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talk-llama : sync llama.cpp

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This commit is contained in:
Georgi Gerganov
2025-07-28 13:02:32 +03:00
parent 5b4646df1a
commit d0a9d8c7f8
27 changed files with 3566 additions and 995 deletions
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examples/talk-llama/llama-context.cpp
+185 -111
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@@ -98,10 +98,20 @@ llama_context::llama_context(
LLAMA_LOG_WARN("%s: n_batch is less than GGML_KQ_MASK_PAD - increasing to %d\n", __func__, GGML_KQ_MASK_PAD);
cparams.n_batch = GGML_KQ_MASK_PAD;
}
cparams.n_ubatch = std::min(cparams.n_batch, params.n_ubatch == 0 ? params.n_batch : params.n_ubatch);
cparams.op_offload = params.op_offload;
cparams.kv_unified = params.kv_unified;
{
const char * LLAMA_SET_ROWS = getenv("LLAMA_SET_ROWS");
supports_set_rows = LLAMA_SET_ROWS ? (atoi(LLAMA_SET_ROWS) != 0) : false;
if (!supports_set_rows && !cparams.kv_unified) {
LLAMA_LOG_WARN("%s: non-unified KV cache requires ggml_set_rows() - forcing unified KV cache\n", __func__);
cparams.kv_unified = true;
}
}
const uint32_t n_ctx_per_seq = cparams.n_ctx / cparams.n_seq_max;
@@ -112,6 +122,7 @@ llama_context::llama_context(
LLAMA_LOG_INFO("%s: n_ubatch = %u\n", __func__, cparams.n_ubatch);
LLAMA_LOG_INFO("%s: causal_attn = %d\n", __func__, cparams.causal_attn);
LLAMA_LOG_INFO("%s: flash_attn = %d\n", __func__, cparams.flash_attn);
LLAMA_LOG_INFO("%s: kv_unified = %s\n", __func__, cparams.kv_unified ? "true" : "false");
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);
@@ -227,8 +238,8 @@ llama_context::llama_context(
LLAMA_LOG_DEBUG("%s: max_nodes = %zu\n", __func__, max_nodes);
// buffer used to store the computation graph and the tensor meta data
buf_compute_meta.resize(ggml_tensor_overhead()*max_nodes + ggml_graph_overhead_custom(max_nodes, false));
gf_res_prev.reset(new llm_graph_result(max_nodes));
gf_res_reserve.reset(new llm_graph_result(max_nodes));
// TODO: move these checks to ggml_backend_sched
// enabling pipeline parallelism in the scheduler increases memory usage, so it is only done when necessary
@@ -267,7 +278,7 @@ llama_context::llama_context(
// reserve worst-case graph
if (!hparams.vocab_only && memory) {
const uint32_t n_seqs = cparams.n_seq_max;
const uint32_t n_seqs = cparams.kv_unified ? 1 : cparams.n_seq_max;
const uint32_t n_tokens = std::min(cparams.n_ctx, cparams.n_ubatch);
LLAMA_LOG_DEBUG("%s: worst-case: n_tokens = %d, n_seqs = %d, n_outputs = %d\n", __func__, n_tokens, n_seqs, n_outputs);
@@ -287,7 +298,7 @@ llama_context::llama_context(
cross.v_embd.clear();
// reserve pp graph first so that buffers are only allocated once
// reserve pp (prompt processing) graph first so that buffers are only allocated once
{
auto * gf = graph_reserve(n_tokens, n_seqs, n_tokens, mctx.get());
if (!gf) {
@@ -298,9 +309,9 @@ llama_context::llama_context(
n_nodes_pp = ggml_graph_n_nodes(gf);
}
// reserve with tg graph to get the number of splits and nodes
// reserve with tg (token generation) graph to get the number of splits and nodes
{
auto * gf = graph_reserve(1, 1, 1, mctx.get());
auto * gf = graph_reserve(n_seqs, n_seqs, n_seqs, mctx.get());
if (!gf) {
throw std::runtime_error("failed to allocate compute tg buffers");
}
@@ -311,6 +322,10 @@ llama_context::llama_context(
// reserve again with pp graph to avoid ggml-alloc reallocations during inference
{
// TODO: not sure if the following graph would be worster case for multi-stream KV caches:
