Skip to content

gh-106527: asyncio: optimize to add/remove readers and writers #106528

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 8 commits into from
Jul 22, 2023
Merged

gh-106527: asyncio: optimize to add/remove readers and writers #106528

Show file tree
Hide file tree
Changes from 5 commits
Commits
Show all changes
8 commits
Select commit Hold shift + click to select a range
aa39201
Reduce overhead to add and remove asyncio readers and writers
bdraco Jul 7, 2023
df47703
📜🤖 Added by blurb_it.
blurb-it[bot] Jul 7, 2023
c3d04e7
refactor tests
bdraco Jul 7, 2023
4146a55
Merge remote-tracking branch 'origin/optimize_adding_removing_asyncio…
bdraco Jul 7, 2023
a06d56f
fix refactoring error
bdraco Jul 7, 2023
e9f4079
cleanups
bdraco Jul 12, 2023
98e5dad
Update 2023-07-07-18-22-07.gh-issue-106527.spHQ0W.rst
methane Jul 22, 2023
2730370
Merge branch 'main' into optimize_adding_removing_asyncio_writers
bdraco Jul 22, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
22 changes: 8 additions & 14 deletions Lib/asyncio/selector_events.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -274,9 +274,8 @@ def _ensure_fd_no_transport(self, fd):
def _add_reader(self, fd, callback, *args):
self._check_closed()
handle = events.Handle(callback, args, self, None)
try:
key = self._selector.get_key(fd)
except KeyError:
key = self._selector.get_map().get(fd)
if key is None:
self._selector.register(fd, selectors.EVENT_READ,
(handle, None))
else:
Expand All @@ -290,11 +289,8 @@ def _add_reader(self, fd, callback, *args):
def _remove_reader(self, fd):
if self.is_closed():
return False
try:
key = self._selector.get_key(fd)
except KeyError:
return False
else:
key = self._selector.get_map().get(fd)
if key is not None:
mask, (reader, writer) = key.events, key.data
mask &= ~selectors.EVENT_READ
if not mask:
Expand All @@ -311,9 +307,8 @@ def _remove_reader(self, fd):
def _add_writer(self, fd, callback, *args):
self._check_closed()
handle = events.Handle(callback, args, self, None)
try:
key = self._selector.get_key(fd)
except KeyError:
key = self._selector.get_map().get(fd)
if key is None:
self._selector.register(fd, selectors.EVENT_WRITE,
(None, handle))
else:
Expand All @@ -328,9 +323,8 @@ def _remove_writer(self, fd):
"""Remove a writer callback."""
if self.is_closed():
return False
try:
key = self._selector.get_key(fd)
except KeyError:
key = self._selector.get_map().get(fd)
if key is None:
return False
else:
mask, (reader, writer) = key.events, key.data
Expand Down
36 changes: 18 additions & 18 deletions Lib/test/test_asyncio/test_selector_events.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -178,7 +178,7 @@ def test_sock_connect_resolve_using_socket_params(self, m_gai):
sock.connect.assert_called_with(('127.0.0.1', 0))

def test_add_reader(self):
self.loop._selector.get_key.side_effect = KeyError
self.loop._selector.get_map.return_value = {}
cb = lambda: True
self.loop.add_reader(1, cb)

Expand All @@ -192,8 +192,8 @@ def test_add_reader(self):
def test_add_reader_existing(self):
reader = mock.Mock()
writer = mock.Mock()
self.loop._selector.get_key.return_value = selectors.SelectorKey(
1, 1, selectors.EVENT_WRITE, (reader, writer))
self.loop._selector.get_map.return_value = {1: selectors.SelectorKey(
1, 1, selectors.EVENT_WRITE, (reader, writer))}
cb = lambda: True
self.loop.add_reader(1, cb)

Expand All @@ -208,8 +208,8 @@ def test_add_reader_existing(self):

def test_add_reader_existing_writer(self):
writer = mock.Mock()
self.loop._selector.get_key.return_value = selectors.SelectorKey(
1, 1, selectors.EVENT_WRITE, (None, writer))
self.loop._selector.get_map.return_value = {1: selectors.SelectorKey(
1, 1, selectors.EVENT_WRITE, (None, writer))}
cb = lambda: True
self.loop.add_reader(1, cb)

Expand All @@ -222,18 +222,18 @@ def test_add_reader_existing_writer(self):
self.assertEqual(writer, w)

def test_remove_reader(self):
self.loop._selector.get_key.return_value = selectors.SelectorKey(
1, 1, selectors.EVENT_READ, (None, None))
self.loop._selector.get_map.return_value = {1: selectors.SelectorKey(
1, 1, selectors.EVENT_READ, (None, None))}
self.assertFalse(self.loop.remove_reader(1))

self.assertTrue(self.loop._selector.unregister.called)

def test_remove_reader_read_write(self):
reader = mock.Mock()
writer = mock.Mock()
self.loop._selector.get_key.return_value = selectors.SelectorKey(
self.loop._selector.get_map.return_value = {1: selectors.SelectorKey(
1, 1, selectors.EVENT_READ | selectors.EVENT_WRITE,
(reader, writer))
(reader, writer))}
self.assertTrue(
self.loop.remove_reader(1))

Expand All @@ -243,12 +243,12 @@ def test_remove_reader_read_write(self):
self.loop._selector.modify.call_args[0])

def test_remove_reader_unknown(self):
self.loop._selector.get_key.side_effect = KeyError
self.loop._selector.get_map.return_value = {}
self.assertFalse(
self.loop.remove_reader(1))

def test_add_writer(self):
self.loop._selector.get_key.side_effect = KeyError
self.loop._selector.get_map.return_value = {}
cb = lambda: True
self.loop.add_writer(1, cb)

Expand All @@ -262,8 +262,8 @@ def test_add_writer(self):
def test_add_writer_existing(self):
reader = mock.Mock()
writer = mock.Mock()
self.loop._selector.get_key.return_value = selectors.SelectorKey(
1, 1, selectors.EVENT_READ, (reader, writer))
self.loop._selector.get_map.return_value = {1: selectors.SelectorKey(
1, 1, selectors.EVENT_READ, (reader, writer))}
cb = lambda: True
self.loop.add_writer(1, cb)

Expand All @@ -277,18 +277,18 @@ def test_add_writer_existing(self):
self.assertEqual(cb, w._callback)

def test_remove_writer(self):
self.loop._selector.get_key.return_value = selectors.SelectorKey(
1, 1, selectors.EVENT_WRITE, (None, None))
self.loop._selector.get_map.return_value = {1: selectors.SelectorKey(
1, 1, selectors.EVENT_WRITE, (None, None))}
self.assertFalse(self.loop.remove_writer(1))

self.assertTrue(self.loop._selector.unregister.called)

def test_remove_writer_read_write(self):
reader = mock.Mock()
writer = mock.Mock()
self.loop._selector.get_key.return_value = selectors.SelectorKey(
self.loop._selector.get_map.return_value = {1: selectors.SelectorKey(
1, 1, selectors.EVENT_READ | selectors.EVENT_WRITE,
(reader, writer))
(reader, writer))}
self.assertTrue(
self.loop.remove_writer(1))

Expand All @@ -298,7 +298,7 @@ def test_remove_writer_read_write(self):
self.loop._selector.modify.call_args[0])

def test_remove_writer_unknown(self):
self.loop._selector.get_key.side_effect = KeyError
self.loop._selector.get_map.return_value = {}
self.assertFalse(
self.loop.remove_writer(1))

Expand Down
1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2023-07-07-18-22-07.gh-issue-106527.spHQ0W.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Reduce overhead to add and remove asyncio readers and writers