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GGUF: Load and save metadata (#446)

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* gguf metadata
---------

Co-authored-by: Awni Hannun <awni@apple.com>
This commit is contained in:
Juarez Bochi 2024-01-19 23:06:05 +01:00 committed by GitHub
parent 6589c869d6
commit ddf50113c5
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GPG Key ID: B5690EEEBB952194
11 changed files with 668 additions and 94 deletions
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55
mlx/io.h Normal file
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@ -0,0 +1,55 @@
// Copyright © 2023-2024 Apple Inc.
#pragma once
#include <variant>
#include "mlx/array.h"
#include "mlx/io/load.h"
#include "mlx/ops.h"
#include "mlx/stream.h"
namespace mlx::core {
/** Save array to out stream in .npy format */
void save(std::shared_ptr<io::Writer> out_stream, array a);
/** Save array to file in .npy format */
void save(const std::string& file, array a);
/** Load array from reader in .npy format */
array load(std::shared_ptr<io::Reader> in_stream, StreamOrDevice s = {});
/** Load array from file in .npy format */
array load(const std::string& file, StreamOrDevice s = {});
/** Load array map from .safetensors file format */
std::unordered_map<std::string, array> load_safetensors(
std::shared_ptr<io::Reader> in_stream,
StreamOrDevice s = {});
std::unordered_map<std::string, array> load_safetensors(
const std::string& file,
StreamOrDevice s = {});
void save_safetensors(
std::shared_ptr<io::Writer> in_stream,
std::unordered_map<std::string, array>);
void save_safetensors(
const std::string& file,
std::unordered_map<std::string, array>);
using MetaData =
std::variant<std::monostate, array, std::string, std::vector<std::string>>;
/** Load array map and metadata from .gguf file format */
std::pair<
std::unordered_map<std::string, array>,
std::unordered_map<std::string, MetaData>>
load_gguf(const std::string& file, StreamOrDevice s = {});
void save_gguf(
std::string file,
std::unordered_map<std::string, array> array_map,
std::unordered_map<std::string, MetaData> meta_data = {});
} // namespace mlx::core

