correct the code section to decide bypass, rather than global bypass

Author: cwpeng0511

src/gpgpu-sim/gpu-cache.cc

@@ -624,7 +624,10 @@ void tag_array::fill(new_addr_type addr, unsigned time, //on-fill
 
   bool isBypassed = false;
   int threshold = 8; // From SDBP paper
-  if(l1d_prediction_table[get_hashed_pc_from_tag(addr,NULL)] >= threshold){
+  // if(l1d_prediction_table[get_hashed_pc_from_tag(addr,NULL)] >= threshold){
+  //   isBypassed = true;
+  // }
+  if(l1d_prediction_table[hashed_pc] >= threshold){
     isBypassed = true;
   }
 
@@ -638,6 +641,9 @@ void tag_array::fill(new_addr_type addr, unsigned time, //on-fill
   bool before = m_lines[idx]->is_modified_line();
   // assert(status==MISS||status==SECTOR_MISS); // MSHR should have prevented
   // redundant memory request
+
+  if(!isBypassed){ // cwpeng
+
   if (status == MISS) {
     m_lines[idx]->allocate(m_config.tag(addr), m_config.block_addr(addr), time,
                            mask);
@@ -653,6 +659,11 @@ void tag_array::fill(new_addr_type addr, unsigned time, //on-fill
   if (m_lines[idx]->is_modified_line() && !before) {
     m_dirty++;
   }
+
+  }
+  else{
+    printf("Bypass L1D due to high miss rate prediction pc:%u, pred:%u\n", hashed_pc, l1d_prediction_table[hashed_pc]);
+  }
 }
 
 void tag_array::fill(unsigned index, unsigned time, mem_fetch *mf) { //on-miss

src/gpgpu-sim/shader.cc

@@ -2879,10 +2879,10 @@ void ldst_unit::cycle() {
                    mf->get_access_type() ==
                        GLOBAL_ACC_W) {  // global memory access
           if (m_core->get_config()->gmem_skip_L1D) bypassL1D = true;
-          if (m_L1D->prediction_table[temp_pc] >= 8 && mf->get_access_type() == GLOBAL_ACC_R){
-            bypassL1D = true;
-            printf("Bypass L1D due to high miss rate prediction pc:%u, pred:%u\n", temp_pc, m_L1D->prediction_table[temp_pc]);
-          }
+          // if (m_L1D->prediction_table[temp_pc] >= 8 && mf->get_access_type() == GLOBAL_ACC_R){
+          //   bypassL1D = true;
+          //   printf("Bypass L1D due to high miss rate prediction pc:%u, pred:%u\n", temp_pc, m_L1D->prediction_table[temp_pc]);
+          // }
         }
         if (bypassL1D) {
           if (m_next_global == NULL) {