Merge pull request #1 from gpgpu-sim/dev

Dev

1 files changed, 130 insertions, 0 deletions

diff --git a/src/gpgpu-sim/local_interconnect.h b/src/gpgpu-sim/local_interconnect.h
new file mode 100644
index 0000000..29cd903
--- /dev/null
+++ b/src/gpgpu-sim/local_interconnect.h
@@ -0,0 +1,130 @@
+// Copyright (c) 2019, Mahmoud Khairy
+// Purdue University
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// Redistributions of source code must retain the above copyright notice, this
+// list of conditions and the following disclaimer.
+// Redistributions in binary form must reproduce the above copyright notice,
+// this list of conditions and the following disclaimer in the documentation
+// and/or other materials provided with the distribution. Neither the name of
+// The University of British Columbia nor the names of its contributors may be
+// used to endorse or promote products derived from this software without
+// specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef _LOCAL_INTERCONNECT_HPP_
+#define _LOCAL_INTERCONNECT_HPP_
+
+#include <iostream>
+#include <map>
+#include <queue>
+#include <vector>
+using namespace std;
+
+enum Interconnect_type { REQ_NET = 0, REPLY_NET = 1 };
+
+enum Arbiteration_type { NAIVE_RR = 0, iSLIP = 1 };
+
+struct inct_config {
+  // config for local interconnect
+  unsigned in_buffer_limit;
+  unsigned out_buffer_limit;
+  unsigned subnets;
+  Arbiteration_type arbiter_algo;
+};
+
+class xbar_router {
+ public:
+  xbar_router(unsigned router_id, enum Interconnect_type m_type,
+              unsigned n_shader, unsigned n_mem, unsigned m_in_buffer_limit,
+              unsigned m_out_buffer_limit, enum Arbiteration_type m_arbit_type);
+  ~xbar_router();
+  void Push(unsigned input_deviceID, unsigned output_deviceID, void* data,
+            unsigned int size);
+  void* Pop(unsigned ouput_deviceID);
+  void Advance();
+
+  bool Busy() const;
+  bool Has_Buffer_In(unsigned input_deviceID, unsigned size,
+                     bool update_counter = false);
+  bool Has_Buffer_Out(unsigned output_deviceID, unsigned size);
+
+  // some stats
+  unsigned long long cycles;
+  unsigned long long conflicts;
+  unsigned long long out_buffer_full;
+  unsigned long long out_buffer_util;
+  unsigned long long in_buffer_full;
+  unsigned long long in_buffer_util;
+  unsigned long long packets_num;
+
+ private:
+  void iSLIP_Advance();
+  void RR_Advance();
+
+  struct Packet {
+    Packet(void* m_data, unsigned m_output_deviceID) {
+      data = m_data;
+      output_deviceID = m_output_deviceID;
+    }
+    void* data;
+    unsigned output_deviceID;
+  };
+  vector<queue<Packet> > in_buffers;
+  vector<queue<Packet> > out_buffers;
+  unsigned _n_shader, _n_mem, total_nodes;
+  unsigned in_buffer_limit, out_buffer_limit;
+  vector<unsigned> next_node;  // used for iSLIP arbit
+  unsigned next_node_id;       // used for RR arbit
+  unsigned m_id;
+  enum Interconnect_type router_type;
+  unsigned active_in_buffers, active_out_buffers;
+  Arbiteration_type arbit_type;
+
+  friend class LocalInterconnect;
+};
+
+class LocalInterconnect {
+ public:
+  LocalInterconnect(const struct inct_config& m_localinct_config);
+  ~LocalInterconnect();
+  static LocalInterconnect* New(const struct inct_config& m_inct_config);
+  void CreateInterconnect(unsigned n_shader, unsigned n_mem);
+
+  // node side functions
+  void Init();
+  void Push(unsigned input_deviceID, unsigned output_deviceID, void* data,
+            unsigned int size);
+  void* Pop(unsigned ouput_deviceID);
+  void Advance();
+  bool Busy() const;
+  bool HasBuffer(unsigned deviceID, unsigned int size) const;
+  void DisplayStats() const;
+  void DisplayOverallStats() const;
+  unsigned GetFlitSize() const;
+
+  void DisplayState(FILE* fp) const;
+
+ protected:
+  const inct_config& m_inct_config;
+
+  unsigned n_shader, n_mem;
+  unsigned n_subnets;
+  vector<xbar_router*> net;
+};
+
+#endif