diff --git a/examples/common.cpp b/examples/common.cpp index 21f4a0357..4d3ba9bb2 100644 --- a/examples/common.cpp +++ b/examples/common.cpp @@ -194,6 +194,12 @@ bool gpt_params_parse(int argc, char ** argv, gpt_params & params) { break; } params.rope_freq_scale = std::stof(argv[i]); + } else if (arg == "--rope-scale") { + if (++i >= argc) { + invalid_param = true; + break; + } + params.rope_freq_scale = 1.0f/std::stof(argv[i]); } else if (arg == "--memory-f32") { params.memory_f16 = false; } else if (arg == "--top-p") { @@ -564,8 +570,9 @@ void gpt_print_usage(int /*argc*/, char ** argv, const gpt_params & params) { fprintf(stdout, " --cfg-negative-prompt PROMPT \n"); fprintf(stdout, " negative prompt to use for guidance. (default: empty)\n"); fprintf(stdout, " --cfg-scale N strength of guidance (default: %f, 1.0 = disable)\n", params.cfg_scale); - fprintf(stdout, " --rope-freq-base N RoPE base frequency (default: %.1f)\n", params.rope_freq_base); - fprintf(stdout, " --rope-freq-scale N RoPE frequency scaling factor (default: %g)\n", params.rope_freq_scale); + fprintf(stdout, " --rope-scale N RoPE context linear scaling factor, inverse of --rope-freq-scale (default: %g)\n", 1.0f/params.rope_freq_scale); + fprintf(stdout, " --rope-freq-base N RoPE base frequency, used by NTK-aware scaling (default: %.1f)\n", params.rope_freq_base); + fprintf(stdout, " --rope-freq-scale N RoPE frequency linear scaling factor, inverse of --rope-scale (default: %g)\n", params.rope_freq_scale); fprintf(stdout, " --ignore-eos ignore end of stream token and continue generating (implies --logit-bias 2-inf)\n"); fprintf(stdout, " --no-penalize-nl do not penalize newline token\n"); fprintf(stdout, " --memory-f32 use f32 instead of f16 for memory key+value (default: disabled)\n"); diff --git a/examples/main/README.md b/examples/main/README.md index 014112e5d..55c16096f 100644 --- a/examples/main/README.md +++ b/examples/main/README.md @@ -140,6 +140,12 @@ The `--ctx-size` option allows you to set the size of the prompt context used by - `-c N, --ctx-size N`: Set the size of the prompt context (default: 512). The LLaMA models were built with a context of 2048, which will yield the best results on longer input/inference. However, increasing the context size beyond 2048 may lead to unpredictable results. +### Extended Context Size + +Some fine-tuned models have extened the context length by scaling RoPE. For example, if the original pretrained model have a context length (max sequence length) of 4096 (4k) and the fine-tuned model have 32k. That is a scaling factor of 8, and should work by setting the above `--ctx-size` to 32768 (32k) and `--rope-scale` to 8. + +- `--rope-scale N`: Where N is the linear scaling factor used by the fine-tuned model. + ### Keep Prompt The `--keep` option allows users to retain the original prompt when the model runs out of context, ensuring a connection to the initial instruction or conversation topic is maintained.