Clifford Jansen created PROTON-2328:
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Summary: epoll proactor bug in tracking previous task used by a
thread
Key: PROTON-2328
URL: https://issues.apache.org/jira/browse/PROTON-2328
Project: Qpid Proton
Issue Type: Bug
Components: proton-c
Affects Versions: proton-c-0.33.0
Environment: linux
Reporter: Clifford Jansen
Assignee: Clifford Jansen
Fix For: proton-c-0.34.0
If an unassigned (ready) task and a free thread were each most recently working
together, the epoll proactor tries to reassign them together for the next
processing of the task, so that a warm memory cache may help performance.
One half of this pairing information is in tslot_t->prev_task. This value is
always set to NULL, defeating the warm cache strategy. In unassign_thread()
prev_task should be set from the local variable that contains the correct value
and not the member variable tslot_t->task which is zeroed on an earlier line.
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