ggml_vec_dot_q8_q8 mma optimize #6
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Implement dot product of two vectors using MMA.
Tried change with different batch sizes.
batch_size = 4,8,16,32 -> llama-batched-benchm similar results to base. after batch_size=64, degrades perf .
llama-bench also gives similar results to base. No perf gain.
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