simple_pool_manager.cc revision 11308
14661Sksewell@umich.edu/*
24661Sksewell@umich.edu * Copyright (c) 2015 Advanced Micro Devices, Inc.
34661Sksewell@umich.edu * All rights reserved.
44661Sksewell@umich.edu *
54661Sksewell@umich.edu * For use for simulation and test purposes only
64661Sksewell@umich.edu *
74661Sksewell@umich.edu * Redistribution and use in source and binary forms, with or without
84661Sksewell@umich.edu * modification, are permitted provided that the following conditions are met:
94661Sksewell@umich.edu *
104661Sksewell@umich.edu * 1. Redistributions of source code must retain the above copyright notice,
114661Sksewell@umich.edu * this list of conditions and the following disclaimer.
124661Sksewell@umich.edu *
134661Sksewell@umich.edu * 2. Redistributions in binary form must reproduce the above copyright notice,
144661Sksewell@umich.edu * this list of conditions and the following disclaimer in the documentation
154661Sksewell@umich.edu * and/or other materials provided with the distribution.
164661Sksewell@umich.edu *
174661Sksewell@umich.edu * 3. Neither the name of the copyright holder nor the names of its contributors
184661Sksewell@umich.edu * may be used to endorse or promote products derived from this software
194661Sksewell@umich.edu * without specific prior written permission.
204661Sksewell@umich.edu *
214661Sksewell@umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
224661Sksewell@umich.edu * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
234661Sksewell@umich.edu * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
244661Sksewell@umich.edu * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
254661Sksewell@umich.edu * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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274661Sksewell@umich.edu * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
284661Sksewell@umich.edu * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
294661Sksewell@umich.edu * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
304661Sksewell@umich.edu * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
314661Sksewell@umich.edu * POSSIBILITY OF SUCH DAMAGE.
324661Sksewell@umich.edu *
334661Sksewell@umich.edu * Author: John Kalamatianos
344661Sksewell@umich.edu */
354661Sksewell@umich.edu
364661Sksewell@umich.edu#include "gpu-compute/simple_pool_manager.hh"
374661Sksewell@umich.edu
384661Sksewell@umich.edu#include "base/misc.hh"
394661Sksewell@umich.edu
404661Sksewell@umich.edu// return the min number of elements that the manager can reserve given
414661Sksewell@umich.edu// a request for "size" elements
424661Sksewell@umich.eduuint32_t
434661Sksewell@umich.eduSimplePoolManager::minAllocatedElements(uint32_t size)
444661Sksewell@umich.edu{
454661Sksewell@umich.edu    fatal_if(size <= 0 || size > poolSize(), "Illegal VGPR region size=%d\n",
464661Sksewell@umich.edu             size);
474661Sksewell@umich.edu
484661Sksewell@umich.edu    return size % minAllocation() > 0 ?
494661Sksewell@umich.edu        (minAllocation() - (size % minAllocation())) + size : size;
504661Sksewell@umich.edu}
514661Sksewell@umich.edu
524661Sksewell@umich.edustd::string
534661Sksewell@umich.eduSimplePoolManager::printRegion()
544661Sksewell@umich.edu{
554661Sksewell@umich.edu    std::string _cout;
564661Sksewell@umich.edu    if (_reservedGroups == 0)
574661Sksewell@umich.edu        _cout = "VRF is empty\n";
584661Sksewell@umich.edu    else if (_reservedGroups > 0) {
594661Sksewell@umich.edu        uint32_t reservedEntries = _reservedGroups * _regionSize;
604661Sksewell@umich.edu        _cout = "VRF reserves " + std::to_string(reservedEntries) + " VGPRs\n";
614661Sksewell@umich.edu    }
624661Sksewell@umich.edu
634661Sksewell@umich.edu    return _cout;
644661Sksewell@umich.edu}
654661Sksewell@umich.edu
664661Sksewell@umich.edubool
674661Sksewell@umich.eduSimplePoolManager::canAllocate(uint32_t numRegions, uint32_t size)
684661Sksewell@umich.edu{
694661Sksewell@umich.edu    assert(numRegions * minAllocatedElements(size) <= poolSize());
704661Sksewell@umich.edu
714661Sksewell@umich.edu    return _reservedGroups == 0;
724661Sksewell@umich.edu}
734661Sksewell@umich.edu
744661Sksewell@umich.eduvoid
754661Sksewell@umich.eduSimplePoolManager::freeRegion(uint32_t firstIdx, uint32_t lastIdx)
764661Sksewell@umich.edu{
774661Sksewell@umich.edu    assert(_reservedGroups > 0);
784661Sksewell@umich.edu    --_reservedGroups;
794661Sksewell@umich.edu
804661Sksewell@umich.edu    if (!_reservedGroups)
814661Sksewell@umich.edu        _nxtFreeIdx = 0;
824661Sksewell@umich.edu}
834661Sksewell@umich.edu
844661Sksewell@umich.eduuint32_t
854661Sksewell@umich.eduSimplePoolManager::allocateRegion(const uint32_t size,
864661Sksewell@umich.edu                                  uint32_t *reservedPoolSize)
874661Sksewell@umich.edu{
884661Sksewell@umich.edu    uint32_t actualSize = minAllocatedElements(size);
894661Sksewell@umich.edu    uint32_t startIdx = _nxtFreeIdx;
904661Sksewell@umich.edu    _nxtFreeIdx += actualSize;
914661Sksewell@umich.edu    _regionSize = actualSize;
924661Sksewell@umich.edu    assert(_nxtFreeIdx < poolSize());
934661Sksewell@umich.edu    *reservedPoolSize = actualSize;
944661Sksewell@umich.edu    ++_reservedGroups;
954661Sksewell@umich.edu
964661Sksewell@umich.edu    return startIdx;
974661Sksewell@umich.edu}
984661Sksewell@umich.edu
994661Sksewell@umich.eduuint32_t
1004661Sksewell@umich.eduSimplePoolManager::regionSize(std::pair<uint32_t, uint32_t> &region)
1014661Sksewell@umich.edu{
1024661Sksewell@umich.edu    bool wrapAround = (region.first > region.second);
1034661Sksewell@umich.edu    if (!wrapAround) {
1044661Sksewell@umich.edu        return region.second - region.first + 1;
1054661Sksewell@umich.edu    } else {
1064661Sksewell@umich.edu        return region.second + poolSize() - region.first + 1;
1074661Sksewell@umich.edu    }
1084661Sksewell@umich.edu}
1094661Sksewell@umich.edu