//
// auto * gf = graph_reserve(n_tokens, 1, n_tokens, mctx.get());
//
auto * gf = graph_reserve(n_tokens, n_seqs, n_tokens, mctx.get());
if (!gf) {
throw std::runtime_error("failed to allocate compute pp buffers");
@@ -388,10 +403,6 @@ ggml_backend_sched_t llama_context::get_sched() const {
return sched.get();
}
ggml_context * llama_context::get_ctx_compute() const {
return ctx_compute.get();
}
uint32_t llama_context::n_ctx() const {
return cparams.n_ctx;
}
@@ -463,6 +474,11 @@ bool llama_context::kv_self_update(bool optimize) {
}
}
// reset the previous graph result to make sure that it won't be reused
// TODO: change the mctx->apply() to return information if a graph reserve is needed
// reset the graph result only if the memory module did reset the scheduler
gf_res_prev->reset();
if (!mctx->apply()) {
LLAMA_LOG_ERROR("%s: failed to apply memory update\n", __func__);
}
@@ -475,7 +491,7 @@ bool llama_context::kv_self_update(bool optimize) {
throw std::runtime_error("failed to initialize memory context");
}
const uint32_t n_seqs = cparams.n_seq_max;
const uint32_t n_seqs = cparams.kv_unified ? 1 : cparams.n_seq_max;
const uint32_t n_tokens = std::min(cparams.n_ctx, cparams.n_ubatch);
auto * gf = graph_reserve(n_tokens, n_seqs, n_tokens, mctx.get());
@@ -492,12 +508,16 @@ enum llama_pooling_type llama_context::pooling_type() const {
}
float * llama_context::get_logits() {
output_reorder();
return logits;
}
float * llama_context::get_logits_ith(int32_t i) {
int64_t j = -1;
output_reorder();
try {
if (logits == nullptr) {
throw std::runtime_error("no logits");
@@ -534,12 +554,16 @@ float * llama_context::get_logits_ith(int32_t i) {
}
float * llama_context::get_embeddings() {
output_reorder();
return embd;
}
float * llama_context::get_embeddings_ith(int32_t i) {
int64_t j = -1;
output_reorder();
try {
if (embd == nullptr) {
throw std::runtime_error("no embeddings");
@@ -678,38 +702,59 @@ bool llama_context::apply_adapter_cvec(
return cvec.apply(model, data, len, n_embd, il_start, il_end);
}
llm_graph_result_ptr llama_context::process_ubatch(const llama_ubatch & ubatch, llm_graph_type gtype, llama_memory_context_i * mctx, ggml_status & ret) {
llm_graph_result * llama_context::process_ubatch(const llama_ubatch & ubatch, llm_graph_type gtype, llama_memory_context_i * mctx, ggml_status & ret) {
if (mctx && !mctx->apply()) {
LLAMA_LOG_ERROR("%s: failed to apply memory context\n", __func__);
ret = GGML_STATUS_FAILED;
return nullptr;
}
auto * gf = graph_init();
if (!gf) {
LLAMA_LOG_ERROR("%s: failed to initialize graph\n", __func__);
ret = GGML_STATUS_FAILED;
return nullptr;
auto * res = gf_res_prev.get();
auto * gf = res->get_gf();
// the new graph parameters
// in order to correctly reuse a graph, it's full topology has to be uniquely determined by these parameters
const auto gparams = graph_params(res, ubatch, mctx, gtype);
if (res->can_reuse(gparams)) {
//LLAMA_LOG_DEBUG("%s: reusing previous graph\n", __func__);
n_reused++;
} else {
res->reset();
ggml_backend_sched_reset(sched.get());
ggml_backend_sched_set_eval_callback(sched.get(), cparams.cb_eval, cparams.cb_eval_user_data);
//const auto t_start_us = ggml_time_us();
gf = model.build_graph(gparams);
//LLAMA_LOG_INFO("graph build time: %.3f ms\n", (ggml_time_us() - t_start_us)/1000.0);
if (!gf) {
LLAMA_LOG_ERROR("%s: failed to initialize graph\n", __func__);
ret = GGML_STATUS_FAILED;
return nullptr;
}
if (!ggml_backend_sched_alloc_graph(sched.get(), gf)) {
LLAMA_LOG_ERROR("%s: failed to allocate graph\n", __func__);