309
mlx/io/gguf.cpp
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@ -1,9 +1,12 @@
// Copyright © 2023 Apple Inc.
#include <cstdint>
#include <cstring>
#include <numeric>
#include "mlx/ops.h"
#include "mlx/io.h"
#include "mlx/primitives.h"
#include "mlx/transforms.h"
#include "mlx/utils.h"
extern "C" {
@ -12,6 +15,9 @@ extern "C" {
namespace mlx::core {
// https://github.com/antirez/gguf-tools/blob/af7d88d808a7608a33723fba067036202910acb3/gguflib.h#L102-L108
constexpr int gguf_array_header_size = 12;
std::optional<uint32_t> dtype_to_gguf_tensor_type(const Dtype& dtype) {
switch (dtype) {
case float32:
@ -46,7 +52,7 @@ std::optional<Dtype> gguf_type_to_dtype(const uint32_t& gguf_type) {
}
}
std::tuple<allocator::Buffer, Dtype> extract_tensor_data(gguf_tensor* tensor) {
std::pair<allocator::Buffer, Dtype> extract_tensor_data(gguf_tensor* tensor) {
std::optional<Dtype> equivalent_dtype = gguf_type_to_dtype(tensor->type);
// If there's an equivalent type, we can simply copy.
if (equivalent_dtype.has_value()) {
@ -70,15 +76,132 @@ std::tuple<allocator::Buffer, Dtype> extract_tensor_data(gguf_tensor* tensor) {
return {buffer, float16};
}
std::unordered_map<std::string, array> load_gguf(
const std::string& file,
StreamOrDevice s) {
std::unordered_map<std::string, array> result;
gguf_ctx* ctx = gguf_open(file.c_str());
if (!ctx) {
throw std::runtime_error("[load_gguf] gguf_init failed");
void set_mx_value_from_gguf(
gguf_ctx* ctx,
uint32_t type,
gguf_value* val,
MetaData& value) {
switch (type) {
case GGUF_VALUE_TYPE_UINT8:
value = array(val->uint8, uint8);
break;
case GGUF_VALUE_TYPE_INT8:
value = array(val->int8, int8);
break;
case GGUF_VALUE_TYPE_UINT16:
value = array(val->uint16, uint16);
break;
case GGUF_VALUE_TYPE_INT16:
value = array(val->int16, int16);
break;
case GGUF_VALUE_TYPE_UINT32:
value = array(val->uint32, uint32);
break;
case GGUF_VALUE_TYPE_INT32:
value = array(val->int32, int32);
break;
case GGUF_VALUE_TYPE_UINT64:
value = array(val->uint64, uint64);
break;
case GGUF_VALUE_TYPE_INT64:
value = array(val->int64, int64);
break;
case GGUF_VALUE_TYPE_FLOAT32:
value = array(val->float32, float32);
break;
case GGUF_VALUE_TYPE_BOOL:
value = array(val->boolval, bool_);
break;
case GGUF_VALUE_TYPE_STRING:
value =
std::string(val->string.string, static_cast<int>(val->string.len));
break;
case GGUF_VALUE_TYPE_FLOAT64:
value = array(val->float64, float32);
break;
case GGUF_VALUE_TYPE_ARRAY: {
ctx->off += gguf_array_header_size; // Skip header
char* data = reinterpret_cast<char*>(val) + gguf_array_header_size;
auto size = static_cast<int>(val->array.len);
if (val->array.type == GGUF_VALUE_TYPE_ARRAY) {
throw std::invalid_argument(
"[load_gguf] Only supports loading 1-layer of nested arrays.");
}
gguf_skip_key_values_section(ctx);
switch (val->array.type) {
case GGUF_VALUE_TYPE_UINT8:
value = array(reinterpret_cast<uint8_t*>(data), {size}, uint8);
break;
case GGUF_VALUE_TYPE_INT8:
value = array(reinterpret_cast<int8_t*>(data), {size}, int8);
break;
case GGUF_VALUE_TYPE_UINT16:
value = array(reinterpret_cast<uint16_t*>(data), {size}, uint16);
break;
case GGUF_VALUE_TYPE_INT16:
value = array(reinterpret_cast<int16_t*>(data), {size}, int16);
break;
case GGUF_VALUE_TYPE_UINT32:
value = array(reinterpret_cast<uint32_t*>(data), {size}, uint32);
break;
case GGUF_VALUE_TYPE_INT32:
value = array(reinterpret_cast<int32_t*>(data), {size}, int32);
break;
case GGUF_VALUE_TYPE_UINT64:
value = array(reinterpret_cast<uint64_t*>(data), {size}, uint64);
break;
case GGUF_VALUE_TYPE_INT64:
value = array(reinterpret_cast<uint64_t*>(data), {size}, int64);
break;
case GGUF_VALUE_TYPE_FLOAT32:
value = array(reinterpret_cast<float*>(data), {size}, float32);
break;
case GGUF_VALUE_TYPE_BOOL:
value = array(reinterpret_cast<bool*>(data), {size}, bool_);
break;
case GGUF_VALUE_TYPE_STRING: {
std::vector<std::string> strs(size);
for (auto& str : strs) {
auto str_val = reinterpret_cast<gguf_string*>(data);
data += (str_val->len + sizeof(gguf_string));
str = std::string(str_val->string, static_cast<int>(str_val->len));
ctx->off += (str_val->len + sizeof(gguf_string));
}
value = std::move(strs);
break;
}
case GGUF_VALUE_TYPE_FLOAT64:
value = array(reinterpret_cast<double*>(data), {size}, float32);
break;
default:
throw std::runtime_error(
"[load_gguf] Multiple levels of nested arrays are not supported.");
}
break;
}
default:
throw std::runtime_error("[load_gguf] Received unexpected type.");
break;
}
if (type == GGUF_VALUE_TYPE_STRING) {
ctx->off += (sizeof(gguf_string) + std::get<std::string>(value).size());
} else if (auto pv = std::get_if<array>(&value); pv) {
ctx->off += pv->nbytes();
}
}
std::unordered_map<std::string, MetaData> load_metadata(gguf_ctx* ctx) {
std::unordered_map<std::string, MetaData> metadata;
gguf_key key;
while (gguf_get_key(ctx, &key)) {
std::string key_name = std::string(key.name, key.namelen);
auto& val = metadata.insert({key_name, MetaData{}}).first->second;
set_mx_value_from_gguf(ctx, key.type, key.val, val);
}
return metadata;
}
std::unordered_map<std::string, array> load_arrays(gguf_ctx* ctx) {
std::unordered_map<std::string, array> array_map;
gguf_tensor tensor;
while (gguf_get_tensor(ctx, &tensor)) {
std::vector<int> shape;
@ -89,27 +212,181 @@ std::unordered_map<std::string, array> load_gguf(
