~/talk

Java Vector API

on YouTube 43m
Talkat JVM Language Summit 2018 · 2018-08-04..08-06· [java, web-performance]

speakers

name:Sandhya Viswanathan
links:none on file
name:Vladimir Ivanov
website:https://vvsevolodovich.dev

resources

video:https://youtu.be/YA9wfTrBr_4
slides:none on file

summary

Java Vector API builds a portable SIMD surface in OpenJDK Project Panama with an x86_64 backend that emits xmm/ymm/zmm code and keeps vectors in registers; generated code shows 256‑bit and 512‑bit zmm codepaths and up to 12–13× speedup on a sepia filter and 4–5× for matrix/dot kernels, using a backend with about 15 parameterized intrinsics to avoid explosion. API is candidate-stage, implements arithmetic/masks/shuffles, still needs alignment, bounds and codegen tuning before wide release.

AI-written summary · about

chapters (6)

  1. 0:00Start
  2. 2:46Vector API Methods
  3. 3:44Simple Example Walkthrough
  4. 26:15Sepia filter: Generated Code
  5. 29:23Dot Product: Performance
  6. 30:32Matrix Multiplication: Performance

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