llama : add custom RoPE (#2054)
* Implement customizable RoPE The original RoPE has pre-defined parameters theta_i = 10000^(−2(i−1)/d), for i in [1, 2, ..., d/2] Our customizable RoPE, ggml_rope_custom_inplace, uses theta_i = scale * base^(−2(i−1)/d), for i in [1, 2, ..., d/2] with the default matches the original scale = 1.0 base = 10000 The new command line arguments --rope-freq-base --rope-freq-scale set the two new RoPE parameter. Recent researches show changing these two parameters extends the context limit with minimal loss. 1. Extending Context to 8K kaiokendev https://kaiokendev.github.io/til#extending-context-to-8k 2. Extending Context Window of Large Language Models via Positional Interpolation Shouyuan Chen, Sherman Wong, Liangjian Chen, Yuandong Tian https://arxiv.org/abs/2306.15595 3. NTK-Aware Scaled RoPE allows LLaMA models to have extended (8k+) context size without any fine-tuning and minimal perplexity degradation. https://www.reddit.com/user/bloc97 https://www.reddit.com/r/LocalLLaMA/comments/14lz7j5/ntkaware_scaled_rope_allows_llama_models_to_have/ For the bold, try adding the following command line parameters to your favorite model: -c 16384 --rope-freq-base 80000 --rope-freq-scale 0.5 * ggml-metal: fix custom rope * common: fix argument names in help * llama: increase MEM_REQ_EVAL for MODEL_3B It avoids crashing for quantized weights on CPU. Better ways to calculate the required buffer size would be better. * llama: make MEM_REQ_EVAL depend on n_ctx * server: use proper Content-Type in curl examples Without the header Content-Type: application/json, curl will POST with Content-Type: application/x-www-form-urlencoded Though our simple server doesn't care, the httplib.h used has a limit with CPPHTTPLIB_FORM_URL_ENCODED_PAYLOAD_MAX_LENGTH 8192 With Content-Type: application/json, we can send large json data. * style : minor fixes, mostly indentations * ggml : fix asserts --------- Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>
This commit is contained in:
Xiao-Yong Jin
GitHub
parent
a6803cab94
commit
6e7cca4047
12 changed files with 185 additions and 67 deletions
84
llama.cpp
84
llama.cpp
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@ -101,14 +101,15 @@ static void ggml_graph_compute_helper(std::vector<uint8_t> & buf, ggml_cgraph *
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// memory sizes
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//
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static const std::map<e_model, size_t> & MEM_REQ_SCRATCH0()
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static const std::map<e_model, size_t> & MEM_REQ_SCRATCH0(int n_ctx)
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{
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static std::map<e_model, size_t> k_sizes = {
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{ MODEL_3B, 256ull * MB },
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{ MODEL_7B, 512ull * MB },
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{ MODEL_13B, 512ull * MB },
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{ MODEL_30B, 512ull * MB },
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{ MODEL_65B, 1024ull * MB },
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/* empirical scaling, still a guess */
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{ MODEL_3B, ((size_t) n_ctx / 16ull + 128ull) * MB },
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{ MODEL_7B, ((size_t) n_ctx / 16ull + 256ull) * MB },
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{ MODEL_13B, ((size_t) n_ctx / 12ull + 256ull) * MB },
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{ MODEL_30B, ((size_t) n_ctx / 10ull + 256ull) * MB },
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{ MODEL_65B, ((size_t) n_ctx / 8ull + 512ull) * MB },
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};
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return k_sizes;
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}
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@ -140,14 +141,14 @@ static const std::map<e_model, size_t> & MEM_REQ_KV_SELF()
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// this is mostly needed for temporary mul_mat buffers to dequantize the data
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// not actually needed if BLAS is disabled
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static const std::map<e_model, size_t> & MEM_REQ_EVAL()
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static const std::map<e_model, size_t> & MEM_REQ_EVAL(int n_ctx)
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{
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static std::map<e_model, size_t> k_sizes = {
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{ MODEL_3B, 512ull * MB },
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{ MODEL_7B, 768ull * MB },
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{ MODEL_13B, 1024ull * MB },
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{ MODEL_30B, 1280ull * MB },
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{ MODEL_65B, 1536ull * MB },
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{ MODEL_3B, ((size_t) n_ctx / 256ull + 512ull) * MB },
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{ MODEL_7B, ((size_t) n_ctx / 256ull + 768ull) * MB },
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{ MODEL_13B, ((size_t) n_ctx / 256ull + 1024ull) * MB },
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{ MODEL_30B, ((size_t) n_ctx / 256ull + 1280ull) * MB },
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{ MODEL_65B, ((size_t) n_ctx / 256ull + 1536ull) * MB },
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};
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return k_sizes;
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}
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@ -189,6 +190,10 @@ struct llama_hparams {
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uint32_t n_head = 32;
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uint32_t n_layer = 32;
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uint32_t n_rot = 64;
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float rope_freq_base = 10000.0f;
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float rope_freq_scale = 1.0f;
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enum llama_ftype ftype = LLAMA_FTYPE_MOSTLY_F16;
