Add Lita, Vila and Vita TRTLLM export (NVIDIA#9734)

* modify vision encoder config

Signed-off-by: Vivian Chen <[email protected]>

* add lita, vila engine build support and fix export api bugs

Signed-off-by: Vivian Chen <[email protected]>

* add run example for vila, lita and vita

Signed-off-by: Vivian Chen <[email protected]>

* couple of changes for exporter

Signed-off-by: Vivian Chen <[email protected]>

* Apply isort and black reformatting

Signed-off-by: xuanzic <[email protected]>

* address code scanning issues

Signed-off-by: Vivian Chen <[email protected]>

* add triton deployment for lita/vila/vita

Signed-off-by: Vivian Chen <[email protected]>

* Apply isort and black reformatting

Signed-off-by: xuanzic <[email protected]>

* fix code scan

Signed-off-by: Vivian Chen <[email protected]>

---------

Signed-off-by: Vivian Chen <[email protected]>
Signed-off-by: Vivian Chen <[email protected]>
Signed-off-by: xuanzic <[email protected]>
Co-authored-by: Vivian Chen <[email protected]>
Co-authored-by: xuanzic <[email protected]>

examples/multimodal/multimodal_llm/neva/conf/neva_export.yaml

@@ -6,10 +6,11 @@ infer:
   max_input_len: 4096
   max_output_len: 256
   max_multimodal_len: 3072
+  vision_max_batch_size: 1 #256 for lita/vita when inference with video dataset
 
 model:
-  type: neva
+  type: neva #neva, video-neva, lita, vila, vita
   precision: bfloat16
   visual_model_path: /path/to/visual.nemo
   llm_model_path: /path/to/llm.nemo
-  llm_model_type: llama
+  llm_model_type: llama 

examples/multimodal/multimodal_llm/neva/neva_export.py

@@ -27,6 +27,7 @@ def main(cfg):
         tensor_parallel_size=cfg.infer.tensor_parallelism,
         max_input_len=cfg.infer.max_input_len,
         max_output_len=cfg.infer.max_output_len,
+        vision_max_batch_size=cfg.infer.vision_max_batch_size,
         max_batch_size=cfg.infer.max_batch_size,
         max_multimodal_len=cfg.infer.max_multimodal_len,
         dtype=cfg.model.precision,

nemo/collections/multimodal/models/multimodal_llm/neva/neva_model.py

@@ -470,11 +470,10 @@ def __init__(
     def create_vision_encoder_and_processor(self, mm_cfg):
         # Initialize vision encoder and freeze it
         if mm_cfg.vision_encoder.get("from_hf", False):
-            if (
-                "clip" in mm_cfg.vision_encoder.from_pretrained
-                or "vit" in mm_cfg.vision_encoder.from_pretrained
-                or "clip" in mm_cfg.vision_encoder.get("model_type", "")
-            ):
+            from transformers import AutoConfig
+
+            config = AutoConfig.from_pretrained(mm_cfg.vision_encoder.from_pretrained)
+            if config.architectures[0] == "CLIPVisionModel":
                 vision_encoder = CLIPVisionModel.from_pretrained(
                     mm_cfg.vision_encoder.from_pretrained,
                     torch_dtype=torch.bfloat16,
@@ -484,9 +483,7 @@ def create_vision_encoder_and_processor(self, mm_cfg):
                     for param in vision_encoder.parameters():
                         param.requires_grad = False
                     vision_encoder = vision_encoder.eval()
-            elif "siglip" in mm_cfg.vision_encoder.from_pretrained or "siglip" in mm_cfg.vision_encoder.get(
-                "model_type", ""
-            ):
+            elif config.architectures[0] == "SiglipVisionModel":
                 vision_encoder = SiglipVisionModel.from_pretrained(
                     mm_cfg.vision_encoder.from_pretrained,
                     torch_dtype=torch.bfloat16,

nemo/collections/multimodal/parts/utils.py

@@ -534,17 +534,14 @@ def expand2square(pil_img, background_color):
 
