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llama.cpp
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metal : support virtual devices

This commit is contained in:
Georgi Gerganov 2026-01-18 15:37:25 +02:00
parent 89f10baad5
commit 7758a58aa8
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GPG Key ID: 449E073F9DC10735
6 changed files with 224 additions and 101 deletions
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2
ggml/src/ggml-metal/ggml-metal-context.h
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@ -15,6 +15,8 @@ typedef struct ggml_metal * ggml_metal_t;
ggml_metal_t ggml_metal_init(ggml_metal_device_t dev);
void ggml_metal_free(ggml_metal_t ctx);
const char * ggml_metal_get_name(ggml_metal_t ctx);
void ggml_metal_synchronize(ggml_metal_t ctx);
void ggml_metal_set_tensor_async(ggml_metal_t ctx, struct ggml_tensor * tensor, const void * data, size_t offset, size_t size);

10
ggml/src/ggml-metal/ggml-metal-context.m
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@ -24,6 +24,8 @@ struct ggml_metal_command_buffer {
};
struct ggml_metal {
char name[128];
ggml_metal_device_t dev;
ggml_metal_library_t lib;
@ -117,7 +119,9 @@ ggml_metal_t ggml_metal_init(ggml_metal_device_t dev) {
}
}
//const struct ggml_metal_device_props * props_dev = ggml_metal_device_get_props(dev);
const struct ggml_metal_device_props * props_dev = ggml_metal_device_get_props(dev);
snprintf(res->name, sizeof(res->name), "%s", props_dev->name);
res->d_queue = dispatch_queue_create("ggml-metal", DISPATCH_QUEUE_CONCURRENT);
@ -209,6 +213,10 @@ void ggml_metal_free(ggml_metal_t ctx) {
free(ctx);
}
const char * ggml_metal_get_name(ggml_metal_t ctx) {
return ctx->name;
}
void ggml_metal_synchronize(ggml_metal_t ctx) {
// wait for any backend operations to finish
if (ctx->cmd_buf_last) {

8
ggml/src/ggml-metal/ggml-metal-device.cpp
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@ -17,10 +17,12 @@ struct ggml_metal_device_deleter {
typedef std::unique_ptr<ggml_metal_device, ggml_metal_device_deleter> ggml_metal_device_ptr;
ggml_metal_device_t ggml_metal_device_get(void) {
static ggml_metal_device_ptr ctx { ggml_metal_device_init() };
ggml_metal_device_t ggml_metal_device_get(int device) {
static std::vector<ggml_metal_device_ptr> devs;
return ctx.get();
devs.emplace_back(ggml_metal_device_init(device));
return devs.back().get();
}
struct ggml_metal_pipelines {

7
ggml/src/ggml-metal/ggml-metal-device.h
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@ -205,7 +205,9 @@ void ggml_metal_rsets_free(ggml_metal_rsets_t rsets);
//
struct ggml_metal_device_props {
int device;
char name[128];
char desc[128];
size_t max_buffer_size;
size_t max_working_set_size;
@ -224,11 +226,10 @@ struct ggml_metal_device_props {
int op_offload_min_batch_size;
};
ggml_metal_device_t ggml_metal_device_init(void);
ggml_metal_device_t ggml_metal_device_init(int device);
void ggml_metal_device_free(ggml_metal_device_t dev);
// return a singleton that is automatically destroyed when the program exits
ggml_metal_device_t ggml_metal_device_get(void);
ggml_metal_device_t ggml_metal_device_get(int device);
void * ggml_metal_device_get_obj (ggml_metal_device_t dev); // id<MTLDevice>
void * ggml_metal_device_get_queue(ggml_metal_device_t dev); // id<MTLCommandQueue>

18
ggml/src/ggml-metal/ggml-metal-device.m
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@ -24,9 +24,6 @@
static const NSInteger MTLGPUFamilyMetal3_GGML = 5001;
static const NSInteger MTLGPUFamilyMetal4_GGML = 5002;
// virtual address for GPU memory allocations
