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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2021-2022 Blender Foundation */
#ifdef WITH_METAL
# include "device/metal/util.h"
# include "device/metal/device_impl.h"
# include "util/md5.h"
# include "util/path.h"
# include "util/string.h"
# include "util/time.h"
# include <IOKit/IOKitLib.h>
# include <pwd.h>
# include <sys/shm.h>
# include <time.h>
CCL_NAMESPACE_BEGIN
string MetalInfo::get_device_name(id<MTLDevice> device)
{
string device_name = [device.name UTF8String];
if (get_device_vendor(device) == METAL_GPU_APPLE) {
/* Append the GPU core count so we can distinguish between GPU variants in benchmarks. */
int gpu_core_count = get_apple_gpu_core_count(device);
device_name += string_printf(gpu_core_count ? " (GPU - %d cores)" : " (GPU)", gpu_core_count);
}
return device_name;
}
int MetalInfo::get_apple_gpu_core_count(id<MTLDevice> device)
{
int core_count = 0;
if (@available(macos 12.0, *)) {
io_service_t gpu_service = IOServiceGetMatchingService(
kIOMainPortDefault, IORegistryEntryIDMatching(device.registryID));
if (CFNumberRef numberRef = (CFNumberRef)IORegistryEntryCreateCFProperty(
gpu_service, CFSTR("gpu-core-count"), 0, 0)) {
if (CFGetTypeID(numberRef) == CFNumberGetTypeID()) {
CFNumberGetValue(numberRef, kCFNumberSInt32Type, &core_count);
}
CFRelease(numberRef);
}
}
return core_count;
}
AppleGPUArchitecture MetalInfo::get_apple_gpu_architecture(id<MTLDevice> device)
{
const char *device_name = [device.name UTF8String];
if (strstr(device_name, "M1")) {
return APPLE_M1;
}
else if (strstr(device_name, "M2")) {
return APPLE_M2;
}
return APPLE_UNKNOWN;
}
MetalGPUVendor MetalInfo::get_device_vendor(id<MTLDevice> device)
{
const char *device_name = [device.name UTF8String];
if (strstr(device_name, "Intel")) {
return METAL_GPU_INTEL;
}
else if (strstr(device_name, "AMD")) {
return METAL_GPU_AMD;
}
else if (strstr(device_name, "Apple")) {
return METAL_GPU_APPLE;
}
return METAL_GPU_UNKNOWN;
}
vector<id<MTLDevice>> const &MetalInfo::get_usable_devices()
{
static vector<id<MTLDevice>> usable_devices;
static bool already_enumerated = false;
if (already_enumerated) {
return usable_devices;
}
metal_printf("Usable Metal devices:\n");
for (id<MTLDevice> device in MTLCopyAllDevices()) {
string device_name = get_device_name(device);
MetalGPUVendor vendor = get_device_vendor(device);
bool usable = false;
if (@available(macos 12.2, *)) {
usable |= (vendor == METAL_GPU_APPLE);
}
if (@available(macos 12.3, *)) {
usable |= (vendor == METAL_GPU_AMD);
}
if (usable) {
metal_printf("- %s\n", device_name.c_str());
[device retain];
usable_devices.push_back(device);
}
else {
metal_printf(" (skipping \"%s\")\n", device_name.c_str());
}
}
if (usable_devices.empty()) {
metal_printf(" No usable Metal devices found\n");
}
already_enumerated = true;
return usable_devices;
}
id<MTLBuffer> MetalBufferPool::get_buffer(id<MTLDevice> device,
id<MTLCommandBuffer> command_buffer,
NSUInteger length,
MTLResourceOptions options,
const void *pointer,
Stats &stats)
{
id<MTLBuffer> buffer;
MTLStorageMode storageMode = MTLStorageMode((options & MTLResourceStorageModeMask) >>
MTLResourceStorageModeShift);
MTLCPUCacheMode cpuCacheMode = MTLCPUCacheMode((options & MTLResourceCPUCacheModeMask) >>
MTLResourceCPUCacheModeShift);
buffer_mutex.lock();
for (auto entry = buffer_free_list.begin(); entry != buffer_free_list.end(); entry++) {
MetalBufferListEntry bufferEntry = *entry;
/* Check if buffer matches size and storage mode and is old enough to reuse */
if (bufferEntry.buffer.length == length && storageMode == bufferEntry.buffer.storageMode &&
cpuCacheMode == bufferEntry.buffer.cpuCacheMode) {
buffer = bufferEntry.buffer;
buffer_free_list.erase(entry);
bufferEntry.command_buffer = command_buffer;
buffer_in_use_list.push_back(bufferEntry);
buffer_mutex.unlock();
/* Copy over data */
if (pointer) {
memcpy(buffer.contents, pointer, length);
if (bufferEntry.buffer.storageMode == MTLStorageModeManaged) {
[buffer didModifyRange:NSMakeRange(0, length)];
}
}
return buffer;
}
}
// NSLog(@"Creating buffer of length %lu (%lu)", length, frameCount);
if (pointer) {
buffer = [device newBufferWithBytes:pointer length:length options:options];
}
else {
buffer = [device newBufferWithLength:length options:options];
}
MetalBufferListEntry buffer_entry(buffer, command_buffer);
stats.mem_alloc(buffer.allocatedSize);
total_temp_mem_size += buffer.allocatedSize;
buffer_in_use_list.push_back(buffer_entry);
buffer_mutex.unlock();
return buffer;
}
void MetalBufferPool::process_command_buffer_completion(id<MTLCommandBuffer> command_buffer)
{
assert(command_buffer);
thread_scoped_lock lock(buffer_mutex);
/* Release all buffers that have not been recently reused back into the free pool */
for (auto entry = buffer_in_use_list.begin(); entry != buffer_in_use_list.end();) {
MetalBufferListEntry buffer_entry = *entry;
if (buffer_entry.command_buffer == command_buffer) {
entry = buffer_in_use_list.erase(entry);
buffer_entry.command_buffer = nil;
buffer_free_list.push_back(buffer_entry);
}
else {
entry++;
}
}
}
MetalBufferPool::~MetalBufferPool()
{
thread_scoped_lock lock(buffer_mutex);
/* Release all buffers that have not been recently reused */
for (auto entry = buffer_free_list.begin(); entry != buffer_free_list.end();) {
MetalBufferListEntry buffer_entry = *entry;
id<MTLBuffer> buffer = buffer_entry.buffer;
// NSLog(@"Releasing buffer of length %lu (%lu) (%lu outstanding)", buffer.length, frameCount,
// bufferFreeList.size());
total_temp_mem_size -= buffer.allocatedSize;
[buffer release];
entry = buffer_free_list.erase(entry);
}
}
CCL_NAMESPACE_END
#endif /* WITH_METAL */
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