const auto& [data, dtype] = extract_tensor_data(&tensor);
array loaded_array = array(data, shape, dtype);
std::string name = std::string(tensor.name, tensor.namelen);
result.insert({name, loaded_array});
array_map.insert({name, loaded_array});
}
gguf_close(ctx);
return result;
return array_map;
}
void save_gguf(std::string file, std::unordered_map<std::string, array> a) {
std::pair<
std::unordered_map<std::string, array>,
std::unordered_map<std::string, MetaData>>
load_gguf(const std::string& file, StreamOrDevice s) {
gguf_ctx* ctx = gguf_open(file.c_str());
if (!ctx) {
throw std::runtime_error("[load_gguf] gguf_init failed");
}
auto metadata = load_metadata(ctx);
auto arrays = load_arrays(ctx);
gguf_close(ctx);
return {arrays, metadata};
}
void append_kv_array(
gguf_ctx* ctx,
const std::string& key,
array& val,
uint32_t gguf_type) {
if (val.ndim() == 1) {
size_t gguf_size = val.nbytes() + gguf_array_header_size;
std::vector<char> val_vec(gguf_size);
gguf_value* gguf_val = reinterpret_cast<gguf_value*>(val_vec.data());
gguf_val->array.type = gguf_type;
gguf_val->array.len = val.size();
memcpy(
val_vec.data() + gguf_array_header_size,
val.data<char>(),
val.nbytes());
gguf_append_kv(
ctx,
key.c_str(),
key.length(),
GGUF_VALUE_TYPE_ARRAY,
reinterpret_cast<void*>(val_vec.data()),
gguf_size);
} else {
gguf_append_kv(
ctx,
key.c_str(),
key.length(),
gguf_type,
reinterpret_cast<void*>(val.data<char>()),
val.nbytes());
}
}
void save_gguf(
std::string file,
std::unordered_map<std::string, array> array_map,
std::unordered_map<std::string, MetaData> metadata /* = {} */) {
// Add .gguf to file name if it is not there
if (file.length() < 5 || file.substr(file.length() - 5, 5) != ".gguf") {
file += ".gguf";
}
gguf_ctx* ctx = gguf_create(file.c_str(), GGUF_OVERWRITE);
if (!ctx) {
throw std::runtime_error("[save_gguf] gguf_create failed");
}
auto string_to_gguf = [](char* dst, const std::string& src) {
gguf_string* val = reinterpret_cast<gguf_string*>(dst);
val->len = src.length();
memcpy(val->string, src.c_str(), src.length());
};
// Save any meta data
for (auto& [key, value] : metadata) {
if (auto pv = std::get_if<std::string>(&value); pv) {
const std::string& str = *pv;
size_t size = sizeof(gguf_string) + str.length();
std::vector<char> val_vec(size);
string_to_gguf(val_vec.data(), str);
gguf_append_kv(
ctx,
key.c_str(),
key.length(),
GGUF_VALUE_TYPE_STRING,
static_cast<void*>(val_vec.data()),
size);
} else if (auto pv = std::get_if<std::vector<std::string>>(&value); pv) {
const auto& str_vec = *pv;
auto mem_size = std::accumulate(
str_vec.begin(), str_vec.end(), 0, [](size_t accum, const auto& s) {
return accum + s.size();
});
mem_size += str_vec.size() * sizeof(gguf_string) + gguf_array_header_size;
std::vector<char> val_vec(mem_size);
gguf_value* val = reinterpret_cast<gguf_value*>(val_vec.data());
val->array.type = GGUF_VALUE_TYPE_STRING;
val->array.len = str_vec.size();
auto str_ptr = val_vec.data() + gguf_array_header_size;
for (auto& str : str_vec) {
string_to_gguf(str_ptr, str);
str_ptr += str.length() + sizeof(gguf_string);
}
gguf_append_kv(
ctx,
key.c_str(),
key.length(),
GGUF_VALUE_TYPE_ARRAY,
static_cast<void*>(val),
mem_size);
} else if (auto pv = std::get_if<array>(&value); pv) {
array v = *pv;
if (v.ndim() > 1) {
throw std::runtime_error(
"[save_gguf] Cannot save arrays with more than one dimension.");
}
if (v.size() == 0) {
throw std::runtime_error("[save_gguf] Cannot save empty arrays.");
}
eval(v);
if (!v.flags().row_contiguous) {
v = reshape(flatten(v), v.shape());
}
if (!v.flags().row_contiguous) {
throw std::runtime_error(
"[save_gguf] Cannot save non contiguous arrays.");
}
switch (v.dtype()) {
case float32:
append_kv_array(ctx, key, v, GGUF_VALUE_TYPE_FLOAT32);
break;
case int64:
append_kv_array(ctx, key, v, GGUF_VALUE_TYPE_INT64);
break;
case int32:
append_kv_array(ctx, key, v, GGUF_VALUE_TYPE_INT32);
break;
case int16:
append_kv_array(ctx, key, v, GGUF_VALUE_TYPE_INT16);
break;
case int8:
append_kv_array(ctx, key, v, GGUF_VALUE_TYPE_INT8);
break;
case uint64:
append_kv_array(ctx, key, v, GGUF_VALUE_TYPE_UINT64);
break;
case uint32:
append_kv_array(ctx, key, v, GGUF_VALUE_TYPE_UINT32);
break;
case uint16:
append_kv_array(ctx, key, v, GGUF_VALUE_TYPE_UINT16);
break;
case uint8:
append_kv_array(ctx, key, v, GGUF_VALUE_TYPE_UINT8);
break;
case bool_:
append_kv_array(ctx, key, v, GGUF_VALUE_TYPE_BOOL);
break;
default:
std::ostringstream msg;
msg << "[save_gguf] array type " << v.dtype()
<< " not support for metadata.";
throw std::invalid_argument(msg.str());
}
} else {
throw std::runtime_error(
"[save_gguf] Received unexpected type in metadata");
}
}
// Tensor offsets are relative to data section, so we start at offset 0.
uint64_t tensor_offset = 0;
// First, append the tensor info
for (auto& [key, arr] : a) {
for (auto& [key, arr] : array_map) {
arr.eval();
// Try to make it row contiguous
@ -154,7 +431,7 @@ void save_gguf(std::string file, std::unordered_map<std::string, array> a) {
}
// Then, append the tensor weights
for (const auto& [key, arr] : a) {
for (const auto& [key, arr] : array_map) {
if (!gguf_append_tensor_data(ctx, (void*)arr.data<void>(), arr.nbytes())) {
throw std::runtime_error("[save_gguf] gguf_append_tensor_data failed");
}

