ikawrakow/ik_llama.cpp
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Revert "Simplify delta-net (#1335)"

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This reverts commit e5fc30244c.
This commit is contained in:
Kawrakow
2026-02-28 12:09:02 +00:00
parent e5fc30244c
commit 18b1b23ed5
8 changed files with 362 additions and 8 deletions
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1
src/llama-cparams.h
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@@ -43,6 +43,7 @@ struct llama_cparams {
bool split_mode_graph_scheduling;
//bool split_mode_f16;
bool scheduler_async;
int fused_delta_net;
int min_experts;
float thresh_experts;
bool mtp;

314
src/llama-delta-net.cpp
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@@ -74,6 +74,304 @@ delta_net::delta_net(llama_context & _lctx, const llama_batch & _batch) : lctx(_
delta_net::~delta_net() = default;
std::pair<ggml_tensor *, ggml_tensor *> delta_net::build_delta_net_chunking(ggml_context * ctx0,
ggml_tensor * q, ggml_tensor * k, ggml_tensor * v,
ggml_tensor * g, ggml_tensor * beta, ggml_tensor * state,
ggml_tensor * causal_mask, ggml_tensor * identity,
ggml_tensor * diag_mask, int il, const llm_build_cb & cb) {
const int64_t S_k = q->ne[0];
const int64_t H_k = q->ne[1];
const int64_t n_tokens = q->ne[2];
const int64_t n_seqs = q->ne[3];
const int64_t S_v = v->ne[0];
const int64_t H_v = v->ne[1];
GGML_ASSERT(n_seqs == 1);
GGML_ASSERT(v->ne[2] == n_tokens);
GGML_ASSERT(k->ne[2] == n_tokens);
GGML_ASSERT(g->ne[0] == H_v && g->ne[1] == n_tokens && g->ne[2] == n_seqs);
if (beta->ne[0] != H_v || beta->ne[2] != n_tokens || beta->ne[3] != n_seqs) {
printf("beta: %ld x %ld x %ld, expected %ld x %ld x %ld\n", beta->ne[0], beta->ne[2], beta->ne[3], H_v, n_tokens, n_seqs);
}
GGML_ASSERT(beta->ne[0] == H_v && beta->ne[2] == n_tokens && beta->ne[3] == n_seqs);
GGML_ASSERT(state->ne[0] == S_v && state->ne[1] == S_v && state->ne[2] == H_v && state->ne[3] == n_seqs);
GGML_ASSERT(H_k == H_v);
const float scale = 1.0f / sqrtf(S_v);
q = ggml_scale(ctx0, q, scale);
beta = ggml_sigmoid(ctx0, beta);
cb(q, "q_in", il);
cb(k, "k_in", il);
cb(v, "v_in", il);
cb(beta, "beta_in", il);
cb(g, "g_in", il);
cb(state,"state_in", il);
const int64_t chunk_size = DELTA_CHUNK_SIZE;
const int64_t pad = (chunk_size - n_tokens % chunk_size) % chunk_size;
const int64_t n_chunks = (n_tokens + pad) / chunk_size;
q = ggml_permute(ctx0, q, 0, 2, 1, 3);
k = ggml_permute(ctx0, k, 0, 2, 1, 3);
v = ggml_permute(ctx0, v, 0, 2, 1, 3);
g = ggml_permute(ctx0, g, 2, 0, 3, 1);
beta = ggml_permute(ctx0, beta, 2, 0, 1, 3);
q = ggml_pad(ctx0, q, 0, pad, 0, 0);
k = ggml_pad(ctx0, k, 0, pad, 0, 0);
v = ggml_pad(ctx0, v, 0, pad, 0, 0);
beta = ggml_pad(ctx0, beta, 0, pad, 0, 0);
g = ggml_pad(ctx0, g, pad, 0, 0, 0);
cb(q, "q_pad", il);
cb(k, "k_pad", il);
cb(v, "v_pad", il);
