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Unmap the file in llama_free

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Slaren 2023-03-29 08:31:26 +02:00 committed by Justine Tunney
parent d68c5dc435
commit 276e5b7811
1 changed files with 31 additions and 10 deletions
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41
llama.cpp
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@ -149,6 +149,10 @@ struct llama_model {
// the model memory buffer
std::vector<uint8_t> buf;
// model memory mapped file
void * mm_addr;
size_t mm_length;
// tensors
int n_loaded;
std::unordered_map<std::string, struct ggml_tensor *> tensors;
@ -296,22 +300,32 @@ struct llama_context_params llama_context_default_params() {
// model loading
//
static void * mmap_file(const char* fname) {
static void mmap_file(const char* fname, void * &mm_addr, size_t &mm_length) {
#if defined(MAP_FAILED)
// POSIX mmap
// POSIX
int fd = open(fname, O_RDONLY);
size_t len = lseek(fd, 0, SEEK_END);
void * mm_addr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0);
mm_length = lseek(fd, 0, SEEK_END);
mm_addr = mmap(NULL, mm_length, PROT_READ, MAP_SHARED, fd, 0);
close(fd);
if (mm_addr == MAP_FAILED) {
perror("mmap failed");
mm_addr = NULL;
mm_length = 0;
}
close(fd);
return mm_addr;
#else
// TODO: windows support
(void)(fname); // suppress warnings
return NULL;
#endif
}
static void munmap_file(void * addr, size_t length) {
#if defined(MAP_FAILED)
// POSIX
munmap(addr, length);
#else
// TODO: windows support
(void)(addr); // suppress warnings
(void)(length);
#endif
}
@ -480,12 +494,15 @@ static bool llama_model_load(
bool use_mmap = (n_parts == 1);
// try to memory map the model file
void* mm_addr = NULL;
void * mm_addr = NULL;
if (use_mmap) {
mm_addr = mmap_file(fname.c_str());
if (mm_addr == NULL) {
mmap_file(fname.c_str(), model.mm_addr, model.mm_length);
if (model.mm_addr == NULL) {
use_mmap = false;
}
else {
mm_addr = model.mm_addr;
}
}
auto & ctx = model.ctx;
@ -1750,6 +1767,10 @@ void llama_free(struct llama_context * ctx) {
ggml_free(ctx->model.ctx);
}
if (ctx->model.mm_addr) {
munmap_file(ctx->model.mm_addr, ctx->model.mm_length);
}
delete ctx;
}