@
-1270,7
+1289,9
@@
void __SD_task_just_done(SD_task_t task)
xbt_free(candidates);
}
-/* Remove all dependencies associated with a task. This function is called when the task is destroyed.
+/*
+ * Remove all dependencies associated with a task. This function is called
+ * when the task is destroyed.
*/
static void __SD_task_remove_dependencies(SD_task_t task)
{
@@
-1342,46
+1363,56
@@
void SD_task_distribute_comp_amdhal(SD_task_t task, int ws_count)
for(i=0;i<ws_count;i++){
task->computation_amount[i] =
-
(task->alpha + (1 - task->alpha)/ws_count) * task->amount;
+ (task->alpha + (1 - task->alpha)/ws_count) * task->amount;
}
}
+
/** @brief Auto-schedules a task.
*
* Auto-scheduling mean that the task can be used with SD_task_schedulev(). This
- * allows to specify the task costs at creation, and deco
relat
e them from the
+ * allows to specify the task costs at creation, and deco
upl
e them from the
* scheduling process where you just specify which resource should deliver the
* mandatory power.
*
- * To be auto-schedulable, a task must be created with SD_task_create_comm_e2e()
or
- *
SD_task_create_comp_seq(). Check their definitions for the exact semantic of each
- * of them.
+ * To be auto-schedulable, a task must be created with SD_task_create_comm_e2e()
+ *
or SD_task_create_comp_seq(). Check their definitions for the exact semantic
+ * of
each of
them.
*
* @todo
* We should create tasks kind for the following categories:
* - Point to point communication (done)
* - Sequential computation (done)
* - group communication (redistribution, several kinds)
- * - parallel tasks with no internal communication (one kind per speedup model such as amdal)
- * - idem+ internal communication. Task type not enough since we cannot store comm cost alongside to comp one)
+ * - parallel tasks with no internal communication (one kind per speedup
+ * model such as Amdahl)
+ * - idem+ internal communication. Task type not enough since we cannot store
+ * comm cost alongside to comp one)
*/
void SD_task_schedulev(SD_task_t task, int count,
const SD_workstation_t * list)
{
- int i;
+ int i
, j
;
SD_dependency_t dep;
unsigned int cpt;
xbt_assert(task->kind != 0,
"Task %s is not typed. Cannot automatically schedule it.",
SD_task_get_name(task));
switch (task->kind) {
- case SD_TASK_COMM_E2E:
case SD_TASK_COMP_PAR_AMDAHL:
- xbt_assert(task->computation_amount, "SD_task_distribute_comp_amdhal should be called first.");
+ SD_task_distribute_comp_amdhal(task, count);
+ case SD_TASK_COMM_E2E:
case SD_TASK_COMP_SEQ:
- xbt_assert(task->workstation_nb == count,"Got %d locations, but were expecting %d locations",count,task->workstation_nb);
+ xbt_assert(task->workstation_nb == count,
+ "Got %d locations, but were expecting %d locations",
+ count,task->workstation_nb);
for (i = 0; i < count; i++)
task->workstation_list[i] = list[i];
+ if (SD_task_get_kind(task)== SD_TASK_COMP_SEQ && !task->computation_amount){
+ /*This task has failed and is rescheduled. Reset the computation amount*/
+ task->computation_amount = xbt_new0(double, 1);
+ task->computation_amount[0] = task->remains;
+ }
SD_task_do_schedule(task);
break;
default:
@@
-1396,14
+1427,9
@@
void SD_task_schedulev(SD_task_t task, int count,
task->communication_amount[2]);
}
- if (task->kind == SD_TASK_COMP_PAR_AMDAHL) {
- XBT_VERB("Schedule computation task %s on %d hosts. It costs %.f flops on each host",
- SD_task_get_name(task),
- task->workstation_nb,
- task->computation_amount[0]);
- }
-
- /* Iterate over all childs and parent being COMM_E2E to say where I am located (and start them if runnable) */
+
+ /* Iterate over all children and parents being COMM_E2E to say where I am
+ * located (and start them if runnable) */
if (task->kind == SD_TASK_COMP_SEQ) {
XBT_VERB("Schedule computation task %s on %s. It costs %.f flops",
SD_task_get_name(task),
@@
-1432,7
+1458,6
@@
void SD_task_schedulev(SD_task_t task, int count,
SD_task_t after = dep->dst;
if (after->kind == SD_TASK_COMM_E2E) {
after->workstation_list[0] = task->workstation_list[0];
- //J-N : Why did you comment on these line (this comment add a bug I think)?
