From: Kenneth Graunke Date: Sun, 30 Jul 2017 23:15:56 +0000 (-0700) Subject: i965: Allow mapped VBOs during drawing in non-debug contexts. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e401cfa28a6e32d7081f9de998e731965ce966fb;p=mesa.git 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 --- 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