Module: Mesa Branch: master Commit: a73116ecc60414ade89802150b707b3336d8d50f URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=a73116ecc60414ade89802150b707b3336d8d50f
Author: Matt Turner <[email protected]> Date: Thu Aug 18 16:47:05 2016 -0700 i965/sched: Simplify work done by add_barrier_deps(). Scheduling barriers are implemented by placing a dependence on every node before and after the barrier. This is unnecessary as we can limit the number of nodes we place dependencies on to those between us and the next barrier in each direction. Runtime of dEQP-GLES31.functional.ssbo.layout.random.all_shared_buffer.23 is reduced from ~25 minutes to a little more than three. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94681 Reviewed-by: Kenneth Graunke <[email protected]> --- src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp b/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp index dfcaa80..a898706 100644 --- a/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp +++ b/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp @@ -94,6 +94,8 @@ public: * successors is an exit node. */ schedule_node *exit; + + bool is_barrier; }; /** @@ -800,6 +802,7 @@ schedule_node::schedule_node(backend_instruction *inst, this->cand_generation = 0; this->delay = 0; this->exit = NULL; + this->is_barrier = false; /* We can't measure Gen6 timings directly but expect them to be much * closer to Gen7 than Gen4. @@ -931,9 +934,13 @@ instruction_scheduler::add_barrier_deps(schedule_node *n) schedule_node *prev = (schedule_node *)n->prev; schedule_node *next = (schedule_node *)n->next; + n->is_barrier = true; + if (prev) { while (!prev->is_head_sentinel()) { add_dep(prev, n, 0); + if (prev->is_barrier) + break; prev = (schedule_node *)prev->prev; } } @@ -941,6 +948,8 @@ instruction_scheduler::add_barrier_deps(schedule_node *n) if (next) { while (!next->is_tail_sentinel()) { add_dep(n, next, 0); + if (next->is_barrier) + break; next = (schedule_node *)next->next; } } _______________________________________________ mesa-commit mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-commit
