#14898: pass in pad value to transpose in reduce (#17142)

### Ticket
Link to Github Issue #14898 

Subset of previous PR
(#16989) that caused a hang
in (Single-card) Demo tests and got reverted. Verified that this
pipeline passes for this subset of changes:
https://github.com/tenstorrent/tt-metal/actions/runs/12992459972

### Problem description
- transpose was filling in non-logical areas with default pad value when
called from reduce

### What's changed
- pass in an appropriate pad value for transpose to use
- also mark a method that should only be used by pool to be deprecated
to deter other uses

### Checklist
- [x] Post commit CI passes
https://github.com/tenstorrent/tt-metal/actions/runs/12992465641
- [ ] Blackhole Post commit (if applicable)
- [ ] Model regression CI testing passes (if applicable)
- [ ] Device performance regression CI testing passes (if applicable)
- [ ] **(For models and ops writers)** Full [new
models](https://github.com/tenstorrent/tt-metal/actions/workflows/full-new-models-suite.yaml)
tests passes
- [x] New/Existing tests provide coverage for changes

tests/tt_eager/python_api_testing/unit_testing/misc/test_min_max.py

@@ -53,8 +53,6 @@ def test_min_max_for_dim_hw(device, use_program_cache, shape_dim, kind, layout):
     if kind == "max":
         value = x.max()
     elif kind == "min":
-        if N * C % 32 != 0:
-            pytest.skip("global min with Tensor dimension N*C not multiple of 32 is not supported at this time.")
         value = x.min()
     elif kind == "mean":
         value = x.mean()

tests/ttnn/unit_tests/operations/test_max.py

@@ -8,7 +8,7 @@
 
 import ttnn
 from tests.ttnn.utils_for_testing import assert_with_pcc
-from models.utility_functions import torch_random
+from models.utility_functions import torch_random, is_grayskull
 
 
 @pytest.mark.parametrize("batch_size", [1, 16, 1, 16])
@@ -99,11 +99,24 @@ def test_max_global(device, batch_size, h, w):
         ((2, 32, 32, 64), -3),
         ((32, 32, 64), -3),
         ((1, 2, 3, 4), -1),
+        ((2, 22, 37, 41), -4),
+        ((2, 32, 64, 64), -3),
+        ((2, 22, 37, 41), -3),
+        ((2, 32, 64, 64), -2),
+        ((2, 22, 37, 41), -1),
+        ((2, 32, 64, 64), -1),
+        ((2, 22, 37), -3),
+        ((2, 22, 37), -2),
+        ((2, 22, 37), -1),
+        ((1, 6, 7), -3),
+        ((32, 6, 7), -3),
     ],
 )
 @pytest.mark.parametrize("keepdim", [True, False])
 def test_max_dim(device, input_shape_and_dim, keepdim):
     input_shape, max_dim = input_shape_and_dim
+    if is_grayskull() and (input_shape[-1] % 32 != 0 or input_shape[-2] % 32 != 0 or input_shape[max_dim] % 32 != 0):
+        pytest.skip("If not a tile size multiple, may fail on GS if run all the tests in this file. #17084")
 
     torch_input_tensor = torch_random(input_shape, -100, 100, dtype=torch.bfloat16)
     torch_output_tensor, _ = torch.max(torch_input_tensor, dim=max_dim, keepdim=keepdim)

tests/ttnn/unit_tests/operations/test_reduction_mean.py

@@ -22,6 +22,7 @@ def test_mean(device, batch_size, h, w, dim):
     torch_output_tensor = torch.mean(torch_input_tensor, dim=dim, keepdim=True, dtype=torch.bfloat16)
 
     input_tensor = ttnn.from_torch(torch_input_tensor, layout=ttnn.TILE_LAYOUT, device=device)
+    ttnn.fill_implicit_tile_padding(input_tensor, 42)  # garbage padding to test that mean removes it
 
     output_tensor = ttnn.mean(input_tensor, dim=dim)
     output_tensor = ttnn.to_torch(output_tensor)

ttnn/cpp/ttnn/operations/reduction/generic/generic_reductions.cpp

@@ -50,6 +50,12 @@ ttnn::SmallVector<int> generate_reduce_dim(
     return dim;
 }
 
+float get_pad_value(ReduceType reduce_type) {
+    return reduce_type == ReduceType::Max
+               ? -std::numeric_limits<float>::infinity()
+               : (reduce_type == ReduceType::Min ? std::numeric_limits<float>::infinity() : 0);
+}
+
 template <ReduceType reduce_type>
 static Tensor reduce_impl(
     const Tensor& input_tensor_arg,
@@ -79,6 +85,7 @@ static Tensor reduce_impl(
     auto input_tensor = ttnn::unsqueeze_to_4D(input_tensor_arg);
 
     Tensor output_tensor;
+    float pad_value = get_pad_value(reduce_type);
     bool single_reduce_op = (dim.size() == 1 && (dim[0] == rank - 1 || dim[0] == rank - 2)) ||
                             (dim.size() == 2 && dim[1] == rank - 1 && dim[0] == rank - 2);
     if (!single_reduce_op) {
@@ -92,7 +99,7 @@ static Tensor reduce_impl(
                     int adjusted_dim = offset + i_dim;
                     int reduce_dim = adjusted_dim;
                     if (transpose) {
-                        output_tensor = ttnn::transpose(output_tensor, adjusted_dim, 2, memory_config);
+                        output_tensor = ttnn::transpose(output_tensor, adjusted_dim, -2, memory_config, pad_value);
                         reduce_dim = 2;
                     }
                     if (use_reduce_type) {
@@ -115,7 +122,7 @@ static Tensor reduce_impl(
                             /*reshape=*/false);
                     }
                     if (transpose) {
-                        output_tensor = ttnn::transpose(output_tensor, adjusted_dim, -2, memory_config);
+                        output_tensor = ttnn::transpose(output_tensor, adjusted_dim, -2, memory_config, pad_value);
                     }
                 }
             }
@@ -241,9 +248,7 @@ Tensor Reduce<reduce_type>::invoke(
     const std::optional<DeviceComputeKernelConfig>& compute_kernel_config,
     float scalar) {
     ttnn::SmallVector<int> dim = generate_reduce_dim(input_tensor_arg, dim_arg);
-    float pad_value = reduce_type == ReduceType::Max
-                          ? -std::numeric_limits<float>::infinity()
-                          : (reduce_type == ReduceType::Min ? std::numeric_limits<float>::infinity() : 0);
+    float pad_value = get_pad_value(reduce_type);
     bool is_tiled = input_tensor_arg.get_layout() == TILE_LAYOUT;
     auto input_tensor = is_tiled ? ttnn::fill_implicit_tile_padding(input_tensor_arg, pad_value) : input_tensor_arg;
     if constexpr (reduce_type == ReduceType::Std || reduce_type == ReduceType::Var) {

ttnn/cpp/ttnn/operations/reduction/generic/generic_reductions.hpp

@@ -34,6 +34,7 @@ struct Reduce {
 };
 
 // Entry point for pool op, which uses non-standard tensors that cannot be padded.
+[[deprecated]]
 Tensor pool_sum(
     const Tensor& input_tensor_arg,
     int dim_arg,