84ad20acef
This commit re-shuffles code in split kernel once again and makes it so common parts which is in the headers is only responsible to making all the work needed for specified ray index. Getting ray index, checking for it's validity and enqueuing tasks are now happening in the device specified part of the kernel. This actually makes sense because enqueuing is indeed device-specified and i.e. with CUDA we'll want to enqueue kernels from kernel and avoid CPU roundtrip. TODO: - Kernel comments are still placed in the common header files, but since queue related stuff is not passed to those functions those comments might need to be split as well. Just currently read them considering that they're also covering the way how all devices are invoking the common code path. - Arguments might need to be wrapped into KernelGlobals, so we don't ened to pass all them around as function arguments.
116 lines
5.2 KiB
Common Lisp
116 lines
5.2 KiB
Common Lisp
/*
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* Copyright 2011-2015 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "split/kernel_next_iteration_setup.h"
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__kernel void kernel_ocl_path_trace_next_iteration_setup(
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ccl_global char *globals,
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ccl_constant KernelData *data,
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ccl_global char *shader_data, /* Required for setting up ray for next iteration */
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ccl_global uint *rng_coop, /* Required for setting up ray for next iteration */
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ccl_global float3 *throughput_coop, /* Required for setting up ray for next iteration */
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PathRadiance *PathRadiance_coop, /* Required for setting up ray for next iteration */
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ccl_global Ray *Ray_coop, /* Required for setting up ray for next iteration */
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ccl_global PathState *PathState_coop, /* Required for setting up ray for next iteration */
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ccl_global Ray *LightRay_dl_coop, /* Required for radiance update - direct lighting */
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ccl_global int *ISLamp_coop, /* Required for radiance update - direct lighting */
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ccl_global BsdfEval *BSDFEval_coop, /* Required for radiance update - direct lighting */
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ccl_global Ray *LightRay_ao_coop, /* Required for radiance update - AO */
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ccl_global float3 *AOBSDF_coop, /* Required for radiance update - AO */
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ccl_global float3 *AOAlpha_coop, /* Required for radiance update - AO */
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ccl_global char *ray_state, /* Denotes the state of each ray */
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ccl_global int *Queue_data, /* Queue memory */
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ccl_global int *Queue_index, /* Tracks the number of elements in each queue */
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int queuesize, /* Size (capacity) of each queue */
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ccl_global char *use_queues_flag) /* flag to decide if scene_intersect kernel should
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* use queues to fetch ray index */
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{
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ccl_local unsigned int local_queue_atomics;
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if(get_local_id(0) == 0 && get_local_id(1) == 0) {
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local_queue_atomics = 0;
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}
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barrier(CLK_LOCAL_MEM_FENCE);
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if(get_global_id(0) == 0 && get_global_id(1) == 0) {
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/* If we are here, then it means that scene-intersect kernel
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* has already been executed atleast once. From the next time,
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* scene-intersect kernel may operate on queues to fetch ray index
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*/
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use_queues_flag[0] = 1;
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/* Mark queue indices of QUEUE_SHADOW_RAY_CAST_AO_RAYS and
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* QUEUE_SHADOW_RAY_CAST_DL_RAYS queues that were made empty during the
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* previous kernel.
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*/
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Queue_index[QUEUE_SHADOW_RAY_CAST_AO_RAYS] = 0;
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Queue_index[QUEUE_SHADOW_RAY_CAST_DL_RAYS] = 0;
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}
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char enqueue_flag = 0;
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int ray_index = get_global_id(1) * get_global_size(0) + get_global_id(0);
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ray_index = get_ray_index(ray_index,
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QUEUE_ACTIVE_AND_REGENERATED_RAYS,
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Queue_data,
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queuesize,
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0);
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#ifdef __COMPUTE_DEVICE_GPU__
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/* If we are executing on a GPU device, we exit all threads that are not
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* required.
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*
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* If we are executing on a CPU device, then we need to keep all threads
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* active since we have barrier() calls later in the kernel. CPU devices,
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* expect all threads to execute barrier statement.
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*/
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if(ray_index == QUEUE_EMPTY_SLOT) {
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return;
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}
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#endif
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#ifndef __COMPUTE_DEVICE_GPU__
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if(ray_index != QUEUE_EMPTY_SLOT) {
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#endif
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enqueue_flag = kernel_next_iteration_setup(globals,
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data,
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shader_data,
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rng_coop,
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throughput_coop,
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PathRadiance_coop,
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Ray_coop,
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PathState_coop,
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LightRay_dl_coop,
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ISLamp_coop,
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BSDFEval_coop,
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LightRay_ao_coop,
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AOBSDF_coop,
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AOAlpha_coop,
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ray_state,
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use_queues_flag,
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ray_index);
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#ifndef __COMPUTE_DEVICE_GPU__
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}
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#endif
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/* Enqueue RAY_UPDATE_BUFFER rays. */
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enqueue_ray_index_local(ray_index,
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QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS,
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enqueue_flag,
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queuesize,
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&local_queue_atomics,
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Queue_data,
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Queue_index);
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}
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