kgiusti commented on a change in pull request #1349:
URL: https://github.com/apache/qpid-dispatch/pull/1349#discussion_r695775137
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File path: src/router_core/router_core_thread.c
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@@ -213,25 +187,48 @@ void *router_core_thread(void *arg)
//
sys_mutex_lock(core->action_lock);
- //
- // Block on the condition variable when there is no action to do
- //
- while (core->running && DEQ_IS_EMPTY(core->action_list)) {
- if (!router_core_process_background_action_LH(core))
- sys_cond_wait(core->action_cond, core->action_lock);
+ for (;;) {
+ if (!DEQ_IS_EMPTY(core->action_list)) {
Review comment:
I originally tried exactly that - it was slightly slower than doing the
check before the move. That lock is so heavily contended that *any* extra
instructions run while holding the lock results in longer acquire times by the
I/O threads.
We should be good with initializing the local prior to entering the loop.
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