Add TPU support for OPT-350M

The 350M model seems to have a different structure than the other ones ???

aiserver.py

@@ -772,7 +772,7 @@ def spRequest(filename):
         tensor = tensor.reshape(
             tpu_mtj_backend.params["cores_per_replica"],
             -1,
-            tpu_mtj_backend.params["d_model"],
+            tpu_mtj_backend.params.get("d_embed", tpu_mtj_backend.params["d_model"]),
         )
         vars.sp = tpu_mtj_backend.shard_xmap(np.float32(tensor))
     else:
@@ -1574,14 +1574,14 @@ else:
             global np
             if 'np' not in globals():
                 import numpy as np
-            tensor = np.zeros((1, tpu_mtj_backend.params["d_model"]), dtype=np.float32)
+            tensor = np.zeros((1, tpu_mtj_backend.params.get("d_embed", tpu_mtj_backend.params["d_model"])), dtype=np.float32)
             rows = tensor.shape[0]
             padding_amount = tpu_mtj_backend.params["seq"] - (tpu_mtj_backend.params["seq"] % -tpu_mtj_backend.params["cores_per_replica"]) - rows
             tensor = np.pad(tensor, ((0, padding_amount), (0, 0)))
             tensor = tensor.reshape(
                 tpu_mtj_backend.params["cores_per_replica"],
                 -1,
-                tpu_mtj_backend.params["d_model"],
+                tpu_mtj_backend.params.get("d_embed", tpu_mtj_backend.params["d_model"]),
             )
             vars.sp = tpu_mtj_backend.shard_xmap(tensor)
         soft_tokens = np.arange(
@@ -1682,7 +1682,7 @@ else:
         loadmodelsettings()
         loadsettings()
         tpu_mtj_backend.load_model(vars.custmodpth, hf_checkpoint=vars.model not in ("TPUMeshTransformerGPTJ", "TPUMeshTransformerGPTNeoX") and vars.use_colab_tpu, **vars.modelconfig)
-        vars.modeldim = int(tpu_mtj_backend.params["d_model"])
+        vars.modeldim = int(tpu_mtj_backend.params.get("d_embed", tpu_mtj_backend.params["d_model"]))
         tokenizer = tpu_mtj_backend.tokenizer
     else:
         loadsettings()

maps/opt.json

@@ -3,13 +3,16 @@
   "mtj_pe": "fixed",
   "mtj_config_map": {
     "do_layer_norm_before": ["do_layer_norm_before", true],
+    "d_embed": "word_embed_proj_dim",
     "d_model": "hidden_size",
     "n_heads": "num_attention_heads",
     "layers": "num_hidden_layers"
   },
   "static_weights": {
     "decoder.embed_tokens.weight": {"mtj": {"module": "embedding_shard/~/linear", "param": "w", "transforms": ["no_transpose", "vocab_pad"]}},
-    "decoder.embed_positions.weight": {"mtj": {"module": "embedding_shard", "param": "pos_embs", "transforms": ["no_transpose", "remove_first_two_rows"]}}
+    "decoder.project_in.weight": {"mtj": {"module": "embedding_shard", "param": "project_in"}},
+    "decoder.embed_positions.weight": {"mtj": {"module": "embedding_shard", "param": "pos_embs", "transforms": ["no_transpose", "remove_first_two_rows"]}},
+    "decoder.project_out.weight": {"mtj": {"module": "projection_shard", "param": "project_out"}}
   },
   "layer_weights": {
     "decoder.layers.{layer}.self_attn.q_proj.weight": {"mtj": {"module": "layer_{layer}/~/linear", "param": "w"}},

tpu_mtj_backend.py

@@ -1054,7 +1054,7 @@ def load_model(path: str, driver_version="tpu_driver0.1_dev20210607", hf_checkpo
         # by the number of TPU cores, and fall back to one core if an even
         # number of TPU cores is not possible.
         for c in (8, 6, 4, 2, 1):
-            if 0 == params["n_heads"] % c == params["d_model"] % c:
+            if 0 == params["n_heads"] % c == params.get("d_embed", params["d_model"]) % c:
                 params["cores_per_replica"] = c
                 break