static atomic_uintptr_t g_addr_device = 0x000000400ULL;
#if !GGML_METAL_EMBED_LIBRARY
// Here to assist with NSBundle Path Hack
@interface GGMLMetalClass : NSObject
@ -523,6 +520,9 @@ struct ggml_metal_device {
ggml_metal_library_t library;
struct ggml_metal_device_props props;
// virtual address for GPU memory allocations
atomic_uintptr_t addr_virt;
};
//
@ -618,7 +618,7 @@ void ggml_metal_rsets_free(ggml_metal_rsets_t rsets) {
free(rsets);
}
ggml_metal_device_t ggml_metal_device_init(void) {
ggml_metal_device_t ggml_metal_device_init(int device) {
ggml_metal_device_t dev = calloc(1, sizeof(struct ggml_metal_device));
assert(dev != NULL);
@ -632,6 +632,9 @@ ggml_metal_device_t ggml_metal_device_init(void) {
GGML_LOG_ERROR("%s: error: failed to create command queue\n", __func__);
}
dev->addr_virt = 0x000000400ULL;
dev->props.device = device;
dev->props.has_simdgroup_reduction = [dev->mtl_device supportsFamily:MTLGPUFamilyApple7];
dev->props.has_simdgroup_reduction |= [dev->mtl_device supportsFamily:MTLGPUFamilyMetal3_GGML];
@ -792,7 +795,8 @@ ggml_metal_device_t ggml_metal_device_init(void) {
dev->props.max_working_set_size = dev->mtl_device.maxBufferLength;
}
strncpy(dev->props.name, [[dev->mtl_device name] UTF8String], sizeof(dev->props.name) - 1);
snprintf(dev->props.name, sizeof(dev->props.name), "%s%d", "MTL", device);
snprintf(dev->props.desc, sizeof(dev->props.desc), "%s", [[dev->mtl_device name] UTF8String]);
dev->library = ggml_metal_library_init(dev);
if (!dev->library) {
@ -1344,8 +1348,8 @@ ggml_metal_buffer_t ggml_metal_buffer_init(ggml_metal_device_t dev, size_t size,
res->all_data = ggml_metal_host_malloc(size_aligned);
res->is_shared = true;
} else {
// use virtual address from g_addr_device counter
res->all_data = (void *) atomic_fetch_add_explicit(&g_addr_device, size_aligned, memory_order_relaxed);
// use virtual address
res->all_data = (void *) atomic_fetch_add_explicit(&dev->addr_virt, size_aligned, memory_order_relaxed);
res->is_shared = false;
}
res->all_size = size_aligned;

280
ggml/src/ggml-metal/ggml-metal.cpp
View File

@ -7,11 +7,12 @@
#include "ggml-metal-context.h"
#include "ggml-metal-ops.h"
// globals
#define GGML_METAL_NAME "MTL"
#define GGML_METAL_MAX_DEVICES 16
// initialized in ggml_backend_metal_reg
static ggml_backend_reg g_ggml_metal_reg;
static ggml_backend_device g_ggml_metal_device;
// number of Metal devices
// note: can be overriden with GGML_METAL_DEVICES env to simulate virtual devices
static int g_devices = 1;
////////////////////////////////////////////////////////////////////////////////
// backend interface
@ -169,6 +170,11 @@ static ggml_backend_buffer_i ggml_backend_metal_buffer_private_i = {
// buffer types
//
struct ggml_backend_metal_buffer_type {
int device;
std::string name;
};
// common method for allocating shread or private Metal buffers
static ggml_backend_buffer_t ggml_backend_metal_buffer_type_alloc_buffer(ggml_backend_buffer_type_t buft, size_t size, bool shared) {
ggml_metal_device_t ctx_dev = (ggml_metal_device_t)buft->device->context;
@ -218,9 +224,9 @@ static size_t ggml_backend_metal_buffer_type_get_alloc_size(ggml_backend_buffer_
// default (shared) buffer type
static const char * ggml_backend_metal_buffer_type_shared_get_name(ggml_backend_buffer_type_t buft) {
return "Metal";
ggml_backend_metal_buffer_type * ctx = (ggml_backend_metal_buffer_type *)buft->context;
GGML_UNUSED(buft);
return ctx->name.c_str();
}
static ggml_backend_buffer_t ggml_backend_metal_buffer_type_shared_alloc_buffer(ggml_backend_buffer_type_t buft, size_t size) {
