llama.cpp : split llama_context_params into model and context params (#3301)

* llama.cpp : split llama_context_params into model and context params

ggml-ci

* fix metal build

* fix freq_base/scale default to model value

* llama-bench : keep the same model between tests when possible

* move n_threads to llama_context_params, add n_threads_batch

* fix mpi build

* remove kv_size(), cuda scratch fixes

* remove low-vram option

* add n_threads_batch to system info, refactor to get_system_info()

* add documentation about --threads-batch to the READMEs

* llama-bench fix

* main : fix rope freq/scale warning

* llama.cpp : add llama_get_model
common : add llama_tokenize from model

* remove duplicated ctx/model functions

ggml-ci

* cuda : print total VRAM used

1 files changed, 17 insertions, 7 deletions

diff --git a/examples/simple/simple.cpp b/examples/simple/simple.cpp
index 1616a4a7..24fb16b7 100644
--- a/examples/simple/simple.cpp
+++ b/examples/simple/simple.cpp
@@ -33,18 +33,28 @@ int main(int argc, char ** argv) {
 
     llama_backend_init(params.numa);
 
-    llama_context_params ctx_params = llama_context_default_params();
+    // initialize the model
 
-    ctx_params.seed  = 1234;
-    ctx_params.n_ctx = 2048;
+    llama_model_params model_params = llama_model_default_params();
 
-    llama_model * model = llama_load_model_from_file(params.model.c_str(), ctx_params);
+    // model_params.n_gpu_layers = 99; // offload all layers to the GPU
+
+    llama_model * model = llama_load_model_from_file(params.model.c_str(), model_params);
 
     if (model == NULL) {
         fprintf(stderr , "%s: error: unable to load model\n" , __func__);
         return 1;
     }
 
+    // initialize the context
+
+    llama_context_params ctx_params = llama_context_default_params();
+
+    ctx_params.seed  = 1234;
+    ctx_params.n_ctx = 2048;
+    ctx_params.n_threads = params.n_threads;
+    ctx_params.n_threads_batch = params.n_threads_batch == -1 ? params.n_threads : params.n_threads_batch;
+
     llama_context * ctx = llama_new_context_with_model(model, ctx_params);
 
     if (ctx == NULL) {
@@ -97,7 +107,7 @@ int main(int argc, char ** argv) {
     // llama_decode will output logits only for the last token of the prompt
     batch.logits[batch.n_tokens - 1] = true;
 
-    if (llama_decode(ctx, batch, params.n_threads) != 0) {
+    if (llama_decode(ctx, batch) != 0) {
         LOG_TEE("%s: llama_decode() failed\n", __func__);
         return 1;
     }
@@ -112,7 +122,7 @@ int main(int argc, char ** argv) {
     while (n_cur <= n_len) {
         // sample the next token
         {
-            auto   n_vocab = llama_n_vocab(ctx);
+            auto   n_vocab = llama_n_vocab(model);
             auto * logits  = llama_get_logits_ith(ctx, batch.n_tokens - 1);
 
             std::vector<llama_token_data> candidates;
@@ -154,7 +164,7 @@ int main(int argc, char ** argv) {
         n_cur += 1;
 
         // evaluate the current batch with the transformer model
-        if (llama_decode(ctx, batch, params.n_threads)) {
+        if (llama_decode(ctx, batch)) {
             fprintf(stderr, "%s : failed to eval, return code %d\n", __func__, 1);
             return 1;
         }