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context: rework node states some more

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Make collect_nodes return a list of all nodes that are in some way
linked to the node and need to be scheduled as a group.
Move all the collected nodes to a driver, a fallback driver or away
from a driver.

This fixes some cases where nodes were moved quickly between drivers,
causing a lot of activation messages to be sent and fds to be dupped.
Nodes should now only move when needed with minimal amount of
changes to their state.

See #2309
This commit is contained in:
Wim Taymans 2022-04-20 13:11:14 +02:00
parent cc7aadde8a
commit f6dbd75e61
1 changed files with 57 additions and 39 deletions
Download patch file Download diff file Expand all files Collapse all files

96
src/pipewire/context.c
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@ -915,27 +915,15 @@ static int ensure_state(struct pw_impl_node *node, bool running)
return pw_impl_node_set_state(node, state);
}
static int collect_nodes(struct pw_context *context, struct pw_impl_node *node)
static int collect_nodes(struct pw_context *context, struct pw_impl_node *node, struct spa_list *collect)
{
struct spa_list queue;
struct pw_impl_node *n, *t, *driver;
struct pw_impl_node *n, *t;
struct pw_impl_port *p;
struct pw_impl_link *l;
pw_log_debug("node %p: '%s'", node, node->name);
if (node->driver) {
driver = node;
spa_list_consume(t, &driver->follower_list, follower_link) {
spa_list_remove(&t->follower_link);
spa_list_init(&t->follower_link);
}
} else {
driver = node->driver_node;
if (driver == NULL)
return -EINVAL;
}
/* start with node in the queue */
spa_list_init(&queue);
spa_list_append(&queue, &node->sort_link);
@ -944,8 +932,10 @@ static int collect_nodes(struct pw_context *context, struct pw_impl_node *node)
/* now follow all the links from the nodes in the queue
* and add the peers to the queue. */
spa_list_consume(n, &queue, sort_link) {
pw_log_debug(" next node %p: '%s'", n, n->name);
spa_list_remove(&n->sort_link);
pw_impl_node_set_driver(n, driver);
spa_list_append(collect, &n->sort_link);
n->passive = true;
if (!n->active)
@ -964,7 +954,7 @@ static int collect_nodes(struct pw_context *context, struct pw_impl_node *node)
continue;
if (!l->passive)
node->passive = driver->passive = n->passive = false;
node->passive = n->passive = false;
if (!t->visited) {
t->visited = true;
@ -985,7 +975,7 @@ static int collect_nodes(struct pw_context *context, struct pw_impl_node *node)
continue;
if (!l->passive)
node->passive = driver->passive = n->passive = false;
node->passive = n->passive = false;
if (!t->visited) {
t->visited = true;
@ -1011,6 +1001,27 @@ static int collect_nodes(struct pw_context *context, struct pw_impl_node *node)
return 0;
}
static void move_to_driver(struct pw_context *context, struct spa_list *nodes,
struct pw_impl_node *driver)
{
struct pw_impl_node *n;
pw_log_debug("driver: %p %s", driver, driver->name);
spa_list_consume(n, nodes, sort_link) {
spa_list_remove(&n->sort_link);
pw_log_debug(" follower: %p %s", n, n->name);
pw_impl_node_set_driver(n, driver);
}
}
static void remove_from_driver(struct pw_context *context, struct spa_list *nodes)
{
struct pw_impl_node *n;
spa_list_consume(n, nodes, sort_link) {
spa_list_remove(&n->sort_link);
pw_impl_node_set_driver(n, NULL);
ensure_state(n, false);
}
}
static inline void get_quantums(struct pw_context *context, uint32_t *def,
uint32_t *min, uint32_t *max, uint32_t *limit, uint32_t *rate)
{
@ -1113,6 +1124,7 @@ int pw_context_recalc_graph(struct pw_context *context, const char *reason)
uint32_t max_quantum, min_quantum, def_quantum, lim_quantum, rate_quantum;
uint32_t *rates, n_rates, def_rate;
bool freewheel = false, global_force_rate, force_rate, force_quantum, global_force_quantum;
struct spa_list collect;
pw_log_info("%p: busy:%d reason:%s", context, impl->recalc, reason);
@ -1140,9 +1152,11 @@ again:
if (n->exported)
continue;
if (!n->visited)
collect_nodes(context, n);
if (!n->visited) {
spa_list_init(&collect);
collect_nodes(context, n, &collect);
move_to_driver(context, &collect, n);
}
/* from now on we are only interested in active driving nodes.
* We're going to see if there are active followers. */
if (!n->driving || !n->active)
@ -1179,35 +1193,39 @@ again:
/* now go through all available nodes. The ones we didn't visit
* in collect_nodes() are not linked to any driver. We assign them
* to either an active driver or the first driver */
* to either an active driver or the first driver if they are in a
* group that needs a driver. Else we remove them from a driver
* and stop them. */
spa_list_for_each(n, &context->node_list, link) {
struct pw_impl_node *t;
struct pw_impl_node *t, *driver;
if (n->exported || n->visited)
continue;
pw_log_debug("%p: unassigned node %p: '%s' active:%d want_driver:%d target:%p",
context, n, n->name, n->active, n->want_driver, target);
t = n->want_driver && n->active ? target : NULL;
if (t != NULL) {
pw_impl_node_set_driver(n, t);
/* we configured a driver, move all linked
* nodes to it as well */
if (n->always_process)
t->passive = false;
collect_nodes(context, n);
if (!n->always_process && n->passive)
/* nothing active and node doesn't need to be
* scheduled, remove from driver again and
* stop */
t = NULL;
/* collect all nodes in this group */
spa_list_init(&collect);
collect_nodes(context, n, &collect);
driver = NULL;
spa_list_for_each(t, &collect, sort_link) {
/* is any active and want a driver or it want process */
if ((t->want_driver && t->active && !n->passive) ||
t->always_process)
driver = target;
}
if (t == NULL) {
/* no driver, make sure the node stops */
pw_impl_node_set_driver(n, NULL);
ensure_state(n, false);
if (driver != NULL) {
/* driver needed for this group */
driver->passive = false;
move_to_driver(context, &collect, driver);
} else {
/* no driver, make sure the nodes stops */
remove_from_driver(context, &collect);
}
}
/* clean up the visited flag now */
spa_list_for_each(n, &context->node_list, link)
n->visited = false;