1. 17 Feb, 2017 1 commit
  2. 12 Oct, 2015 1 commit
  3. 09 Dec, 2014 1 commit
    • Matt Turner's avatar
      Add a new runner, written in C. · c6a13041
      Matt Turner authored
      Whereas run.py runs piglit's shader_runner binary to compile each shader
      individually and parses the output of INTEL_DEBUG=fs,vs,gs to find the
      number of instructions and loops, this runner compiles all of the
      shaders from a single process and uses output from GL_KHR_debug to get
      the information we want.
      
      It uses EGL and GBM (and render nodes) to create a GL display and uses
      libepoxy for GL function pointer management.
      
      It creates one thread per-CPU using OpenMP, each of which compiles
      shaders in parallel. It creates two OpenGL contexts, one core context
      and one compatibility context and switches between them as needed.
      
      run.py is able to compile all of the GLSL shaders in shader-db
      (including the closed portion) in about 300 seconds on my quad-core
      Haswell. This program can do the same in 90 seconds.
      
      Profiling shows that it's largely limited by malloc performance, and
      preloading jemalloc (LD_PRELOAD=/usr/lib64/libjemalloc.so.1) reduces the
      execution time to about 80 seconds.
      c6a13041