Mesa (master): radeonsi: also prefetch compute shaders
Marek Olšák
mareko at kemper.freedesktop.org
Mon Jan 30 12:27:32 UTC 2017
Module: Mesa
Branch: master
Commit: 4a4ff66dbebe836492a6b6321742c21ca9bcd70a
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=4a4ff66dbebe836492a6b6321742c21ca9bcd70a
Author: Marek Olšák <marek.olsak at amd.com>
Date: Tue Jan 24 03:41:05 2017 +0100
radeonsi: also prefetch compute shaders
Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>
---
src/gallium/drivers/radeonsi/si_compute.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/src/gallium/drivers/radeonsi/si_compute.c b/src/gallium/drivers/radeonsi/si_compute.c
index fe29fb1..d05c488 100644
--- a/src/gallium/drivers/radeonsi/si_compute.c
+++ b/src/gallium/drivers/radeonsi/si_compute.c
@@ -372,6 +372,18 @@ static bool si_switch_compute_shader(struct si_context *sctx,
RADEON_PRIO_SCRATCH_BUFFER);
}
+ /* Prefetch the compute shader to TC L2.
+ *
+ * We should also prefetch graphics shaders if a compute dispatch was
+ * the last command, and the compute shader if a draw call was the last
+ * command. However, that would add more complexity and we're likely
+ * to get a shader state change in that case anyway.
+ */
+ if (sctx->b.chip_class >= CIK) {
+ cik_prefetch_TC_L2_async(sctx, &program->shader.bo->b.b,
+ 0, program->shader.bo->b.b.width0);
+ }
+
shader_va = shader->bo->gpu_address + offset;
if (program->use_code_object_v2) {
/* Shader code is placed after the amd_kernel_code_t
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