Brian Paul <bri...@vmware.com> writes: > When we run piglit the all.py script traverses the entire tests/ and > generated/tests/ directories looking for *.shader_test, *.vert, *.frag, > etc. shaders to run. In the generated_tests/ directory, there's about > 60,000 entries to scan (ls -R generated_tests|wc) > > This takes some time, especially so with MinGW in a Windows VM. Between > that and other setup overhead it takes about 8 minutes on my system > before any tests are run. Ugh. Linux is much faster but there's still > a start-up lag. > > I'd like to trim this down. The prime area I'm looking at is skipping > swaths of tests when we know the particular feature is not supported by > the GL driver. > > In framework/driver_classifier.py we run glxinfo to get the GL renderer > string, etc. I'm looking at expanding this to get the driver's GL and > GLSL versions, extension list, etc. > > Then, in all.py when we're scanning the tests directory and we find > somthing like "spec/arb_gpu_shader_fp64" which may not be supported by > the driver, we can skip that directory. For drivers which don't support > all the latest GL 4.x extensions (like VMware's) we can save a lot of > time by skipping subdirectory traversals and building the test list. > > I'm digging into this now but it'll probably be a few days before I'll > have something to review. > > I'd be interested to hear any other ideas to reduce start-up time.
vc4 is also terrible to test these days due to the explosion of generated shader_tests we have -- I've got them hacked out of my builds due to FS space used and the minutes it takes to start piglit when they're present. For a solution to the startup time, I wish we would just build our whole test list using filesystem walks or whatever at piglit build time, instead of executing python to build the test list per piglit run.
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