src/gpu-compute/schedule_stage.hh

   1 /*
   2  * Copyright (c) 2014-2015 Advanced Micro Devices, Inc.
   3  * All rights reserved.
   4  *
   5  * For use for simulation and test purposes only
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright notice,
  11  * this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright notice,
  14  * this list of conditions and the following disclaimer in the documentation
  15  * and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the copyright holder nor the names of its contributors
  18  * may be used to endorse or promote products derived from this software
  19  * without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  * Author: Sooraj Puthoor
  34  */
  35
  36 #ifndef __SCHEDULE_STAGE_HH__
  37 #define __SCHEDULE_STAGE_HH__
  38
  39 #include <utility>
  40 #include <vector>
  41
  42 #include "gpu-compute/exec_stage.hh"
  43 #include "gpu-compute/scheduler.hh"
  44 #include "gpu-compute/scoreboard_check_stage.hh"
  45
  46 // Schedule or execution arbitration stage.
  47 // From the pool of ready waves in the ready list,
  48 // one wave is selected for each execution resource.
  49 // The selection is made based on a scheduling policy
  50
  51 class ComputeUnit;
  52 class Wavefront;
  53
  54 struct ComputeUnitParams;
  55
  56 class ScheduleStage
  57 {
  58   public:
  59     ScheduleStage(const ComputeUnitParams *params);
  60     ~ScheduleStage();
  61     void init(ComputeUnit *cu);
  62     void exec();
  63     void arbitrate();
  64     // Stats related variables and methods
  65     std::string name() { return _name; }
  66     void regStats();
  67
  68   private:
  69     ComputeUnit *computeUnit;
  70     uint32_t numSIMDs;
  71     uint32_t numMemUnits;
  72
  73     // Each execution resource will have its own
  74     // scheduler and a dispatch list
  75     std::vector<Scheduler> scheduler;
  76
  77     // Stores the status of waves. A READY implies the
  78     // wave is ready to be scheduled this cycle and
  79     // is already present in the readyList
  80     std::vector<std::vector<std::pair<Wavefront*, WAVE_STATUS>>*>
  81         waveStatusList;
  82
  83     // List of waves which will be dispatched to
  84     // each execution resource. A FILLED implies
  85     // dispatch list is non-empty and
  86     // execution unit has something to execute
  87     // this cycle. Currently, the dispatch list of
  88     // an execution resource can hold only one wave because
  89     // an execution resource can execute only one wave in a cycle.
  90     std::vector<std::pair<Wavefront*, DISPATCH_STATUS>> *dispatchList;
  91
  92     std::string _name;
  93 };
  94
  95 #endif // __SCHEDULE_STAGE_HH__