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Huge pages support on OS X.

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Admin 2017-05-27 10:34:42 +03:00 • committed by Admin
parent 8a70202a98
commit 7741c341c7
2 changed files with 38 additions and 3 deletions
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33
mac/memory_mac.c
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@ -24,6 +24,7 @@
#include <stdlib.h>
#include <mm_malloc.h>
#include <sys/mman.h>
#include <mach/vm_statistics.h>
#include "persistent_memory.h"
#include "options.h"
@ -36,12 +37,40 @@ int persistent_memory_flags = 0;
const char * persistent_memory_allocate() {
const int ratio = (opt_double_hash && opt_algo != ALGO_CRYPTONIGHT_LITE) ? 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_ANON, VM_FLAGS_SUPERPAGE_SIZE_2MB, 0);
if (persistent_memory == MAP_FAILED) {
persistent_memory = _mm_malloc(size, 16);
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;
}
persistent_memory = _mm_malloc(size, 16);
return persistent_memory;
}
void persistent_memory_free() {
_mm_free(persistent_memory);
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);
}
}