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systemc: Fix the priority of the maximum time event.

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Change-Id: I3e5e71165d06da77076f0e58012c575e24456182
Reviewed-on: https://gem5-review.googlesource.com/12209
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
This commit is contained in:
Gabe Black
2018-08-15 19:16:41 -07:00
parent e1e02e91e0
commit 82958266d4
1 changed files with 10 additions and 7 deletions
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17
src/systemc/core/scheduler.hh
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@@ -129,11 +129,14 @@ typedef NodeList<Channel> ChannelList;
* MAX RUN TIME
*
* When sc_start is called, it's possible to pass in a maximum time the
* simulation should run to, at which point sc_pause is implicitly called.
* That's implemented by scheduling an event at the max time with a priority
* which is lower than all the others so that it happens only if time would
* advance. When that event triggers, it calls the same function as the pause
* event.
* simulation should run to, at which point sc_pause is implicitly called. The
* simulation is supposed to run up to the latest timed notification phase
* which is less than or equal to the maximum time. In other words it should
* run timed notifications at the maximum time, but not the subsequent evaluate
* phase. That's implemented by scheduling an event at the max time with a
* priority which is lower than all the others except the ready event. Timed
* notifications will happen before it fires, but it will override any ready
* event and prevent the evaluate phase from starting.
*/
class Scheduler
@@ -279,9 +282,9 @@ class Scheduler
static Priority StopPriority = DefaultPriority - 1;
static Priority PausePriority = DefaultPriority + 1;
static Priority ReadyPriority = DefaultPriority + 2;
static Priority MaxTickPriority = DefaultPriority + 2;
static Priority ReadyPriority = DefaultPriority + 3;
static Priority StarvationPriority = ReadyPriority;
static Priority MaxTickPriority = DefaultPriority + 3;
EventQueue *eq;
std::map<Tick, int> pendingTicks;