From f1fe77c083f952e81cf80c0b44611fc6057a7882 Mon Sep 17 00:00:00 2001
From: Jordan Gong <jordan.gong@protonmail.com>
Date: Wed, 6 Jan 2021 22:19:27 +0800
Subject: Add CUDA support

---
 models/auto_encoder.py |  7 ++-----
 models/model.py        | 12 +++++++-----
 test/cuda.py           | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 44 insertions(+), 10 deletions(-)
 create mode 100644 test/cuda.py

diff --git a/models/auto_encoder.py b/models/auto_encoder.py
index eaac2fe..7c1f7ef 100644
--- a/models/auto_encoder.py
+++ b/models/auto_encoder.py
@@ -132,17 +132,14 @@ class AutoEncoder(nn.Module):
         # x_c1_t2 is the frame for later module
         (f_a_c1_t2, f_c_c1_t2, f_p_c1_t2) = self.encoder(x_c1_t2)
 
-        f_a_size, f_c_size, f_p_size = (
-            f_a_c1_t2.size(), f_c_c1_t2.size(), f_p_c1_t2.size()
-        )
         # Decode canonical features for HPM
         x_c_c1_t2 = self.decoder(
-            torch.zeros(f_a_size), f_c_c1_t2, torch.zeros(f_p_size),
+            torch.zeros_like(f_a_c1_t2), f_c_c1_t2, torch.zeros_like(f_p_c1_t2),
             no_trans_conv=True
         )
         # Decode pose features for Part Net
         x_p_c1_t2 = self.decoder(
-            torch.zeros(f_a_size), torch.zeros(f_c_size), f_p_c1_t2
+            torch.zeros_like(f_a_c1_t2), torch.zeros_like(f_c_c1_t2), f_p_c1_t2
         )
 
         if self.training:
diff --git a/models/model.py b/models/model.py
index 3842844..5dc7d97 100644
--- a/models/model.py
+++ b/models/model.py
@@ -75,6 +75,7 @@ class Model:
         hp = self.hp.copy()
         lr, betas = hp.pop('lr', 1e-4), hp.pop('betas', (0.9, 0.999))
         self.rgb_pn = RGBPartNet(self.train_size, self.in_channels, **hp)
+        self.rgb_pn = self.rgb_pn.to(self.device)
         self.optimizer = optim.Adam(self.rgb_pn.parameters(), lr, betas)
         self.scheduler = optim.lr_scheduler.StepLR(self.optimizer, 500, 0.9)
         self.writer = SummaryWriter(self.log_name)
@@ -95,9 +96,10 @@ class Model:
             # Zero the parameter gradients
             self.optimizer.zero_grad()
             # forward + backward + optimize
-            loss, metrics = self.rgb_pn(
-                batch_c1['clip'], batch_c2['clip'], batch_c1['label']
-            )
+            x_c1 = batch_c1['clip'].to(self.device)
+            x_c2 = batch_c2['clip'].to(self.device)
+            y = batch_c1['label'].to(self.device)
+            loss, metrics = self.rgb_pn(x_c1, x_c2, y)
             loss.backward()
             self.optimizer.step()
             # Step scheduler
@@ -144,8 +146,8 @@ class Model:
             self,
             dataset_config: DatasetConfiguration
     ) -> Union[CASIAB]:
-        self.train_size = dataset_config['train_size']
-        self.in_channels = dataset_config['num_input_channels']
+        self.train_size = dataset_config.get('train_size', 74)
+        self.in_channels = dataset_config.get('num_input_channels', 3)
         self._dataset_sig = self._make_signature(
             dataset_config,
             popped_keys=['root_dir', 'cache_on']
diff --git a/test/cuda.py b/test/cuda.py
new file mode 100644
index 0000000..ef0ea36
--- /dev/null
+++ b/test/cuda.py
@@ -0,0 +1,35 @@
+import torch
+
+from models import RGBPartNet
+
+P, K = 2, 4
+N, T, C, H, W = P * K, 10, 3, 64, 32
+
+
+def rand_x1_x2_y(n, t, c, h, w):
+    x1 = torch.rand(n, t, c, h, w)
+    x2 = torch.rand(n, t, c, h, w)
+    y = []
+    for p in range(P):
+        y += [p] * K
+    y = torch.as_tensor(y)
+    return x1, x2, y
+
+
+def test_default_rgb_part_net_cuda():
+    rgb_pa = RGBPartNet()
+    rgb_pa = rgb_pa.cuda()
+    x1, x2, y = rand_x1_x2_y(N, T, C, H, W)
+    x1, x2, y = x1.cuda(), x2.cuda(), y.cuda()
+
+    rgb_pa.train()
+    loss, metrics = rgb_pa(x1, x2, y)
+    _, _, _, _ = metrics
+    assert loss.device == torch.device('cuda', torch.cuda.current_device())
+    assert tuple(loss.size()) == ()
+    assert isinstance(_, float)
+
+    rgb_pa.eval()
+    x = rgb_pa(x1, x2)
+    assert x.device == torch.device('cuda', torch.cuda.current_device())
+    assert tuple(x.size()) == (23, N, 256)
-- 
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