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model : make falcon-h1 use shared mamba2 layer builder

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Francis Couture-Harpin
2025-07-09 09:44:37 -04:00
parent a60a24beed
commit 7f3955a068
1 changed files with 13 additions and 142 deletions
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155
src/llama-model.cpp
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@@ -5021,7 +5021,10 @@ void llama_model::print_info() const {
}
}
if (arch == LLM_ARCH_MAMBA || arch == LLM_ARCH_MAMBA2 || arch == LLM_ARCH_JAMBA) {
if (arch == LLM_ARCH_MAMBA ||
arch == LLM_ARCH_MAMBA2 ||
arch == LLM_ARCH_JAMBA ||
arch == LLM_ARCH_FALCON_H1) {
LLAMA_LOG_INFO("%s: ssm_d_conv = %u\n", __func__, hparams.ssm_d_conv);
LLAMA_LOG_INFO("%s: ssm_d_inner = %u\n", __func__, hparams.ssm_d_inner);
LLAMA_LOG_INFO("%s: ssm_d_state = %u\n", __func__, hparams.ssm_d_state);
@@ -10292,8 +10295,11 @@ struct llm_graph_context_mamba : public llm_graph_context {
y = ggml_swiglu_split(ctx0, ggml_cont(ctx0, z), y);
// grouped RMS norm
y = ggml_reshape_4d(ctx0, y, d_inner / n_group, n_group, n_seq_tokens, n_seqs);
y = build_norm(y, model.layers[il].ssm_norm, NULL, LLM_NORM_RMS, il);
if (model.layers[il].ssm_norm) {
y = ggml_reshape_4d(ctx0, y, d_inner / n_group, n_group, n_seq_tokens, n_seqs);
y = build_norm(y, model.layers[il].ssm_norm, NULL, LLM_NORM_RMS, il);
}
y = ggml_reshape_3d(ctx0, y, d_inner, n_seq_tokens, n_seqs);
// {d_inner, n_embd} @ {d_inner, n_seq_tokens, n_seqs} => {n_embd, n_seq_tokens, n_seqs}
@@ -14919,10 +14925,8 @@ struct llm_build_ernie4_5 : public llm_graph_context {
}
};
struct llm_build_falcon_h1 : public llm_graph_context {
const llama_model & model;
llm_build_falcon_h1(const llama_model & model, const llm_graph_params & params, ggml_cgraph * gf) : llm_graph_context(params), model(model) {
struct llm_build_falcon_h1 : public llm_graph_context_mamba {
llm_build_falcon_h1(const llama_model & model, const llm_graph_params & params, ggml_cgraph * gf) : llm_graph_context_mamba(params) {
const int64_t n_embd_head = hparams.n_embd_head_v;
ggml_tensor * cur;
@@ -14978,7 +14982,7 @@ struct llm_build_falcon_h1 : public llm_graph_context {
cb(Kcur, "Kcur-post-rope", il);
cb(Vcur, "Vcur-post-rope", il);
ggml_tensor * attn_out = build_attn(inp, gf,
ggml_tensor * attn_out = build_attn(inp->get_attn(), gf,
model.layers[il].wo, NULL,
Qcur, Kcur, Vcur, nullptr, nullptr, kq_scale, il);
cb(attn_out, "attn_out", il);
@@ -14989,7 +14993,7 @@ struct llm_build_falcon_h1 : public llm_graph_context {
// Mamba2 layer
cb(cur, "ssm_in", il);
ggml_tensor * ssm_out = build_mamba2_layer(inp, gf, cur, ubatch, il);
ggml_tensor * ssm_out = build_mamba2_layer(inp->get_recr(), gf, cur, model, ubatch, il);
cb(ssm_out, "ssm_out", il);
// // Aggregation
@@ -15045,139 +15049,6 @@ struct llm_build_falcon_h1 : public llm_graph_context {
ggml_build_forward_expand(gf, cur);
}
