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llama.cpp/ggml
Gaurav Garg 5a460dea9f Remove redundant CUDA copies after gated_delta_net. (#23940)
* Remove redundant CUDA copies after gated_delta_net.

Currently, GDN writes recurrent state snapshots into its output tail, then the graph immediately copies those snapshots into ssm_states_all. With MTP draft length 3, target decode uses K=4, so that becomes 4 extra ggml_cuda_cpy calls.

The change detects that gated_delta_net -> view -> cpy pattern and makes the CUDA GDN kernel write the state snapshot(s) directly into the recurrent cache, skipping the intermediate tail writes and copy kernels when safe.

* Address review comments
2026-07-03 14:36:29 +05:30
..
2024-07-13 18:12:39 +02:00