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allow disable context shift for sever

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This commit is contained in:
VJHack 2024-09-18 19:34:05 -05:00
parent 64c6af3195
commit 568886416d
3 changed files with 15 additions and 1 deletions
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2
common/arg.cpp
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@ -691,7 +691,7 @@ gpt_params_context gpt_params_parser_init(gpt_params & params, llama_example ex,
[](gpt_params & params) {
params.ctx_shift = false;
}
).set_examples({LLAMA_EXAMPLE_MAIN}));
).set_examples({LLAMA_EXAMPLE_MAIN, LLAMA_EXAMPLE_SERVER}));
add_opt(llama_arg(
{"--chunks"}, "N",
format("max number of chunks to process (default: %d, -1 = all)", params.n_chunks),

1
examples/server/README.md
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@ -37,6 +37,7 @@ The project is under active development, and we are [looking for feedback and co
| `--poll-batch <0\|1>` | use polling to wait for work (default: same as --poll) |
| `-c, --ctx-size N` | size of the prompt context (default: 0, 0 = loaded from model)<br/>(env: LLAMA_ARG_CTX_SIZE) |
| `-n, --predict, --n-predict N` | number of tokens to predict (default: -1, -1 = infinity, -2 = until context filled)<br/>(env: LLAMA_ARG_N_PREDICT) |
| `--no-context-shift` | stop generation when context window is full (default: context shift is enabled)<br/> |
| `-b, --batch-size N` | logical maximum batch size (default: 2048)<br/>(env: LLAMA_ARG_BATCH) |
| `-ub, --ubatch-size N` | physical maximum batch size (default: 512)<br/>(env: LLAMA_ARG_UBATCH) |
| `--keep N` | number of tokens to keep from the initial prompt (default: 0, -1 = all) |

13
examples/server/server.cpp
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@ -1815,6 +1815,13 @@ struct server_context {
for (server_slot & slot : slots) {
if (slot.ga_n == 1) {
if (slot.is_processing() && (int) system_tokens.size() + slot.n_past >= slot.n_ctx - 1) {
if (!params.ctx_shift){
slot.release();
slot.print_timings();
send_final_response(slot);
metrics.on_prediction(slot);
continue;
}
// Shift context
const int n_keep = slot.params.n_keep + add_bos_token;
const int n_left = (int) system_tokens.size() + slot.n_past - n_keep;
@ -1940,6 +1947,12 @@ struct server_context {
send_final_response(slot);
continue;
}
// context shift is disabled and prompt is too large - discard it
if (!params.ctx_shift && slot.n_prompt_tokens > slot.n_ctx ){
slot.release();
send_error(slot, "Input is too large to process. Either disable context shift or increase context length. ", ERROR_TYPE_SERVER);
continue;
}
if (slot.cmpl_type == SERVER_TASK_CMPL_TYPE_EMBEDDING) {
// this prompt is too large to process - discard it