cb(beta, "beta_pad", il);
cb(g, "g_pad", il);
ggml_tensor * v_beta = ggml_mul(ctx0, v, beta);
ggml_tensor * k_beta = ggml_mul(ctx0, k, beta);
cb(v_beta, "v_beta", il);
cb(k_beta, "k_beta", il);
q = ggml_reshape_4d(ctx0, q, S_k, chunk_size, n_chunks, H_k * n_seqs);
k = ggml_reshape_4d(ctx0, k, S_k, chunk_size, n_chunks, H_k * n_seqs);
k_beta = ggml_reshape_4d(ctx0, k_beta, S_k, chunk_size, n_chunks, H_v * n_seqs);
v = ggml_reshape_4d(ctx0, v, S_v, chunk_size, n_chunks, H_v * n_seqs);
v_beta = ggml_reshape_4d(ctx0, v_beta, S_v, chunk_size, n_chunks, H_v * n_seqs);
g = ggml_reshape_4d(ctx0, g, chunk_size, 1, n_chunks, H_v * n_seqs);
beta = ggml_reshape_4d(ctx0, beta, 1, chunk_size, n_chunks, H_v * n_seqs);
ggml_tensor * g_cumsum = ggml_cumsum(ctx0, g);
cb(g_cumsum, "g_cumsum", il);
ggml_tensor * gcs_i =
ggml_repeat_4d(ctx0, g_cumsum, chunk_size, chunk_size, n_chunks, H_v * n_seqs);
ggml_tensor * gcs_j = ggml_reshape_4d(ctx0, g_cumsum, 1, chunk_size, n_chunks, H_v * n_seqs);
ggml_tensor * gcs_j_broadcast =
ggml_repeat_4d(ctx0, gcs_j, chunk_size, chunk_size, n_chunks, H_v * n_seqs);
ggml_tensor * decay_mask = ggml_sub(ctx0, gcs_j_broadcast, gcs_i);
cb(decay_mask, "decay_mask", il);
decay_mask = ggml_mul(ctx0, decay_mask, diag_mask);
cb(decay_mask, "decay_mask_1", il);
decay_mask = ggml_exp(ctx0, decay_mask);
cb(decay_mask, "decay_mask_exp", il);
decay_mask = ggml_mul(ctx0, decay_mask, diag_mask);
cb(decay_mask, "decay_mask_2", il);
ggml_tensor * kmulkbeta = ggml_mul_mat(ctx0, k, k_beta);
cb(kmulkbeta, "kk_beta", il);
ggml_tensor * k_decay = ggml_mul(ctx0, kmulkbeta, decay_mask);
cb(k_decay, "k_decay_1", il);
k_decay = ggml_mul(ctx0, k_decay, causal_mask);
cb(k_decay, "k_decay_2", il);
ggml_tensor * attn = ggml_neg(ctx0, k_decay);
cb(attn, "attn_pre_solve", il);
ggml_tensor * attn_lower = ggml_mul(ctx0, attn, causal_mask);
cb(attn_lower, "attn_lower", il);
ggml_tensor * identity_repeat =
ggml_repeat_4d(ctx0, identity, attn_lower->ne[0], attn_lower->ne[1], attn_lower->ne[2], attn_lower->ne[3]);
ggml_tensor * lhs = ggml_neg(ctx0, ggml_sub(ctx0, attn_lower, identity_repeat));
ggml_tensor * lin_solve = ggml_solve_tri(ctx0, lhs, attn, true, true, false);
attn = ggml_mul(ctx0, lin_solve, causal_mask);
cb(attn, "attn_mul", il);
attn = ggml_add(ctx0, attn, identity);
cb(attn, "attn_solved", il);
auto v_beta_t = ggml_cont(ctx0, ggml_transpose(ctx0, v_beta));
cb(v_beta_t, "v_beta_t", il);
v = ggml_mul_mat(ctx0, v_beta_t, attn);
cb(v, "v_beta", il);
ggml_tensor * g_cumsum_t = ggml_cont(ctx0, ggml_transpose(ctx0, g_cumsum));
cb(g_cumsum_t, "g_cumsum_t", il);
ggml_tensor * gexp = ggml_exp(ctx0, g_cumsum_t);
cb(gexp, "gexp", il);
ggml_tensor * kbeta_gexp = ggml_mul(ctx0, k_beta, gexp);
cb(kbeta_gexp, "kbeta_gexp", il);
auto kbeta_gexp_t = ggml_cont(ctx0, ggml_transpose(ctx0, kbeta_gexp));