@ -249,29 +255,41 @@ static bool ggml_backend_metal_buffer_type_shared_is_host(ggml_backend_buffer_ty
GGML_UNUSED(buft);
}
static ggml_backend_buffer_type_t ggml_backend_metal_buffer_type_shared(void) {
static ggml_backend_buffer_type ggml_backend_buffer_type_metal = {
/* .iface = */ {
/* .get_name = */ ggml_backend_metal_buffer_type_shared_get_name,
/* .alloc_buffer = */ ggml_backend_metal_buffer_type_shared_alloc_buffer,
/* .get_alignment = */ ggml_backend_metal_buffer_type_shared_get_alignment,
/* .get_max_size = */ ggml_backend_metal_buffer_type_shared_get_max_size,
/* .get_alloc_size = */ ggml_backend_metal_buffer_type_shared_get_alloc_size,
/* .is_host = */ ggml_backend_metal_buffer_type_shared_is_host,
},
/* .device = */ &g_ggml_metal_device,
/* .context = */ NULL,
static ggml_backend_buffer_type_t ggml_backend_metal_buffer_type_shared(int device) {
static std::mutex mutex;
std::lock_guard<std::mutex> lock(mutex);
static ggml_backend_buffer_type bufts[GGML_METAL_MAX_DEVICES];
static bool initialized = false;
if (!initialized) {
for (int i = 0; i < g_devices; ++i) {
bufts[i] = {
/* .iface = */ {
/* .get_name = */ ggml_backend_metal_buffer_type_shared_get_name,
/* .alloc_buffer = */ ggml_backend_metal_buffer_type_shared_alloc_buffer,
/* .get_alignment = */ ggml_backend_metal_buffer_type_shared_get_alignment,
/* .get_max_size = */ ggml_backend_metal_buffer_type_shared_get_max_size,
/* .get_alloc_size = */ ggml_backend_metal_buffer_type_shared_get_alloc_size,
/* .is_host = */ ggml_backend_metal_buffer_type_shared_is_host,
},
/* .device = */ ggml_backend_reg_dev_get(ggml_backend_metal_reg(), i),
/* .context = */ new ggml_backend_metal_buffer_type{i, GGML_METAL_NAME + std::to_string(i)},
};
}
initialized = true;
};
return &ggml_backend_buffer_type_metal;
return &bufts[device];
}
// default (private) buffer type
static const char * ggml_backend_metal_buffer_type_private_get_name(ggml_backend_buffer_type_t buft) {
return "Metal_Private";
ggml_backend_metal_buffer_type * ctx = (ggml_backend_metal_buffer_type *)buft->context;
GGML_UNUSED(buft);
return ctx->name.c_str();
}
static ggml_backend_buffer_t ggml_backend_metal_buffer_type_private_alloc_buffer(ggml_backend_buffer_type_t buft, size_t size) {
@ -300,29 +318,41 @@ static bool ggml_backend_metal_buffer_type_private_is_host(ggml_backend_buffer_t
GGML_UNUSED(buft);
}
static ggml_backend_buffer_type_t ggml_backend_metal_buffer_type_private(void) {
static ggml_backend_buffer_type ggml_backend_buffer_type_metal = {
/* .iface = */ {
/* .get_name = */ ggml_backend_metal_buffer_type_private_get_name,
/* .alloc_buffer = */ ggml_backend_metal_buffer_type_private_alloc_buffer,
/* .get_alignment = */ ggml_backend_metal_buffer_type_private_get_alignment,
/* .get_max_size = */ ggml_backend_metal_buffer_type_private_get_max_size,
/* .get_alloc_size = */ ggml_backend_metal_buffer_type_private_get_alloc_size,
/* .is_host = */ ggml_backend_metal_buffer_type_private_is_host,
},
/* .device = */ &g_ggml_metal_device,
/* .context = */ NULL,
static ggml_backend_buffer_type_t ggml_backend_metal_buffer_type_private(int device) {
static std::mutex mutex;
std::lock_guard<std::mutex> lock(mutex);
static ggml_backend_buffer_type bufts[GGML_METAL_MAX_DEVICES];
static bool initialized = false;
if (!initialized) {
for (int i = 0; i < g_devices; ++i) {
bufts[i] = {
/* .iface = */ {
/* .get_name = */ ggml_backend_metal_buffer_type_private_get_name,
/* .alloc_buffer = */ ggml_backend_metal_buffer_type_private_alloc_buffer,
/* .get_alignment = */ ggml_backend_metal_buffer_type_private_get_alignment,
