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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdlib.h>
#include <sstream>
#include "device/device.h"
#include "device/device_intern.h"
#include "device/device_network.h"
#include "render/buffers.h"
#include "util/util_foreach.h"
#include "util/util_list.h"
#include "util/util_logging.h"
#include "util/util_map.h"
#include "util/util_time.h"
CCL_NAMESPACE_BEGIN
class MultiDevice : public Device {
public:
struct SubDevice {
explicit SubDevice(Device *device_) : device(device_)
{
}
Device *device;
map<device_ptr, device_ptr> ptr_map;
};
list<SubDevice> devices;
device_ptr unique_key;
MultiDevice(DeviceInfo &info, Stats &stats, Profiler &profiler, bool background_)
: Device(info, stats, profiler, background_), unique_key(1)
{
foreach (DeviceInfo &subinfo, info.multi_devices) {
Device *device = Device::create(subinfo, sub_stats_, profiler, background);
/* Always add CPU devices at the back since GPU devices can change
* host memory pointers, which CPU uses as device pointer. */
if (subinfo.type == DEVICE_CPU) {
devices.push_back(SubDevice(device));
}
else {
devices.push_front(SubDevice(device));
}
}
#ifdef WITH_NETWORK
/* try to add network devices */
ServerDiscovery discovery(true);
time_sleep(1.0);
vector<string> servers = discovery.get_server_list();
foreach (string &server, servers) {
Device *device = device_network_create(info, stats, profiler, server.c_str());
if (device)
devices.push_back(SubDevice(device));
}
#endif
}
~MultiDevice()
{
foreach (SubDevice &sub, devices)
delete sub.device;
}
const string &error_message()
{
foreach (SubDevice &sub, devices) {
if (sub.device->error_message() != "") {
if (error_msg == "")
error_msg = sub.device->error_message();
break;
}
}
return error_msg;
}
virtual bool show_samples() const
{
if (devices.size() > 1) {
return false;
}
return devices.front().device->show_samples();
}
virtual BVHLayoutMask get_bvh_layout_mask() const
{
BVHLayoutMask bvh_layout_mask = BVH_LAYOUT_ALL;
foreach (const SubDevice &sub_device, devices) {
bvh_layout_mask &= sub_device.device->get_bvh_layout_mask();
}
return bvh_layout_mask;
}
bool load_kernels(const DeviceRequestedFeatures &requested_features)
{
foreach (SubDevice &sub, devices)
if (!sub.device->load_kernels(requested_features))
return false;
return true;
}
bool wait_for_availability(const DeviceRequestedFeatures &requested_features)
{
foreach (SubDevice &sub, devices)
if (!sub.device->wait_for_availability(requested_features))
return false;
return true;
}
DeviceKernelStatus get_active_kernel_switch_state()
{
DeviceKernelStatus result = DEVICE_KERNEL_USING_FEATURE_KERNEL;
foreach (SubDevice &sub, devices) {
DeviceKernelStatus subresult = sub.device->get_active_kernel_switch_state();
switch (subresult) {
case DEVICE_KERNEL_WAITING_FOR_FEATURE_KERNEL:
result = subresult;
break;
case DEVICE_KERNEL_FEATURE_KERNEL_INVALID:
case DEVICE_KERNEL_FEATURE_KERNEL_AVAILABLE:
return subresult;
case DEVICE_KERNEL_USING_FEATURE_KERNEL:
case DEVICE_KERNEL_UNKNOWN:
break;
}
}
return result;
}
bool build_optix_bvh(BVH *bvh, device_memory &mem)
{
device_ptr key = unique_key++;
// Broadcast acceleration structure build to all devices
foreach (SubDevice &sub, devices) {
mem.device = sub.device;
if (!sub.device->build_optix_bvh(bvh, mem))
return false;
sub.ptr_map[key] = mem.device_pointer;
}
mem.device = this;
mem.device_pointer = key;
stats.mem_alloc(mem.device_size);
return true;
}
void mem_alloc(device_memory &mem)
{
device_ptr key = unique_key++;
foreach (SubDevice &sub, devices) {
mem.device = sub.device;
