From e401cfa28a6e32d7081f9de998e731965ce966fb Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Sun, 30 Jul 2017 16:15:56 -0700 Subject: [PATCH] i965: Allow mapped VBOs during drawing in non-debug contexts. Section 6.3.2 of the GL 4.5 spec says: "Any GL command which attempts to read from, write to, or change the state of a buffer object may generate an INVALID_OPERATION error if all or part of the buffer object is mapped ... However, only commands which explicitly describe this error are required to do so. If an error is not generated, such commands will have undefined results and may result in GL interruption or termination." Setting this flag allows us to skip walking over the buffer bindings for every enabled vertex attribute (_mesa_all_buffers_are_unmapped). Improves performance in GFXBench4's gl_driver2_off microbenchmark by 3.05797% +/- 0.709031% (n=33) on Apollolake. This breaks KHR-*.draw_elements_base_vertex_tests.invalid_mapped_bos, but that test is invalid and has been removed from the upstream CTS. Reviewed-by: Eric Anholt --- src/mesa/drivers/dri/i965/brw_context.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c index 751b0264395..609d8150641 100644 --- a/src/mesa/drivers/dri/i965/brw_context.c +++ b/src/mesa/drivers/dri/i965/brw_context.c @@ -694,6 +694,9 @@ brw_initialize_context_constants(struct brw_context *brw) */ if (devinfo->gen >= 7) ctx->Const.UseSTD430AsDefaultPacking = true; + + if (!(ctx->Const.ContextFlags & GL_CONTEXT_FLAG_DEBUG_BIT)) + ctx->Const.AllowMappedBuffersDuringExecution = true; } static void -- 2.30.2