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- Fix book-keeping of thread data fields 

- (temp) Add debug printout into text simulation of 
a thread acquiring time and release time. Will be removed
just after scheduler is fixed.


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@975 3ecf2c5c-341e-0410-92b4-d18e462d057c
This commit is contained in:
tchernobog 2006-08-31 18:16:11 +00:00
parent 1bc33d37ec
commit 5b7130a9a0
2 changed files with 33 additions and 8 deletions
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34
src/backend/scheduler.cc
View File

@ -18,6 +18,15 @@
// along with SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
/* DISCLAIMER FOR THE RAMPANT CODER: */
// ----------------------------------------------------\\
// ``If you touch this code, your ass is grass, \\
// and I'm the lawnmover.'' \\
// -- David Cutler \\
// ----------------------------------------------------\\
#include "concrete_environment.hh"
#include "concrete_history.hh"
#include "cpu_policy.hh"
@ -396,7 +405,7 @@ Scheduler::step_forward(History& history, CPUPolicy& cpu_policy, ResourcePolicy&
ConcreteHistory& concrete_history = static_cast<ConcreteHistory&>(history);
// Use an auto_ptr since we've some exceptions in the coming...
auto_ptr<ConcreteEnvironment> new_snapshot(new ConcreteEnvironment(concrete_history.get_last_environment()));
auto_ptr<ConcreteEnvironment> new_snapshot(new ConcreteEnvironment(concrete_history.get_environment_at(current_instant)));
Threads all_threads;
DynamicThread* running_thread = NULL;
@ -429,6 +438,7 @@ Scheduler::step_forward(History& history, CPUPolicy& cpu_policy, ResourcePolicy&
if (current.get_total_cpu_time() - current.get_elapsed_time() == 0)
{
current.set_state(Schedulable::state_terminated);
current.set_last_release(current_instant);
terminate_all_requests_of(current, *new_snapshot);
}
@ -497,7 +507,9 @@ Scheduler::step_forward(History& history, CPUPolicy& cpu_policy, ResourcePolicy&
time_slice == current_instant - running_thread->get_last_acquisition()) )
{
running_thread->set_state(Schedulable::state_ready);
running_thread->set_last_release(current_instant);
// We don't set the last_release parameter here. If necessary,
// we'll do that below, when selecting a new running thread,
// if it's different from the previous one.
}
@ -532,17 +544,14 @@ Scheduler::step_forward(History& history, CPUPolicy& cpu_policy, ResourcePolicy&
{
// Else, it's time to see if the first candidate can run
DynamicThread& candidate = (DynamicThread&) _ready_queue->get_item_at(0);
candidate.set_last_acquisition(current_instant);
// Even if it can run, we anyhow sets its release time to now, because
// it means its release time is *at least* the current_instant. This
// is needed for RR policies.
candidate.set_last_release(current_instant);
// If a thread has been created with duration "0" (silly, but possible);
// if you think it's safe, you can change this condition with an assert
// and delete the body of the ``if''.
if(candidate.get_total_cpu_time() - candidate.get_elapsed_time() == 0)
{
candidate.set_last_acquisition(current_instant);
candidate.set_last_release(current_instant);
candidate.set_state(Schedulable::state_terminated);
// Put every request of this thread to state_exhausted
terminate_all_requests_of(candidate, *new_snapshot);
@ -559,6 +568,7 @@ Scheduler::step_forward(History& history, CPUPolicy& cpu_policy, ResourcePolicy&
we_ve_got_a_winner /*!hurrah!*/ = true;
else // if blocked, we've to remove it from the ready queue
{
candidate.set_last_acquisition(current_instant);
_ready_queue->erase_first();
alive_threads--;
}
@ -572,6 +582,16 @@ Scheduler::step_forward(History& history, CPUPolicy& cpu_policy, ResourcePolicy&
// Fix fields of running thread
DynamicThread& new_running = (DynamicThread&) _ready_queue->get_item_at(0);
new_running.set_state(Schedulable::state_running);
// If the new running is different from the old one,
// remember to release our old pal, and to acquire our
// new runner.
if(&new_running != running_thread)
{
if(running_thread != NULL)
running_thread->set_last_release(current_instant);
new_running.set_last_acquisition(current_instant);
}
}
}

5
src/text_simulation.cc
View File

@ -1784,6 +1784,11 @@ TextSimulation::update(const Simulation& changed_simulation)
oss << setw(fill1) << t.get_total_cpu_time();
oss << setw(fill1) << t.get_elapsed_time();
oss << setw(fill1) << t.get_current_priority();
// FIXME: temporary debug code. Remove me when done.
oss << setw(fill1 / 2) << t.get_last_acquisition();
oss << setw(fill1 / 2) << t.get_last_release();
oss << endl;
p_stdout(oss.str());