ba46cb1140
Listener/status management invocation was rather expensive, and especially the cost of checking listeners, then setting status flags and triggering waitsets ran into severe lock contention. A major cost was the repeated use of dds_entity_lock and dds_entity_unlock, these have been eliminated. Another cost was that each time an event occurred (with DATA_AVAILABLE the most problematic one) it would walk the chain of ancestors to see if any had a relevant listener, and only if none of them had any, it would set the status flags. The locking/unlocking of the entity has been eliminated by moving the listener/status flag manipulation from the general entity lock to its m_observers_lock. That lock has a much smaller scope, and consequently contention has been significantly reduced. Instead of walking the entity hierarchy looking for listeners, an entity now inherits the ancestors' listeners. The set_listener operation has been made a little more complicated by the need to not only set the listeners for the specified entity, but to also update any inherited listeners its descendants. The commit is a bit larger than strictly needed ... I've started reformatting the code to reduce the variety of styles ... as there I haven't been able to find a single tool that does what I want, it may well end up as manual work. Signed-off-by: Erik Boasson <eb@ilities.com> |
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| idlc | ||
| os | ||
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| util | ||
| CMakeLists.txt | ||