/* .get_max_size = */ ggml_backend_metal_buffer_type_private_get_max_size,
/* .get_alloc_size = */ ggml_backend_metal_buffer_type_private_get_alloc_size,
/* .is_host = */ ggml_backend_metal_buffer_type_private_is_host,
},
/* .device = */ ggml_backend_reg_dev_get(ggml_backend_metal_reg(), i),
/* .context = */ new ggml_backend_metal_buffer_type{i, GGML_METAL_NAME + std::to_string(i) + "_Private"},
};
}
initialized = true;
};
return &ggml_backend_buffer_type_metal;
return &bufts[device];
}
// mapped buffer type
static const char * ggml_backend_metal_buffer_type_mapped_get_name(ggml_backend_buffer_type_t buft) {
return "Metal_Mapped";
ggml_backend_metal_buffer_type * ctx = (ggml_backend_metal_buffer_type *)buft->context;
GGML_UNUSED(buft);
return ctx->name.c_str();
}
static ggml_backend_buffer_t ggml_backend_metal_buffer_type_mapped_alloc_buffer(ggml_backend_buffer_type_t buft, size_t size) {
@ -352,31 +382,43 @@ static bool ggml_backend_metal_buffer_type_mapped_is_host(ggml_backend_buffer_ty
GGML_UNUSED(buft);
}
static ggml_backend_buffer_type_t ggml_backend_metal_buffer_type_mapped(void) {
// note: not obvious, but this buffer type still needs to implement .alloc_buffer:
// https://github.com/ggml-org/llama.cpp/pull/15832#discussion_r2333177099
static ggml_backend_buffer_type ggml_backend_buffer_type_mapped_metal = {
/* .iface = */ {
/* .get_name = */ ggml_backend_metal_buffer_type_mapped_get_name,
/* .alloc_buffer = */ ggml_backend_metal_buffer_type_mapped_alloc_buffer,
/* .get_alignment = */ ggml_backend_metal_buffer_type_mapped_get_alignment,
/* .get_max_size = */ ggml_backend_metal_buffer_type_mapped_get_max_size,
/* .get_alloc_size = */ ggml_backend_metal_buffer_type_mapped_get_alloc_size,
/* .is_host = */ ggml_backend_metal_buffer_type_mapped_is_host,
},
/* .device = */ &g_ggml_metal_device,
/* .context = */ NULL,
static ggml_backend_buffer_type_t ggml_backend_metal_buffer_type_mapped(int device) {
static std::mutex mutex;
std::lock_guard<std::mutex> lock(mutex);
static ggml_backend_buffer_type bufts[GGML_METAL_MAX_DEVICES];
static bool initialized = false;
if (!initialized) {
for (int i = 0; i < g_devices; ++i) {
// note: not obvious, but this buffer type still needs to implement .alloc_buffer:
// https://github.com/ggml-org/llama.cpp/pull/15832#discussion_r2333177099
bufts[i] = {
/* .iface = */ {
/* .get_name = */ ggml_backend_metal_buffer_type_mapped_get_name,
/* .alloc_buffer = */ ggml_backend_metal_buffer_type_mapped_alloc_buffer,
/* .get_alignment = */ ggml_backend_metal_buffer_type_mapped_get_alignment,
/* .get_max_size = */ ggml_backend_metal_buffer_type_mapped_get_max_size,
/* .get_alloc_size = */ ggml_backend_metal_buffer_type_mapped_get_alloc_size,
/* .is_host = */ ggml_backend_metal_buffer_type_mapped_is_host,
},
/* .device = */ ggml_backend_reg_dev_get(ggml_backend_metal_reg(), i),
/* .context = */ new ggml_backend_metal_buffer_type{i, GGML_METAL_NAME + std::to_string(i) + "_Mapped"},
};
}
initialized = true;
};
return &ggml_backend_buffer_type_mapped_metal;
return &bufts[device];
}
// backend
static const char * ggml_backend_metal_name(ggml_backend_t backend) {
return "Metal";
ggml_metal_t ctx = (ggml_metal_t)backend->context;
GGML_UNUSED(backend);
return ggml_metal_get_name(ctx);
}
static void ggml_backend_metal_free(ggml_backend_t backend) {
@ -435,7 +477,6 @@ static void ggml_backend_metal_set_n_cb(ggml_backend_t backend, int n_cb) {
ggml_metal_t ctx = (ggml_metal_t)backend->context;
ggml_metal_set_n_cb(ctx, n_cb);
}
static ggml_backend_i ggml_backend_metal_i = {
