- Adding support for cudaFuncSetCacheConfig API, that allows changing the

      L1 Cache and Shared Memory configurations across kernels. The support
      enable the user to specify two more configurations (Preferred L1) or
      (Preferred Shared Memory) besides the default config. If the
      cudaFuncSetCacheConfig API is used to set the cache configuration
      of a specific kernel to either of these configuration (cudaFuncCachePreferShared,
      cudaFuncCachePreferL1), the simulator will change the cache configuration
      at kernel launch accordingly, if there is no alternative configurations
      provided to the simulator it will use the default configurations with a
      warning message display

[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 15816]

1 files changed, 12 insertions, 4 deletions

diff --git a/src/gpgpu-sim/gpu-cache.cc b/src/gpgpu-sim/gpu-cache.cc
index d5856aa..3d8d911 100644
--- a/src/gpgpu-sim/gpu-cache.cc
+++ b/src/gpgpu-sim/gpu-cache.cc
@@ -29,6 +29,9 @@
 #include "stat-tool.h"
 #include <assert.h>
 
+#define MAX_DEFAULT_CACHE_SIZE_MULTIBLIER 4
+// used to allocate memory that is large enough to adapt the changes in cache size across kernels
+
 const char * cache_request_status_str(enum cache_request_status status) 
 {
    static const char * static_cache_request_status_str[] = {
@@ -45,7 +48,7 @@ const char * cache_request_status_str(enum cache_request_status status)
 }
 
 void l2_cache_config::init(linear_to_raw_address_translation *address_mapping){
-	cache_config::init();
+	cache_config::init(m_config_string);
 	m_address_mapping = address_mapping;
 }
 
@@ -64,7 +67,7 @@ tag_array::~tag_array()
     delete[] m_lines;
 }
 
-tag_array::tag_array( const cache_config &config,
+tag_array::tag_array( cache_config &config,
                       int core_id,
                       int type_id,
                       cache_block_t* new_lines)
@@ -74,13 +77,18 @@ tag_array::tag_array( const cache_config &config,
     init( core_id, type_id );
 }
 
-tag_array::tag_array( const cache_config &config,
+void tag_array::update_cache_parameters(cache_config &config)
+{
+	m_config=config;
+}
+
+tag_array::tag_array( cache_config &config,
                       int core_id,
                       int type_id )
     : m_config( config )
 {
     //assert( m_config.m_write_policy == READ_ONLY ); Old assert
-    m_lines = new cache_block_t[ config.get_num_lines()];
+    m_lines = new cache_block_t[MAX_DEFAULT_CACHE_SIZE_MULTIBLIER*config.get_num_lines()];
     init( core_id, type_id );
 }