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fed server: process PDUs for different rooms in parallel

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With luck, this will give a real-time improvement when there are many rooms and
the server ends up calling out to fetch missing events.
This commit is contained in:
Richard van der Hoff 2017-10-06 16:07:20 +01:00
parent 4c7c4d4061
commit 6a6cc27aee
1 changed files with 34 additions and 19 deletions
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35
synapse/federation/federation_server.py
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@ -12,14 +12,12 @@
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and # See the License for the specific language governing permissions and
# limitations under the License. # limitations under the License.
from twisted.internet import defer from twisted.internet import defer
from .federation_base import FederationBase from .federation_base import FederationBase
from .units import Transaction, Edu from .units import Transaction, Edu
from synapse.util.async import Linearizer from synapse.util import async
from synapse.util.logutils import log_function from synapse.util.logutils import log_function
from synapse.util.caches.response_cache import ResponseCache from synapse.util.caches.response_cache import ResponseCache
from synapse.events import FrozenEvent from synapse.events import FrozenEvent
@ -33,6 +31,9 @@ from synapse.crypto.event_signing import compute_event_signature
import simplejson as json import simplejson as json
import logging import logging
# when processing incoming transactions, we try to handle multiple rooms in
# parallel, up to this limit.
TRANSACTION_CONCURRENCY_LIMIT = 10
logger = logging.getLogger(__name__) logger = logging.getLogger(__name__)
@ -52,8 +53,8 @@ class FederationServer(FederationBase):
self.auth = hs.get_auth() self.auth = hs.get_auth()
self._server_linearizer = Linearizer("fed_server") self._server_linearizer = async.Linearizer("fed_server")
self._transaction_linearizer = Linearizer("fed_txn_handler") self._transaction_linearizer = async.Linearizer("fed_txn_handler")
# We cache responses to state queries, as they take a while and often # We cache responses to state queries, as they take a while and often
# come in waves. # come in waves.
@ -159,7 +160,7 @@ class FederationServer(FederationBase):
received_pdus_counter.inc_by(len(transaction.pdus)) received_pdus_counter.inc_by(len(transaction.pdus))
pdu_list = [] pdus_by_room = {}
for p in transaction.pdus: for p in transaction.pdus:
if "unsigned" in p: if "unsigned" in p:
@ -171,14 +172,23 @@ class FederationServer(FederationBase):
del p["age"] del p["age"]
event = self.event_from_pdu_json(p) event = self.event_from_pdu_json(p)
pdu_list.append(event) room_id = event.room_id
pdus_by_room.setdefault(room_id, []).append(event)
pdu_results = {} pdu_results = {}
for pdu in pdu_list: # we can process different rooms in parallel (which is useful if they
# require callouts to other servers to fetch missing events), but
# impose a limit to avoid going too crazy with ram/cpu.
@defer.inlineCallbacks
def process_pdus_for_room(room_id):
logger.debug("Processing PDUs for %s", room_id)
for pdu in pdus_by_room[room_id]:
event_id = pdu.event_id event_id = pdu.event_id
try: try:
yield self._handle_received_pdu(transaction.origin, pdu) yield self._handle_received_pdu(
transaction.origin, pdu
)
pdu_results[event_id] = {} pdu_results[event_id] = {}
except FederationError as e: except FederationError as e:
logger.warn("Error handling PDU %s: %s", event_id, e) logger.warn("Error handling PDU %s: %s", event_id, e)
@ -186,7 +196,12 @@ class FederationServer(FederationBase):
pdu_results[event_id] = {"error": str(e)} pdu_results[event_id] = {"error": str(e)}
except Exception as e: except Exception as e:
pdu_results[event_id] = {"error": str(e)} pdu_results[event_id] = {"error": str(e)}
logger.exception("Failed to handle PDU") logger.exception("Failed to handle PDU %s", event_id)
yield async.concurrently_execute(
process_pdus_for_room, pdus_by_room.keys(),
TRANSACTION_CONCURRENCY_LIMIT,
)
if hasattr(transaction, "edus"): if hasattr(transaction, "edus"):
for edu in (Edu(**x) for x in transaction.edus): for edu in (Edu(**x) for x in transaction.edus):