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embeddings: fix extraction of CLS pooling results #14927

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Merged
merged 2 commits into from
Jul 30, 2025
Merged

embeddings: fix extraction of CLS pooling results #14927

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c7968a4
embeddings: fix extraction of CLS pooling results
iamlemec Jul 28, 2025
cb9ea7e
merge RANK pooling into CLS case for inputs
iamlemec Jul 29, 2025
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43 changes: 16 additions & 27 deletions src/llama-graph.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -188,38 +188,23 @@ void llm_graph_input_mean::set_input(const llama_ubatch * ubatch) {

void llm_graph_input_cls::set_input(const llama_ubatch * ubatch) {
const int64_t n_tokens = ubatch->n_tokens;
const int64_t n_seq_tokens = ubatch->n_seq_tokens;
const int64_t n_seqs_unq = ubatch->n_seqs_unq;

if (cparams.embeddings && (
cparams.pooling_type == LLAMA_POOLING_TYPE_CLS ||
cparams.pooling_type == LLAMA_POOLING_TYPE_RANK
)) {
cparams.pooling_type == LLAMA_POOLING_TYPE_CLS ||
cparams.pooling_type == LLAMA_POOLING_TYPE_RANK ||
cparams.pooling_type == LLAMA_POOLING_TYPE_LAST
)) {
GGML_ASSERT(cls);
GGML_ASSERT(ggml_backend_buffer_is_host(cls->buffer));

uint32_t * data = (uint32_t *) cls->data;
memset(cls->data, 0, n_seqs_unq*ggml_element_size(cls));

for (int i = 0; i < n_tokens; i += n_seq_tokens) {
for (int s = 0; s < ubatch->n_seq_id[i]; ++s) {
const llama_seq_id seq_id = ubatch->seq_id[i][s];
const int32_t seq_idx = ubatch->seq_idx[seq_id];

data[seq_idx] = i;
}
}
}

if (cparams.embeddings && cparams.pooling_type == LLAMA_POOLING_TYPE_LAST) {
GGML_ASSERT(cls);
GGML_ASSERT(ggml_backend_buffer_is_host(cls->buffer));

uint32_t * data = (uint32_t *) cls->data;
memset(cls->data, 0, n_seqs_unq*ggml_element_size(cls));
std::vector<int> target_pos(n_seqs_unq, -1);
std::vector<int> target_row(n_seqs_unq, -1);

std::vector<int> last_pos(n_seqs_unq, -1);
std::vector<int> last_row(n_seqs_unq, -1);
bool last = cparams.pooling_type == LLAMA_POOLING_TYPE_LAST;

for (int i = 0; i < n_tokens; ++i) {
const llama_pos pos = ubatch->pos[i];
Expand All @@ -228,16 +213,20 @@ void llm_graph_input_cls::set_input(const llama_ubatch * ubatch) {
const llama_seq_id seq_id = ubatch->seq_id[i][s];
const int32_t seq_idx = ubatch->seq_idx[seq_id];

if (pos >= last_pos[seq_idx]) {
last_pos[seq_idx] = pos;
last_row[seq_idx] = i;
if (
(target_pos[seq_idx] == -1) ||
( last && pos >= target_pos[seq_idx]) ||
(!last && pos < target_pos[seq_idx])
) {
target_pos[seq_idx] = pos;
target_row[seq_idx] = i;
}
}
}

for (int s = 0; s < n_seqs_unq; ++s) {
if (last_row[s] >= 0) {
data[s] = last_row[s];
if (target_row[s] >= 0) {
data[s] = target_row[s];
}
}
}
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