 def create_image_processor(mm_cfg):
     if mm_cfg.vision_encoder.get("from_hf", False):
-        if (
-            "clip" in mm_cfg.vision_encoder.from_pretrained
-            or "vit" in mm_cfg.vision_encoder.from_pretrained
-            or "clip" in mm_cfg.vision_encoder.get("model_type", "")
-        ):
+        from transformers import AutoConfig
+
+        config = AutoConfig.from_pretrained(mm_cfg.vision_encoder.from_pretrained)
+        if config.architectures[0] == "CLIPVisionModel":
             image_processor = CLIPImageProcessor.from_pretrained(
                 mm_cfg.vision_encoder.from_pretrained, torch_dtype=torch.bfloat16
             )
-        elif "siglip" in mm_cfg.vision_encoder.from_pretrained or "siglip" in mm_cfg.vision_encoder.get(
-            "model_type", ""
-        ):
+        elif config.architectures[0] == "SiglipVisionModel":
             image_processor = SiglipImageProcessor.from_pretrained(
                 mm_cfg.vision_encoder.from_pretrained, torch_dtype=torch.bfloat16
             )

nemo/deploy/multimodal/query_multimodal.py

@@ -56,12 +56,31 @@ def setup_media(self, input_media):
             vr = VideoReader(input_media)
             frames = [f.asnumpy() for f in vr]
             return np.array(frames)
-        elif self.model_type == "neva":
+        elif self.model_type == "lita" or self.model_type == "vita":
+            vr = VideoReader(input_media)
+            frames = [f.asnumpy() for f in vr]
+            subsample_len = self.frame_len(frames)
+            sub_frames = self.get_subsampled_frames(frames, subsample_len)
+            return np.array(sub_frames)
+        elif self.model_type == "neva" or self.model_type == "vila":
             media = Image.open(input_media).convert('RGB')
             return np.expand_dims(np.array(media), axis=0)
         else:
             raise RuntimeError(f"Invalid model type {self.model_type}")
 
+    def frame_len(self, frames):
+        max_frames = 256
+        if len(frames) <= max_frames:
+            return len(frames)
+        else:
+            subsample = int(np.ceil(float(len(frames)) / max_frames))
+            return int(np.round(float(len(frames)) / subsample))
+
+    def get_subsampled_frames(self, frames, subsample_len):
+        idx = np.round(np.linspace(0, len(frames) - 1, subsample_len)).astype(int)
+        sub_frames = [frames[i] for i in idx]
+        return sub_frames
+
     def query(
         self,
         input_text,

nemo/export/multimodal/build.py

@@ -17,6 +17,7 @@
 import shutil
 import tarfile
 import tempfile
+from pathlib import Path
 from time import time
 
 import tensorrt as trt
@@ -37,18 +38,19 @@ def build_trtllm_engine(
     llm_checkpoint_path: str = None,
     model_type: str = "neva",
     llm_model_type: str = "llama",
-    tensor_parallel_size: int = 1,
+    tensor_parallelism_size: int = 1,
     max_input_len: int = 256,
     max_output_len: int = 256,
     max_batch_size: int = 1,
     max_multimodal_len: int = 1024,
     dtype: str = "bfloat16",
 ):
     trt_llm_exporter = TensorRTLLM(model_dir=model_dir, load_model=False)
+    visual_checkpoint_model = ['neva', 'lita', 'vila', 'vita']
     trt_llm_exporter.export(
-        nemo_checkpoint_path=visual_checkpoint_path if model_type == "neva" else llm_checkpoint_path,
+        nemo_checkpoint_path=visual_checkpoint_path if model_type in visual_checkpoint_model else llm_checkpoint_path,
         model_type=llm_model_type,
-        tensor_parallel_size=tensor_parallel_size,
+        tensor_parallelism_size=tensor_parallelism_size,
         max_input_len=max_input_len,
         max_output_len=max_output_len,
         max_batch_size=max_batch_size,
@@ -75,12 +77,24 @@ def export_visual_wrapper_onnx(
 
 
 def build_trt_engine(
-    model_type, input_sizes, output_dir, max_batch_size, dtype=torch.bfloat16, image_size=None, num_frames=None
+    model_type,
+    input_sizes,
+    output_dir,
+    vision_max_batch_size,
+    dtype=torch.bfloat16,
+    image_size=None,
+    num_frames=None,
+    nemo_config=None,
 ):
     part_name = 'visual_encoder'
     onnx_file = '%s/onnx/%s.onnx' % (output_dir, part_name)
     engine_file = '%s/%s.engine' % (output_dir, part_name)
     config_file = '%s/%s' % (output_dir, "config.json")
+    nemo_config_file = '%s/%s' % (output_dir, "nemo_config.yaml")
+
+    with open(nemo_config_file, 'w') as f:
+        yaml.dump(nemo_config, f)
+
     logger.log(trt.Logger.INFO, "Building TRT engine for %s" % part_name)
 
     builder = trt.Builder(logger)
@@ -110,8 +124,8 @@ def build_trt_engine(
 
     nBS = -1
     nMinBS = 1
-    nOptBS = max(nMinBS, int(max_batch_size / 2))
-    nMaxBS = max_batch_size
+    nOptBS = max(nMinBS, int(vision_max_batch_size / 2))
+    nMaxBS = vision_max_batch_size
 
     inputT = network.get_input(0)
 
