mem-cache: Make StridePrefetcher use Replacement Policies
Previously StridePrefetcher was only able to use random
replacement policy. This change allows all replacement
policies to be applied to the pc table.
Change-Id: I8714e71a6a4c9c31fbca49a07a456dcacd3e402c
Signed-off-by: Daniel <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/14360
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
diff --git a/src/mem/cache/prefetch/stride.hh b/src/mem/cache/prefetch/stride.hh
index 772c3a5..aa02287 100644
--- a/src/mem/cache/prefetch/stride.hh
+++ b/src/mem/cache/prefetch/stride.hh
@@ -1,4 +1,5 @@
/*
+ * Copyright (c) 2018 Inria
* Copyright (c) 2012-2013, 2015 ARM Limited
* All rights reserved
*
@@ -38,6 +39,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Ron Dreslinski
+ * Daniel Carvalho
*/
/**
@@ -54,8 +56,10 @@
#include "base/types.hh"
#include "mem/cache/prefetch/queued.hh"
+#include "mem/cache/replacement_policies/replaceable_entry.hh"
#include "mem/packet.hh"
+class BaseReplacementPolicy;
struct StridePrefetcherParams;
class StridePrefetcher : public QueuedPrefetcher
@@ -73,7 +77,10 @@
const int degree;
- struct StrideEntry
+ /** Replacement policy used in the PC tables. */
+ BaseReplacementPolicy* replacementPolicy;
+
+ struct StrideEntry : public ReplaceableEntry
{
/** Default constructor */
StrideEntry();
@@ -97,8 +104,10 @@
* @param assoc Associativity of the table.
* @param sets Number of sets in the table.
* @param name Name of the prefetcher.
+ * @param replacementPolicy Replacement policy used by the table.
*/
- PCTable(int assoc, int sets, const std::string name);
+ PCTable(int assoc, int sets, const std::string name,
+ BaseReplacementPolicy* replacementPolicy);
/**
* Default destructor.
@@ -124,12 +133,16 @@
private:
const std::string name() {return _name; }
- const int pcTableAssoc;
const int pcTableSets;
const std::string _name;
std::vector<std::vector<StrideEntry>> entries;
/**
+ * Replacement policy used by StridePrefetcher.
+ */
+ BaseReplacementPolicy* replacementPolicy;
+
+ /**
* PC hashing function to index sets in the table.
*
* @param pc The PC value.