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bool operator!=(const llama_hparams & other) const {
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@ -647,7 +652,7 @@ struct llama_model_loader {
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*ctx_size_p = *mmapped_size_p = 0;
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for (const llama_load_tensor & lt : tensors_map.tensors) {
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*ctx_size_p += sizeof(struct ggml_tensor) + GGML_OBJECT_SIZE;
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*(use_mmap ? mmapped_size_p : ctx_size_p) += lt.size;
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*(use_mmap ? mmapped_size_p : ctx_size_p) += lt.size + 16;
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}
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}
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@ -843,6 +848,8 @@ struct llama_context_params llama_context_default_params() {
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/*.gpu_layers =*/ 0,
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/*.main_gpu =*/ 0,
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/*.tensor_split =*/ {0},
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/*.rope_freq_base =*/ 10000.0f,
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/*.rope_freq_scale =*/ 1.0f,
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/*.progress_callback =*/ nullptr,
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/*.progress_callback_user_data =*/ nullptr,
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/*.low_vram =*/ false,
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@ -966,6 +973,8 @@ static void llama_model_load_internal(
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int n_gpu_layers,
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int main_gpu,
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const float * tensor_split,
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float rope_freq_base,
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float rope_freq_scale,
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bool low_vram,
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ggml_type memory_type,
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bool use_mmap,
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@ -1000,22 +1009,27 @@ static void llama_model_load_internal(
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}
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hparams.n_ctx = n_ctx;
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hparams.rope_freq_base = rope_freq_base;
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hparams.rope_freq_scale = rope_freq_scale;
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}
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const uint32_t n_ff = ((2*(4*hparams.n_embd)/3 + hparams.n_mult - 1)/hparams.n_mult)*hparams.n_mult;
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{
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fprintf(stderr, "%s: format = %s\n", __func__, llama_file_version_name(file_version));
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fprintf(stderr, "%s: n_vocab = %u\n", __func__, hparams.n_vocab);
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fprintf(stderr, "%s: n_ctx = %u\n", __func__, hparams.n_ctx);
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fprintf(stderr, "%s: n_embd = %u\n", __func__, hparams.n_embd);
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fprintf(stderr, "%s: n_mult = %u\n", __func__, hparams.n_mult);
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fprintf(stderr, "%s: n_head = %u\n", __func__, hparams.n_head);
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fprintf(stderr, "%s: n_layer = %u\n", __func__, hparams.n_layer);
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fprintf(stderr, "%s: n_rot = %u\n", __func__, hparams.n_rot);
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fprintf(stderr, "%s: format = %s\n", __func__, llama_file_version_name(file_version));
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fprintf(stderr, "%s: n_vocab = %u\n", __func__, hparams.n_vocab);
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fprintf(stderr, "%s: n_ctx = %u\n", __func__, hparams.n_ctx);
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fprintf(stderr, "%s: n_embd = %u\n", __func__, hparams.n_embd);
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fprintf(stderr, "%s: n_mult = %u\n", __func__, hparams.n_mult);
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fprintf(stderr, "%s: n_head = %u\n", __func__, hparams.n_head);
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fprintf(stderr, "%s: n_layer = %u\n", __func__, hparams.n_layer);
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fprintf(stderr, "%s: n_rot = %u\n", __func__, hparams.n_rot);
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fprintf(stderr, "%s: freq_base = %.1f\n", __func__, hparams.rope_freq_base);
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fprintf(stderr, "%s: freq_scale = %g\n", __func__, hparams.rope_freq_scale);
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fprintf(stderr, "%s: ftype = %u (%s)\n", __func__, hparams.ftype, llama_ftype_name(hparams.ftype));
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fprintf(stderr, "%s: n_ff = %u\n", __func__, n_ff);
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fprintf(stderr, "%s: model size = %s\n", __func__, llama_model_type_name(model.type));
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fprintf(stderr, "%s: n_ff = %u\n", __func__, n_ff);
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fprintf(stderr, "%s: model size = %s\n", __func__, llama_model_type_name(model.type));
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}
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if (file_version < LLAMA_FILE_VERSION_GGJT_V2) {
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@ -1164,9 +1178,9 @@ static void llama_model_load_internal(
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const size_t mem_required =
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ctx_size +
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mmapped_size - vram_weights + // weights in VRAM not in memory
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MEM_REQ_SCRATCH0().at(model.type) +
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MEM_REQ_SCRATCH0(hparams.n_ctx).at(model.type) +