@ -519,15 +560,17 @@ void ggml_backend_metal_capture_next_compute(ggml_backend_t backend) {
// backend device
static const char * ggml_backend_metal_device_get_name(ggml_backend_dev_t dev) {
return "Metal";
ggml_metal_device_t ctx_dev = (ggml_metal_device_t)dev->context;
GGML_UNUSED(dev);
const ggml_metal_device_props * props_dev = ggml_metal_device_get_props(ctx_dev);
return props_dev->name;
}
static const char * ggml_backend_metal_device_get_description(ggml_backend_dev_t dev) {
ggml_metal_device_t ctx_dev = (ggml_metal_device_t)dev->context;
return ggml_metal_device_get_props(ctx_dev)->name;
return ggml_metal_device_get_props(ctx_dev)->desc;
}
static void ggml_backend_metal_device_get_memory(ggml_backend_dev_t dev, size_t * free, size_t * total) {
@ -557,7 +600,7 @@ static void ggml_backend_metal_device_get_props(ggml_backend_dev_t dev, ggml_bac
};
}
static ggml_backend_t ggml_backend_metal_device_init(ggml_backend_dev_t dev, const char * params) {
static ggml_backend_t ggml_backend_metal_device_init_backend(ggml_backend_dev_t dev, const char * params) {
ggml_metal_device_t ctx_dev = (ggml_metal_device_t)dev->context;
ggml_metal_t ctx = ggml_metal_init(ctx_dev);
@ -587,7 +630,7 @@ static ggml_backend_buffer_type_t ggml_backend_metal_device_get_buffer_type(ggml
const ggml_metal_device_props * props_dev = ggml_metal_device_get_props(ctx_dev);
return props_dev->use_shared_buffers ? ggml_backend_metal_buffer_type_shared() : ggml_backend_metal_buffer_type_private();
return props_dev->use_shared_buffers ? ggml_backend_metal_buffer_type_shared(props_dev->device) : ggml_backend_metal_buffer_type_private(props_dev->device);
}
static ggml_backend_buffer_t ggml_backend_metal_device_buffer_mapped(ggml_backend_dev_t dev, void * ptr, size_t size, size_t max_tensor_size) {
@ -595,7 +638,9 @@ static ggml_backend_buffer_t ggml_backend_metal_device_buffer_mapped(ggml_backen
ggml_metal_buffer_t res = ggml_metal_buffer_map(ctx_dev, ptr, size, max_tensor_size);
return ggml_backend_buffer_init(ggml_backend_metal_buffer_type_mapped(), ggml_backend_metal_buffer_shared_i, res, size);
const ggml_metal_device_props * props_dev = ggml_metal_device_get_props(ctx_dev);
return ggml_backend_buffer_init(ggml_backend_metal_buffer_type_mapped(props_dev->device), ggml_backend_metal_buffer_shared_i, res, size);
}
static bool ggml_backend_metal_device_supports_op(ggml_backend_dev_t dev, const ggml_tensor * op) {
@ -606,9 +651,10 @@ static bool ggml_backend_metal_device_supports_op(ggml_backend_dev_t dev, const
static bool ggml_backend_metal_device_supports_buft(ggml_backend_dev_t dev, ggml_backend_buffer_type_t buft) {
return
buft->device == dev && (
buft->iface.get_name == ggml_backend_metal_buffer_type_shared_get_name ||
buft->iface.get_name == ggml_backend_metal_buffer_type_private_get_name ||
buft->iface.get_name == ggml_backend_metal_buffer_type_mapped_get_name;
buft->iface.get_name == ggml_backend_metal_buffer_type_mapped_get_name);
GGML_UNUSED(dev);
}
@ -638,7 +684,7 @@ static ggml_backend_device_i ggml_backend_metal_device_i = {
/* .get_memory = */ ggml_backend_metal_device_get_memory,
/* .get_type = */ ggml_backend_metal_device_get_type,
/* .get_props = */ ggml_backend_metal_device_get_props,
/* .init_backend = */ ggml_backend_metal_device_init,
/* .init_backend = */ ggml_backend_metal_device_init_backend,
/* .get_buffer_type = */ ggml_backend_metal_device_get_buffer_type,
/* .get_host_buffer_type = */ NULL,
/* .buffer_from_host_ptr = */ ggml_backend_metal_device_buffer_mapped,
@ -652,25 +698,45 @@ static ggml_backend_device_i ggml_backend_metal_device_i = {
