xmrig/unix/memory_unix.c
2017-05-01 03:49:05 +03:00

82 lines
2.4 KiB
C

/* XMRig
* Copyright 2010 Jeff Garzik <jgarzik@pobox.com>
* Copyright 2012-2014 pooler <pooler@litecoinpool.org>
* Copyright 2014 Lucas Jones <https://github.com/lucasjones>
* Copyright 2014-2016 Wolf9466 <https://github.com/OhGodAPet>
* Copyright 2016 Jay D Dee <jayddee246@gmail.com>
* Copyright 2016-2017 XMRig <support@xmrig.com>
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __MEMORY_H__
#define __MEMORY_H__
#include <stdlib.h>
#include <mm_malloc.h>
#include <sys/mman.h>
#include "persistent_memory.h"
#include "options.h"
#include "utils/applog.h"
char *persistent_memory;
int persistent_memory_flags = 0;
const char * persistent_memory_allocate() {
const int ratio = opt_double_hash ? 2 : 1;
const int size = MEMORY * (opt_n_threads * ratio + 1);
persistent_memory_flags |= MEMORY_HUGEPAGES_AVAILABLE;
persistent_memory = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, 0, 0);
if (persistent_memory == MAP_FAILED) {
persistent_memory = _mm_malloc(size, 4096);
return persistent_memory;
}
persistent_memory_flags |= MEMORY_HUGEPAGES_ENABLED;
if (madvise(persistent_memory, size, MADV_RANDOM | MADV_WILLNEED) != 0) {
applog(LOG_ERR, "madvise failed");
}
if (mlock(persistent_memory, size) == 0) {
persistent_memory_flags |= MEMORY_LOCK;
}
return persistent_memory;
}
void persistent_memory_free() {
const int size = MEMORY * (opt_n_threads + 1);
if (persistent_memory_flags & MEMORY_HUGEPAGES_ENABLED) {
if (persistent_memory_flags & MEMORY_LOCK) {
munlock(persistent_memory, size);
}
munmap(persistent_memory, size);
}
else {
_mm_free(persistent_memory);
}
}
#endif /* __MEMORY_H__ */