cb(kbeta_gexp_t, "kbeta_gexp_t", il);
auto attn_kbeta = ggml_mul_mat(ctx0, attn, kbeta_gexp_t);
cb(attn_kbeta, "attn_kbeta", il);
ggml_tensor * k_cumdecay = ggml_cont(ctx0, ggml_transpose(ctx0, attn_kbeta));
cb(k_cumdecay, "k_cumdecay", il);
ggml_tensor * attn_kq = ggml_mul_mat(ctx0, k, q);
cb(attn_kq, "attn_kq_pre", il);
attn_kq = ggml_mul(ctx0, decay_mask, attn_kq);
cb(attn_kq, "attn_kq_0", il);
attn_kq = ggml_mul(ctx0, attn_kq, diag_mask);
cb(attn_kq, "attn_kq", il);
ggml_tensor * g_last = ggml_view_4d(ctx0, g_cumsum, 1, 1, g_cumsum->ne[2], g_cumsum->ne[3],
g_cumsum->nb[1], g_cumsum->nb[2], g_cumsum->nb[3],
(g_cumsum->ne[0] - 1) * ggml_element_size(g_cumsum));
g_last = ggml_cont(ctx0, g_last);
cb(g_last, "g_last", il);
ggml_tensor * g_last_exp = ggml_exp(ctx0, g_last);
cb(g_last_exp, "g_last_exp", il);
ggml_tensor * g_last_repeat =
ggml_repeat_4d(ctx0, g_last, chunk_size, 1, n_chunks, H_v * n_seqs);
ggml_tensor * g_diff = ggml_neg(ctx0, ggml_sub(ctx0, g_cumsum, g_last_repeat));
cb(g_diff, "g_diff", il);
ggml_tensor * g_diff_exp = ggml_exp(ctx0, g_diff);
cb(g_diff_exp, "g_diff_exp", il);
ggml_tensor * g_diff_exp_t = ggml_reshape_4d(ctx0, g_diff_exp, 1, chunk_size, n_chunks, g_diff_exp->ne[3]);
ggml_tensor * key_gdiff = ggml_mul(ctx0, k, g_diff_exp_t);
cb(key_gdiff, "key_gdiff", il);
ggml_tensor * key_gdiff_t = ggml_cont(ctx0, ggml_transpose(ctx0, key_gdiff));
cb(key_gdiff_t, "key_gdiff_t", il);
cb(state, "new_state", il);
auto get_slice_2d = [ctx0](ggml_tensor * t, int64_t c) -> ggml_tensor * {
return ggml_view_4d(ctx0, t, t->ne[0], t->ne[1], 1, t->ne[3],
t->nb[1], t->nb[2], t->nb[3], t->nb[2] * c);
};
ggml_tensor * core_attn_out = nullptr;
for (int64_t chunk = 0; chunk < n_chunks; chunk++) {
ggml_tensor * q_chunk = get_slice_2d(q, chunk);
ggml_tensor * v_chunk = get_slice_2d(v, chunk);
ggml_tensor * gexp_chunk = get_slice_2d(gexp, chunk);
ggml_tensor * k_cumdecay_chunk = get_slice_2d(k_cumdecay, chunk);
ggml_tensor * attn_chunk = get_slice_2d(attn_kq, chunk);
cb(attn_chunk, "attn_chunk", il);
ggml_tensor * state_t = ggml_cont_4d(ctx0, ggml_permute(ctx0, state, 1, 0, 2, 3), S_v, S_v, 1, H_v * n_seqs);
cb(state_t, "state_t", il);
ggml_tensor * v_prime = ggml_mul_mat(ctx0, state_t, k_cumdecay_chunk);
cb(v_prime, "v_prime_chunk", il);
ggml_tensor * v_new = ggml_sub(ctx0, v_prime, v_chunk);
ggml_tensor * v_new_t = ggml_cont(ctx0, ggml_transpose(ctx0, v_new));
cb(v_new, "v_new_chunk", il);
ggml_tensor * q_g_exp = ggml_mul(ctx0, q_chunk, gexp_chunk);
cb(q_g_exp, "q_g_exp", il);
ggml_tensor * attn_inter = ggml_mul_mat(ctx0, state_t, q_g_exp);
cb(attn_inter, "attn_inter_chunk", il);
ggml_tensor * v_attn = ggml_mul_mat(ctx0, v_new_t, attn_chunk);
cb(v_attn, "v_attn_chunk", il);
ggml_tensor * core_attn_out_chunk = ggml_sub(ctx0, attn_inter, v_attn);
cb(core_attn_out_chunk, "core_attn_out_chunk", il);
