[Mesa-dev] [PATCH 1/2] i965: Print instructions' children during scheduling debugging.

[Matt Turner]

Useful for tracking down problems in dependency calculations.

Scheduling debugging now prints:

clock    2, scheduled: linterp vgrf5, hw_reg2, hw_reg3, hw_reg0,
        child 0, 53 parents: fb_write (null), (null), (null), (null),
        child 1, 2 parents: tex vgrf4, vgrf5, (null), (null),
        child 2, 52 parents: placeholder_halt (null), (null), (null), (null),
clock    4, scheduled: linterp vgrf5+1, hw_reg2, hw_reg3, hw_reg0+16,
        child 0, 52 parents: fb_write (null), (null), (null), (null),
        child 1, 1 parents: tex vgrf4, vgrf5, (null), (null),
                now available
        child 2, 51 parents: placeholder_halt (null), (null), (null), (null),
---
 src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp b/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp
index b24c38c..84b74ff 100644
--- a/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp
+++ b/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp
@@ -1065,11 +1065,15 @@ instruction_scheduler::schedule_instructions(backend_instruction *next_block_hea
 	 child->unblocked_time = MAX2(child->unblocked_time,
 				      time + chosen->child_latency[i]);
 
+         if (debug) {
+            printf("\tchild %d, %d parents: ", i, child->parent_count);
+            bv->dump_instruction(child->inst);
+         }
+
 	 child->parent_count--;
 	 if (child->parent_count == 0) {
             if (debug) {
-               printf("now available: ");
-               bv->dump_instruction(child->inst);
+               printf("\t\tnow available\n");
             }
 	    instructions.push_tail(child);
 	 }
-- 
1.8.3.2