On 04/07/2013 06:42 AM, Paul Berry wrote:
The call to emit_shader_time_end() before the second URB write was
conditioned with "if (eot)", but eot is always false in this code
path, so emit_shader_time_end() was never being called for vertex
shaders that performed 2 URB writes.
I had to look at that code for way to long to convince myself that your
patch was correct. I think it might be better to remove both the
conditional emit_shader_time_end calls and put this block of code at the
very bottom (unless emit_shader_time_end has some side effect that I
don't see):
if (inst->eot) {
if (INTEL_DEBUG & DEBUG_SHADER_TIME)
emit_shader_time_end();
}
Or does the last URB write have to be the last instruction?
---
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index 8bd2fd8..ca1cfe8 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -2664,10 +2664,8 @@ vec4_visitor::emit_urb_writes()
emit_urb_slot(mrf++, c->prog_data.vue_map.slot_to_varying[slot]);
}
- if (eot) {
- if (INTEL_DEBUG & DEBUG_SHADER_TIME)
- emit_shader_time_end();
- }
+ if (INTEL_DEBUG & DEBUG_SHADER_TIME)
+ emit_shader_time_end();
current_annotation = "URB write";
inst = emit(VS_OPCODE_URB_WRITE);
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