core_attn_out = core_attn_out == nullptr
? core_attn_out_chunk
: ggml_concat(ctx0, core_attn_out, core_attn_out_chunk, 2);
ggml_tensor * k_gdiff_t = get_slice_2d(key_gdiff_t, chunk);
ggml_tensor * kgdmulvnew = ggml_mul_mat(ctx0, v_new_t, k_gdiff_t);
cb(kgdmulvnew, "kgdmulvnew", il);
ggml_tensor * gexp_last_chunk = ggml_cont(ctx0, get_slice_2d(g_last_exp, chunk));
cb(gexp_last_chunk, "gexp_last_chunk", il);
auto s_mul = ggml_mul(ctx0, state, ggml_reshape_4d(ctx0, gexp_last_chunk, gexp_last_chunk->ne[0], gexp_last_chunk->ne[1], H_v, n_seqs));
cb(s_mul, "s_mul", il);
state = ggml_sub(ctx0, s_mul, ggml_reshape_4d(ctx0, kgdmulvnew, kgdmulvnew->ne[0], kgdmulvnew->ne[1], H_v, n_seqs));
}
ggml_tensor * output_tokens = ggml_view_4d(ctx0, core_attn_out,
S_v, n_tokens, H_v, n_seqs,
ggml_row_size(core_attn_out->type, S_v),
ggml_row_size(core_attn_out->type, S_v * DELTA_CHUNK_SIZE * n_chunks),
ggml_row_size(core_attn_out->type, S_v * DELTA_CHUNK_SIZE * n_chunks * H_v), 0);
cb(output_tokens, "output_tokens", il);
output_tokens = ggml_permute(ctx0, output_tokens, 0, 2, 1, 3);
output_tokens = ggml_cont(ctx0, output_tokens);
cb(output_tokens, "output_tokens", il);
return {output_tokens, state};
}
std::pair<ggml_tensor *, ggml_tensor *> delta_net::build_delta_net_autoregressive(ggml_context * ctx0,
ggml_tensor * q, ggml_tensor * k, ggml_tensor * v,
ggml_tensor * g, ggml_tensor * beta, ggml_tensor * state,
int il, const llm_build_cb & cb) {
const int64_t H_k = q->ne[1];
const int64_t n_tokens = q->ne[2];
const int64_t n_seqs = q->ne[3];
const int64_t S_v = v->ne[0];
const int64_t H_v = v->ne[1];
GGML_ASSERT(n_tokens == 1);
GGML_ASSERT(n_seqs == 1);
GGML_ASSERT(H_k == H_v);
GGML_ASSERT(state->ne[0] == S_v && state->ne[1] == S_v && state->ne[2] == H_v && state->ne[3] == n_seqs);
const float scale = 1.0f / sqrtf(S_v);
q = ggml_scale(ctx0, q, scale);
beta = ggml_sigmoid(ctx0, beta);
cb(q, "q_in", il);
cb(k, "k_in", il);
cb(v, "v_in", il);
cb(beta, "beta_in", il);
cb(g, "g_in", il);
ggml_tensor * g_t = ggml_reshape_4d(ctx0, ggml_transpose(ctx0, g), 1, 1, H_k, n_seqs);
ggml_tensor * beta_t = ggml_reshape_4d(ctx0, ggml_transpose(ctx0, beta), 1, 1, H_k, n_seqs);
g_t = ggml_exp(ctx0, g_t);
cb(g_t, "g_t", il);
state = ggml_mul(ctx0, state, g_t);
cb(state, "state", il);
ggml_tensor * k_t_unsqueezed = ggml_reshape_4d(ctx0, k, 1, S_v, H_v, n_seqs);
ggml_tensor * kv_mem = ggml_mul(ctx0, state, k_t_unsqueezed);
cb(kv_mem, "kv_mem", il);
kv_mem = ggml_cont(ctx0, ggml_transpose(ctx0, kv_mem));
cb(kv_mem, "kv_mem_t_cont", il);
kv_mem = ggml_transpose(ctx0, ggml_sum_rows(ctx0, kv_mem));
ggml_tensor * v_t = ggml_reshape_4d(ctx0, v, S_v, 1, H_v, n_seqs);
ggml_tensor * v_diff = ggml_sub(ctx0, v_t, kv_mem);
cb(v_diff, "v_diff", il);
ggml_tensor * delta = ggml_mul(ctx0, v_diff, beta_t);
cb(delta, "delta", il);
