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Hyunsung Lee
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  • PTX Mental Model

    5 Oct 2025

    Simplest matmul using PTX During the Chuseok (Mid-Autumn Festival) break I decided to build a clear mental model for how mma works at the PTX level. The example below is close to the simplest matrix multiply that mixes CUDA and PTX. The…

  • Adding Scaled Dot Product to Triton

    29 Aug 2025

    Recently, my first contribution to Triton ( PR #7918 ) was merged. This features a new matrix multiply operation introduced in sm_120 NVIDIA architectures (RTX 50XX series and RTX Pro 6000). Thanks to @masahi , and @mobiacham , I was able…

  • Mental disorder and work-life balance

    25 Jul 2025

    Work culture I’ve seen many people on LinkedIn saying that work-life balance is a lie. They claim that Europe, with its pro–work-life-balance culture, has been declining, while Chinese tech giants—famous for the 996 culture—are on the…

  • SVDQuant and Nunchaku

    30 Mar 2025

    Introduction This is a super brief summary of SVDQUant . Please refer to the original paper if interested. Q X = round ⁡ ( X / s X ) Q_X = \operatorname{round}(X / s_X) Q X ​ = round ( X / s X ​ ) s X = max ⁡ ( ∣ X ∣ ) / q m a x s_X =…

  • Thoughts

    29 Mar 2025

    다짐 I'm proud Nvidian. I work hard, ethically.

  • A plan for getting involved in an open source project

    9 Feb 2025

    I have little experience with open source, but currently I’m neither associated with nor active in any open source project. I want to be, and I have a good plan for it. From my experience, I believe it’s a good plan, so other people who…

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