83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
/* XMRig
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* Copyright 2010 Jeff Garzik <jgarzik@pobox.com>
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* Copyright 2012-2014 pooler <pooler@litecoinpool.org>
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* Copyright 2014 Lucas Jones <https://github.com/lucasjones>
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* Copyright 2014-2016 Wolf9466 <https://github.com/OhGodAPet>
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* Copyright 2016 Jay D Dee <jayddee246@gmail.com>
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* Copyright 2016-2017 XMRig <support@xmrig.com>
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*
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <mm_malloc.h>
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#include <sys/mman.h>
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#include "crypto/CryptoNight.h"
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#include "Mem.h"
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#include "Options.h"
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#include "Console.h"
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bool Mem::allocate(int algo, int threads, bool doubleHash)
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{
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m_algo = algo;
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m_threads = threads;
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m_doubleHash = doubleHash;
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const int ratio = (doubleHash && algo != Options::ALGO_CRYPTONIGHT_LITE) ? 2 : 1;
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const size_t size = MEMORY * (threads * ratio + 1);
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m_flags |= HugepagesAvailable;
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m_memory = static_cast<uint8_t*>(mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, 0, 0));
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if (m_memory == MAP_FAILED) {
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m_memory = static_cast<uint8_t*>(_mm_malloc(size, 16));
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return true;
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}
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m_flags |= HugepagesEnabled;
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if (madvise(m_memory, size, MADV_RANDOM | MADV_WILLNEED) != 0) {
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LOG_ERR("madvise failed");
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}
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if (mlock(m_memory, size) == 0) {
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m_flags |= Lock;
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}
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return true;
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}
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void Mem::release()
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{
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const int size = MEMORY * (m_threads + 1);
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if (m_flags & HugepagesEnabled) {
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if (m_flags & Lock) {
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munlock(m_memory, size);
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}
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munmap(m_memory, size);
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}
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else {
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_mm_free(m_memory);
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}
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}
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