address lucidrains/audiolm-pytorch#279

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "vector-quantize-pytorch"
-version = "1.18.5"
+version = "1.18.6"
 description = "Vector Quantization - Pytorch"
 authors = [
     { name = "Phil Wang", email = "[email protected]" }

vector_quantize_pytorch/residual_fsq.py

@@ -1,6 +1,6 @@
 import random
 from math import log2
-from functools import partial
+from functools import partial, cache
 
 from typing import List
 
@@ -9,6 +9,7 @@
 from torch.nn import Module, ModuleList
 import torch.nn.functional as F
 from torch.amp import autocast
+import torch.distributed as dist
 
 from vector_quantize_pytorch.finite_scalar_quantization import FSQ
 
@@ -30,6 +31,12 @@ def default(val, d):
 def round_up_multiple(num, mult):
     return ceil(num / mult) * mult
 
+# distributed helpers
+
+@cache
+def is_distributed():
+    return dist.is_initialized() and dist.get_world_size() > 1
+
 # main class
 
 class ResidualFSQ(Module):
@@ -167,7 +174,19 @@ def forward(
         # also prepare null indices
 
         if should_quantize_dropout:
-            rand = random.Random(rand_quantize_dropout_fixed_seed) if exists(rand_quantize_dropout_fixed_seed) else random
+
+            if exists(rand_quantize_dropout_fixed_seed):
+                # seed is manually passed in
+                rand = random.Random(rand_quantize_dropout_fixed_seed)
+
+            elif is_distributed():
+                # in distributed environment, synchronize a random seed value if not given
+                t = torch.tensor(random.randrange(10_000), device = device)
+                dropout_seed = dist.all_reduce(t).item()
+                rand = random.Random(dropout_seed)
+
+            else:
+                rand = random
 
             rand_quantize_dropout_index = rand.randrange(self.quantize_dropout_cutoff_index, num_quant)
 

vector_quantize_pytorch/residual_lfq.py

@@ -1,12 +1,13 @@
 import random
 from math import log2
-from functools import partial
+from functools import partial, cache
 
 import torch
 from torch import nn
 from torch.nn import Module, ModuleList
 import torch.nn.functional as F
 from torch.amp import autocast
+import torch.distributed as dist
 
 from vector_quantize_pytorch.lookup_free_quantization import LFQ
 
@@ -25,6 +26,12 @@ def default(val, d):
 def round_up_multiple(num, mult):
     return ceil(num / mult) * mult
 
+# distributed helpers
+
+@cache
+def is_distributed():
+    return dist.is_initialized() and dist.get_world_size() > 1
+
 # main class
 
 class ResidualLFQ(Module):
@@ -144,7 +151,19 @@ def forward(
         # also prepare null indices and loss
 
         if should_quantize_dropout:
-            rand = random.Random(rand_quantize_dropout_fixed_seed) if exists(rand_quantize_dropout_fixed_seed) else random
+
+            if exists(rand_quantize_dropout_fixed_seed):
+                # seed is manually passed in
+                rand = random.Random(rand_quantize_dropout_fixed_seed)
+
+            elif is_distributed():
+                # in distributed environment, synchronize a random seed value if not given
+                t = torch.tensor(random.randrange(10_000), device = device)
+                dropout_seed = dist.all_reduce(t).item()
+                rand = random.Random(dropout_seed)
+
+            else:
+                rand = random
 
             rand_quantize_dropout_index = rand.randrange(self.quantize_dropout_cutoff_index, num_quant)