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// $Id$
#include "Util_Thread.h"
ACE_RCSID(MT_Cubit, Util_Thread, "$Id$")
Util_Thread::Util_Thread (Task_State *ts,
ACE_Thread_Manager *thr_mgr)
: ACE_MT (ACE_Task<ACE_NULL_SYNCH> (thr_mgr)),
done_ (0),
number_of_computations_ (0),
ts_ (ts)
{
}
int
Util_Thread::svc (void)
{
ACE_hthread_t thr_handle;
ACE_Thread::self (thr_handle);
int prio;
// thr_getprio () on the current thread should never fail.
ACE_OS::thr_getprio (thr_handle, prio);
ACE_DEBUG ((LM_DEBUG,
"(%t) Utilization Thread created with priority %d, "
"waiting for threads to finish binding\n", prio));
// this barrier synchronizes the utilization thread with
// the client threads
// i.e., the Util_thread should wait until all the
// clients have finished binding, and only then
// start measuring the utilization.
this->ts_->barrier_->wait ();
ACE_DEBUG ((LM_DEBUG,
"(%t) )))))))) "
"utilization test STARTED at %D\n"));
this->ts_->utilization_task_started_ = 1;
this->ts_->timer_.start ();
this->run_computations ();
this->ts_->timer_.stop ();
ACE_DEBUG ((LM_DEBUG,
"(%t) (((((((( "
"utilization test ENDED at %D\n"));
return 0;
}
u_long
Util_Thread::get_number_of_computations (void)
{
return this->number_of_computations_;
}
// computation performed by the Utilization thread. We need this in a
// separate function to get it's execution time.
//inline
void
Util_Thread::computation (void)
{
// This is the number that the Util_Thread uses to check for
// primality.
const u_long CUBIT_PRIME_NUMBER = 509UL;
// See if this number is prime. 2 and CUBIT_PRIME_NUMBER / 2 are
// the recommended values for min_factor and max_factor, as
// explained in ACE.h (is_prime).
ACE::is_prime (CUBIT_PRIME_NUMBER,
2UL,
CUBIT_PRIME_NUMBER / 2);
}
// Perform repeated prime factor computations on an arbitrary number.
// And you thought your life was boring... :-)
int
Util_Thread::run_computations (void)
{
while (this->done_ == 0)
{
// bound the number of computations, since we can potentially
// block the machine if this thread never leaves the loop.
if (this->number_of_computations_ > (ts_->loop_count_ * 1000)) // magic number
{
ACE_DEBUG ((LM_DEBUG,
"\t(%t) utilization test breaking loop so machine won't block.\n"));
break;
}
this->computation ();
this->number_of_computations_ ++;
// ACE_OS::thr_yield (); // Shouldn't need this. And I'm not sure
// if it really helps.
if (ts_->utilization_task_started_ == 0)
break;
}
return 0;
}
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