Make template code use less memory during inference

openfold/config.py

@@ -231,8 +231,7 @@ config = mlc.ConfigDict(
         # Recurring FieldReferences that can be changed globally here
         "globals": {
             "blocks_per_ckpt": blocks_per_ckpt,
-            "train_chunk_size": None,
-            "eval_chunk_size": chunk_size,
+            "chunk_size": chunk_size,
             "c_z": c_z,
             "c_m": c_m,
             "c_t": c_t,

openfold/data/data_pipeline.py

@@ -210,7 +210,9 @@ class AlignmentRunner:
         )
 
         self.hhsearch_pdb70_runner = hhsearch.HHSearch(
-            binary_path=hhsearch_binary_path, databases=[pdb70_database_path]
+            binary_path=hhsearch_binary_path,
+            databases=[pdb70_database_path],
+            n_cpu=no_cpus,
         )
         self.uniref_max_hits = uniref_max_hits
         self.mgnify_max_hits = mgnify_max_hits

openfold/model/model.py

@@ -106,7 +106,7 @@ class AlphaFold(nn.Module):
 
         self.config = config
 
-    def embed_templates(self, batch, z, pair_mask, templ_dim, chunk_size): 
+    def embed_templates(self, batch, z, pair_mask, templ_dim): 
         # Embed the templates one at a time (with a poor man's vmap)
         template_embeds = []
         n_templ = batch["template_aatype"].shape[templ_dim]
@@ -146,18 +146,20 @@ class AlphaFold(nn.Module):
             template_embeds,
         )
 
-        # [*, N, N, C_z]
+        # [*, S_t, N, N, C_z]
         t = self.template_pair_stack(
             template_embeds["pair"], 
             pair_mask.unsqueeze(-3), 
-            chunk_size=chunk_size,
+            chunk_size=self.globals.chunk_size,
             _mask_trans=self.config._mask_trans,
         )
+
+        # [*, N, N, C_z]
         t = self.template_pointwise_att(
             t, 
             z, 
             template_mask=batch["template_mask"],
-            chunk_size=chunk_size,
+            chunk_size=self.globals.chunk_size,
         )
         t = t * (torch.sum(batch["template_mask"]) > 0)
 
@@ -170,12 +172,6 @@ class AlphaFold(nn.Module):
         return ret
 
     def iteration(self, feats, m_1_prev, z_prev, x_prev, _recycle=True):
-        # Establish constants
-        chunk_size = (
-            self.globals.train_chunk_size 
-            if self.training else self.globals.eval_chunk_size
-        )
-
         # Primary output dictionary
         outputs = {}
 
@@ -251,7 +247,6 @@ class AlphaFold(nn.Module):
                     z,
                     pair_mask,
                     no_batch_dims,
-                    chunk_size,
                 )
 
                 # [*, N, N, C_z]
@@ -281,7 +276,7 @@ class AlphaFold(nn.Module):
                 a,
                 z,
                 msa_mask=feats["extra_msa_mask"],
-                chunk_size=chunk_size,
+                chunk_size=self.globals.chunk_size,
                 pair_mask=pair_mask,
                 _mask_trans=self.config._mask_trans,
             )
@@ -295,7 +290,7 @@ class AlphaFold(nn.Module):
             z,
             msa_mask=msa_mask,
             pair_mask=pair_mask,
-            chunk_size=chunk_size,
+            chunk_size=self.globals.chunk_size,
             _mask_trans=self.config._mask_trans,
         )
 

openfold/model/template.py

@@ -174,17 +174,43 @@ class TemplatePairStackBlock(nn.Module):
         )
 
     def forward(self, z, mask, chunk_size, _mask_trans=True):
-        z = z + self.dropout_row(
-            self.tri_att_start(z, chunk_size=chunk_size, mask=mask)
-        )
-        z = z + self.dropout_col(
-            self.tri_att_end(z, chunk_size=chunk_size, mask=mask)
-        )
-        z = z + self.dropout_row(self.tri_mul_out(z, mask=mask))
-        z = z + self.dropout_row(self.tri_mul_in(z, mask=mask))
-        z = z + self.pair_transition(
-            z, chunk_size=chunk_size, mask=mask if _mask_trans else None
-        )
+        for templ_idx in range(z.shape[-4]):
+            # Select a single template at a time
+            single = z[..., templ_idx:templ_idx+1, :, :, :]
+            single_mask = mask[..., templ_idx:templ_idx+1, :, :]
+
+            single = single + self.dropout_row(
+                self.tri_att_start(
+                    single,
+                    chunk_size=chunk_size,
+                    mask=single_mask
+                )
+            )
+            single = single + self.dropout_col(
+                self.tri_att_end(
+                    single,
+                    chunk_size=chunk_size,
+                    mask=single_mask
+                )
+            )
+            single = single + self.dropout_row(
+                self.tri_mul_out(
+                    single,
+                    mask=single_mask
+                )
+            )
+            single = single + self.dropout_row(
+                self.tri_mul_in(
+                    single,
+                    mask=single_mask
+                )
+            )
+            single = single + self.pair_transition(
+                single,
+                chunk_size=chunk_size,
+                mask=single_mask if _mask_trans else None
+            )
+            z[..., templ_idx:templ_idx+1, :, :, :] = single
 
         return z
 
@@ -254,12 +280,17 @@ class TemplatePairStack(nn.Module):
         """
         Args:
             t:
-                [*, N_res, N_res, C_t] template embedding
+                [*, N_templ, N_res, N_res, C_t] template embedding
             mask:
-                [*, N_res, N_res] mask
+                [*, N_templ, N_res, N_res] mask
         Returns:
-            [*, N_res, N_res, C_t] template embedding update
+            [*, N_templ, N_res, N_res, C_t] template embedding update
         """
+        if(mask.shape[-3] == 1):
+            expand_idx = list(mask.shape)
+            expand_idx[-3] = t.shape[-4]
+            mask = mask.expand(*expand_idx)
+
         (t,) = checkpoint_blocks(
             blocks=[
                 partial(

tests/test_template.py

@@ -133,8 +133,8 @@ class TestTemplatePairStack(unittest.TestCase):
 
         model = compare_utils.get_global_pretrained_openfold()
         out_repro = model.template_pair_stack(
-            torch.as_tensor(pair_act).cuda(),
-            torch.as_tensor(pair_mask).cuda(),
+            torch.as_tensor(pair_act).unsqueeze(-4).cuda(),
+            torch.as_tensor(pair_mask).unsqueeze(-3).cuda(),
             chunk_size=None,
             _mask_trans=False,
         ).cpu()
@@ -182,7 +182,6 @@ class Template(unittest.TestCase):
             torch.as_tensor(pair_act).cuda(),
             torch.as_tensor(pair_mask).cuda(),
             templ_dim=0,
-            chunk_size=None,
         )
         out_repro = out_repro["template_pair_embedding"]
         out_repro = out_repro.cpu()