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81 lines
2.4 KiB
C
81 lines
2.4 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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#ifndef __MEMORY_H__
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#define __MEMORY_H__
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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 "persistent_memory.h"
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#include "options.h"
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#include "utils/applog.h"
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char *persistent_memory;
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int persistent_memory_flags = 0;
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const char * persistent_memory_allocate() {
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const int size = TWO_MB_PAGE * (opt_n_threads + 1);
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persistent_memory_flags |= MEMORY_HUGEPAGES_AVAILABLE;
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persistent_memory = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, 0, 0);
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if (persistent_memory == MAP_FAILED) {
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persistent_memory = _mm_malloc(size, 4096);
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return persistent_memory;
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}
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persistent_memory_flags |= MEMORY_HUGEPAGES_ENABLED;
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if (madvise(persistent_memory, size, MADV_RANDOM | MADV_WILLNEED) != 0) {
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applog(LOG_ERR, "madvise failed");
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}
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if (mlock(persistent_memory, size) == 0) {
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persistent_memory_flags |= MEMORY_LOCK;
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}
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return persistent_memory;
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}
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void persistent_memory_free() {
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const int size = TWO_MB_PAGE * (opt_n_threads + 1);
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if (persistent_memory_flags & MEMORY_HUGEPAGES_ENABLED) {
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if (persistent_memory_flags & MEMORY_LOCK) {
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munlock(persistent_memory, size);
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}
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munmap(persistent_memory, size);
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}
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else {
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_mm_free(persistent_memory);
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}
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}
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#endif /* __MEMORY_H__ */
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