OK. Would you mind give some link to some document what's the exact meaning of "dependence" in st/mesa since it's unrelated with gpu execution. Thanks.
On Fri, Jul 26, 2019 at 1:27 PM Marek Olšák <mar...@gmail.com> wrote: > > The order of GPU execution doesn't matter here. > > M. > > On Fri., Jul. 26, 2019, 16:11 Lepton Wu, <lep...@chromium.org> wrote: >> >> I am confused, for example, according to: >> >> https://www.khronos.org/opengl/wiki/Geometry_Shader, it come after >> Vertex shader, that mean, it depends on vertex shader, right? >> So st_update_gp should be after st_update_vp, but now it is in the >> front of st_update_vp. >> >> On Fri, Jul 26, 2019 at 1:07 PM Marek Olšák <mar...@gmail.com> wrote: >> > >> > >> > >> > On Fri., Jul. 26, 2019, 15:58 Lepton Wu, <lep...@chromium.org> wrote: >> >> >> >> If shader A depends on shader B, should we put st_update_shaderB in >> >> front of st_update_shaderA? >> > >> > >> > That's the current order. The order of GPU execution doesn't matter. >> > >> > M. >> > >> >> >> >> Now the order looks like reversed... >> >> >> >> On Fri, Jul 26, 2019 at 12:34 PM Marek Olšák <mar...@gmail.com> wrote: >> >> > >> >> > The order shouldn't matter, but there can be a reason behind it, e.g. >> >> > if a shader depends on the update of the following shader. >> >> > >> >> > Marek >> >> > >> >> > On Wed, Jul 24, 2019 at 7:19 PM Lepton Wu <lep...@chromium.org> wrote: >> >> >> >> >> >> In src/mesa/state_tracker/st_atom_list.h, >> >> >> >> >> >> Now it's this order: >> >> >> >> >> >> ST_STATE(ST_NEW_FS_STATE, st_update_fp) >> >> >> ST_STATE(ST_NEW_GS_STATE, st_update_gp) >> >> >> ST_STATE(ST_NEW_TES_STATE, st_update_tep) >> >> >> ST_STATE(ST_NEW_TCS_STATE, st_update_tcp) >> >> >> ST_STATE(ST_NEW_VS_STATE, st_update_vp) >> >> >> >> >> >> While code in >> >> >> src/mesa/state_tracker/st_atom.c: >> >> >> >> >> >> while (dirty_lo) >> >> >> update_functions[u_bit_scan(&dirty_lo)](st); >> >> >> >> >> >> That means if will call st_update_fp first and then st_update_gp... >> >> >> etc. >> >> >> >> >> >> But this is inconsistent with opengl pipeline: should we reverse the >> >> >> order here or I missed something? >> >> >> >> >> >> Background: >> >> >> >> >> >> https://gitlab.freedesktop.org/virgl/virglrenderer/issues/114 >> >> >> _______________________________________________ >> >> >> 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
