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authorNilay Vaish <nilay@cs.wisc.edu>2012-01-05 11:02:56 -0600
committerNilay Vaish <nilay@cs.wisc.edu>2012-01-05 11:02:56 -0600
commitdaa4c7526acf97bf53b1cdfc6a4d6a327f1966dd (patch)
tree30c1b54ea6e0acb2f8c2fc2c2c65c3a07935a1e3
parentd3aa01eed9972bf1e20e3a6888b27f648a4730da (diff)
downloadgem5-daa4c7526acf97bf53b1cdfc6a4d6a327f1966dd.tar.xz
eventq: add a function for replacing head of the queue
This patch adds a function for replacing the event at the head of the queue with another event. This helps in running a different set of events. Events already scheduled can processed by replacing the original head event back. This function has been specifically added to support cache warmup and cooldown required for creating and restoring checkpoints. --HG-- extra : rebase_source : ed6e2905720b6bfdefd020fab76235ccf33d28d1
-rw-r--r--src/sim/eventq.cc8
-rw-r--r--src/sim/eventq.hh10
2 files changed, 18 insertions, 0 deletions
diff --git a/src/sim/eventq.cc b/src/sim/eventq.cc
index 78524fe51..b389efcf2 100644
--- a/src/sim/eventq.cc
+++ b/src/sim/eventq.cc
@@ -373,6 +373,14 @@ EventQueue::debugVerify() const
return true;
}
+Event*
+EventQueue::replaceHead(Event* s)
+{
+ Event* t = head;
+ head = s;
+ return t;
+}
+
void
dumpMainQueue()
{
diff --git a/src/sim/eventq.hh b/src/sim/eventq.hh
index 1509d05a5..6dc25e760 100644
--- a/src/sim/eventq.hh
+++ b/src/sim/eventq.hh
@@ -408,6 +408,16 @@ class EventQueue : public Serializable
bool debugVerify() const;
+ /**
+ * function for replacing the head of the event queue, so that a
+ * different set of events can run without disturbing events that have
+ * already been scheduled. Already scheduled events can be processed
+ * by replacing the original head back.
+ * USING THIS FUNCTION CAN BE DANGEROUS TO THE HEALTH OF THE SIMULATOR.
+ * NOT RECOMMENDED FOR USE.
+ */
+ Event* replaceHead(Event* s);
+
#ifndef SWIG
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string &section);