src/gpu-compute/dyn_pool_manager.hh

/*
 * Copyright (c) 2020 Advanced Micro Devices, Inc.
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#ifndef __DYN_POOL_MANAGER_HH__
#define __DYN_POOL_MANAGER_HH__

#include <cassert>
#include <cstdint>

#include "gpu-compute/pool_manager.hh"
#include "params/DynPoolManager.hh"

namespace gem5
{

// Dynamic Pool Manager: allows multiple WGs on the same pool
class DynPoolManager : public PoolManager
{
  public:
    DynPoolManager(const PoolManagerParams &p)
        : PoolManager(p), _regionSize(0)
    {
        _totRegSpaceAvailable = p.pool_size;
    }

    uint32_t allocateRegion(const uint32_t size, uint32_t *reservedPoolSize) override;
    bool canAllocate(uint32_t numRegions, uint32_t size) override;
    void freeRegion(uint32_t firstIdx, uint32_t lastIdx) override;
    uint32_t minAllocatedElements(uint32_t size);
    std::string printRegion() override;
    uint32_t regionSize(std::pair<uint32_t,uint32_t> &region) override;
    void resetRegion(const int & regsPerSimd) override;

  private:
    // actual size of a region (normalized to the minimum size that can
    // be reserved)
    uint32_t _regionSize;
    // total registers available - across chunks
    uint32_t _totRegSpaceAvailable;
    // regIndex and freeSpace record
    std::list<std::pair<int,int>> freeSpaceRecord;
    int reservedSpaceRecord;
    // total registers to be allocated -- treat as a const
    int totalRegSpace;
};

} // namespace gem5

#endif // __DYN_POOL_MANAGER_HH__