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Depsgraph: Avoid having per-node lock when scheduling children

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Use atomic operations instead, should in theory improve timing of
scheduling. However, probably not so visible yet because actual
task scheduling still have some locks and memory allocations.

Baby steps, what would i say.
This commit is contained in:
Sergey Sharybin
2016-05-09 11:58:36 +02:00
parent dc5e02c42c
commit 5dbeea95d0
1 changed files with 2 additions and 6 deletions
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8
source/blender/depsgraph/intern/depsgraph_eval.cc
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@@ -248,12 +248,8 @@ static void schedule_node(TaskPool *pool, Depsgraph *graph, int layers,
}
if (node->num_links_pending == 0) {
BLI_spin_lock(&graph->lock);
bool need_schedule = !node->scheduled;
node->scheduled = true;
BLI_spin_unlock(&graph->lock);
if (need_schedule) {
bool is_scheduled = atomic_fetch_and_or_uint8((uint8_t*)&node->scheduled, (uint8_t)true);
if (!is_scheduled) {
if (node->is_noop()) {
/* skip NOOP node, schedule children right away */
schedule_children(pool, graph, node, layers);