ggml_tensor * k_t_delta = ggml_mul(ctx0, ggml_repeat_4d(ctx0, k_t_unsqueezed, S_v, S_v, H_v, n_seqs), delta);
cb(k_t_delta, "k_t_delta", il);
state = ggml_add(ctx0, state, k_t_delta);
ggml_tensor * q_t_unsqueezed = ggml_reshape_4d(ctx0, q, 1, S_v, H_v, n_seqs);
ggml_tensor * state_q = ggml_mul(ctx0, state, q_t_unsqueezed);
cb(state_q, "state_q", il);
state_q = ggml_cont(ctx0, ggml_transpose(ctx0, state_q));
cb(state_q, "state_q_t_cont", il);
ggml_tensor * core_attn_out = ggml_transpose(ctx0, ggml_sum_rows(ctx0, state_q));
cb(core_attn_out, "output_tokens", il);
cb(state, "new_state", il);
return {core_attn_out, state};
}
std::pair<ggml_tensor *, ggml_tensor *> delta_net::build_fused_delta_net(ggml_context * ctx0,
ggml_tensor * q, ggml_tensor * k, ggml_tensor * v,
ggml_tensor * g, ggml_tensor * beta, ggml_tensor * state,
@@ -246,7 +544,9 @@ ggml_tensor * delta_net::build_layer_attn_linear_core(ggml_context * ctx0, ggml_
const int64_t n_seqs = 1;
const int64_t n_seq_tokens = n_tok;
auto [qkv_mixed, z] = build_qkvz(ctx0, cur, il, cb);
auto qkvz = build_qkvz(ctx0, cur, il, cb);
ggml_tensor * qkv_mixed = qkvz.first;
ggml_tensor * z = qkvz.second;
ggml_tensor *alpha, *beta;
if (model.layers[il].ssm_beta_alpha) {
@@ -379,8 +679,14 @@ ggml_tensor * delta_net::build_layer_attn_linear_core(ggml_context * ctx0, ggml_
GGML_ASSERT(identity != nullptr);
GGML_ASSERT(diag_mask != nullptr);
auto [output, new_state] = build_fused_delta_net(ctx0, q_conv, k_conv, v_conv, gate, beta, state, il, cb);
std::pair<ggml_tensor *, ggml_tensor *> attn_out;
// The fused delta-net implementation is only faster than chunked for n_tok <= 8, so use it only in that case
attn_out = n_tok <= lctx.cparams.fused_delta_net ? build_fused_delta_net(ctx0, q_conv, k_conv, v_conv, gate, beta, state, il, cb) :
n_tok == 1 ? build_delta_net_autoregressive(ctx0, q_conv, k_conv, v_conv, gate, beta, state, il, cb)
: build_delta_net_chunking(ctx0, q_conv, k_conv, v_conv, gate, beta, state, causal_mask, identity, diag_mask, il, cb);
ggml_tensor * output = attn_out.first;
ggml_tensor * new_state = attn_out.second;
cb(output, "attn_output", il);
cb(new_state, "new_state", il);
@@ -393,7 +699,8 @@ ggml_tensor * delta_net::build_layer_attn_linear_core(ggml_context * ctx0, ggml_
ggml_tensor * new_ssm_flat = ggml_reshape_2d(ctx0, new_state, ssm_state_dim, 1);
ggml_tensor * new_state_flat = ggml_concat(ctx0, new_conv_flat, new_ssm_flat, 0);
ggml_build_forward_expand(gf, ggml_cpy(ctx0, new_state_flat, state_dst));
ggml_tensor * state_update = new_state_flat;
ggml_build_forward_expand(gf, ggml_cpy(ctx0, state_update, state_dst));
ggml_tensor * attn_out_2d = ggml_reshape_2d(ctx0, output, head_v_dim, num_v_heads * n_tok);
ggml_tensor * z_2d = ggml_reshape_2d(ctx0, z, head_v_dim, num_v_heads * n_tok);
@@ -410,6 +717,7 @@ ggml_tensor * delta_net::build_layer_attn_linear_core(ggml_context * ctx0, ggml_