2
mlx/io/safetensor.cpp
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@ -3,8 +3,8 @@
#include <json.hpp>
#include <stack>
#include "mlx/io.h"
#include "mlx/io/load.h"
#include "mlx/ops.h"
#include "mlx/primitives.h"
using json = nlohmann::json;

1
mlx/mlx.h
View File

@ -6,6 +6,7 @@
#include "mlx/backend/metal/metal.h"
#include "mlx/device.h"
#include "mlx/fft.h"
#include "mlx/io.h"
#include "mlx/linalg.h"
#include "mlx/ops.h"
#include "mlx/random.h"

46
mlx/ops.h
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@ -1,14 +1,13 @@
// Copyright © 2023 Apple Inc.
// Copyright © 2023-2024 Apple Inc.
#pragma once
#include <optional>
#include <variant>
#include "array.h"
#include "device.h"
#include "io/load.h"
#include "stream.h"
#include "mlx/array.h"
#include "mlx/device.h"
#include "mlx/stream.h"
namespace mlx::core {
@ -1040,20 +1039,6 @@ array conv2d(
int groups = 1,
StreamOrDevice s = {});
/** Serialization operations */
/** Save array to out stream in .npy format */
void save(std::shared_ptr<io::Writer> out_stream, array a);
/** Save array to file in .npy format */
void save(const std::string& file, array a);
/** Load array from reader in .npy format */
array load(std::shared_ptr<io::Reader> in_stream, StreamOrDevice s = {});
/** Load array from file in .npy format */
array load(const std::string& file, StreamOrDevice s = {});
/** Quantized matmul multiplies x with a quantized matrix w*/
array quantized_matmul(
const array& x,
@ -1100,28 +1085,6 @@ array outer(const array& a, const array& b, StreamOrDevice s = {});
/** Compute the inner product of two vectors. */
array inner(const array& a, const array& b, StreamOrDevice s = {});
/** Load array map from .safetensors file format */
std::unordered_map<std::string, array> load_safetensors(
std::shared_ptr<io::Reader> in_stream,
StreamOrDevice s = {});
std::unordered_map<std::string, array> load_safetensors(
const std::string& file,
StreamOrDevice s = {});
void save_safetensors(
std::shared_ptr<io::Writer> in_stream,
std::unordered_map<std::string, array>);
void save_safetensors(
const std::string& file,
std::unordered_map<std::string, array>);
/** Load array map from .gguf file format */
std::unordered_map<std::string, array> load_gguf(
const std::string& file,
StreamOrDevice s = {});
void save_gguf(std::string file, std::unordered_map<std::string, array> a);
/** Compute D = beta * C + alpha * (A @ B) */
array addmm(
array c,
@ -1130,4 +1093,5 @@ array addmm(
const float& alpha = 1.f,
const float& beta = 1.f,
StreamOrDevice s = {});
} // namespace mlx::core

