8000 GH-91166: zero copy SelectorSocketTransport transport implementation by kumaraditya303 · Pull Request #31871 · python/cpython · GitHub
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GH-91166: zero copy SelectorSocketTransport transport implementation #31871

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Merged
merged 23 commits into from
Dec 24, 2022
Merged

GH-91166: zero copy SelectorSocketTransport transport implementation #31871

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39b538f
zero copy transport implementation
kumaraditya303 Mar 14, 2022
abd2dc3
WIP sendmsg
kumaraditya303 Mar 15, 2022
669b661
writelines implementation
kumaraditya303 Mar 15, 2022
0692952
use sysconf
kumaraditya303 Mar 15, 2022
2725334
fix tests
kumaraditya303 Mar 15, 2022
bed096d
skip test if sendmsg does not exists
kumaraditya303 Oct 24, 2022
f090e8d
📜🤖 Added by blurb_it.
blurb-it[bot] Oct 24, 2022
d6c77cd
fix check on other platforms
kumaraditya303 Oct 24, 2022
f2ee404
rename some vars
kumaraditya303 Nov 28, 2022
effab03
_HAVE_SENDMSG -> _HAS_SENDMSG
kumaraditya303 Nov 28, 2022
e1e4362
fix tests
kumaraditya303 Nov 28, 2022
bdb1bda
fix tests
kumaraditya303 Nov 28, 2022
d1fae6c
fix writelines and add comments
kumaraditya303 Nov 28, 2022
cd45016
optimize calling
kumaraditya303 Nov 28, 2022
5b962f5
use send if sendmsg does not exists in writelines
kumaraditya303 Nov 28, 2022
85d6909
Merge branch 'main' into asyncio-zero-copy
kumaraditya303 Nov 28, 2022
152b748
Update Lib/asyncio/selector_events.py
kumaraditya303 Dec 2, 2022
2c62bcb
more tests
kumaraditya303 Dec 13, 2022
9b92cff
check fatal error
kumaraditya303 Dec 13, 2022
7e05c2c
Merge branch 'main' into asyncio-zero-copy
kumaraditya303 Dec 13, 2022
97de955
Merge branch 'asyncio-zero-copy' of https://github.com/kumaraditya303…
kumaraditya303 Dec 13, 2022
57b1ba0
Merge branch 'main' of https://github.com/python/cpython into asyncio…
kumaraditya303 Dec 22, 2022
2ca3571
code review
kumaraditya303 Dec 22, 2022
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fix writelines and add comments
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@kumaraditya303
kumaraditya303 committed Nov 28, 2022
commit d1fae6cdd3b3ba20dc5a2e2bae2f468844b8071d
8000
33 changes: 18 additions & 15 deletions Lib/asyncio/selector_events.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1080,16 +1080,16 @@ def write(self, data):
self._buffer.append(data)
self._maybe_pause_protocol()

def _get_sendmsg_buffer(self):
return itertools.islice(self._buffer, SC_IOV_MAX)
def _get_sendmsg_buffer(self, buffer: collections.deque):
return itertools.islice(buffer, SC_IOV_MAX)

def _write_sendmsg(self):
assert self._buffer, 'Data should not be empty'
if self._conn_lost:
return
try:
nbytes = self._sock.sendmsg(self._get_sendmsg_buffer())
self._adjust_leftover_buffer(nbytes)
nbytes = self._sock.sendmsg(self._get_sendmsg_buffer(self._buffer))
self._adjust_leftover_buffer(self._buffer, nbytes)
except (BlockingIOError, InterruptedError):
pass
except (SystemExit, KeyboardInterrupt):
Expand All @@ -1111,8 +1111,7 @@ def _write_sendmsg(self):
elif self._eof:
self._sock.shutdown(socket.SHUT_WR)

def _adjust_leftover_buffer(self, nbytes: int) -> None:
buffer = self._buffer
def _adjust_leftover_buffer(self, buffer: collections.deque, nbytes: int) -> None:
while nbytes:
b = buffer.popleft()
b_len = len(b)
Expand Down Expand Up @@ -1160,15 +1159,19 @@ def write_eof(self):
if not self._buffer:
self._sock.shutdown(socket.SHUT_WR)

def writelines(self, list_of_data):
if self._eof:
raise RuntimeError('Cannot call writelines() after write_eof()')
if self._empty_waiter is not None:
raise RuntimeError('unable to writelines; sendfile is in progress')
if not list_of_data:
return
self._buffer.extend([memoryview(i) for i in list_of_data])
self._loop._add_writer(self._sock_fd, self._write_ready)
if _HAS_SENDMSG:
# Use faster implementation with sendmsg() if available otherwise fallback
# to the default implementation of writelines in WriteTransport
def writelines(self, list_of_data):
if self._eof:
raise RuntimeError('Cannot call writelines() after write_eof()')
if self._empty_waiter is not None:
raise RuntimeError('unable to writelines; sendfile is in progress')
if not list_of_data:
return
self._buffer.extend([memoryview(i) for i in list_of_data])
self._write_sendmsg()


def can_write_eof(self):
return True
Expand Down
0