ret = GGML_STATUS_ALLOC_FAILED;
return nullptr;
}
}
auto res = graph_build(ctx_compute.get(), gf, ubatch, gtype, mctx);
if (!res) {
LLAMA_LOG_ERROR("%s: failed to build graph\n", __func__);
ret = GGML_STATUS_FAILED;
return nullptr;
// set the input data for the input tensors
{
//const auto t_start_us = ggml_time_us();
res->set_inputs(&ubatch);
//LLAMA_LOG_INFO("graph set inputs time: %.3f ms\n", (ggml_time_us() - t_start_us)/1000.0);
}
// LLAMA_LOG_INFO("graph build time: %.3f ms (%d nodes, %d leafs)\n", (ggml_time_us() - t_start_us)/1000.0, gf->n_nodes, gf->n_leafs);
if (!ggml_backend_sched_alloc_graph(sched.get(), gf)) {
LLAMA_LOG_ERROR("%s: failed to allocate graph\n", __func__);
ret = GGML_STATUS_ALLOC_FAILED;
return nullptr;
}
res->set_inputs(&ubatch);
const auto status = graph_compute(gf, ubatch.n_tokens > 1);
const auto status = graph_compute(res->get_gf(), ubatch.n_tokens > 1);
if (status != GGML_STATUS_SUCCESS) {
LLAMA_LOG_ERROR("%s: failed to compute graph, compute status: %d\n", __func__, status);
ret = status;
@@ -731,16 +776,19 @@ int llama_context::encode(const llama_batch & batch_inp) {
const auto & hparams = model.hparams;
const int64_t n_embd = hparams.n_embd;
const int64_t n_embd = hparams.n_embd;
const int32_t n_vocab = model.vocab.n_tokens();
// note: during encode, we always pass the full sequence starting from pos = 0
if (!balloc->init(batch_inp, model.vocab, nullptr, n_embd, true)) {
if (!balloc->init(batch_inp, model.vocab, nullptr, n_embd, cparams.kv_unified ? LLAMA_MAX_SEQ : cparams.n_seq_max, true)) {
LLAMA_LOG_ERROR("%s: failed to initialize batch\n", __func__);
return -1;
}
const uint32_t n_tokens = balloc->get_n_tokens();
// [TAG_NO_CACHE_PAD]
// TODO: add new split mode where we pad the input sequences so that ubatch.equal_seqs == true
const llama_ubatch ubatch = balloc->split_simple(n_tokens);
// micro-batching is not possible for non-causal encoding, so we process the batch in a single shot
@@ -767,9 +815,6 @@ int llama_context::encode(const llama_batch & batch_inp) {
n_outputs = n_tokens;
ggml_backend_sched_reset(sched.get());
ggml_backend_sched_set_eval_callback(sched.get(), cparams.cb_eval, cparams.cb_eval_user_data);
const auto causal_attn_org = cparams.causal_attn;
// always use non-causal attention for encoder graphs
@@ -778,7 +823,7 @@ int llama_context::encode(const llama_batch & batch_inp) {
cparams.causal_attn = false;
ggml_status status;
const auto res = process_ubatch(ubatch, LLM_GRAPH_TYPE_ENCODER, nullptr, status);
const auto * res = process_ubatch(ubatch, LLM_GRAPH_TYPE_ENCODER, nullptr, status);
cparams.causal_attn = causal_attn_org;
@@ -791,10 +836,20 @@ int llama_context::encode(const llama_batch & batch_inp) {
}
}
auto * t_logits = res->get_logits();
auto * t_embd = res->get_embd_pooled() ? res->get_embd_pooled() : res->get_embd();
// extract logits
if (logits && t_logits) {
ggml_backend_t backend_res = ggml_backend_sched_get_tensor_backend(sched.get(), t_logits);
GGML_ASSERT(backend_res != nullptr);
GGML_ASSERT(logits != nullptr);
ggml_backend_tensor_get_async(backend_res, t_logits, logits, 0, n_tokens*n_vocab*sizeof(float));
}
// extract embeddings
if (t_embd) {
if (embd && t_embd) {
ggml_backend_t backend_embd = ggml_backend_sched_get_tensor_backend(sched.get(), t_embd);
GGML_ASSERT(backend_embd != nullptr);
@@ -844,9 +899,11 @@ int llama_context::encode(const llama_batch & batch_inp) {
}
}
// Reset state for the next token before backend sync, to allow the CPU activities in the reset to
// overlap with device computation.