ggml_tensor * build_mamba2_layer(
llm_graph_input_mem_hybrid * inp,
ggml_cgraph * gf,
ggml_tensor * cur,
const llama_ubatch & ubatch,
int il) const {
const auto * kv_state = static_cast<const llama_memory_hybrid_context *>(mctx)->get_recr();
const auto kv_head = kv_state->get_head();
const int64_t d_conv = hparams.ssm_d_conv;
const int64_t d_inner = hparams.ssm_d_inner;
const int64_t d_state = hparams.ssm_d_state;
const int64_t n_head = hparams.ssm_dt_rank;
const int64_t head_dim = d_inner / n_head;
const int64_t n_group = hparams.ssm_n_group;
const int64_t n_seqs = ubatch.n_seqs;
const int64_t n_seq_tokens = ubatch.n_seq_tokens;
GGML_ASSERT(n_seqs != 0);
GGML_ASSERT(ubatch.equal_seqs);
GGML_ASSERT(ubatch.n_tokens == n_seq_tokens * n_seqs);
ggml_tensor * conv_states_all = kv_state->get_r_l(il);
ggml_tensor * ssm_states_all = kv_state->get_s_l(il);
ggml_tensor * conv = build_rs(inp, gf, conv_states_all, hparams.n_embd_r(), n_seqs);
conv = ggml_reshape_3d(ctx0, conv, d_conv - 1, d_inner + 2*n_group*d_state, n_seqs);
// {n_embd, n_tokens} => {n_embd, n_seq_tokens, n_seqs}
cur = ggml_reshape_3d(ctx0, cur, cur->ne[0], n_seq_tokens, n_seqs);
// d_in_proj = 2 * self.d_inner + 2 * self.ngroups * self.d_state + self.nheads
// {n_embd, d_in_proj} @ {n_embd, n_seq_tokens, n_seqs} => {d_in_proj, n_seq_tokens, n_seqs}
ggml_tensor * zxBCdt = build_lora_mm(model.layers[il].ssm_in, cur);
cb(zxBCdt, "zxBCdt", il);
// split the above in three
ggml_tensor * z = ggml_view_4d(ctx0, zxBCdt, head_dim, n_head, n_seq_tokens, n_seqs, head_dim*zxBCdt->nb[0], zxBCdt->nb[1], zxBCdt->nb[2], 0);
ggml_tensor * xBC = ggml_view_3d(ctx0, zxBCdt, d_inner + 2*n_group*d_state, n_seq_tokens, n_seqs, zxBCdt->nb[1], zxBCdt->nb[2], d_inner*ggml_element_size(zxBCdt));
ggml_tensor * dt = ggml_view_3d(ctx0, zxBCdt, n_head, n_seq_tokens, n_seqs, zxBCdt->nb[1], zxBCdt->nb[2], (2*d_inner + 2*n_group*d_state)*ggml_element_size(zxBCdt));
// conv
{
// => {d_conv - 1 + n_seq_tokens, d_inner + 2*n_group*d_state, n_seqs}
ggml_tensor * conv_x = ggml_concat(ctx0, conv, ggml_transpose(ctx0, xBC), 0);
// copy last (d_conv - 1) columns back into the state cache
ggml_tensor * last_conv = ggml_view_3d(ctx0, conv_x, d_conv - 1, d_inner + 2*n_group*d_state, n_seqs, conv_x->nb[1], conv_x->nb[2], n_seq_tokens*(conv_x->nb[0]));
ggml_build_forward_expand(gf,
ggml_cpy(ctx0, last_conv,
ggml_view_1d(ctx0, conv_states_all,
(d_conv - 1)*(d_inner + 2*n_group*d_state)*(n_seqs),
kv_head*(d_conv - 1)*(d_inner + 2*n_group*d_state)*ggml_element_size(conv_states_all))));
// 1D convolution
// The equivalent is to make a self-overlapping view of conv_x
// over d_conv columns at each stride in the 3rd dimension,
// then element-wise multiply that with the conv1d weight,
// then sum the elements of each row,
// (the last two steps are a dot product over rows (also doable with mul_mat))
// then permute away the ne[0] dimension,
// and then you're left with the resulting x tensor.