34
python/src/load.cpp
View File

@ -181,9 +181,10 @@ std::unordered_map<std::string, array> mlx_load_safetensor_helper(
"[load_safetensors] Input must be a file-like object, or string");
}
std::unordered_map<std::string, array> mlx_load_gguf_helper(
py::object file,
StreamOrDevice s) {
std::pair<
std::unordered_map<std::string, array>,
std::unordered_map<std::string, MetaData>>
mlx_load_gguf_helper(py::object file, StreamOrDevice s) {
if (py::isinstance<py::str>(file)) { // Assume .gguf file path string
return load_gguf(py::cast<std::string>(file), s);
}
@ -246,9 +247,10 @@ array mlx_load_npy_helper(py::object file, StreamOrDevice s) {
"[load_npy] Input must be a file-like object, or string");
}
DictOrArray mlx_load_helper(
LoadOutputTypes mlx_load_helper(
py::object file,
std::optional<std::string> format,
bool return_metadata,
StreamOrDevice s) {
if (!format.has_value()) {
std::string fname;
@ -268,6 +270,10 @@ DictOrArray mlx_load_helper(
format.emplace(fname.substr(ext + 1));
}
if (return_metadata && format.value() != "gguf") {
throw std::invalid_argument(
"[load] metadata not supported for format " + format.value());
}
if (format.value() == "safetensors") {
return mlx_load_safetensor_helper(file, s);
} else if (format.value() == "npz") {
@ -275,7 +281,12 @@ DictOrArray mlx_load_helper(
} else if (format.value() == "npy") {
return mlx_load_npy_helper(file, s);
} else if (format.value() == "gguf") {
return mlx_load_gguf_helper(file, s);
auto [weights, metadata] = mlx_load_gguf_helper(file, s);
if (return_metadata) {
return std::make_pair(weights, metadata);
} else {
return weights;
}
} else {
throw std::invalid_argument("[load] Unknown file format " + format.value());
}
@ -448,10 +459,19 @@ void mlx_save_safetensor_helper(py::object file, py::dict d) {
"[save_safetensors] Input must be a file-like object, or string");
}
void mlx_save_gguf_helper(py::object file, py::dict d) {
auto arrays_map = d.cast<std::unordered_map<std::string, array>>();
void mlx_save_gguf_helper(
py::object file,
py::dict a,
std::optional<py::dict> m) {
auto arrays_map = a.cast<std::unordered_map<std::string, array>>();
if (py::isinstance<py::str>(file)) {
if (m) {
auto metadata_map =
m.value().cast<std::unordered_map<std::string, MetaData>>();
save_gguf(py::cast<std::string>(file), arrays_map, metadata_map);
} else {
save_gguf(py::cast<std::string>(file), arrays_map);
}
return;
}

22
python/src/load.h
View File

@ -7,26 +7,36 @@
#include <string>
#include <unordered_map>
#include <variant>
#include "mlx/ops.h"
#include "mlx/io.h"
namespace py = pybind11;
using namespace mlx::core;
using DictOrArray = std::variant<array, std::unordered_map<std::string, array>>;
using LoadOutputTypes = std::variant<
array,
std::unordered_map<std::string, array>,
std::pair<
std::unordered_map<std::string, array>,
std::unordered_map<std::string, MetaData>>>;
std::unordered_map<std::string, array> mlx_load_safetensor_helper(
py::object file,
StreamOrDevice s);
void mlx_save_safetensor_helper(py::object file, py::dict d);
std::unordered_map<std::string, array> mlx_load_gguf_helper(
std::pair<
std::unordered_map<std::string, array>,
std::unordered_map<std::string, MetaData>>
mlx_load_gguf_helper(py::object file, StreamOrDevice s);
void mlx_save_gguf_helper(
py::object file,
StreamOrDevice s);
void mlx_save_gguf_helper(py::object file, py::dict d);
py::dict d,
std::optional<py::dict> m);
DictOrArray mlx_load_helper(
LoadOutputTypes mlx_load_helper(
py::object file,
std::optional<std::string> format,
bool return_metadata,
StreamOrDevice s);
void mlx_save_helper(py::object file, array a);
void mlx_savez_helper(