ggml_backend_sched_reset(sched.get());
if (!supports_set_rows) {
// Reset state for the next token before backend sync, to allow the CPU activities in the reset to
// overlap with device computation.
ggml_backend_sched_reset(sched.get());
}
// TODO: hacky solution
if (model.arch == LLM_ARCH_T5 && t_embd) {
@@ -899,7 +956,7 @@ int llama_context::decode(const llama_batch & batch_inp) {
// when computing embeddings, all tokens are output
const bool output_all = cparams.embeddings;
if (!balloc->init(batch_inp, vocab, memory.get(), n_embd, output_all)) {
if (!balloc->init(batch_inp, vocab, memory.get(), n_embd, cparams.kv_unified ? LLAMA_MAX_SEQ : cparams.n_seq_max, output_all)) {
LLAMA_LOG_ERROR("%s: failed to initialize batch\n", __func__);
return -1;
}
@@ -927,6 +984,7 @@ int llama_context::decode(const llama_batch & batch_inp) {
// TODO: this clear of the buffer can easily be forgotten - need something better
embd_seq.clear();
output_swaps.clear();
bool did_optimize = false;
@@ -1005,11 +1063,8 @@ int llama_context::decode(const llama_batch & batch_inp) {
n_outputs = n_outputs_new;
}
ggml_backend_sched_reset(sched.get());
ggml_backend_sched_set_eval_callback(sched.get(), cparams.cb_eval, cparams.cb_eval_user_data);
ggml_status status;
const auto res = process_ubatch(ubatch, LLM_GRAPH_TYPE_DECODER, mctx.get(), status);
const auto * res = process_ubatch(ubatch, LLM_GRAPH_TYPE_DECODER, mctx.get(), status);
if (!res) {
// the last ubatch failed or was aborted -> remove all positions of that ubatch from the KV cache
@@ -1149,9 +1204,6 @@ int llama_context::decode(const llama_batch & batch_inp) {
// make the outputs have the same order they had in the user-provided batch
// note: this is mostly relevant for recurrent models atm
if (!sorted_output) {
const uint32_t n_vocab = model.vocab.n_tokens();
const uint64_t n_embd = model.hparams.n_embd;
GGML_ASSERT((size_t) n_outputs == out_ids.size());
// TODO: is there something more efficient which also minimizes swaps?
@@ -1167,16 +1219,9 @@ int llama_context::decode(const llama_batch & batch_inp) {
continue;
}
std::swap(out_ids[i], out_ids[j_min]);
if (logits_size > 0) {
for (uint32_t k = 0; k < n_vocab; k++) {
std::swap(logits[i*n_vocab + k], logits[j_min*n_vocab + k]);
}
}
if (embd_size > 0) {
for (uint32_t k = 0; k < n_embd; k++) {
std::swap(embd[i*n_embd + k], embd[j_min*n_embd + k]);
}
}
// remember the swaps and apply them lazily upon logits/embeddings access
output_swaps.push_back({ i, j_min });
}
std::fill(output_ids.begin(), output_ids.end(), -1);
@@ -1190,9 +1235,11 @@ int llama_context::decode(const llama_batch & batch_inp) {
// wait for the computation to finish (automatically done when obtaining the model output)
//synchronize();
// Reset state for the next token before backend sync, to allow the CPU activities in the reset to
// overlap with device computation.
ggml_backend_sched_reset(sched.get());
if (!supports_set_rows) {
// Reset state for the next token before backend sync, to allow the CPU activities in the reset to
// overlap with device computation.
