context : round n_tokens to next multiple of n_seqs when reserving

This fixes RWKV inference which fails when ubatch.n_seq_tokens is 0.
2026-04-16 16:27:32 +03:00 · 2025-06-11 16:19:17 -04:00
1 changed files with 1 additions and 1 deletions
--- a/src/llama-context.cpp
+++ b/src/llama-context.cpp
@@ -1332,7 +1332,7 @@ ggml_cgraph * llama_context::graph_reserve(uint32_t n_tokens, uint32_t n_seqs, u
    LLAMA_LOG_DEBUG("%s: reserving a graph for ubatch with n_tokens = %4u, n_seqs = %2u, n_outputs = %4u\n", __func__, n_tokens, n_seqs, n_outputs);

    if (n_tokens % n_seqs != 0) {
-        n_tokens = (n_tokens / n_seqs) * n_seqs;
+        n_tokens = ((n_tokens + (n_seqs - 1)) / n_seqs) * n_seqs; // round to next multiple of n_seqs
        n_outputs = std::min(n_outputs, n_tokens);

        LLAMA_LOG_DEBUG("%s: making n_tokens a multiple of n_seqs - n_tokens = %u, n_seqs = %u, n_outputs = %u\n", __func__, n_tokens, n_seqs, n_outputs);