From 266fec1307b26a544007423582afd8618791893c Mon Sep 17 00:00:00 2001 From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= Date: Mon, 4 May 2020 17:41:41 -0400 Subject: [PATCH] radeonsi: don't wait for idle at the end of gfx IBs Reviewed-by: Pierre-Eric Pelloux-Prayer Part-of: --- src/gallium/drivers/radeonsi/si_gfx_cs.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/src/gallium/drivers/radeonsi/si_gfx_cs.c b/src/gallium/drivers/radeonsi/si_gfx_cs.c index 30ba6b02f87..087df67d61d 100644 --- a/src/gallium/drivers/radeonsi/si_gfx_cs.c +++ b/src/gallium/drivers/radeonsi/si_gfx_cs.c @@ -78,6 +78,19 @@ void si_flush_gfx_cs(struct si_context *ctx, unsigned flags, struct pipe_fence_h if (ctx->gfx_flush_in_progress) return; + /* The amdgpu kernel driver always synchronizes execution for shared DMABUFs + * between processes, so we don't have to wait at the end of IBs to make sure + * everything is idle. + * + * The amdgpu winsys synchronizes execution for buffers shared by different + * contexts within the same process. + * + * Interop with AMDVLK, RADV, or OpenCL within the same process requires + * explicit fences or glFinish. + */ + if (ctx->screen->info.is_amdgpu) + flags |= RADEON_FLUSH_START_NEXT_GFX_IB_NOW; + if (!ctx->screen->info.kernel_flushes_tc_l2_after_ib) { wait_flags |= wait_ps_cs | SI_CONTEXT_INV_L2; } else if (ctx->chip_class == GFX6) { -- 2.30.2