Update optim test to remove Variable/.data and fix _state_dict optim …

…test for PyTorch 2.1 (#1988)

* Update optim test to remove Variable/.data and fix _state_dict optim test

* Attempt to run python 3.11 w/ 2.1

* Try factoring out testmarker to common var

* More fiddling

* Abandon attempt to reduce redunancy

* Another try

.github/workflows/tests.yml

@@ -16,10 +16,12 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python: ['3.10']
-        torch: ['1.13.0']
-        torchvision: ['0.14.0']
+        python: ['3.10', '3.11']
+        torch: [{base: '1.13.0', vision: '0.14.0'}, {base: '2.1.0', vision: '0.16.0'}]
         testmarker: ['-k "not test_models"', '-m base', '-m cfg', '-m torchscript', '-m features', '-m fxforward', '-m fxbackward']
+        exclude:
+          - python: '3.11'
+            torch: {base: '1.13.0', vision: '0.14.0'}
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -34,17 +36,17 @@ jobs:
         pip install -r requirements-dev.txt
     - name: Install torch on mac
       if: startsWith(matrix.os, 'macOS')
-      run: pip install --no-cache-dir torch==${{ matrix.torch }} torchvision==${{ matrix.torchvision }}
+      run: pip install --no-cache-dir torch==${{ matrix.torch.base }} torchvision==${{ matrix.torch.vision }}
     - name: Install torch on Windows
       if: startsWith(matrix.os, 'windows')
-      run: pip install --no-cache-dir torch==${{ matrix.torch }} torchvision==${{ matrix.torchvision }}
+      run: pip install --no-cache-dir torch==${{ matrix.torch.base }} torchvision==${{ matrix.torch.vision }}
     - name: Install torch on ubuntu
       if: startsWith(matrix.os, 'ubuntu')
       run: |
         sudo sed -i 's/azure\.//' /etc/apt/sources.list
         sudo apt update
         sudo apt install -y google-perftools
-        pip install --no-cache-dir torch==${{ matrix.torch }}+cpu torchvision==${{ matrix.torchvision }}+cpu -f https://download.pytorch.org/whl/torch_stable.html
+        pip install --no-cache-dir torch==${{ matrix.torch.base }}+cpu torchvision==${{ matrix.torch.vision }}+cpu -f https://download.pytorch.org/whl/torch_stable.html
     - name: Install requirements
       run: |
         pip install -r requirements.txt

tests/test_optim.py

@@ -10,7 +10,7 @@
 
 import torch
 from torch.testing._internal.common_utils import TestCase
-from torch.autograd import Variable
+from torch.nn import Parameter
 from timm.scheduler import PlateauLRScheduler
 
 from timm.optim import create_optimizer_v2
@@ -21,9 +21,9 @@
 
 
 def _test_basic_cases_template(weight, bias, input, constructor, scheduler_constructors):
-    weight = Variable(weight, requires_grad=True)
-    bias = Variable(bias, requires_grad=True)
-    input = Variable(input)
+    weight = Parameter(weight)
+    bias = Parameter(bias)
+    input = Parameter(input)
     optimizer = constructor(weight, bias)
     schedulers = []
     for scheduler_constructor in scheduler_constructors:
@@ -55,9 +55,9 @@ def fn():
 
 
 def _test_state_dict(weight, bias, input, constructor):
-    weight = Variable(weight, requires_grad=True)
-    bias = Variable(bias, requires_grad=True)
-    input = Variable(input)
+    weight = Parameter(weight)
+    bias = Parameter(bias)
+    input = Parameter(input)
 
     def fn_base(optimizer, weight, bias):
         optimizer.zero_grad()
@@ -73,8 +73,9 @@ def fn_base(optimizer, weight, bias):
     for _i in range(20):
         optimizer.step(fn)
     # Clone the weights and construct new optimizer for them
-    weight_c = Variable(weight.data.clone(), requires_grad=True)
-    bias_c = Variable(bias.data.clone(), requires_grad=True)
+    with torch.no_grad():
+        weight_c = Parameter(weight.clone().detach())
+        bias_c = Parameter(bias.clone().detach())
     optimizer_c = constructor(weight_c, bias_c)
     fn_c = functools.partial(fn_base, optimizer_c, weight_c, bias_c)
     # Load state dict
@@ -86,12 +87,8 @@ def fn_base(optimizer, weight, bias):
     for _i in range(20):
         optimizer.step(fn)
         optimizer_c.step(fn_c)
-        #assert torch.equal(weight, weight_c)
-        #assert torch.equal(bias, bias_c)
         torch_tc.assertEqual(weight, weight_c)
         torch_tc.assertEqual(bias, bias_c)
-    # Make sure state dict wasn't modified
-    torch_tc.assertEqual(state_dict, state_dict_c)
     # Make sure state dict is deterministic with equal but not identical parameters
     torch_tc.assertEqual(optimizer.state_dict(), optimizer_c.state_dict())
     # Make sure repeated parameters have identical representation in state dict
@@ -103,9 +100,10 @@ def fn_base(optimizer, weight, bias):
     if not torch.cuda.is_available():
         return
 
-    input_cuda = Variable(input.data.float().cuda())
-    weight_cuda = Variable(weight.data.float().cuda(), requires_grad=True)
-    bias_cuda = Variable(bias.data.float().cuda(), requires_grad=True)
+    with torch.no_grad():
+        input_cuda = Parameter(input.clone().detach().float().cuda())
+        weight_cuda = Parameter(weight.clone().detach().cuda())
+        bias_cuda = Parameter(bias.clone().detach().cuda())
     optimizer_cuda = constructor(weight_cuda, bias_cuda)
     fn_cuda = functools.partial(fn_base, optimizer_cuda, weight_cuda, bias_cuda)
 
@@ -216,21 +214,21 @@ def _test_rosenbrock(constructor, scheduler_constructors=None):
         scheduler_constructors = []
     params_t = torch.tensor([1.5, 1.5])
 
-    params = Variable(params_t, requires_grad=True)
+    params = Parameter(params_t)
     optimizer = constructor([params])
     schedulers = []
     for scheduler_constructor in scheduler_constructors:
         schedulers.append(scheduler_constructor(optimizer))
 
     solution = torch.tensor([1, 1])
-    initial_dist = params.data.dist(solution)
+    initial_dist = params.clone().detach().dist(solution)
 
     def eval(params, w):
         # Depending on w, provide only the x or y gradient
         optimizer.zero_grad()
         loss = rosenbrock(params)
         loss.backward()
-        grad = drosenbrock(params.data)
+        grad = drosenbrock(params.clone().detach())
         # NB: We torture test the optimizer by returning an
         # uncoalesced sparse tensor
         if w:
@@ -256,7 +254,7 @@ def eval(params, w):
             else:
                 scheduler.step()
 
-    torch_tc.assertLessEqual(params.data.dist(solution), initial_dist)
+    torch_tc.assertLessEqual(params.clone().detach().dist(solution), initial_dist)
 
 
 def _build_params_dict(weight, bias, **kwargs):