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added comment explaining group norm behavior in ggml.h #813

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added comment explaining group norm behavior in ggml.h #813

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4 changes: 4 additions & 0 deletions include/ggml/ggml.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1136,6 +1136,10 @@ extern "C" {

// group normalize along ne0*ne1*n_groups
// used in stable-diffusion
// calculated over first 2 dimensions
// To get normalization on first dimension only (pytorch default behavior),
// you can move the second dimension of tensor a to the third.
// https://github.com/ggerganov/ggml/issues/803
// TODO: eps is hardcoded to 1e-6 for now
GGML_API struct ggml_tensor * ggml_group_norm(
struct ggml_context * ctx,
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