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The output of the tf.mean operation on the CPU backend is inconsistent with the output on the WebGL, Wasm, and TensorFlow backends #8401

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liliquan0118 opened this issue Oct 2, 2024 · 0 comments
Open

The output of the tf.mean operation on the CPU backend is inconsistent with the output on the WebGL, Wasm, and TensorFlow backends #8401

liliquan0118 opened this issue Oct 2, 2024 · 0 comments
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@mattsoulanille @shmishra99
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comp:backend-webgl comp:wasm stat:awaiting tensorflower type:bug Something isn't working

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@liliquan0118
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Please make sure that this is a bug. As per our
GitHub Policy,
we only address code/doc bugs, performance issues, feature requests and
build/installation issues on GitHub. tag:bug_template

System information

  • Have I written custom code (as opposed to using a stock example script provided in TensorFlow.js):
  • OS Platform and Distribution (e.g., Linux Ubuntu 16.04): Ubuntu 20.04, Macos 13.3 (22E252)
  • Mobile device (e.g. iPhone 8, Pixel 2, Samsung Galaxy) if the issue happens on mobile device:
  • TensorFlow.js installed from (npm or script link): script link
  • TensorFlow.js version (use command below): 4.2.0
  • Browser version: Chrome Version 128.0.6613.86 (Official Build) (arm64)
  • Tensorflow.js Converter Version:

Describe the current behavior
tf.mean([2132166414.0524406,1061001875.3433719,-1378280739.4604993,580317280.6221428,189636615.92772198,1046490414.9768481], 0) return 605221952 on CPU backend. However, it returns 605222016 on WebGL and Wasm backends.

image

Describe the expected behavior
The output should be consistent across all backends.

Standalone code to reproduce the issue
Provide a reproducible test case that is the bare minimum necessary to generate
the problem. If possible, please share a link to Colab/CodePen/any notebook.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>bug00</title>
    <script src="https://cdn.jsdelivr.net/npm/@tensorflow/[email protected]/dist/tf.js"> </script>
    <script src="https://cdn.jsdelivr.net/npm/@tensorflow/[email protected]/dist/tf-backend-wasm.js"></script>
</head>
<body>

<script>
    async function mean(backend){
        await tf.setBackend(backend);
        await tf.ready() 
        var a = [2132166414.0524406,1061001875.3433719,-1378280739.4604993,580317280.6221428,189636615.92772198,1046490414.9768481]
        var b = 0
       var result = await tf.mean(a, b);
        await console.log("the result of ", tf.getBackend(), "is:\n" );
        await result.print();
    }
    async function test() {
        await mean("cpu");
        await mean("webgl");
        await mean("wasm");
    }
    
    test();
</script>
</body>
</html>

Other info / logs Include any logs or source code that would be helpful to
diagnose the problem. If including tracebacks, please include the full
traceback. Large logs and files should be attached.
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@mattsoulanille mattsoulanille

@shmishra99 shmishra99

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comp:backend-webgl comp:wasm stat:awaiting tensorflower type:bug Something isn't working
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@mattsoulanille @liliquan0118 @shmishra99