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MEM_REQ_SCRATCH1().at(model.type) +
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MEM_REQ_EVAL().at (model.type);
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MEM_REQ_EVAL(hparams.n_ctx).at(model.type);
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// this is the memory required by one llama_state
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const size_t mem_required_state =
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@ -1270,6 +1284,8 @@ static bool llama_model_load(
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int n_gpu_layers,
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int main_gpu,
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float * tensor_split,
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float rope_freq_base,
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float rope_freq_scale,
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bool low_vram,
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ggml_type memory_type,
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bool use_mmap,
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@ -1278,7 +1294,7 @@ static bool llama_model_load(
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llama_progress_callback progress_callback,
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void *progress_callback_user_data) {
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try {
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llama_model_load_internal(fname, model, vocab, n_ctx, n_batch, n_gpu_layers, main_gpu, tensor_split, low_vram, memory_type,
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llama_model_load_internal(fname, model, vocab, n_ctx, n_batch, n_gpu_layers, main_gpu, tensor_split, rope_freq_base, rope_freq_scale, low_vram, memory_type,
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use_mmap, use_mlock, vocab_only, progress_callback, progress_callback_user_data);
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return true;
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} catch (const std::exception & err) {
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@ -1330,6 +1346,9 @@ static bool llama_eval_internal(
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const int n_rot = hparams.n_embd/hparams.n_head;
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const int n_gpu_layers = model.n_gpu_layers;
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const float freq_base = hparams.rope_freq_base;
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const float freq_scale = hparams.rope_freq_scale;
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auto & mem_per_token = lctx.mem_per_token;
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auto & buf_compute = lctx.buf_compute;
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@ -1427,11 +1446,11 @@ static bool llama_eval_internal(
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offload_func_kq(tmpq);
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ggml_set_name(tmpq, "tmpq");
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struct ggml_tensor * Kcur = ggml_rope_inplace(ctx0, ggml_reshape_3d(ctx0, tmpk, n_embd/n_head, n_head, N), n_past, n_rot, 0, 0);
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struct ggml_tensor * Kcur = ggml_rope_custom_inplace(ctx0, ggml_reshape_3d(ctx0, tmpk, n_embd/n_head, n_head, N), n_past, n_rot, 0, freq_base, freq_scale, 0);
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offload_func_kq(Kcur);
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ggml_set_name(Kcur, "Kcur");
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struct ggml_tensor * Qcur = ggml_rope_inplace(ctx0, ggml_reshape_3d(ctx0, tmpq, n_embd/n_head, n_head, N), n_past, n_rot, 0, 0);
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struct ggml_tensor * Qcur = ggml_rope_custom_inplace(ctx0, ggml_reshape_3d(ctx0, tmpq, n_embd/n_head, n_head, N), n_past, n_rot, 0, freq_base, freq_scale, 0);
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offload_func_kq(Qcur);
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ggml_set_name(Qcur, "Qcur");
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@ -2674,8 +2693,9 @@ struct llama_model * llama_load_model_from_file(
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ggml_type memory_type = params.f16_kv ? GGML_TYPE_F16 : GGML_TYPE_F32;
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if (!llama_model_load(path_model, *model, model->vocab, params.n_ctx, params.n_batch, params.n_gpu_layers,
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params.main_gpu, params.tensor_split, params.low_vram, memory_type, params.use_mmap, params.use_mlock,
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params.vocab_only, params.progress_callback, params.progress_callback_user_data)) {
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params.main_gpu, params.tensor_split, params.rope_freq_base, params.rope_freq_scale,params.low_vram,
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memory_type, params.use_mmap, params.use_mlock, params.vocab_only, params.progress_callback,
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params.progress_callback_user_data)) {
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delete model;
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fprintf(stderr, "%s: failed to load model\n", __func__);
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return nullptr;
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@ -2750,9 +2770,9 @@ struct llama_context * llama_new_context_with_model(
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ctx->embedding.resize(hparams.n_embd);
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}
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ctx->buf_compute.resize(MEM_REQ_EVAL().at(ctx->model.type));
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ctx->buf_compute.resize(MEM_REQ_EVAL(hparams.n_ctx).at(ctx->model.type));
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ctx->buf_scratch[0].resize(MEM_REQ_SCRATCH0().at(ctx->model.type));
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ctx->buf_scratch[0].resize(MEM_REQ_SCRATCH0(hparams.n_ctx).at(ctx->model.type));
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ctx->buf_scratch[1].resize(MEM_REQ_SCRATCH1().at(ctx->model.type));
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}
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