@@ -145,17 +159,41 @@ def build_trt_engine(
 
 
 def build_neva_engine(
+    model_type: str,
     model_dir: str,
     visual_checkpoint_path: str,
-    max_batch_size: int = 1,
+    vision_max_batch_size: int = 1,
 ):
     device = torch.device("cuda") if torch.cuda.is_available() else "cpu"
     # extract NeMo checkpoint
     with tempfile.TemporaryDirectory() as temp:
-        mp0_weights, nemo_config, _ = load_nemo_model(visual_checkpoint_path, temp)
+        temp_path = Path(temp)
+        mp0_weights, nemo_config, _ = load_nemo_model(visual_checkpoint_path, temp_path)
 
     vision_config = nemo_config["mm_cfg"]["vision_encoder"]
 
+    class DownSampleBlock(torch.nn.Module):
+        def forward(self, x):
+            vit_embeds = x
+            h = w = int(vit_embeds.shape[1] ** 0.5)
+            vit_embeds = vit_embeds.reshape(vit_embeds.shape[0], h, w, -1)
+            vit_embeds = self.flat_square(vit_embeds)
+            vit_embeds = vit_embeds.reshape(vit_embeds.shape[0], -1, vit_embeds.shape[-1])
+            return vit_embeds
+
+        def flat_square(self, x):
+            n, w, h, c = x.size()
+            if w % 2 == 1:
+                x = torch.cat([x, torch.zeros((n, 1, h, c), dtype=x.dtype).to(x.device)], dim=1).contiguous()
+                n, w, h, c = x.size()
+            if h % 2 == 1:
+                x = torch.cat([x, torch.zeros((n, w, 1, c), dtype=x.dtype).to(x.device)], dim=2).contiguous()
+                n, w, h, c = x.size()
+            x = x.view(n, w, int(h / 2), int(c * 2))
+            x = x.permute(0, 2, 1, 3).contiguous()
+            x = x.view(n, int(h / 2), int(w / 2), int(c * 4))
+            return x
+
     class VisionEncoderWrapper(torch.nn.Module):
 
         def __init__(self, encoder, connector):
@@ -166,7 +204,6 @@ def __init__(self, encoder, connector):
         def forward(self, images):
             vision_x = self.encoder(pixel_values=images, output_hidden_states=True)
             vision_x = vision_x.hidden_states[-2]
-            vision_x = vision_x[:, 1:]
             vision_x = self.connector(vision_x)
             return vision_x
 
@@ -178,44 +215,82 @@ def forward(self, images):
     dtype = hf_config.torch_dtype
 