14
python/src/ops.cpp
View File

@ -3117,10 +3117,11 @@ void init_ops(py::module_& m) {
"file"_a,
py::pos_only(),
"format"_a = none,
"return_metadata"_a = false,
py::kw_only(),
"stream"_a = none,
R"pbdoc(
load(file: str, /, format: Optional[str] = None, *, stream: Union[None, Stream, Device] = None) -> Union[array, Dict[str, array]]
load(file: str, /, format: Optional[str] = None, return_metadata: bool = False, *, stream: Union[None, Stream, Device] = None) -> Union[array, Dict[str, array]]
Load array(s) from a binary file.
@ -3131,10 +3132,15 @@ void init_ops(py::module_& m) {
format (str, optional): Format of the file. If ``None``, the format
is inferred from the file extension. Supported formats: ``npy``,
``npz``, and ``safetensors``. Default: ``None``.
return_metadata (bool, optional): Load the metadata for formats which
support matadata. The metadata will be returned as an additional
dictionary.
Returns:
result (array, dict):
A single array if loading from a ``.npy`` file or a dict mapping
names to arrays if loading from a ``.npz`` or ``.safetensors`` file.
If ``return_metadata` is ``True`` an additional dictionary of metadata
will be returned.
Warning:
@ -3164,8 +3170,9 @@ void init_ops(py::module_& m) {
&mlx_save_gguf_helper,
"file"_a,
"arrays"_a,
"metadata"_a = none,
R"pbdoc(
save_gguf(file: str, arrays: Dict[str, array])
save_gguf(file: str, arrays: Dict[str, array], metadata: Dict[str, Union[array, str, List[str]]])
Save array(s) to a binary file in ``.gguf`` format.
@ -3175,6 +3182,9 @@ void init_ops(py::module_& m) {
Args:
file (file, str): File in which the array is saved.
arrays (dict(str, array)): The dictionary of names to arrays to be saved.
metadata (dict(str, Union[array, str, list(str)])): The dictionary of
metadata to be saved. The values can be a scalar or 1D obj:`array`,
a :obj:`str`, or a :obj:`list` of :obj:`str`.
)pbdoc");
m.def(
"where",

4
python/tests/test_blas.py
View File

@ -576,8 +576,8 @@ class TestBlas(mlx_tests.MLXTestCase):
],
)
self.assertTrue(mx.allclose(out_ref[0], out_test[0], atol=1e-5).item())
self.assertTrue(mx.allclose(out_ref[0], out_test[0], atol=1e-4).item())
for r, t in zip(dout_ref, dout_test):
self.assertListEqual(r.shape, t.shape)
self.assertTrue(mx.allclose(r, t, atol=1e-5).item())
self.assertTrue(mx.allclose(r, t, atol=1e-4).item())