ggml_backend_sched_reset(sched.get());
}
return 0;
}
@@ -1271,24 +1318,40 @@ uint32_t llama_context::output_reserve(int32_t n_outputs) {
return n_outputs_max;
}
void llama_context::output_reorder() {
const uint32_t n_vocab = model.vocab.n_tokens();
const uint64_t n_embd = model.hparams.n_embd;
for (uint32_t s = 0; s < output_swaps.size(); ++s) {
const uint32_t i0 = output_swaps[s].i0;
const uint32_t i1 = output_swaps[s].i1;
if (logits_size > 0) {
for (uint32_t k = 0; k < n_vocab; k++) {
std::swap(logits[i0*n_vocab + k], logits[i1*n_vocab + k]);
}
}
if (embd_size > 0) {
for (uint32_t k = 0; k < n_embd; k++) {
std::swap(embd[i0*n_embd + k], embd[i1*n_embd + k]);
}
}
}
output_swaps.clear();
}
//
// graph
//
int32_t llama_context::graph_max_nodes() const {
return std::max<int32_t>(65536, 5*model.n_tensors());
uint32_t llama_context::graph_max_nodes() const {
return std::max<uint32_t>(1024u, 8u*model.n_tensors());
}
ggml_cgraph * llama_context::graph_init() {
ggml_init_params params = {
/*.mem_size =*/ buf_compute_meta.size(),
/*.mem_buffer =*/ buf_compute_meta.data(),
/*.no_alloc =*/ true,
};
ctx_compute.reset(ggml_init(params));
return ggml_new_graph_custom(ctx_compute.get(), graph_max_nodes(), false);
llm_graph_result * llama_context::get_gf_res_reserve() const {
return static_cast<llm_graph_result *>(gf_res_reserve.get());
}
ggml_cgraph * llama_context::graph_reserve(uint32_t n_tokens, uint32_t n_seqs, uint32_t n_outputs, const llama_memory_context_i * mctx) {
@@ -1301,6 +1364,11 @@ ggml_cgraph * llama_context::graph_reserve(uint32_t n_tokens, uint32_t n_seqs, u
LLAMA_LOG_DEBUG("%s: making n_tokens a multiple of n_seqs - n_tokens = %u, n_seqs = %u, n_outputs = %u\n", __func__, n_tokens, n_seqs, n_outputs);
}
ggml_backend_sched_reset(sched.get());
// when the scheduler is reset, we cannnot reuse the old graph, so we reset the previous graph result to prevent that
gf_res_prev->reset();
// store the n_outputs as it is, and restore it afterwards
// TODO: not sure if needed, might simplify in the future by removing this
const auto save_n_outputs = this->n_outputs;
@@ -1310,18 +1378,16 @@ ggml_cgraph * llama_context::graph_reserve(uint32_t n_tokens, uint32_t n_seqs, u
llama_batch_allocr balloc(model.hparams.n_pos_per_embd());
llama_ubatch ubatch = balloc.ubatch_reserve(n_tokens/n_seqs, n_seqs);
auto * gf = graph_init();
auto res = graph_build(ctx_compute.get(), gf, ubatch, LLM_GRAPH_TYPE_DEFAULT, mctx);
auto * res = gf_res_reserve.get();
const auto gparams = graph_params(res, ubatch, mctx, LLM_GRAPH_TYPE_DEFAULT);
res->reset();
auto * gf = model.build_graph(gparams);
this->n_outputs = save_n_outputs;
if (!res) {
LLAMA_LOG_ERROR("%s: failed to build worst-case graph\n", __func__);
return nullptr;
}
ggml_backend_sched_reset(sched.get());
// initialize scheduler with the specified graph
if (!ggml_backend_sched_reserve(sched.get(), gf)) {
LLAMA_LOG_ERROR("%s: failed to allocate compute buffers\n", __func__);
@@ -1331,28 +1397,27 @@ ggml_cgraph * llama_context::graph_reserve(uint32_t n_tokens, uint32_t n_seqs, u