     # connector
-    assert nemo_config["mm_cfg"]["mm_mlp_adapter_type"] == "mlp2x_gelu"
-    vision_connector = torch.nn.Sequential(
-        torch.nn.Linear(vision_config["hidden_size"], nemo_config["hidden_size"], bias=True),
-        torch.nn.GELU(),
-        torch.nn.Linear(nemo_config["hidden_size"], nemo_config["hidden_size"], bias=True),
-    ).to(dtype=dtype)
-
-    key_prefix = "model.embedding.word_embeddings.adapter_layer.mm_projector_adapter.mm_projector"
-    for layer in range(0, 3, 2):
-        vision_connector[layer].load_state_dict(
+    if nemo_config["mm_cfg"]["mm_mlp_adapter_type"] == "mlp2x_gelu":
+        vision_connector = torch.nn.Sequential(
+            torch.nn.Linear(vision_config["hidden_size"], nemo_config["hidden_size"], bias=True),
+            torch.nn.GELU(),
+            torch.nn.Linear(nemo_config["hidden_size"], nemo_config["hidden_size"], bias=True),
+        ).to(dtype=dtype)
+
+        key_prefix = "model.embedding.word_embeddings.adapter_layer.mm_projector_adapter.mm_projector"
+        for layer in range(0, 3, 2):
+            vision_connector[layer].load_state_dict(
+                {
+                    'weight': mp0_weights[f"{key_prefix}.{layer}.weight"].to(dtype),
+                    'bias': mp0_weights[f"{key_prefix}.{layer}.bias"].to(dtype),
+                }
+            )
+    elif nemo_config["mm_cfg"]["mm_mlp_adapter_type"] == "linear":
+        vision_connector = torch.nn.Linear(vision_config["hidden_size"], nemo_config["hidden_size"], bias=True)
+        key_prefix = "model.embedding.word_embeddings.adapter_layer.mm_projector_adapter.mm_projector"
+        vision_connector.load_state_dict(
             {
-                'weight': mp0_weights[f"{key_prefix}.{layer}.weight"].to(dtype),
-                'bias': mp0_weights[f"{key_prefix}.{layer}.bias"].to(dtype),
+                'weight': mp0_weights[f"{key_prefix}.weight"].to(dtype),
+                'bias': mp0_weights[f"{key_prefix}.bias"].to(dtype),
             }
         )
+    elif nemo_config["mm_cfg"]["mm_mlp_adapter_type"] == "mlp_downsample":
+        vision_connector = torch.nn.Sequential(
+            DownSampleBlock(),
+            torch.nn.LayerNorm(vision_config["hidden_size"] * 4),
+            torch.nn.Linear(vision_config["hidden_size"] * 4, nemo_config["hidden_size"], bias=True),
+            torch.nn.GELU(),
+            torch.nn.Linear(nemo_config["hidden_size"], nemo_config["hidden_size"], bias=True),
+        ).to(dtype=dtype)
+        key_prefix = "model.embedding.word_embeddings.adapter_layer.mm_projector_adapter.mm_projector"
+        for layer in [1, 2, 4]:
+            vision_connector[layer].load_state_dict(
+                {
+                    'weight': mp0_weights[f"{key_prefix}.{layer}.weight"].to(dtype),
+                    'bias': mp0_weights[f"{key_prefix}.{layer}.bias"].to(dtype),
+                }
+            )
+
+    else:
+        raise ValueError(f"Unknown projector type: {nemo_config['mm_cfg']['mm_mlp_adapter_type']}")
 
     # export the whole wrapper
+    lita_num_frames = None
     wrapper = VisionEncoderWrapper(vision_encoder, vision_connector).to(device, dtype)
-    image_size = hf_config.vision_config.image_size
+    if model_type == "lita" or model_type == "vila":
+        image_size = hf_config.image_size
+        if model_type == "lita":
+            lita_num_frames = nemo_config['mm_cfg']['lita']['sample_frames']
+    else:
+        image_size = hf_config.vision_config.image_size
+        if model_type == "vita":
+            lita_num_frames = nemo_config['mm_cfg']['lita']['sample_frames']
     dummy_image = torch.empty(
         1, 3, image_size, image_size, dtype=dtype, device=device
     )  # dummy image shape [B, C, H, W]
 
     export_visual_wrapper_onnx(wrapper, dummy_image, model_dir)
     build_trt_engine(
-        "neva",
+        model_type,
         [3, image_size, image_size],
         model_dir,
-        max_batch_size,
+        vision_max_batch_size,
         dtype,
         image_size=image_size,
+        num_frames=lita_num_frames if model_type == "lita" or model_type == 'vita' else None,
+        nemo_config=nemo_config,
     )
 
 
 def build_video_neva_engine(
     model_dir: str,
     visual_checkpoint_path: str,
-    max_batch_size: int = 1,
+    vision_max_batch_size: int = 1,
 ):
     device = torch.device("cuda") if torch.cuda.is_available() else "cpu"
     # extract NeMo checkpoint
@@ -279,7 +354,7 @@ def forward(self, images):
         "video-neva",
         [num_frames, 3, image_size, image_size],  # [num_frames, 3, H, W]
         model_dir,
-        max_batch_size,
+        vision_max_batch_size,
         dtype,
         image_size=image_size,
         num_frames=num_frames,
@@ -290,11 +365,12 @@ def build_visual_engine(
     model_dir: str,
     visual_checkpoint_path: str,
     model_type: str = "neva",
-    max_batch_size: int = 1,
+    vision_max_batch_size: int = 1,
 ):
-    if model_type == "neva":
-        build_neva_engine(model_dir, visual_checkpoint_path, max_batch_size)
+    model_list = ['neva', 'lita', 'vila', 'vita']
+    if model_type in model_list:
+        build_neva_engine(model_type, model_dir, visual_checkpoint_path, vision_max_batch_size)
     elif model_type == "video-neva":
-        build_video_neva_engine(model_dir, visual_checkpoint_path, max_batch_size)
+        build_video_neva_engine(model_dir, visual_checkpoint_path, vision_max_batch_size)
     else:
         raise RuntimeError(f"Invalid model type {model_type}")