cb(out, "linear_attn_out", il);
return out;
//return ggml_reshape_2d(ctx0, out, hparams.n_embd, n_tok);
}

11
src/llama-delta-net.h
View File

@@ -8,6 +8,17 @@ struct delta_net {
delta_net(llama_context & lctx, const llama_batch & batch);
~delta_net();
static std::pair<ggml_tensor *, ggml_tensor *> build_delta_net_chunking(ggml_context * ctx0,
ggml_tensor * q, ggml_tensor * k, ggml_tensor * v,
ggml_tensor * g, ggml_tensor * beta, ggml_tensor * state,
ggml_tensor * causal_mask, ggml_tensor * identity,
ggml_tensor * diag_mask, int il, const llm_build_cb & cb);
static std::pair<ggml_tensor *, ggml_tensor *> build_delta_net_autoregressive(ggml_context * ctx0,
ggml_tensor * q, ggml_tensor * k, ggml_tensor * v,
ggml_tensor * g, ggml_tensor * beta, ggml_tensor * state,
int il, const llm_build_cb & cb);
static std::pair<ggml_tensor *, ggml_tensor *> build_fused_delta_net(ggml_context * ctx0,
ggml_tensor * q, ggml_tensor * k, ggml_tensor * v,
ggml_tensor * g, ggml_tensor * beta, ggml_tensor * state,

4
src/llama.cpp
View File

@@ -1512,7 +1512,6 @@ static void llm_load_print_meta(llama_model_loader & ml, llama_model & model) {
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);
LLAMA_LOG_INFO("%s: ssm_dt_rank = %u\n", __func__, hparams.ssm_dt_rank);
LLAMA_LOG_INFO("%s: ssm_n_group = %u\n", __func__, hparams.ssm_n_group);
}
LLAMA_LOG_INFO("%s: model type = %s\n", __func__, llama_model_type_name(model.type));
@@ -4395,6 +4394,7 @@ struct llama_context_params llama_context_default_params() {
/*.split_mode_graph_scheduling =*/ false,
// /*.split_mode_f16 =*/ true,
/*.scheduler_async =*/ false,
/*.fused_delta_net =*/ 65536,
/*.mtp =*/ false,
/*.mtp_op_type =*/ MTP_OP_NONE,
/*.abort_callback =*/ nullptr,
@@ -4766,6 +4766,7 @@ struct llama_context * llama_init_from_model(
cparams.split_mode_graph_scheduling = params.split_mode_graph_scheduling;
//cparams.split_mode_f16 = params.split_mode_f16;
cparams.scheduler_async = params.scheduler_async;
cparams.fused_delta_net = params.fused_delta_net;
cparams.min_experts = params.min_experts;
cparams.thresh_experts = params.thresh_experts;
cparams.cuda_params = params.cuda_params;
@@ -4872,6 +4873,7 @@ struct llama_context * llama_init_from_model(
//LLAMA_LOG_INFO("%s: split_mode_f16= %d\n", __func__, cparams.split_mode_f16);
LLAMA_LOG_INFO("%s: reduce_type = %s\n", __func__, ggml_type_name(cparams.reduce_type));
LLAMA_LOG_INFO("%s: sched_async = %d\n", __func__, cparams.scheduler_async);
LLAMA_LOG_INFO("%s: fused_delta = %d\n", __func__, cparams.fused_delta_net);
LLAMA_LOG_INFO("%s: ser = %d, %g\n", __func__, cparams.min_experts, cparams.thresh_experts);
LLAMA_LOG_INFO("%s: freq_base = %.1f\n", __func__, cparams.rope_freq_base);
LLAMA_LOG_INFO("%s: freq_scale = %g\n", __func__, cparams.rope_freq_scale);