src/gpu-compute/simple_pool_manager.hh

   1 /*
   2  * Copyright (c) 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
  18  * contributors may be used to endorse or promote products derived from this
  19  * software 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
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef __SIMPLE_POOL_MANAGER_HH__
  35 #define __SIMPLE_POOL_MANAGER_HH__
  36
  37 #include <cassert>
  38 #include <cstdint>
  39
  40 #include "gpu-compute/pool_manager.hh"
  41 #include "params/SimplePoolManager.hh"
  42
  43 // Simple Pool Manager: allows one region per pool. No region merging is
  44 // supported.
  45 class SimplePoolManager : public PoolManager
  46 {
  47   public:
  48     SimplePoolManager(const PoolManagerParams *p)
  49         : PoolManager(p), _regionSize(0), _nxtFreeIdx(0),
  50           _reservedGroups(0)
  51     {
  52     }
  53
  54     uint32_t minAllocatedElements(uint32_t size);
  55     std::string printRegion();
  56     bool canAllocate(uint32_t numRegions, uint32_t size);
  57     uint32_t allocateRegion(const uint32_t size, uint32_t *reservedPoolSize);
  58     void freeRegion(uint32_t firstIdx, uint32_t lastIdx);
  59     uint32_t regionSize(std::pair<uint32_t,uint32_t> &region);
  60
  61   private:
  62     // actual size of a region (normalized to the minimum size that can
  63     // be reserved)
  64     uint32_t _regionSize;
  65     // next index to allocate a region
  66     int _nxtFreeIdx;
  67     // number of groups that reserve a region
  68     uint32_t _reservedGroups;
  69 };
  70
  71 #endif // __SIMPLE_POOL_MANAGER_HH__