96868a3941
Overflow led to the state buffer being too small and the split kernel to get stuck doing nothing forever.
297 lines
9.0 KiB
C++
297 lines
9.0 KiB
C++
/*
|
|
* Copyright 2011-2016 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 "device_split_kernel.h"
|
|
|
|
#include "kernel_types.h"
|
|
#include "kernel_split_data_types.h"
|
|
|
|
#include "util_time.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
static const double alpha = 0.1; /* alpha for rolling average */
|
|
|
|
DeviceSplitKernel::DeviceSplitKernel(Device *device) : device(device)
|
|
{
|
|
current_max_closure = -1;
|
|
first_tile = true;
|
|
|
|
avg_time_per_sample = 0.0;
|
|
|
|
kernel_path_init = NULL;
|
|
kernel_scene_intersect = NULL;
|
|
kernel_lamp_emission = NULL;
|
|
kernel_do_volume = NULL;
|
|
kernel_queue_enqueue = NULL;
|
|
kernel_indirect_background = NULL;
|
|
kernel_shader_eval = NULL;
|
|
kernel_holdout_emission_blurring_pathtermination_ao = NULL;
|
|
kernel_subsurface_scatter = NULL;
|
|
kernel_direct_lighting = NULL;
|
|
kernel_shadow_blocked_ao = NULL;
|
|
kernel_shadow_blocked_dl = NULL;
|
|
kernel_next_iteration_setup = NULL;
|
|
kernel_indirect_subsurface = NULL;
|
|
kernel_buffer_update = NULL;
|
|
}
|
|
|
|
DeviceSplitKernel::~DeviceSplitKernel()
|
|
{
|
|
device->mem_free(split_data);
|
|
device->mem_free(ray_state);
|
|
device->mem_free(use_queues_flag);
|
|
device->mem_free(queue_index);
|
|
device->mem_free(work_pool_wgs);
|
|
|
|
delete kernel_path_init;
|
|
delete kernel_scene_intersect;
|
|
delete kernel_lamp_emission;
|
|
delete kernel_do_volume;
|
|
delete kernel_queue_enqueue;
|
|
delete kernel_indirect_background;
|
|
delete kernel_shader_eval;
|
|
delete kernel_holdout_emission_blurring_pathtermination_ao;
|
|
delete kernel_subsurface_scatter;
|
|
delete kernel_direct_lighting;
|
|
delete kernel_shadow_blocked_ao;
|
|
delete kernel_shadow_blocked_dl;
|
|
delete kernel_next_iteration_setup;
|
|
delete kernel_indirect_subsurface;
|
|
delete kernel_buffer_update;
|
|
}
|
|
|
|
bool DeviceSplitKernel::load_kernels(const DeviceRequestedFeatures& requested_features)
|
|
{
|
|
#define LOAD_KERNEL(name) \
|
|
kernel_##name = get_split_kernel_function(#name, requested_features); \
|
|
if(!kernel_##name) { \
|
|
return false; \
|
|
}
|
|
|
|
LOAD_KERNEL(path_init);
|
|
LOAD_KERNEL(scene_intersect);
|
|
LOAD_KERNEL(lamp_emission);
|
|
LOAD_KERNEL(do_volume);
|
|
LOAD_KERNEL(queue_enqueue);
|
|
LOAD_KERNEL(indirect_background);
|
|
LOAD_KERNEL(shader_eval);
|
|
LOAD_KERNEL(holdout_emission_blurring_pathtermination_ao);
|
|
LOAD_KERNEL(subsurface_scatter);
|
|
LOAD_KERNEL(direct_lighting);
|
|
LOAD_KERNEL(shadow_blocked_ao);
|
|
LOAD_KERNEL(shadow_blocked_dl);
|
|
LOAD_KERNEL(next_iteration_setup);
|
|
LOAD_KERNEL(indirect_subsurface);
|
|
LOAD_KERNEL(buffer_update);
|
|
|
|
#undef LOAD_KERNEL
|
|
|
|
current_max_closure = requested_features.max_closure;
|
|
|
|
return true;
|
|
}
|
|
|
|
size_t DeviceSplitKernel::max_elements_for_max_buffer_size(device_memory& kg, device_memory& data, uint64_t max_buffer_size)
|
|
{
|
|
uint64_t size_per_element = state_buffer_size(kg, data, 1024) / 1024;
|
|
return max_buffer_size / size_per_element;
|
|
}
|
|
|
|
bool DeviceSplitKernel::path_trace(DeviceTask *task,
|
|
RenderTile& tile,
|
|
device_memory& kgbuffer,
|
|
device_memory& kernel_data)
|
|
{
|
|
if(device->have_error()) {
|
|
return false;
|
|
}
|
|
|
|
/* Get local size */
|
|
size_t local_size[2];
|
|
{
|
|
int2 lsize = split_kernel_local_size();
|
|
local_size[0] = lsize[0];
|
|
local_size[1] = lsize[1];
|
|
}
|
|
|
|
/* Set gloabl size */
|
|
size_t global_size[2];
|
|
{
|
|
int2 gsize = split_kernel_global_size(kgbuffer, kernel_data, task);
|
|
|
|
/* Make sure that set work size is a multiple of local
|
|
* work size dimensions.