// For simultaneous sequences, all sequences need to have the same length.
xBC = ggml_ssm_conv(ctx0, conv_x, model.layers[il].ssm_conv1d);
// bias
xBC = ggml_add(ctx0, xBC, model.layers[il].ssm_conv1d_b);
xBC = ggml_silu(ctx0, xBC);
}
// ssm
{
// These correspond to V K Q in SSM/attention duality
ggml_tensor * x = ggml_view_4d(ctx0, xBC, head_dim, n_head, n_seq_tokens, n_seqs, head_dim*xBC->nb[0], xBC->nb[1], xBC->nb[2], 0);
ggml_tensor * B = ggml_view_4d(ctx0, xBC, d_state, n_group, n_seq_tokens, n_seqs, d_state*xBC->nb[0], xBC->nb[1], xBC->nb[2], d_inner*ggml_element_size(xBC));
ggml_tensor * C = ggml_view_4d(ctx0, xBC, d_state, n_group, n_seq_tokens, n_seqs, d_state*xBC->nb[0], xBC->nb[1], xBC->nb[2], (d_inner + n_group*d_state)*ggml_element_size(xBC));
// {n_head, n_seq_tokens, n_seqs}
dt = ggml_add(ctx0, ggml_cont(ctx0, dt), model.layers[il].ssm_dt_b);
ggml_tensor * A = model.layers[il].ssm_a;
// use the states and the indices provided by build_rs
// (this is necessary in order to properly use the states before they are overwritten,
// while avoiding to make unnecessary copies of the states)
auto get_ssm_rows = [&](ggml_context * ctx, ggml_tensor * states, ggml_tensor * ids) {
ggml_tensor * ssm = ggml_reshape_4d(ctx, states, d_state, head_dim, n_head, kv_state->get_size());
// TODO: use semistructured matrices to implement state-space duality
// => {d_inner, n_seq_tokens, n_seqs} and {d_state, d_inner, n_seqs}
return ggml_ssm_scan(ctx, ssm, x, dt, A, B, C, ids);
};
ggml_tensor * y_ssm = build_rs(inp, gf, ssm_states_all, hparams.n_embd_s(), ubatch.n_seqs, get_ssm_rows);
// store last states
ggml_build_forward_expand(gf,
ggml_cpy(ctx0,
ggml_view_1d(ctx0, y_ssm, d_state*d_inner*n_seqs, ggml_nelements(x)*x->nb[0]),
ggml_view_1d(ctx0, ssm_states_all, d_state*d_inner*n_seqs, kv_head*d_state*d_inner*ggml_element_size(ssm_states_all))));
ggml_tensor * y = ggml_view_4d(ctx0, y_ssm, head_dim, n_head, n_seq_tokens, n_seqs, x->nb[1], n_head*x->nb[1], n_seq_tokens*n_head*x->nb[1], 0);
// TODO: skip computing output earlier for unused tokens
y = ggml_add(ctx0, y, ggml_mul(ctx0, x, model.layers[il].ssm_d));
y = ggml_swiglu_split(ctx0, ggml_cont(ctx0, z), y);
// grouped RMS norm
if (model.layers[il].ssm_norm) {
y = ggml_reshape_4d(ctx0, y, d_inner / n_group, n_group, n_seq_tokens, n_seqs);
y = build_norm(y, model.layers[il].ssm_norm, NULL, LLM_NORM_RMS, il);
}
y = ggml_reshape_3d(ctx0, y, d_inner, n_seq_tokens, n_seqs);
// {d_inner, n_embd} @ {d_inner, n_seq_tokens, n_seqs} => {n_embd, n_seq_tokens, n_seqs}
cur = build_lora_mm(model.layers[il].ssm_out, y);
}
// {n_embd, n_seq_tokens, n_seqs} => {n_embd, n_tokens}
cur = ggml_reshape_2d(ctx0, cur, cur->ne[0], n_seq_tokens * n_seqs);
cb(cur, "mamba_out", il);
return cur;
}
};
struct llm_build_arcee : public llm_graph_context {