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Put the job index on grid.x in the sampled template fit #10

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Merged
zerozole merged 1 commit into from
Sep 20, 2026
Merged

Put the job index on grid.x in the sampled template fit #10

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9 changes: 6 additions & 3 deletions periodfind/cuda/tfs.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -262,8 +262,11 @@ __global__ void ScoreKernel(const double* __restrict__ fc,
size_t n_band,
size_t n_phase,
double* __restrict__ best) {
const size_t k = blockIdx.x; // template
const size_t job = blockIdx.y;
// job on x and template on y, not the other way round: gridDim.y is
// capped at 65,535 and the job count is curves times candidate periods,
// which passes that at a few hundred curves. gridDim.x allows 2^31-1.
const size_t job = blockIdx.x;
const size_t k = blockIdx.y; // template
const int tid = threadIdx.x;

extern __shared__ double sh[];
Expand Down Expand Up @@ -573,7 +576,7 @@ void TemplateFitSampled::CalcTFSBatched(const std::vector<double*>& times,
gpuErrchk(cudaPeekAtLastError());

const size_t sh_score = 5 * n_phase_ * sizeof(double);
dim3 grid((unsigned int)n_template_, (unsigned int)n_job);
dim3 grid((unsigned int)n_job, (unsigned int)n_template_);
ScoreKernel<<<grid, TFS_THREADS, sh_score>>>(d_fc, d_fs, d_stat, d_tss,
dev_fs_, dev_fs2_, n_template_,
n_band_, n_phase_, d_best);
Expand Down
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