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Shader Execution Reordering #87

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Merged
tobre1 merged 2 commits into from
Nov 30, 2025
Merged

Shader Execution Reordering #87

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6e87f1e
Shader Execution Reordering
Xaver-01 Nov 30, 2025
2f46692
fix sbt pointer type
Xaver-01 Nov 30, 2025
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38 changes: 25 additions & 13 deletions gpu/pipelines/GeneralPipelineDisk.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -172,21 +172,33 @@ extern "C" __global__ void __raygen__() {
// the values we store the PRD pointer in:
uint32_t u0, u1;
packPointer((void *)&prd, u0, u1);
unsigned int hintBitLength = 2;

while (continueRay(launchParams, prd)) {
optixTrace(launchParams.traversable, // traversable GAS
make_float3(prd.pos[0], prd.pos[1], prd.pos[2]), // origin
make_float3(prd.dir[0], prd.dir[1], prd.dir[2]), // direction
1e-4f, // tmin
1e20f, // tmax
0.0f, // rayTime
OptixVisibilityMask(255),
OPTIX_RAY_FLAG_DISABLE_ANYHIT, // OPTIX_RAY_FLAG_NONE,
0, // SBT offset
1, // SBT stride
0, // missSBTIndex
u0, u1); // Payload
prd.totalCount = 0; // Reset PerRayData
optixTraverse(launchParams.traversable, // traversable GAS
make_float3(prd.pos[0], prd.pos[1], prd.pos[2]), // origin
make_float3(prd.dir[0], prd.dir[1], prd.dir[2]), // direction
1e-4f, // tmin
1e20f, // tmax
0.0f, // rayTime
OptixVisibilityMask(255),
OPTIX_RAY_FLAG_DISABLE_ANYHIT, // OPTIX_RAY_FLAG_NONE,
0, // SBT offset
1, // SBT stride
0, // missSBTIndex
u0, u1); // Payload
unsigned int hint = 0;
if (prd.rayWeight < launchParams.rayWeightThreshold || prd.energy < 0.f) {
hint |= (1 << 0);
}
if (optixHitObjectIsHit()) {
const HitSBTDataDisk *hitData = reinterpret_cast<const HitSBTDataDisk *>(
optixHitObjectGetSbtDataPointer());
hint |= hitData->base.isBoundary << 1;
}
optixReorder(hint, hintBitLength);
optixInvoke(u0, u1);
prd.totalCount = 0; // Reset PerRayData
prd.numReflections++;
}
}
38 changes: 25 additions & 13 deletions gpu/pipelines/GeneralPipelineLine.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -114,21 +114,33 @@ extern "C" __global__ void __raygen__() {
// the values we store the PRD pointer in:
uint32_t u0, u1;
packPointer((void *)&prd, u0, u1);
unsigned int hintBitLength = 2;

while (continueRay(launchParams, prd)) {
optixTrace(launchParams.traversable, // traversable GAS
make_float3(prd.pos[0], prd.pos[1], prd.pos[2]), // origin
make_float3(prd.dir[0], prd.dir[1], prd.dir[2]), // direction
1e-4f, // tmin
1e20f, // tmax
0.0f, // rayTime
OptixVisibilityMask(255),
OPTIX_RAY_FLAG_DISABLE_ANYHIT, // OPTIX_RAY_FLAG_NONE,
0, // SBT offset
1, // SBT stride
0, // missSBTIndex
u0, u1); // Payload
prd.totalCount = 0; // Reset PerRayData
optixTraverse(launchParams.traversable, // traversable GAS
make_float3(prd.pos[0], prd.pos[1], prd.pos[2]), // origin
make_float3(prd.dir[0], prd.dir[1], prd.dir[2]), // direction
1e-4f, // tmin
1e20f, // tmax
0.0f, // rayTime
OptixVisibilityMask(255),
OPTIX_RAY_FLAG_DISABLE_ANYHIT, // OPTIX_RAY_FLAG_NONE,
0, // SBT offset
1, // SBT stride
0, // missSBTIndex
u0, u1); // Payload
unsigned int hint = 0;
if (prd.rayWeight < launchParams.rayWeightThreshold || prd.energy < 0.f) {
hint |= (1 << 0);
}
if (optixHitObjectIsHit()) {
const HitSBTDataLine *hitData = reinterpret_cast<const HitSBTDataLine *>(
optixHitObjectGetSbtDataPointer());
hint |= hitData->base.isBoundary << 1;
}
optixReorder(hint, hintBitLength);
optixInvoke(u0, u1);
prd.totalCount = 0; // Reset PerRayData
prd.numReflections++;
}
}
36 changes: 24 additions & 12 deletions gpu/pipelines/GeneralPipelineTriangle.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -84,20 +84,32 @@ extern "C" __global__ void __raygen__() {
// the values we store the PRD pointer in:
uint32_t u0, u1;
packPointer((void *)&prd, u0, u1);
unsigned int hintBitLength = 2;

while (continueRay(launchParams, prd)) {
optixTrace(launchParams.traversable, // traversable GAS
make_float3(prd.pos[0], prd.pos[1], prd.pos[2]), // origin
make_float3(prd.dir[0], prd.dir[1], prd.dir[2]), // direction
1e-4f, // tmin
1e20f, // tmax
0.0f, // rayTime
OptixVisibilityMask(255),
OPTIX_RAY_FLAG_DISABLE_ANYHIT, // OPTIX_RAY_FLAG_NONE,
0, // SBT offset
1, // SBT stride
0, // missSBTIndex
u0, u1); // Payload
optixTraverse(launchParams.traversable, // traversable GAS
make_float3(prd.pos[0], prd.pos[1], prd.pos[2]), // origin
make_float3(prd.dir[0], prd.dir[1], prd.dir[2]), // direction
1e-4f, // tmin
1e20f, // tmax
0.0f, // rayTime
OptixVisibilityMask(255),
OPTIX_RAY_FLAG_DISABLE_ANYHIT, // OPTIX_RAY_FLAG_NONE,
0, // SBT offset
1, // SBT stride
0, // missSBTIndex
u0, u1); // Payload
unsigned int hint = 0;
if (prd.rayWeight < launchParams.rayWeightThreshold || prd.energy < 0.f) {
hint |= (1 << 0);
}
if (optixHitObjectIsHit()) {
const HitSBTDataTriangle *hitData = reinterpret_cast<const HitSBTDataTriangle *>(
optixHitObjectGetSbtDataPointer());
hint |= hitData->base.isBoundary << 1;
}
optixReorder(hint, hintBitLength);
optixInvoke(u0, u1);
prd.numReflections++;
#ifdef COUNT_RAYS
int *counter = reinterpret_cast<int *>(launchParams.customData);
Expand Down