llama : (mrope) allow using normal 1D position for text token #13138
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ngxson
commented
Apr 27, 2025
src/llama-graph.cpp
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| ggml_tensor * llm_graph_context::build_inp_attn_scale() const { | ||
| auto inp = std::make_unique<llm_graph_input_attn_temp>(n_pos_per_token(), hparams.n_attn_temp_floor_scale, hparams.f_attn_temp_scale); | ||
| auto inp = std::make_unique<llm_graph_input_attn_temp>(n_pos_per_embd(), hparams.n_attn_temp_floor_scale, hparams.f_attn_temp_scale); |
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@ggerganov Because build_inp_attn_scale is currently used exclusively by llama 4, do you think we should get rid of n_pos_per_embd and replace it with a GGML_ASSERT(n_pos_per_embd() == 1) ?
The main motivation is to make this code looks less complicated, as there is ~0% chance Qwen model gonna use this
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On second thought, build_inp_attn_scale should work well even in the case of N pos per token.
That's because the scale is applied per embedding, and the number of embedding is independent from N pos per token.
In any cases, I removed the n_pos_per_embd in 9cd16a3 , merging this PR once the CI is green
ggerganov
approved these changes
Apr 28, 2025
src/llama-graph.cpp
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| ggml_tensor * llm_graph_context::build_inp_attn_scale() const { | ||
| auto inp = std::make_unique<llm_graph_input_attn_temp>(n_pos_per_token(), hparams.n_attn_temp_floor_scale, hparams.f_attn_temp_scale); | ||
| auto inp = std::make_unique<llm_graph_input_attn_temp>(n_pos_per_embd(), hparams.n_attn_temp_floor_scale, hparams.f_attn_temp_scale); |
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For M-RoPE, we want to use normal 1D position for text token.
This is done to simplify the use case of
llama_decode()with text tokens, which is needed for adding Qwen2VL tolibmtmdand toserver.cppThis should also align with #11875, because in the future we want text position to be tracked internally by
libllama