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PyTorch eager

PyTorch · python · MIT

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Vendorable · source mirrored · MITView source →

No package. Vendor the mirrored source: 31 lines, MIT.

23_Softmax.py
curl "https://kernelindex.com/api/v1/implementations/kernelbench-l1-23-softmax-torch?include=source"
interfacepython · torch_eager
symbolModel.forward
Compatibility
measured onNVIDIA H100
declared hardwaredeclared only
architectures—
dtypes

Benchmark evidence

2 measurements across 1 GPU, fastest first.

Operation / workload
Hardware
Latency
Rank
Observed
Softmaxfp32 · [4096, 393216]
NVIDIA H100
8.52ms±0.04
#2 of 2
2026-03-05
Softmaxfp32 · [4096, 393216]
NVIDIA H100
14.3ms±0.01
#2 of 2
2026-03-05

Reported · How evidence levels are derived →

Source and license

sourceavailable
revision digestsha256:69c81d4794b7bcf9caae950816ab2911f2e7c63afb4408d3a6bac930697199cd
license declaredMIT
license concludedMIT
imported2026-08-26

Kernel source

23_Softmax.py31 lines
import torch
import torch.nn as nn

class Model(nn.Module):
    """
    Simple model that performs a Softmax activation.
    """
    def __init__(self):
        super(Model, self).__init__()
    
    def forward(self, x: torch.Tensor) -> torch.Tensor:
        """
        Applies Softmax activation to the input tensor.

        Args:
            x (torch.Tensor): Input tensor of shape (batch_size, num_features).

        Returns:
            torch.Tensor: Output tensor with Softmax applied, same shape as input.
        """
        return torch.softmax(x, dim=1)

batch_size = 4096
dim = 393216

def get_inputs():
    x = torch.rand(batch_size, dim)
    return [x]

def get_init_inputs():
    return []  # No special initialization inputs needed
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Source code from KernelBench, © 2023 Anne Ouyang, Simon Guo, Azalia Mirhoseini (Scaling Intelligence Lab, Stanford University), MIT License · MIT

Best evidence level for this revision: reported

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