109
python/tests/test_load.py
View File

@ -117,6 +117,115 @@ class TestLoad(mlx_tests.MLXTestCase):
mx.array_equal(load_dict["test"], save_dict["test"])
)
def test_save_and_load_gguf_metadata_basic(self):
if not os.path.isdir(self.test_dir):
os.mkdir(self.test_dir)
save_file_mlx = os.path.join(self.test_dir, f"mlx_gguf_with_metadata.gguf")
save_dict = {"test": mx.ones((4, 4), dtype=mx.int32)}
metadata = {}
# Empty works
mx.save_gguf(save_file_mlx, save_dict, metadata)
# Loads without the metadata
load_dict = mx.load(save_file_mlx)
self.assertTrue("test" in load_dict)
self.assertTrue(mx.array_equal(load_dict["test"], save_dict["test"]))
# Loads empty metadata
load_dict, meta_load_dict = mx.load(save_file_mlx, return_metadata=True)
self.assertTrue("test" in load_dict)
self.assertTrue(mx.array_equal(load_dict["test"], save_dict["test"]))
self.assertEqual(len(meta_load_dict), 0)
# Loads string metadata
metadata = {"meta": "data"}
mx.save_gguf(save_file_mlx, save_dict, metadata)
load_dict, meta_load_dict = mx.load(save_file_mlx, return_metadata=True)
self.assertTrue("test" in load_dict)
self.assertTrue(mx.array_equal(load_dict["test"], save_dict["test"]))
self.assertEqual(len(meta_load_dict), 1)
self.assertTrue("meta" in meta_load_dict)
self.assertEqual(meta_load_dict["meta"], "data")
def test_save_and_load_gguf_metadata_arrays(self):
if not os.path.isdir(self.test_dir):
os.mkdir(self.test_dir)
save_file_mlx = os.path.join(self.test_dir, f"mlx_gguf_with_metadata.gguf")
save_dict = {"test": mx.ones((4, 4), dtype=mx.int32)}
# Test scalars and one dimensional arrays
for t in [
mx.uint8,
mx.int8,
mx.uint16,
mx.int16,
mx.uint32,
mx.int32,
mx.uint64,
mx.int64,
mx.float32,
]:
for shape in [(), (2,)]:
arr = mx.random.uniform(shape=shape).astype(t)
metadata = {"meta": arr}
mx.save_gguf(save_file_mlx, save_dict, metadata)
_, meta_load_dict = mx.load(save_file_mlx, return_metadata=True)
self.assertEqual(len(meta_load_dict), 1)
self.assertTrue("meta" in meta_load_dict)
self.assertTrue(mx.array_equal(meta_load_dict["meta"], arr))
self.assertEqual(meta_load_dict["meta"].dtype, arr.dtype)
for t in [mx.float16, mx.bfloat16, mx.complex64]:
with self.assertRaises(ValueError):
arr = mx.array(1, t)
metadata = {"meta": arr}
mx.save_gguf(save_file_mlx, save_dict, metadata)
def test_save_and_load_gguf_metadata_mixed(self):
if not os.path.isdir(self.test_dir):
os.mkdir(self.test_dir)
save_file_mlx = os.path.join(self.test_dir, f"mlx_gguf_with_metadata.gguf")
save_dict = {"test": mx.ones((4, 4), dtype=mx.int32)}
# Test string and array
arr = mx.array(1.5)
metadata = {"meta1": arr, "meta2": "data"}
mx.save_gguf(save_file_mlx, save_dict, metadata)
_, meta_load_dict = mx.load(save_file_mlx, return_metadata=True)
self.assertEqual(len(meta_load_dict), 2)
self.assertTrue("meta1" in meta_load_dict)
self.assertTrue(mx.array_equal(meta_load_dict["meta1"], arr))
self.assertEqual(meta_load_dict["meta1"].dtype, arr.dtype)
self.assertTrue("meta2" in meta_load_dict)
self.assertEqual(meta_load_dict["meta2"], "data")
# Test list of strings
metadata = {"meta": ["data1", "data2", "data345"]}
mx.save_gguf(save_file_mlx, save_dict, metadata)
_, meta_load_dict = mx.load(save_file_mlx, return_metadata=True)
self.assertEqual(len(meta_load_dict), 1)
self.assertEqual(meta_load_dict["meta"], metadata["meta"])
# Test a combination of stuff
metadata = {
"meta1": ["data1", "data2", "data345"],
"meta2": mx.array([1, 2, 3, 4]),
"meta3": "data",
"meta4": mx.array(1.5),
}
mx.save_gguf(save_file_mlx, save_dict, metadata)
_, meta_load_dict = mx.load(save_file_mlx, return_metadata=True)
self.assertEqual(len(meta_load_dict), 4)
for k, v in metadata.items():
if isinstance(v, mx.array):
self.assertTrue(mx.array_equal(meta_load_dict[k], v))
else:
self.assertEqual(meta_load_dict[k], v)
def test_save_and_load_fs(self):
if not os.path.isdir(self.test_dir):
os.mkdir(self.test_dir)