|
|
*/
|
|
global_size[0] = round_up(gsize[0], local_size[0]);
|
|
global_size[1] = round_up(gsize[1], local_size[1]);
|
|
}
|
|
|
|
/* Number of elements in the global state buffer */
|
|
int num_global_elements = global_size[0] * global_size[1];
|
|
|
|
/* Allocate all required global memory once. */
|
|
if(first_tile) {
|
|
first_tile = false;
|
|
|
|
/* Calculate max groups */
|
|
|
|
/* Denotes the maximum work groups possible w.r.t. current requested tile size. */
|
|
unsigned int max_work_groups = num_global_elements / WORK_POOL_SIZE + 1;
|
|
|
|
/* Allocate work_pool_wgs memory. */
|
|
work_pool_wgs.resize(max_work_groups * sizeof(unsigned int));
|
|
device->mem_alloc("work_pool_wgs", work_pool_wgs, MEM_READ_WRITE);
|
|
|
|
queue_index.resize(NUM_QUEUES * sizeof(int));
|
|
device->mem_alloc("queue_index", queue_index, MEM_READ_WRITE);
|
|
|
|
use_queues_flag.resize(sizeof(char));
|
|
device->mem_alloc("use_queues_flag", use_queues_flag, MEM_READ_WRITE);
|
|
|
|
ray_state.resize(num_global_elements);
|
|
device->mem_alloc("ray_state", ray_state, MEM_READ_WRITE);
|
|
|
|
split_data.resize(state_buffer_size(kgbuffer, kernel_data, num_global_elements));
|
|
device->mem_alloc("split_data", split_data, MEM_READ_WRITE);
|
|
}
|
|
|
|
#define ENQUEUE_SPLIT_KERNEL(name, global_size, local_size) \
|
|
if(device->have_error()) { \
|
|
return false; \
|
|
} \
|
|
if(!kernel_##name->enqueue(KernelDimensions(global_size, local_size), kgbuffer, kernel_data)) { \
|
|
return false; \
|
|
}
|
|
|
|
tile.sample = tile.start_sample;
|
|
|
|
/* for exponential increase between tile updates */
|
|
int time_multiplier = 1;
|
|
|
|
while(tile.sample < tile.start_sample + tile.num_samples) {
|
|
/* to keep track of how long it takes to run a number of samples */
|
|
double start_time = time_dt();
|
|
|
|
/* initial guess to start rolling average */
|
|
const int initial_num_samples = 1;
|
|
/* approx number of samples per second */
|
|
int samples_per_second = (avg_time_per_sample > 0.0) ?
|
|
int(double(time_multiplier) / avg_time_per_sample) + 1 : initial_num_samples;
|
|
|
|
RenderTile subtile = tile;
|
|
subtile.start_sample = tile.sample;
|
|
subtile.num_samples = min(samples_per_second, tile.start_sample + tile.num_samples - tile.sample);
|
|
|
|
if(device->have_error()) {
|
|
return false;
|
|
}
|
|
|
|
/* reset state memory here as global size for data_init
|
|
* kernel might not be large enough to do in kernel
|
|
*/
|
|
device->mem_zero(work_pool_wgs);
|
|
device->mem_zero(split_data);
|
|
|
|
if(!enqueue_split_kernel_data_init(KernelDimensions(global_size, local_size),
|
|
subtile,
|
|
num_global_elements,
|
|
kgbuffer,
|
|
kernel_data,
|
|
split_data,
|
|
ray_state,
|
|
queue_index,
|
|
use_queues_flag,
|
|
work_pool_wgs))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
ENQUEUE_SPLIT_KERNEL(path_init, global_size, local_size);
|
|
|
|
bool activeRaysAvailable = true;
|
|
|
|
while(activeRaysAvailable) {
|
|
/* Do path-iteration in host [Enqueue Path-iteration kernels. */
|
|
for(int PathIter = 0; PathIter < 16; PathIter++) {
|
|
ENQUEUE_SPLIT_KERNEL(scene_intersect, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(lamp_emission, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(do_volume, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(queue_enqueue, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(indirect_background, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(shader_eval, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(holdout_emission_blurring_pathtermination_ao, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(subsurface_scatter, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(direct_lighting, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(shadow_blocked_ao, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(shadow_blocked_dl, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(next_iteration_setup, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(indirect_subsurface, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(queue_enqueue, global_size, local_size);
|
|
ENQUEUE_SPLIT_KERNEL(buffer_update, global_size, local_size);
|
|
|
|
if(task->get_cancel()) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/* Decide if we should exit path-iteration in host. */
|
|
device->mem_copy_from(ray_state, 0, global_size[0] * global_size[1] * sizeof(char), 1, 1);
|
|
|
|
activeRaysAvailable = false;
|
|
|
|
for(int rayStateIter = 0; rayStateIter < global_size[0] * global_size[1]; ++rayStateIter) {
|
|
if(int8_t(ray_state.get_data()[rayStateIter]) != RAY_INACTIVE) {
|
|
/* Not all rays are RAY_INACTIVE. */
|
|
activeRaysAvailable = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(task->get_cancel()) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
double time_per_sample = ((time_dt()-start_time) / subtile.num_samples);
|
|
|
|
if(avg_time_per_sample == 0.0) {
|
|
/* start rolling average */
|
|
avg_time_per_sample = time_per_sample;
|
|
}
|
|
else {
|
|
avg_time_per_sample = alpha*time_per_sample + (1.0-alpha)*avg_time_per_sample;
|
|
}
|
|
|
|
#undef ENQUEUE_SPLIT_KERNEL
|
|
|
|
tile.sample += subtile.num_samples;
|
|
task->update_progress(&tile, tile.w*tile.h*subtile.num_samples);
|
|
|
|
time_multiplier = min(time_multiplier << 1, 10);
|
|
|
|
if(task->get_cancel()) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|
|
|
|
|