Adding option 'gpgpu_simt_core_sim_order' which allow the user to specify the order in which cores are simulator per cycle. Also adding support for calling function with empty parameter list.

[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 11489]

3 files changed, 14 insertions, 2 deletions

diff --git a/src/gpgpu-sim/gpu-sim.cc b/src/gpgpu-sim/gpu-sim.cc
index 3200c9c..bd77c7b 100644
--- a/src/gpgpu-sim/gpu-sim.cc
+++ b/src/gpgpu-sim/gpu-sim.cc
@@ -236,6 +236,9 @@ void shader_core_config::reg_options(class OptionParser * opp)
     option_parser_register(opp, "-gpgpu_max_insn_issue_per_warp", OPT_INT32, &gpgpu_max_insn_issue_per_warp,
                             "Max number of instructions that can be issued per warp in one cycle by scheduler",
                             "2");
+    option_parser_register(opp, "-gpgpu_simt_core_sim_order", OPT_INT32, &simt_core_sim_order,
+                            "Select the simulation order of cores in a cluster (0=Fix, 1=Round-Robin)",
+                            "1");
 }
 
 void gpgpu_sim_config::reg_options(option_parser_t opp)
diff --git a/src/gpgpu-sim/shader.cc b/src/gpgpu-sim/shader.cc
index 742d3c9..060dd07 100644
--- a/src/gpgpu-sim/shader.cc
+++ b/src/gpgpu-sim/shader.cc
@@ -2046,13 +2046,19 @@ simt_core_cluster::simt_core_cluster( class gpgpu_sim *gpu,
     for( unsigned i=0; i < config->n_simt_cores_per_cluster; i++ ) {
         unsigned sid = m_config->cid_to_sid(i,m_cluster_id);
         m_core[i] = new shader_core_ctx(gpu,this,sid,m_cluster_id,config,mem_config,stats);
+        m_core_sim_order.push_back(i); 
     }
 }
 
 void simt_core_cluster::core_cycle()
 {
-    for( unsigned i=0; i < m_config->n_simt_cores_per_cluster; i++ ) 
-        m_core[i]->cycle();
+    for( std::list<unsigned>::iterator it = m_core_sim_order.begin(); it != m_core_sim_order.end(); ++it ) {
+        m_core[*it]->cycle();
+    }
+
+    if (m_config->simt_core_sim_order == 1) {
+        m_core_sim_order.splice(m_core_sim_order.end(), m_core_sim_order, m_core_sim_order.begin()); 
+    }
 }
 
 void simt_core_cluster::reinit()
diff --git a/src/gpgpu-sim/shader.h b/src/gpgpu-sim/shader.h
index 1d86f02..759a58b 100644
--- a/src/gpgpu-sim/shader.h
+++ b/src/gpgpu-sim/shader.h
@@ -985,6 +985,8 @@ struct shader_core_config : public core_config
     unsigned n_simt_clusters;
     unsigned n_simt_ejection_buffer_size;
     unsigned ldst_unit_response_queue_size;
+
+    int simt_core_sim_order; 
     
     unsigned mem2device(unsigned memid) const { return memid + n_simt_clusters; }
 };
@@ -1275,6 +1277,7 @@ private:
     shader_core_ctx **m_core;
 
     unsigned m_cta_issue_next_core;
+    std::list<unsigned> m_core_sim_order;
     std::list<mem_fetch*> m_response_fifo;
 };