154
tests/load_tests.cpp
View File

@ -37,33 +37,161 @@ TEST_CASE("test save_safetensors") {
TEST_CASE("test gguf") {
std::string file_path = get_temp_file("test_arr.gguf");
using dict = std::unordered_map<std::string, array>;
dict map = {
dict original_weights = {
{"test", array({1.0f, 2.0f, 3.0f, 4.0f})},
{"test2", reshape(arange(6), {3, 2})}};
save_gguf(file_path, map);
auto loaded = load_gguf(file_path);
CHECK_EQ(loaded.size(), 2);
CHECK_EQ(loaded.count("test"), 1);
CHECK_EQ(loaded.count("test2"), 1);
for (auto [k, v] : loaded) {
CHECK(array_equal(v, map.at(k)).item<bool>());
{
// Check saving loading just arrays, no metadata
save_gguf(file_path, original_weights);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 0);
CHECK_EQ(loaded_weights.size(), 2);
CHECK_EQ(loaded_weights.count("test"), 1);
CHECK_EQ(loaded_weights.count("test2"), 1);
for (auto [k, v] : loaded_weights) {
CHECK(array_equal(v, original_weights.at(k)).item<bool>());
}
}
// Test saving and loading string metadata
std::unordered_map<std::string, MetaData> original_metadata;
original_metadata.insert({"test_str", "my string"});
save_gguf(file_path, original_weights, original_metadata);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 1);
CHECK_EQ(loaded_metadata.count("test_str"), 1);
CHECK_EQ(std::get<std::string>(loaded_metadata.at("test_str")), "my string");
CHECK_EQ(loaded_weights.size(), 2);
CHECK_EQ(loaded_weights.count("test"), 1);
CHECK_EQ(loaded_weights.count("test2"), 1);
for (auto [k, v] : loaded_weights) {
CHECK(array_equal(v, original_weights.at(k)).item<bool>());
}
std::vector<Dtype> unsupported_types = {
bool_, uint8, uint32, uint64, int64, bfloat16, complex64};
for (auto t : unsupported_types) {
dict to_save = {{"test", astype(arange(5), t)}};
CHECK_THROWS(save_gguf(file_path, to_save));
CHECK_THROWS(save_gguf(file_path, to_save, original_metadata));
}
std::vector<Dtype> supported_types = {int8, int32, float16};
std::vector<Dtype> supported_types = {int8, int32, float16, float32};
for (auto t : supported_types) {
auto arr = astype(arange(5), t);
dict to_save = {{"test", arr}};
save_gguf(file_path, to_save);
auto loaded = load_gguf(file_path);
CHECK(array_equal(loaded.at("test"), arr).item<bool>());
save_gguf(file_path, to_save, original_metadata);
const auto& [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK(array_equal(loaded_weights.at("test"), arr).item<bool>());
}
}
TEST_CASE("test gguf metadata") {
std::string file_path = get_temp_file("test_arr.gguf");
using dict = std::unordered_map<std::string, array>;
dict original_weights = {
{"test", array({1.0f, 2.0f, 3.0f, 4.0f})},
{"test2", reshape(arange(6), {3, 2})}};
// Scalar array
{
std::unordered_map<std::string, MetaData> original_metadata;
original_metadata.insert({"test_arr", array(1.0)});
save_gguf(file_path, original_weights, original_metadata);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 1);
CHECK_EQ(loaded_metadata.count("test_arr"), 1);
auto arr = std::get<array>(loaded_metadata.at("test_arr"));
CHECK_EQ(arr.item<float>(), 1.0f);
}
// 1D Array
{
std::unordered_map<std::string, MetaData> original_metadata;
auto arr = array({1.0, 2.0});
original_metadata.insert({"test_arr", arr});
save_gguf(file_path, original_weights, original_metadata);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 1);
CHECK_EQ(loaded_metadata.count("test_arr"), 1);
auto loaded_arr = std::get<array>(loaded_metadata.at("test_arr"));
CHECK(array_equal(arr, loaded_arr).item<bool>());
// Preserves dims
arr = array({1.0});
original_metadata["test_arr"] = arr;
save_gguf(file_path, original_weights, original_metadata);
std::tie(loaded_weights, loaded_metadata) = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 1);
CHECK_EQ(loaded_metadata.count("test_arr"), 1);
loaded_arr = std::get<array>(loaded_metadata.at("test_arr"));
CHECK(array_equal(arr, loaded_arr).item<bool>());
}
// > 1D array throws
{
std::unordered_map<std::string, MetaData> original_metadata;
original_metadata.insert({"test_arr", array({1.0}, {1, 1})});
CHECK_THROWS(save_gguf(file_path, original_weights, original_metadata));
}
// empty array throws
{
std::unordered_map<std::string, MetaData> original_metadata;
original_metadata.insert({"test_arr", array({})});
CHECK_THROWS(save_gguf(file_path, original_weights, original_metadata));
}
// vector of string
{
std::unordered_map<std::string, MetaData> original_metadata;
std::vector<std::string> data = {"data1", "data2", "data1234"};
original_metadata.insert({"meta", data});
save_gguf(file_path, original_weights, original_metadata);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 1);
CHECK_EQ(loaded_metadata.count("meta"), 1);
auto& strs = std::get<std::vector<std::string>>(loaded_metadata["meta"]);
CHECK_EQ(strs.size(), 3);
for (int i = 0; i < strs.size(); ++i) {
CHECK_EQ(strs[i], data[i]);
}
}
// vector of string, string, scalar, and array
{
std::unordered_map<std::string, MetaData> original_metadata;
std::vector<std::string> data = {"data1", "data2", "data1234"};
original_metadata.insert({"meta1", data});
original_metadata.insert({"meta2", array(2.5)});
original_metadata.insert({"meta3", array({1, 2, 3})});
original_metadata.insert({"meta4", "last"});
save_gguf(file_path, original_weights, original_metadata);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 4);
auto& strs = std::get<std::vector<std::string>>(loaded_metadata["meta1"]);
CHECK_EQ(strs.size(), 3);
for (int i = 0; i < strs.size(); ++i) {
CHECK_EQ(strs[i], data[i]);
}
auto& arr = std::get<array>(loaded_metadata["meta2"]);
CHECK_EQ(arr.item<float>(), 2.5);
arr = std::get<array>(loaded_metadata["meta3"]);
CHECK(array_equal(arr, array({1, 2, 3})).item<bool>());
auto& str = std::get<std::string>(loaded_metadata["meta4"]);
CHECK_EQ(str, "last");
}
}