On Fri, Feb 24, 2017 at 12:32 PM, Jose Fonseca <jfons...@vmware.com> wrote: > On 23/02/17 21:54, Adam Jackson wrote: >> >> On Thu, 2017-02-23 at 21:59 +0100, Roland Scheidegger wrote: >> >>> So, what does the failing test do? >> >> >> Not much, curiously. There are five that fail and they're all fairly >> trivial, although the xts harness makes that hard to see. >> >> XClearArea/6 and XClearWindow/4 set the window background pixmap to >> None and calls XClearArea. This should not change any pixels; >> apparently it does. >> >> XClearArea/7 and XClearWindow/5 create a parent window, then a child, >> sets the parent bg to None, the child to ParentRelative, and clears the >> child. Again, this should not change anything, but does. >> >> XCopyArea/1 creates two windows, tiles the background of the first one >> (equivalent to ClearWindow), copies from one window to the other, and >> verifies that the second one has the right content. >> >> The first four there are a little strange because, in principle, the >> thing they're testing is that no rendering happens. Presumably what's >> being measured is that some _other_ rendering prior to the action under >> test is being done incorrectly. The CopyArea test is probably closest >> to the root cause. I'll drill down a bit on exactly what that turns >> into in terms of GL draws. >> >> - ajax >> > > I'm not sure if apitrace w/ glamor is practical / feasible, but being able > to repro the issue outside X would be great. >
I'm sure Adam knows this already, but for the record (and so I can find it again 3yrs from now when I need to): MESA_EXTENSION_OVERRIDE="-GL_ARB_buffer_storage" apitrace trace /usr/bin/Xephyr -glamor :1 -screen 1024x768 works like a charm.. I've used it to debug bugs that glamor triggers before BR, -R > > Another tack on this issue would be to revert parts of > 320d1191c61a0a82444605c12e5c4b2ee0b241eb separately and see which > trigger/fix the problem. > > In particular: > - src/gallium/drivers/llvmpipe/lp_bld_interp.c for interpolation > - src/gallium/auxiliary/draw/draw_llvm.c for viewport / clipping > - src/gallium/auxiliary/gallivm/lp_bld_tgsi_action.c for TGSI translation > > I tried to use fmad everywhere I could, but it's possible a couple or so is > simply a bad idea. > > > Jose > > _______________________________________________ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/mesa-dev _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