mem.device_pointer = 0;
mem.device_size = 0;
sub.device->mem_alloc(mem);
sub.ptr_map[key] = mem.device_pointer;
}
mem.device = this;
mem.device_pointer = key;
stats.mem_alloc(mem.device_size);
}
void mem_copy_to(device_memory &mem)
{
device_ptr existing_key = mem.device_pointer;
device_ptr key = (existing_key) ? existing_key : unique_key++;
size_t existing_size = mem.device_size;
foreach (SubDevice &sub, devices) {
mem.device = sub.device;
mem.device_pointer = (existing_key) ? sub.ptr_map[existing_key] : 0;
mem.device_size = existing_size;
sub.device->mem_copy_to(mem);
sub.ptr_map[key] = mem.device_pointer;
}
mem.device = this;
mem.device_pointer = key;
stats.mem_alloc(mem.device_size - existing_size);
}
void mem_copy_from(device_memory &mem, int y, int w, int h, int elem)
{
device_ptr key = mem.device_pointer;
int i = 0, sub_h = h / devices.size();
foreach (SubDevice &sub, devices) {
int sy = y + i * sub_h;
int sh = (i == (int)devices.size() - 1) ? h - sub_h * i : sub_h;
mem.device = sub.device;
mem.device_pointer = sub.ptr_map[key];
sub.device->mem_copy_from(mem, sy, w, sh, elem);
i++;
}
mem.device = this;
mem.device_pointer = key;
}
void mem_zero(device_memory &mem)
{
device_ptr existing_key = mem.device_pointer;
device_ptr key = (existing_key) ? existing_key : unique_key++;
size_t existing_size = mem.device_size;
foreach (SubDevice &sub, devices) {
mem.device = sub.device;
mem.device_pointer = (existing_key) ? sub.ptr_map[existing_key] : 0;
mem.device_size = existing_size;
sub.device->mem_zero(mem);
sub.ptr_map[key] = mem.device_pointer;
}
mem.device = this;
mem.device_pointer = key;
stats.mem_alloc(mem.device_size - existing_size);
}
void mem_free(device_memory &mem)
{
device_ptr key = mem.device_pointer;
size_t existing_size = mem.device_size;
foreach (SubDevice &sub, devices) {
mem.device = sub.device;
mem.device_pointer = sub.ptr_map[key];
mem.device_size = existing_size;
sub.device->mem_free(mem);
sub.ptr_map.erase(sub.ptr_map.find(key));
}
mem.device = this;
mem.device_pointer = 0;
mem.device_size = 0;
stats.mem_free(existing_size);
}
void const_copy_to(const char *name, void *host, size_t size)
{
foreach (SubDevice &sub, devices)
sub.device->const_copy_to(name, host, size);
}
void draw_pixels(device_memory &rgba,
int y,
int w,
int h,
int width,
int height,
int dx,
int dy,
int dw,
int dh,
bool transparent,
const DeviceDrawParams &draw_params)
{
device_ptr key = rgba.device_pointer;
int i = 0, sub_h = h / devices.size();
int sub_height = height / devices.size();
foreach (SubDevice &sub, devices) {
int sy = y + i * sub_h;
int sh = (i == (int)devices.size() - 1) ? h - sub_h * i : sub_h;
int sheight = (i == (int)devices.size() - 1) ? height - sub_height * i : sub_height;
int sdy = dy + i * sub_height;
/* adjust math for w/width */
rgba.device_pointer = sub.ptr_map[key];
sub.device->draw_pixels(
rgba, sy, w, sh, width, sheight, dx, sdy, dw, dh, transparent, draw_params);
i++;
}
rgba.device_pointer = key;
}
void map_tile(Device *sub_device, RenderTile &tile)
{
foreach (SubDevice &sub, devices) {
if (sub.device == sub_device) {
if (tile.buffer)
tile.buffer = sub.ptr_map[tile.buffer];
}
}
}
int device_number(Device *sub_device)
{
int i = 0;
foreach (SubDevice &sub, devices) {
if (sub.device == sub_device)
return i;
i++;
}
return -1;
}
void map_neighbor_tiles(Device *sub_device, RenderTile *tiles)
{
for (int i = 0; i < 9; i++) {
if (!tiles[i].buffers) {
continue;
}
/* If the tile was rendered on another device, copy its memory to
* to the current device now, for the duration of the denoising task.
