Add support for various softmax normalization options (vllm-project#420)

Supporting PR for HabanaAI/vllm-hpu-extension#14

Author: madamczyk-intel

requirements-hpu.txt

@@ -8,4 +8,4 @@ pandas
 tabulate
 setuptools>=61
 setuptools-scm>=8
-vllm-hpu-extension @ git+https://github.com/HabanaAI/vllm-hpu-extension.git@fd7f2e6
+vllm-hpu-extension @ git+https://github.com/HabanaAI/vllm-hpu-extension.git@c2801bb

vllm/attention/backends/hpu_attn.py

@@ -223,6 +223,7 @@ def forward(
                 block_mapping=attn_metadata.block_mapping,
                 block_bias=attn_metadata.attn_bias,
                 block_scales=attn_metadata.block_scales,
+                block_groups=attn_metadata.block_groups,
                 scale=self.scale,
                 matmul_qk_op=self.matmul_qk,
                 matmul_av_op=self.matmul_av,

vllm/attention/ops/hpu_paged_attn.py

@@ -21,6 +21,7 @@ class HPUPagedAttentionMetadata:
     block_indices: Optional[torch.Tensor]
     block_offsets: Optional[torch.Tensor]
     block_scales: Optional[torch.Tensor]
+    block_groups: Optional[torch.Tensor]
 
 
 class HPUPagedAttention:

vllm/worker/hpu_model_runner.py

@@ -907,6 +907,7 @@ def _prepare_prompt(
             block_indices=block_indices,
             block_offsets=block_offsets,
             block_scales=None,
+            block_groups=None,
             attn_bias=None,
             seq_lens_tensor=seq_lens_tensor,
             num_prefills=real_num_seqs,
@@ -1028,6 +1029,8 @@ def _prepare_decode(
             len(block_list),
             self.bucketing_global_state.decode_block_bucket_cfg)
         block_list = pad_list(block_list, block_bucket_size, _PAD_BLOCK_ID)
+        block_groups = pad_list(block_mapping, block_bucket_size,
+                                len(block_tables))
         block_mapping = pad_list(block_mapping, block_bucket_size, -1)
         block_usage = pad_list(block_usage, block_bucket_size, 1)
         block_scales = pad_list(block_scales, block_bucket_size, 0.0)
@@ -1038,6 +1041,9 @@ def _prepare_decode(
         block_mapping = torch.tensor(block_mapping,
                                      dtype=torch.long,
                                      device=self.device)
+        block_groups = torch.tensor(block_groups,
+                                    dtype=torch.long,
+                                    device=self.device)
         block_usage = torch.tensor(block_usage,
                                    dtype=self.model_config.dtype,
                                    device=self.device)
@@ -1060,6 +1066,7 @@ def _prepare_decode(
             block_indices=block_indices,
             block_offsets=block_offsets,
             block_scales=block_scales,
+            block_groups=block_groups,
             attn_bias=None,
             seq_lens_tensor=None,
             num_prefills=0,
@@ -1271,7 +1278,7 @@ def trim_attn_metadata(self, metadata: AttentionMetadata) -> object:
         attention_metadata = subtuple(metadata, 'TrimmedAttentionMetadata', [
             'attn_bias', 'seq_lens_tensor', 'block_list', 'block_mapping',
             'block_usage', 'slot_mapping', 'is_prompt', 'block_indices',
-            'block_offsets', 'block_scales'
+            'block_offsets', 'block_scales', 'block_groups'
         ])
         return attention_metadata