(stateless_llama) Use HF model config for some variables. (#354)

Note:
we still need a programmatic solution to getting an appropriate pytree
spec for the state schema.

python/turbine_models/custom_models/stateless_llama.py

@@ -16,7 +16,6 @@
 import safetensors
 
 BATCH_SIZE = 1
-MAX_STEP_SEQ = 4095
 
 import argparse
 
@@ -63,10 +62,14 @@
 )
 
 # TODO (Dan): replace this with a file once I figure out paths on windows exe
-json_schema = """
+json_schema_64 = """
 [1, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}]}]
 """
 
+json_schema_16 = """
+[1, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}, {"type": "builtins.tuple", "context": "null", "children_spec": [{"type": null, "context": null, "children_spec": []}, {"type": null, "context": null, "children_spec": []}]}]}]
+"""
+
 
 def slice_up_to_step(global_pkv, seq_step, heads, hidden_dim):
     all_pkv_tensors = []
@@ -97,13 +100,15 @@ def export_transformer_model(
     streaming_llm=False,
     vmfb_path=None,
 ):
-    state_schema = pytree.treespec_loads(json_schema)
-
     mod = AutoModelForCausalLM.from_pretrained(
         hf_model_name,
         torch_dtype=torch.float,
         token=hf_auth_token,
     )
+    if mod.config.num_attention_heads == 8:
+        state_schema = pytree.treespec_loads(json_schema_16)
+    else:
+        state_schema = pytree.treespec_loads(json_schema_64)
     if streaming_llm:
         enable_llama_pos_shift_attention(mod)
     dtype = torch.float32
@@ -116,9 +121,10 @@ def export_transformer_model(
         token=hf_auth_token,
     )
     # TODO: generate these values instead of magic numbers
-    HEADS = 32
-    HIDDEN_DIM = 128
+    HEADS = mod.config.num_attention_heads
+    HIDDEN_DIM = int(mod.config.hidden_size / HEADS)
     BATCH_SIZE = 1
+    MAX_STEP_SEQ = mod.config.max_position_embeddings - 1
     global_pkv = torch.zeros(
         size=(HEADS * 2, BATCH_SIZE, MAX_STEP_SEQ, HEADS, HIDDEN_DIM),
         dtype=dtype,