File size: 2,684 Bytes
8efb28e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | #include "models.h"
ggml_cgraph * clip_graph_internvl::build() {
GGML_ASSERT(model.class_embedding != nullptr);
GGML_ASSERT(model.position_embeddings != nullptr);
const int n_pos = n_patches + 1;
ggml_tensor * inp = build_inp();
// add CLS token
ggml_tensor * cls_repeated = ggml_repeat_4d(ctx0, model.class_embedding,
model.class_embedding->ne[0], 1, n_batch, 1);
inp = ggml_concat(ctx0, inp, cls_repeated, 1);
// The larger models use a different ViT, which uses RMS norm instead of layer norm
// ref: https://github.com/ggml-org/llama.cpp/pull/13443#issuecomment-2869786188
norm_type norm_t = (hparams.n_embd == 3200 && hparams.n_layer == 45)
? NORM_TYPE_RMS // 6B ViT (Used by InternVL 2.5/3 - 26B, 38B, 78B)
: NORM_TYPE_NORMAL; // 300M ViT (Used by all smaller InternVL models)
ggml_tensor * cur = build_vit(
inp, n_pos,
norm_t,
hparams.ffn_op,
model.position_embeddings,
nullptr);
// remove CLS token
cur = ggml_view_3d(ctx0, cur,
n_embd, n_patches, n_batch,
cur->nb[1], cur->nb[2], 0);
cur = ggml_cont(ctx0, cur);
// pixel shuffle
{
const int scale_factor = model.hparams.n_merge;
const int bsz = n_batch;
const int height = n_patches_y;
const int width = n_patches_x;
GGML_ASSERT(scale_factor > 0);
cur = ggml_reshape_4d(ctx0, cur, n_embd * scale_factor, height / scale_factor, width, bsz);
cur = ggml_permute(ctx0, cur, 0, 2, 1, 3);
cur = ggml_cont_4d(ctx0, cur,
n_embd * scale_factor * scale_factor,
height / scale_factor,
width / scale_factor,
bsz);
cur = ggml_permute(ctx0, cur, 0, 2, 1, 3);
// flatten to 2D
cur = ggml_cont_3d(ctx0, cur,
n_embd * scale_factor * scale_factor,
cur->ne[1] * cur->ne[2],
cur->ne[3]);
}
// projector (always using GELU activation)
{
// projector LayerNorm uses pytorch's default eps = 1e-5
// ref: https://huggingface.co/OpenGVLab/InternVL3-8B-Instruct/blob/a34d3e4e129a5856abfd6aa6de79776484caa14e/modeling_internvl_chat.py#L79
cur = build_norm(cur, model.mm_0_w, model.mm_0_b, NORM_TYPE_NORMAL, 1e-5, -1);
cur = build_ffn(cur,
model.mm_1_w, model.mm_1_b,
nullptr, nullptr,
model.mm_3_w, model.mm_3_b,
FFN_GELU,
-1);
}
// build the graph
ggml_build_forward_expand(gf, cur);
return gf;
}
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