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main : evaluate tokens in batches after swapping context (#1014)

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* examples : evaluate tokens in batches after swapping context

* Update examples/main/main.cpp

---------

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>
This commit is contained in:
Alex Klinkhamer 2023-04-21 11:18:09 -07:00 committed by GitHub
parent 8687c1f258
commit 9411288271
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1 changed files with 13 additions and 5 deletions
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examples/main/main.cpp
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@ -264,7 +264,7 @@ int main(int argc, char ** argv) {
// infinite text generation via context swapping
// if we run out of context:
// - take the n_keep first tokens from the original prompt (via n_past)
// - take half of the last (n_ctx - n_keep) tokens and recompute the logits in a batch
// - take half of the last (n_ctx - n_keep) tokens and recompute the logits in batches
if (n_past + (int) embd.size() > n_ctx) {
const int n_left = n_past - params.n_keep;
@ -282,13 +282,21 @@ int main(int argc, char ** argv) {
//printf("\n---\n");
}
if (llama_eval(ctx, embd.data(), embd.size(), n_past, params.n_threads)) {
fprintf(stderr, "%s : failed to eval\n", __func__);
return 1;
// evaluate tokens in batches
// embd is typically prepared beforehand to fit within a batch, but not always
for (int i = 0; i < (int) embd.size(); i += params.n_batch) {
int n_eval = (int) embd.size() - i;
if (n_eval > params.n_batch) {
n_eval = params.n_batch;
}
if (llama_eval(ctx, &embd[i], n_eval, n_past, params.n_threads)) {
fprintf(stderr, "%s : failed to eval\n", __func__);
return 1;
}
n_past += n_eval;
}
}
n_past += embd.size();
embd.clear();
if ((int) embd_inp.size() <= n_consumed && !is_interacting) {