109 lines
3.4 KiB
C++
109 lines
3.4 KiB
C++
/*
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* Copyright (c) 2015 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* For use for simulation and test purposes only
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Author: John Kalamatianos
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*/
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#include "gpu-compute/simple_pool_manager.hh"
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#include "base/misc.hh"
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// return the min number of elements that the manager can reserve given
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// a request for "size" elements
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uint32_t
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SimplePoolManager::minAllocatedElements(uint32_t size)
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{
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fatal_if(size <= 0 || size > poolSize(), "Illegal VGPR region size=%d\n",
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size);
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return size % minAllocation() > 0 ?
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(minAllocation() - (size % minAllocation())) + size : size;
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}
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std::string
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SimplePoolManager::printRegion()
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{
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std::string _cout;
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if (_reservedGroups == 0)
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_cout = "VRF is empty\n";
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else if (_reservedGroups > 0) {
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uint32_t reservedEntries = _reservedGroups * _regionSize;
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_cout = "VRF reserves " + std::to_string(reservedEntries) + " VGPRs\n";
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}
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return _cout;
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}
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bool
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SimplePoolManager::canAllocate(uint32_t numRegions, uint32_t size)
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{
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assert(numRegions * minAllocatedElements(size) <= poolSize());
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return _reservedGroups == 0;
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}
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void
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SimplePoolManager::freeRegion(uint32_t firstIdx, uint32_t lastIdx)
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{
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assert(_reservedGroups > 0);
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--_reservedGroups;
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if (!_reservedGroups)
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_nxtFreeIdx = 0;
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}
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uint32_t
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SimplePoolManager::allocateRegion(const uint32_t size,
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uint32_t *reservedPoolSize)
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{
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uint32_t actualSize = minAllocatedElements(size);
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uint32_t startIdx = _nxtFreeIdx;
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_nxtFreeIdx += actualSize;
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_regionSize = actualSize;
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assert(_nxtFreeIdx < poolSize());
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*reservedPoolSize = actualSize;
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++_reservedGroups;
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return startIdx;
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}
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uint32_t
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SimplePoolManager::regionSize(std::pair<uint32_t, uint32_t> ®ion)
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{
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bool wrapAround = (region.first > region.second);
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if (!wrapAround) {
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return region.second - region.first + 1;
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} else {
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return region.second + poolSize() - region.first + 1;
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}
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}
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