if (after->workstation_list[1]
&& (__SD_task_is_not_scheduled(after)
|| __SD_task_is_schedulable(after))) {
@@
-1448,6
+1473,140
@@
void SD_task_schedulev(SD_task_t task, int count,
}
}
}
+ /* Iterate over all children and parents being MXN_1D_BLOCK to say where I am
+ * located (and start them if runnable) */
+ if (task->kind == SD_TASK_COMP_PAR_AMDAHL) {
+ XBT_VERB("Schedule computation task %s on %d workstations. %.f flops"
+ " will be distributed following Amdahl'Law",
+ SD_task_get_name(task), task->workstation_nb,
+ task->computation_amount[0]);
+ xbt_dynar_foreach(task->tasks_before, cpt, dep) {
+ SD_task_t before = dep->src;
+ if (before->kind == SD_TASK_COMM_PAR_MXN_1D_BLOCK){
+ if (!before->workstation_list){
+ XBT_VERB("Sender side of Task %s is not scheduled yet",
+ SD_task_get_name(before));
+ before->workstation_list = xbt_new0(SD_workstation_t, count);
+ before->workstation_nb = count;
+ XBT_VERB("Fill the workstation list with list of Task '%s'",
+ SD_task_get_name(task));
+ for (i=0;i<count;i++)
+ before->workstation_list[i] = task->workstation_list[i];
+ } else {
+ XBT_VERB("Build communication matrix for task '%s'",
+ SD_task_get_name(before));
+ int src_nb, dst_nb;
+ double src_start, src_end, dst_start, dst_end;
+ src_nb = before->workstation_nb;
+ dst_nb = count;
+ before->workstation_list = (SD_workstation_t*) xbt_realloc(
+ before->workstation_list,
+ (before->workstation_nb+count)*sizeof(s_SD_workstation_t));
+ for(i=0; i<count; i++)
+ before->workstation_list[before->workstation_nb+i] =
+ task->workstation_list[i];
+
+ before->workstation_nb += count;
+
+ before->computation_amount = xbt_new0(double,
+ before->workstation_nb);
+ before->communication_amount = xbt_new0(double,
+ before->workstation_nb*
+ before->workstation_nb);
+
+ for(i=0;i<src_nb;i++){
+ src_start = i*before->amount/src_nb;
+ src_end = src_start + before->amount/src_nb;
+ for(j=0; j<dst_nb; j++){
+ dst_start = j*before->amount/dst_nb;
+ dst_end = dst_start + before->amount/dst_nb;
+ XBT_VERB("(%s->%s): (%.2f, %.2f)-> (%.2f, %.2f)",
+ SD_workstation_get_name(before->workstation_list[i]),
+ SD_workstation_get_name(before->workstation_list[src_nb+j]),
+ src_start, src_end, dst_start, dst_end);
+ if ((src_end <= dst_start) || (dst_end <= src_start)) {
+ before->communication_amount[i*(src_nb+dst_nb)+src_nb+j]=0.0;
+ } else {
+ before->communication_amount[i*(src_nb+dst_nb)+src_nb+j] =
+ MIN(src_end, dst_end) - MAX(src_start, dst_start);
+ }
+ XBT_VERB("==> %.2f",
+ before->communication_amount[i*(src_nb+dst_nb)+src_nb+j]);
+ }
+ }
+
+ if (__SD_task_is_schedulable(before) ||
+ __SD_task_is_not_scheduled(before)) {
+ SD_task_do_schedule(before);
+ XBT_VERB
+ ("Auto-Schedule redistribution task %s. Send %.f bytes from %d hosts to %d hosts.",
+ SD_task_get_name(before),before->amount, src_nb, dst_nb);
+ }
+ }
+ }
+ }
+ xbt_dynar_foreach(task->tasks_after, cpt, dep) {
+ SD_task_t after = dep->dst;
+ if (after->kind == SD_TASK_COMM_PAR_MXN_1D_BLOCK){
+ if (!after->workstation_list){
+ XBT_VERB("Receiver side of Task '%s' is not scheduled yet",
+ SD_task_get_name(after));
+ after->workstation_list = xbt_new0(SD_workstation_t, count);
+ after->workstation_nb = count;
+ XBT_VERB("Fill the workstation list with list of Task '%s'",
+ SD_task_get_name(task));
+ for (i=0;i<count;i++)
+ after->workstation_list[i] = task->workstation_list[i];
+ } else {
+ int src_nb, dst_nb;
+ double src_start, src_end, dst_start, dst_end;
+ src_nb = count;
+ dst_nb = after->workstation_nb;
+ after->workstation_list = (SD_workstation_t*) xbt_realloc(
+ after->workstation_list,
+ (after->workstation_nb+count)*sizeof(s_SD_workstation_t));
+ for(i=after->workstation_nb - 1; i>=0; i--)
+ after->workstation_list[count+i] = after->workstation_list[i];
+ for(i=0; i<count; i++)
+ after->workstation_list[i] = task->workstation_list[i];
+
+ after->workstation_nb += count;
+
+ after->computation_amount = xbt_new0(double, after->workstation_nb);
+ after->communication_amount = xbt_new0(double,
+ after->workstation_nb*
+ after->workstation_nb);
+
+ for(i=0;i<src_nb;i++){
+ src_start = i*after->amount/src_nb;
+ src_end = src_start + after->amount/src_nb;
+ for(j=0; j<dst_nb; j++){
+ dst_start = j*after->amount/dst_nb;
+ dst_end = dst_start + after->amount/dst_nb;
+ XBT_VERB("(%d->%d): (%.2f, %.2f)-> (%.2f, %.2f)",
+ i, j, src_start, src_end, dst_start, dst_end);
+ if ((src_end <= dst_start) || (dst_end <= src_start)) {
+ after->communication_amount[i*(src_nb+dst_nb)+src_nb+j]=0.0;
+ } else {
+ after->communication_amount[i*(src_nb+dst_nb)+src_nb+j] =
+ MIN(src_end, dst_end)- MAX(src_start, dst_start);
+ }
+ XBT_VERB("==> %.2f",
+ after->communication_amount[i*(src_nb+dst_nb)+src_nb+j]);
+ }
+ }
+
+ if (__SD_task_is_schedulable(after) ||
+ __SD_task_is_not_scheduled(after)) {
+ SD_task_do_schedule(after);
+ XBT_VERB
+ ("Auto-Schedule redistribution task %s. Send %.f bytes from %d hosts to %d hosts.",
+ SD_task_get_name(after),after->amount, src_nb, dst_nb);
+ }
+ }
+ }
+ }
+ }
}
/** @brief autoschedule a task on a list of workstations