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perplexity : require positive --ctx-size arg #6695

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Apr 16, 2024
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perplexity : require positive --ctx-size arg #6695

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14 changes: 11 additions & 3 deletions examples/perplexity/perplexity.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1852,12 +1852,20 @@ int main(int argc, char ** argv) {

const int32_t n_ctx = params.n_ctx;

if (n_ctx <= 0) {
fprintf(stderr, "%s: perplexity tool requires '--ctx-size' > 0\n", __func__);
return 1;
}

const bool ppl = !params.hellaswag && !params.winogrande && !params.multiple_choice && !params.kl_divergence;

if (ppl) {
int n_seq = std::max(1, params.n_batch / n_ctx);
int32_t n_kv = n_seq * n_ctx;
const int32_t n_seq = std::max(1, params.n_batch / n_ctx);
const int32_t n_kv = n_seq * n_ctx;

params.n_parallel = n_seq;
params.n_ctx = n_kv;
params.n_ctx = n_kv;

params.n_batch = std::min(params.n_batch, n_kv);
} else {
params.n_batch = std::min(params.n_batch, params.n_ctx);
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