Add cache statistics

1 files changed, 8 insertions, 2 deletions

diff --git a/qtmips_machine/cache.h b/qtmips_machine/cache.h
index d7bd967..6cf3a2c 100644
--- a/qtmips_machine/cache.h
+++ b/qtmips_machine/cache.h
@@ -11,7 +11,7 @@ namespace machine {
 class Cache : public MemoryAccess {
     Q_OBJECT
 public:
-    Cache(Memory *m, const MachineConfigCache *c);
+    Cache(Memory *m, const MachineConfigCache *c, unsigned memory_access_penalty_r = 1, unsigned memory_access_penalty_w = 1);
 
     void wword(std::uint32_t address, std::uint32_t value);
     std::uint32_t rword(std::uint32_t address) const;
@@ -21,6 +21,9 @@ public:
 
     unsigned hit() const; // Number of recorded hits
     unsigned miss() const; // Number of recorded misses
+    unsigned stalled_cycles() const; // Number of wasted cycles in memory waitin statistic
+    double speed_improvement() const; // Speed improvement in percents in comare with no used cache
+    double usage_efficiency() const; // Usage efficiency in percents
 
     void reset(); // Reset whole state of cache
 
@@ -29,11 +32,13 @@ public:
 signals:
     void hit_update(unsigned) const;
     void miss_update(unsigned) const;
+    void statistics_update(unsigned stalled_cycles, double speed_improv, double usage_effic) const;
     void cache_update(unsigned associat, unsigned set, bool valid, bool dirty, std::uint32_t tag, const std::uint32_t *data) const;
 
 private:
     MachineConfigCache cnf;
     Memory *mem;
+    unsigned access_pen_r, access_pen_w;
 
     struct cache_data {
         bool valid, dirty;
@@ -47,11 +52,12 @@ private:
         unsigned **lfu; // Access count
     } replc; // Data used for replacement policy
 
-    mutable unsigned hitc, missc; // Hit and miss counters
+    mutable unsigned hit_read, miss_read, hit_write, miss_write; // Hit and miss counters
 
     void access(std::uint32_t address, std::uint32_t *data, bool write, std::uint32_t value = 0) const;
     void kick(unsigned associat_indx, unsigned row) const;
     std::uint32_t base_address(std::uint32_t tag, unsigned row) const;
+    void update_statistics() const;
 };
 
 }