commit 137b4993a4710a247d79cdc0194dfa107b080f98
author Gabe Black <gabeblack@google.com> Mon Oct 08 23:08:27 2018 -0700
committer Gabe Black <gabeblack@google.com> Tue Oct 16 01:15:18 2018 +0000
tree 60beae2c190cd3ce4dd12a3eb6d2bbdee4e3f83c
parent ae1ecec85aa090b90c09cc126a32b8dfa810c94d

systemc: Don't re-schedule a process which is already scheduled.

Change-Id: I8e12713c49aad03d0bfb779883adcbfa8fd4b42e
Reviewed-on: https://gem5-review.googlesource.com/c/13334
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

src/systemc/core/process.cc

diff --git a/src/systemc/core/process.cc b/src/systemc/core/process.cc
index a0759d9..e29cee0 100644
--- a/src/systemc/core/process.cc
+++ b/src/systemc/core/process.cc
@@ -359,7 +359,7 @@
         return;
     if (suspended())
         _suspendedReady = true;
-    else
+    else if (!scheduled())
         scheduler.ready(this);
 }
 
@@ -381,9 +381,10 @@
     timeoutEvent([this]() { this->timeout(); }),
     func(func), _internal(internal), _timedOut(false), _dontInitialize(false),
     _needsStart(true), _isUnwinding(false), _terminated(false),
-    _suspended(false), _disabled(false), _syncReset(false), syncResetCount(0),
-    asyncResetCount(0), _waitCount(0), refCount(0),
-    stackSize(::Fiber::DefaultStackSize), dynamicSensitivity(nullptr)
+    _scheduled(false), _suspended(false), _disabled(false),
+    _syncReset(false), syncResetCount(0), asyncResetCount(0), _waitCount(0),
+    refCount(0), stackSize(::Fiber::DefaultStackSize),
+    dynamicSensitivity(nullptr)
 {
     _dynamic =
             (::sc_core::sc_get_status() >

src/systemc/core/process.hh

diff --git a/src/systemc/core/process.hh b/src/systemc/core/process.hh
index d50c829..12901bc 100644
--- a/src/systemc/core/process.hh
+++ b/src/systemc/core/process.hh
@@ -72,6 +72,9 @@
     void isUnwinding(bool v) { _isUnwinding = v; }
     bool terminated() const { return _terminated; }
 
+    bool scheduled() const { return _scheduled; }
+    void scheduled(bool new_val) { _scheduled = new_val; }
+
     void forEachKid(const std::function<void(Process *)> &work);
 
     bool suspended() const { return _suspended; }
@@ -172,6 +175,7 @@
     bool _dynamic;
     bool _isUnwinding;
     bool _terminated;
+    bool _scheduled;
 
     void terminate();
 

src/systemc/core/scheduler.cc

diff --git a/src/systemc/core/scheduler.cc b/src/systemc/core/scheduler.cc
index ec91c79..52bf7ec 100644
--- a/src/systemc/core/scheduler.cc
+++ b/src/systemc/core/scheduler.cc
@@ -165,6 +165,7 @@
         Fiber::primaryFiber()->run();
     } else {
         _current->popListNode();
+        _current->scheduled(false);
         // Switch to whatever Fiber is supposed to run this process. All
         // Fibers which aren't running should be parked at this line.
         _current->fiber()->run();
@@ -199,6 +200,8 @@
     if (_stopNow)
         return;
 
+    p->scheduled(true);
+
     if (p->procKind() == ::sc_core::SC_METHOD_PROC_)
         readyListMethods.pushLast(p);
     else