From 2f190971f5f952f55197d385c688667439bc6649 Mon Sep 17 00:00:00 2001
From: Davit Grigoryan <ggc.language@gmail.com>
Date: Mon, 27 Apr 2026 02:10:06 +0000
Subject: add debug scoreboard stats counting

---
 src/gpgpu-sim/scoreboard.h | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'src/gpgpu-sim/scoreboard.h')

diff --git a/src/gpgpu-sim/scoreboard.h b/src/gpgpu-sim/scoreboard.h
index 9bf51e6..1de81dd 100644
--- a/src/gpgpu-sim/scoreboard.h
+++ b/src/gpgpu-sim/scoreboard.h
@@ -28,7 +28,9 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <map>
 #include <set>
+#include <utility>
 #include <vector>
 #include "assert.h"
 
@@ -56,6 +58,12 @@ class Scoreboard {
   bool checkCollisionSecondary(unsigned wid, const inst_t *inst) const;
   void clearSecondary(unsigned wid);
 
+ public:
+  // Accounting / leak-detection (called from gpu-sim end-of-run dump).
+  // Aggregates reserve/release counts, reservation-duration histogram,
+  // and any registers still reserved at the end of simulation.
+  void dumpAccounting(FILE *out) const;
+
  private:
   void reserveRegister(unsigned wid, unsigned regnum);
   int get_sid() const { return m_sid; }
@@ -72,6 +80,29 @@ class Scoreboard {
   std::vector<std::set<unsigned> > sec_reg_table;
 
   class gpgpu_t *m_gpu;
+
+  // ---- Accounting (per-shader, scalar; cheap to update) ----
+  // primary reg_table activity
+  unsigned long long m_primary_reserve_calls;   // reserveRegister insertions
+  unsigned long long m_primary_release_calls;   // releaseRegister erases
+  // secondary sec_reg_table activity
+  unsigned long long m_sec_reserve_calls;
+  unsigned long long m_sec_release_calls;
+  unsigned long long m_sec_clear_calls;         // clearSecondary invocations
+  unsigned long long m_sec_clear_regs_dropped;  // total regs cleared by clearSecondary
+  // duration tracking — sum of (release_cycle - reserve_cycle) over all completed reservations
+  unsigned long long m_primary_total_duration_cycles;
+  unsigned long long m_primary_completed_reservations;
+  unsigned long long m_primary_max_duration_cycles;
+  unsigned long long m_sec_total_duration_cycles;
+  unsigned long long m_sec_completed_reservations;
+  unsigned long long m_sec_max_duration_cycles;
+  // reservation timestamp lookup: (wid,reg) -> cycle_reserved
+  // typedef std::map<std::pair<unsigned,unsigned>, unsigned long long> resv_map_t;
+  std::map<std::pair<unsigned, unsigned>, unsigned long long>
+      m_primary_resv_cycle;
+  std::map<std::pair<unsigned, unsigned>, unsigned long long>
+      m_sec_resv_cycle;
 };
 
 #endif /* SCOREBOARD_H_ */
-- 
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