Add CPU metrics for _fetch_event_list
add a Measure block on _fetch_event_list, in the hope that we can better measure CPU usage here.
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@ -222,10 +222,8 @@ class EventsWorkerStore(SQLBaseStore):
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"""Takes a database connection and waits for requests for events from
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the _event_fetch_list queue.
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"""
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event_list = []
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i = 0
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while True:
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try:
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with self._event_fetch_lock:
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event_list = self._event_fetch_list
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self._event_fetch_list = []
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@ -241,6 +239,22 @@ class EventsWorkerStore(SQLBaseStore):
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continue
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i = 0
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self._fetch_event_list(conn, event_list)
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def _fetch_event_list(self, conn, event_list):
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"""Handle a load of requests from the _event_fetch_list queue
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Args:
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conn (twisted.enterprise.adbapi.Connection): database connection
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event_list (list[Tuple[list[str], Deferred]]):
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The fetch requests. Each entry consists of a list of event
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ids to be fetched, and a deferred to be completed once the
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events have been fetched.
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"""
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with Measure(self._clock, "_fetch_event_list"):
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try:
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event_id_lists = zip(*event_list)[0]
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event_ids = [
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item for sublist in event_id_lists for item in sublist
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@ -280,7 +294,6 @@ class EventsWorkerStore(SQLBaseStore):
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with PreserveLoggingContext():
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d.errback(e)
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if event_list:
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with PreserveLoggingContext():
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self.hs.get_reactor().callFromThread(fire, event_list)
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