* Note that this temporarily modifies the RenderBuffers and calls
* the device, so this function is not thread safe. */
device_vector<float> &mem = tiles[i].buffers->buffer;
if (mem.device != sub_device) {
/* Only copy from device to host once. This is faster, but
* also required for the case where a CPU thread is denoising
* a tile rendered on the GPU. In that case we have to avoid
* overwriting the buffer being denoised by the CPU thread. */
if (!tiles[i].buffers->map_neighbor_copied) {
tiles[i].buffers->map_neighbor_copied = true;
mem.copy_from_device(0, mem.data_size, 1);
}
mem.swap_device(sub_device, 0, 0);
mem.copy_to_device();
tiles[i].buffer = mem.device_pointer;
tiles[i].device_size = mem.device_size;
mem.restore_device();
}
}
}
void unmap_neighbor_tiles(Device *sub_device, RenderTile *tiles)
{
/* Copy denoised result back to the host. */
device_vector<float> &mem = tiles[9].buffers->buffer;
mem.swap_device(sub_device, tiles[9].device_size, tiles[9].buffer);
mem.copy_from_device(0, mem.data_size, 1);
mem.restore_device();
/* Copy denoised result to the original device. */
mem.copy_to_device();
for (int i = 0; i < 9; i++) {
if (!tiles[i].buffers) {
continue;
}
device_vector<float> &mem = tiles[i].buffers->buffer;
if (mem.device != sub_device) {
mem.swap_device(sub_device, tiles[i].device_size, tiles[i].buffer);
sub_device->mem_free(mem);
mem.restore_device();
}
}
}
int get_split_task_count(DeviceTask &task)
{
int total_tasks = 0;
list<DeviceTask> tasks;
task.split(tasks, devices.size());
foreach (SubDevice &sub, devices) {
if (!tasks.empty()) {
DeviceTask subtask = tasks.front();
tasks.pop_front();
total_tasks += sub.device->get_split_task_count(subtask);
}
}
return total_tasks;
}
void task_add(DeviceTask &task)
{
list<DeviceTask> tasks;
task.split(tasks, devices.size());
foreach (SubDevice &sub, devices) {
if (!tasks.empty()) {
DeviceTask subtask = tasks.front();
tasks.pop_front();
if (task.buffer)
subtask.buffer = sub.ptr_map[task.buffer];
if (task.rgba_byte)
subtask.rgba_byte = sub.ptr_map[task.rgba_byte];
if (task.rgba_half)
subtask.rgba_half = sub.ptr_map[task.rgba_half];
if (task.shader_input)
subtask.shader_input = sub.ptr_map[task.shader_input];
if (task.shader_output)
subtask.shader_output = sub.ptr_map[task.shader_output];
sub.device->task_add(subtask);
}
}
}
void task_wait()
{
foreach (SubDevice &sub, devices)
sub.device->task_wait();
}
void task_cancel()
{
foreach (SubDevice &sub, devices)
sub.device->task_cancel();
}
protected:
Stats sub_stats_;
};
Device *device_multi_create(DeviceInfo &info, Stats &stats, Profiler &profiler, bool background)
{
return new MultiDevice(info, stats, profiler, background);
}
CCL_NAMESPACE_END
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