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[patch][rfa] "active" pin of sid-sched
- From: Dave Brolley <brolley at redhat dot com>
- To: sid at sources dot redhat dot com
- Date: Tue, 21 Oct 2003 13:14:46 -0400
- Subject: [patch][rfa] "active" pin of sid-sched
- Organization: Red Hat Canada, Ltd
Hi,
This patch modifies the sid-sched compont so that it only drives its
'active' pin when the threshold from being active to inactive is
crossed. This is mainly an optimization.
ok to commit?
Dave
2003-08-29 Dave Brolley <brolley@redhat.com>
* compSched.cxx (operator <<): Stream active_pin.
(operator >>): Ditto.
(active_pin): New member of scheduler_component.
(advance): Drive active_pin with 1 or 0 as the enable
threshold is crossed.
(scheduler_component): Add "active_pin".
(sid-sched.xml): Document "active" pin and interaction between
"enabled?" and "enable-threshold".
(sid-sched.txt): Regenerated.
Index: sid/component/sched/compSched.cxx
===================================================================
RCS file: /cvs/src/src/sid/component/sched/compSched.cxx,v
retrieving revision 1.11
diff -c -p -r1.11 compSched.cxx
*** sid/component/sched/compSched.cxx 29 Aug 2003 20:22:01 -0000 1.11
--- sid/component/sched/compSched.cxx 21 Oct 2003 17:03:57 -0000
*************** operator << (ostream& o, const scheduler
*** 1215,1220 ****
--- 1215,1221 ----
o << "scheduler-state "
<< it.enable_threshold << " "
<< it.enable_p << " "
+ << it.active_p << " "
<< it.yield_host_time_threshold << " "
<< it.yield_host_time_p << " "
<< it.sched.step_cycle_limit << " " // this is a component attribute
*************** operator >> (istream& i, scheduler_compo
*** 1261,1266 ****
--- 1262,1268 ----
{
i >> it.enable_threshold
>> it.enable_p
+ >> it.active_p
>> it.yield_host_time_threshold
>> it.yield_host_time_p
>> it.sched.step_cycle_limit
*************** class scheduler_component: public schedu
*** 1335,1340 ****
--- 1337,1343 ----
int enable_p;
int yield_host_time_threshold;
int yield_host_time_p;
+ bool active_p;
host_int_8 advance_count;
callback_pin<this_t> advance_pin;
callback_pin<this_t> time_query_pin;
*************** protected:
*** 1396,1403 ****
<< this->yield_host_time_threshold << endl;
#endif
// Drive the active pin if the threshold has been crossed.
! if (this->active_pin.recall() != 1)
! this->active_pin.drive(1);
this->advance_count ++;
this->sched.advance (this->yield_host_time_p >= this->yield_host_time_threshold);
--- 1399,1409 ----
<< this->yield_host_time_threshold << endl;
#endif
// Drive the active pin if the threshold has been crossed.
! if (UNLIKELY(! this->active_p))
! {
! this->active_pin.drive (1);
! this->active_p = true;
! }
this->advance_count ++;
this->sched.advance (this->yield_host_time_p >= this->yield_host_time_threshold);
*************** protected:
*** 1405,1412 ****
else
{
// Drive the active pin if the threshold has been crossed.
! if (this->active_pin.recall() != 0)
! this->active_pin.drive(0);
}
}
--- 1411,1421 ----
else
{
// Drive the active pin if the threshold has been crossed.
! if (UNLIKELY(this->active_p))
! {
! this->active_pin.drive (0);
! this->active_p = false;
! }
}
}
*************** public:
*** 1444,1450 ****
clients(0),
num_clients(0),
enable_threshold(1),
! enable_p(1),
yield_host_time_threshold(1),
yield_host_time_p(0),
advance_count(0),
--- 1453,1459 ----
clients(0),
num_clients(0),
enable_threshold(1),
! active_p(1),
yield_host_time_threshold(1),
yield_host_time_p(0),
advance_count(0),
*************** public:
*** 1452,1457 ****
--- 1461,1467 ----
time_query_pin(this, & scheduler_component::time_query),
yield_pin(this, & scheduler_component::yield_step_loop)
{
+ enable_p = enable_threshold;
scheduler_component_ctor_1();
scheduler_component_ctor_2();
scheduler_component_ctor_3();
Index: sid/component/sched/sid-sched.xml
===================================================================
RCS file: /cvs/src/src/sid/component/sched/sid-sched.xml,v
retrieving revision 1.5
diff -c -p -r1.5 sid-sched.xml
*** sid/component/sched/sid-sched.xml 29 Aug 2003 19:45:10 -0000 1.5
--- sid/component/sched/sid-sched.xml 21 Oct 2003 17:03:57 -0000
***************
*** 137,144 ****
<behavior name="advancing">
<p> When you have disabled the scheduler by setting the
! <attribute>enabled?</attribute> attribute to a value less than enable-threshold,
! advancing as described below, does not occur.
</p>
<p> Whenever the <pin>advance</pin> input pin is driven, the scheduler
--- 137,144 ----
<behavior name="advancing">
<p> When you have disabled the scheduler by setting the
! <attribute>enabled?</attribute> attribute to a value less than the <attribute>enable-threshold</attribute>
! attribute, advancing as described below, does not occur.
</p>
<p> Whenever the <pin>advance</pin> input pin is driven, the scheduler