// backend registry
struct ggml_backend_metal_reg {
std::vector<ggml_backend_dev_t> devices;
};
typedef struct ggml_backend_metal_reg * ggml_backend_metal_reg_t;
static ggml_backend_metal_reg_t ggml_backend_metal_reg_init(void) {
ggml_backend_metal_reg_t ctx = new struct ggml_backend_metal_reg;
return ctx;
}
static void ggml_backend_metal_reg_free(ggml_backend_metal_reg_t ctx) {
delete ctx;
}
struct ggml_backend_metal_reg_deleter {
void operator()(ggml_backend_metal_reg_t ctx) {
ggml_backend_metal_reg_free(ctx);
}
};
typedef std::unique_ptr<struct ggml_backend_metal_reg, ggml_backend_metal_reg_deleter> ggml_backend_metal_reg_ptr;
static const char * ggml_backend_metal_reg_get_name(ggml_backend_reg_t reg) {
return "Metal";
return GGML_METAL_NAME;
GGML_UNUSED(reg);
}
static size_t ggml_backend_metal_reg_device_count(ggml_backend_reg_t reg) {
return 1;
GGML_UNUSED(reg);
ggml_backend_metal_reg_t ctx = (ggml_backend_metal_reg_t)reg->context;
return ctx->devices.size();
}
static ggml_backend_dev_t ggml_backend_metal_reg_device_get(ggml_backend_reg_t reg, size_t index) {
GGML_ASSERT(index == 0);
return &g_ggml_metal_device;
GGML_UNUSED(reg);
GGML_UNUSED(index);
ggml_backend_metal_reg_t ctx = (ggml_backend_metal_reg_t)reg->context;
GGML_ASSERT(index < ctx->devices.size());
return ctx->devices[index];
}
static ggml_backend_feature g_ggml_backend_metal_features[] = {
@ -698,27 +764,67 @@ static void * ggml_backend_metal_get_proc_address(ggml_backend_reg_t reg, const
static ggml_backend_reg_i ggml_backend_metal_reg_i = {
/* .get_name = */ ggml_backend_metal_reg_get_name,
/* .device_count = */ ggml_backend_metal_reg_device_count,
/* .device_get = */ ggml_backend_metal_reg_device_get,
/* .get_device_count = */ ggml_backend_metal_reg_device_count,
/* .get_device = */ ggml_backend_metal_reg_device_get,
/* .get_proc_address = */ ggml_backend_metal_get_proc_address,
};
ggml_backend_reg_t ggml_backend_metal_reg(void) {
{
g_ggml_metal_reg = {
/* .api_version = */ GGML_BACKEND_API_VERSION,
/* .iface = */ ggml_backend_metal_reg_i,
/* .context = */ NULL,
};
static ggml_backend_dev_t ggml_backend_metal_device_init(ggml_backend_reg_t reg, int device) {
return new ggml_backend_device {
/* .iface = */ ggml_backend_metal_device_i,
/* .reg = */ reg,
/* .context = */ ggml_metal_device_get(device),
};
}
g_ggml_metal_device = {
/* .iface = */ ggml_backend_metal_device_i,
/* .reg = */ &g_ggml_metal_reg,
/* .context = */ ggml_metal_device_get(),
};
static void ggml_backend_metal_device_free(ggml_backend_dev_t dev) {
delete dev;
}
struct ggml_backend_device_deleter {
void operator()(ggml_backend_dev_t ctx) {
ggml_backend_metal_device_free(ctx);
}
};
typedef std::unique_ptr<ggml_backend_device, ggml_backend_device_deleter> ggml_backend_device_ptr;
ggml_backend_reg_t ggml_backend_metal_reg(void) {
static ggml_backend_reg reg;
static bool initialized = false;
{
static std::mutex mutex;
std::lock_guard<std::mutex> lock(mutex);
const char * env = getenv("GGML_METAL_DEVICES");
if (env) {
g_devices = atoi(env);
}
static std::vector<ggml_backend_device_ptr> devs;
if (!initialized) {
static ggml_backend_metal_reg_ptr reg_ctx(ggml_backend_metal_reg_init());
for (int i = 0; i < g_devices; ++i) {
auto * dev = ggml_backend_metal_device_init(&reg, i);
devs.emplace_back(dev);
reg_ctx->devices.push_back(dev);
}
reg = {
/* .api_version = */ GGML_BACKEND_API_VERSION,
/* .iface = */ ggml_backend_metal_reg_i,
/* .context = */ reg_ctx.get(),
};
}
initialized = true;
}
return &g_ggml_metal_reg;
return &reg;
}
GGML_BACKEND_DL_IMPL(ggml_backend_metal_reg)