return gf;
}
llm_graph_result_ptr llama_context::graph_build(
ggml_context * ctx,
ggml_cgraph * gf,
const llama_ubatch & ubatch,
llm_graph_type gtype,
const llama_memory_context_i * mctx) {
return model.build_graph(
{
/*.ctx =*/ ctx,
/*.arch =*/ model.arch,
/*.hparams =*/ model.hparams,
/*.cparams =*/ cparams,
/*.ubatch =*/ ubatch,
/*.sched =*/ sched.get(),
/*.backend_cpu =*/ backend_cpu,
/*.cvec =*/ &cvec,
/*.loras =*/ &loras,
/*.mctx =*/ mctx,
/*.cross =*/ &cross,
/*.n_outputs =*/ n_outputs,
/*.cb =*/ graph_get_cb(),
}, gf, gtype);
llm_graph_params llama_context::graph_params(
llm_graph_result * res,
const llama_ubatch & ubatch,
const llama_memory_context_i * mctx,
llm_graph_type gtype) const {
return {
/*.arch =*/ model.arch,
/*.hparams =*/ model.hparams,
/*.cparams =*/ cparams,
/*.ubatch =*/ ubatch,
/*.gtype =*/ gtype,
/*.sched =*/ sched.get(),
/*.backend_cpu =*/ backend_cpu,
/*.cvec =*/ &cvec,
/*.loras =*/ &loras,
/*.mctx =*/ mctx,
/*.cross =*/ &cross,
/*.n_outputs =*/ n_outputs,
/*.cb =*/ graph_get_cb(),
/*.res =*/ res,
};
}
ggml_status llama_context::graph_compute(
@@ -1930,6 +1995,7 @@ llama_perf_context_data llama_context::perf_get_data() const {
data.t_eval_ms = 1e-3 * t_eval_us;
data.n_p_eval = std::max(1, n_p_eval);
data.n_eval = std::max(1, n_eval);
data.n_reused = std::max(0, n_reused);
return data;
}
@@ -1938,6 +2004,7 @@ void llama_context::perf_reset() {
t_start_us = ggml_time_us();
t_eval_us = n_eval = 0;
t_p_eval_us = n_p_eval = 0;
n_reused = 0;
}
//
@@ -2028,7 +2095,7 @@ void llama_context::opt_epoch_iter(
batch.logits [pos_batch] = true;
}
if (!balloc->init(batch, model.vocab, nullptr, model.hparams.n_embd, true)) {
if (!balloc->init(batch, model.vocab, nullptr, model.hparams.n_embd, cparams.kv_unified ? LLAMA_MAX_SEQ : cparams.n_seq_max, true)) {
LLAMA_LOG_ERROR("%s: failed to initialize batch\n", __func__);
return;
}
@@ -2064,8 +2131,13 @@ void llama_context::opt_epoch_iter(
break;
}
auto * gf = graph_init();
auto res = graph_build(ctx_compute.get(), gf, ubatch, LLM_GRAPH_TYPE_DEFAULT, mctx.get());
auto * res = gf_res_prev.get();
const auto gparams = graph_params(res, ubatch, mctx.get(), LLM_GRAPH_TYPE_DEFAULT);
res->reset();
auto * gf = model.build_graph(gparams);
struct ggml_context * ctx_compute_opt;
{
@@ -2187,6 +2259,7 @@ llama_context_params llama_context_default_params() {
/*.no_perf =*/ true,
/*.op_offload =*/ true,
/*.swa_full =*/ true,
/*.kv_unified =*/ false,
};
return result;
@@ -2807,6 +2880,7 @@ void llama_perf_context_print(const llama_context * ctx) {
LLAMA_LOG_INFO("%s: eval time = %10.2f ms / %5d runs (%8.2f ms per token, %8.2f tokens per second)\n",
__func__, data.t_eval_ms, data.n_eval, data.t_eval_ms / data.n_eval, 1e3 / data.t_eval_ms * data.n_eval);
LLAMA_LOG_INFO("%s: total time = %10.2f ms / %5d tokens\n", __func__, (t_end_ms - data.t_start_ms), (data.n_p_eval + data.n_eval));
LLAMA_LOG_INFO("%s: graphs reused = %10d\n", __func__, data.n_reused);
}
void llama_perf_context_reset(llama_context * ctx) {