Add support for Llama3-70b (#101)

* Add support for Llama3-70b

* Fix unit tests

* assert model_name is one of llama-2 or llama-3 for weight sharding

* Fix lint

* Revert separate shardings for llama-2 and llama-3

* Fix lint

Author: bhavya01

README.md

@@ -98,6 +98,11 @@ python run_interactive.py --size=13b --model_name=$model_name --batch_size=64 --
 python run_interactive.py --size=8b --model_name=$model_name --batch_size=128 --max_cache_length=2048 --quantize_weights=$quantize --quantize_type=$quantize_type --quantize_kv_cache=$quantize --checkpoint_path=$output_ckpt_dir --tokenizer_path=$tokenizer_path --sharding_config=default_shardings/llama.yaml
 ```
 
+## Llama-3 70b
+```bash
+python run_interactive.py --size=70b --model_name=$model_name --batch_size=8 --max_cache_length=2048 --quantize_weights=$quantize --quantize_type=$quantize_type --quantize_kv_cache=$quantize --checkpoint_path=$output_ckpt_dir --tokenizer_path=$tokenizer_path --sharding_config=default_shardings/llama.yaml
+```
+
 ## Gemma 7b
 ```bash
 python run_interactive.py --model_name=$model_name --size=7b --batch_size=64 --max_cache_length=2048 --quantize_weights=$quantize --quantize_type=$quantize_type --quantize_kv_cache=$quantize --checkpoint_path=$output_ckpt_dir --tokenizer_path=$tokenizer_path --sharding_config=default_shardings/$model_name.yaml

convert_checkpoints.py

@@ -186,20 +186,21 @@ def _merge_llama_weights(
         f"{len(tensors)} shards (shape = {tensors[0].shape}) for {key})"
     )
     state_dict_for_key = {}
-    weight_sharding_type = (
-        llama_model.Transformer.get_weight_sharding_type().items()
-    )
+
+    weight_sharding_type = llama_model.Transformer.get_weight_sharding_type(
+        model_name=FLAGS.model_name
+    ).items()
     for pattern, kind in weight_sharding_type:
       if not key.endswith(pattern):
         continue
       with torch.no_grad():
         if kind in ("ParallelEmbedding", "RowParallelLinear"):
           state_dict_for_key[key] = torch.cat(tensors, 1)
-        elif kind == "ColumnParallelLinear":
+        elif kind in ("ColumnParallelLinear", "VocabParallelEmbedding"):
           state_dict_for_key[key] = torch.cat(tensors, 0)
         else:
           if not all(
-              torch.allclose(tensors[0], tensor, atol=1e-6)
+              torch.allclose(tensors[0], tensor, atol=1e-2)
               for tensor in tensors[1:]
           ):
             raise ValueError(

jetstream_pt/third_party/llama/model_args.py

@@ -90,6 +90,19 @@ def get_arg(
         "norm_eps": 1e-05,
         "rope_theta": 500000.0,
     }
+  elif model_name == "llama-3-70b":
+    data = {
+        "dim": 8192,
+        "ffn_dim_multiplier": 1.3,
+        "multiple_of": 4096,
+        "n_heads": 64,
+        "n_kv_heads": 8,
+        "n_layers": 80,
+        "norm_eps": 1e-05,
+        "vocab_size": 128256,
+        "rope_theta": 500000.0,
+    }
+
   return ModelArgs(
       max_seq_len=seqlen,
       max_batch_size=batch_size,

jetstream_pt/third_party/llama/model_exportable.py

@@ -259,13 +259,17 @@ def get_quantized_embedding_weight_to_scaler_map():
     }
 
   @staticmethod
-  def get_weight_sharding_type():
+  def get_weight_sharding_type(model_name: str = ""):
     # ParallelEmbedding is col partitioned across the shards.
+    # VocalParallelEmbedding is row partitioned across the shards.
     # ColumnParallelLinear is row partitioned across shards due to transpose.
     # RowParallelLinear is col partitioned across shards due to transpose.
     # None is no partitioning and tensor should be identical across shards
-    return {
-        "tok_embeddings.weight": "ParallelEmbedding",
+    expected_model_names = ("llama-2", "llama-3")
+    assert (
+        model_name in expected_model_names
+    ), f"Expected model_name to one of {expected_model_names}"
+    sharding_dict = {
         "rope.freqs": None,
         "attention.wq.weight": "ColumnParallelLinear",
         "attention.wk.weight": "ColumnParallelLinear",
@@ -279,3 +283,8 @@ def get_weight_sharding_type():
         "norm.weight": None,
         "output.weight": "ColumnParallelLinear",
     }
+    if model_name == "llama-2":
+      sharding_dict["tok_embeddings.weight"] = "ParallelEmbedding"
+    elif model_name == "llama-3":
+      sharding_dict["tok_embeddings.weight"] = "VocabParallelEmbedding"
+    return sharding_dict