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model : gemma3n text-only (#14400)

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* gemma3n

* add llm_graph_input_one
This commit is contained in:
Xuan-Son Nguyen
2025-06-26 19:34:02 +02:00
committed by GitHub
parent a01047b041
commit 8846aace49
13 changed files with 960 additions and 15 deletions
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30
src/llama-kv-cache-unified.cpp
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@@ -33,13 +33,19 @@ llama_kv_cache_unified::llama_kv_cache_unified(
GGML_ASSERT(kv_size % n_pad == 0);
// TODO: this is temporary until we support passing reuse layer filters [KV_REUSE]
auto n_layer_cache = hparams.n_layer;
if (model.arch == LLM_ARCH_GEMMA3N) {
n_layer_cache = 20;
}
// create a context for each buffer type
std::map<ggml_backend_buffer_type_t, ggml_context *> ctx_map;
auto ctx_for_buft = [&](ggml_backend_buffer_type_t buft) -> ggml_context * {
auto it = ctx_map.find(buft);
if (it == ctx_map.end()) {
ggml_init_params params = {
/*.mem_size =*/ size_t(2u*hparams.n_layer*ggml_tensor_overhead()),
/*.mem_size =*/ size_t(2u*n_layer_cache*ggml_tensor_overhead()),
/*.mem_buffer =*/ NULL,
/*.no_alloc =*/ true,
};
@@ -62,7 +68,7 @@ llama_kv_cache_unified::llama_kv_cache_unified(
cells.resize(kv_size);
for (uint32_t il = 0; il < hparams.n_layer; il++) {
for (uint32_t il = 0; il < n_layer_cache; il++) {
if (filter && !filter(il)) {
LLAMA_LOG_DEBUG("%s: layer %3d: skipped\n", __func__, il);
continue;
@@ -102,6 +108,26 @@ llama_kv_cache_unified::llama_kv_cache_unified(
layers.push_back({ il, k, v });
}
// TODO: this is temporary until we support passing reuse layer filters [KV_REUSE]
if (model.arch == LLM_ARCH_GEMMA3N) {
LLAMA_LOG_DEBUG("%s: GEMMA3N: reuse layers [%d, %d]\n", __func__, n_layer_cache, hparams.n_layer - 1);
for (uint32_t il = n_layer_cache; il < hparams.n_layer; il++) {
if (filter && !filter(il)) {
LLAMA_LOG_DEBUG("%s: layer %3d: skipped\n", __func__, il);
continue;
}
const bool is_swa = hparams.is_swa(il);
const uint32_t il_reuse = n_layer_cache - (is_swa ? 2 : 1);
GGML_ASSERT(map_layer_ids.find(il_reuse) != map_layer_ids.end());
map_layer_ids[il] = map_layer_ids[il_reuse];
LLAMA_LOG_DEBUG("%s: layer %3d: reuse layer %d, isw = %d\n", __func__, il, il_reuse, is_swa);
}
}
// allocate tensors and initialize the buffers to avoid NaNs in the padding
for (auto it : ctx_map) {
auto * buft = it.first;