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- # -*- coding: utf-8 -*-
- # Copyright 2016 OpenMarket Ltd
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- from twisted.internet import defer
- from synapse.util.logcontext import LoggingContext
- import synapse.metrics
- from functools import wraps
- import logging
- logger = logging.getLogger(__name__)
- metrics = synapse.metrics.get_metrics_for(__name__)
- block_timer = metrics.register_distribution(
- "block_timer",
- labels=["block_name"]
- )
- block_ru_utime = metrics.register_distribution(
- "block_ru_utime", labels=["block_name"]
- )
- block_ru_stime = metrics.register_distribution(
- "block_ru_stime", labels=["block_name"]
- )
- block_db_txn_count = metrics.register_distribution(
- "block_db_txn_count", labels=["block_name"]
- )
- block_db_txn_duration = metrics.register_distribution(
- "block_db_txn_duration", labels=["block_name"]
- )
- def measure_func(name):
- def wrapper(func):
- @wraps(func)
- @defer.inlineCallbacks
- def measured_func(self, *args, **kwargs):
- with Measure(self.clock, name):
- r = yield func(self, *args, **kwargs)
- defer.returnValue(r)
- return measured_func
- return wrapper
- class Measure(object):
- __slots__ = [
- "clock", "name", "start_context", "start", "new_context", "ru_utime",
- "ru_stime", "db_txn_count", "db_txn_duration", "created_context"
- ]
- def __init__(self, clock, name):
- self.clock = clock
- self.name = name
- self.start_context = None
- self.start = None
- self.created_context = False
- def __enter__(self):
- self.start = self.clock.time_msec()
- self.start_context = LoggingContext.current_context()
- if not self.start_context:
- self.start_context = LoggingContext("Measure")
- self.start_context.__enter__()
- self.created_context = True
- self.ru_utime, self.ru_stime = self.start_context.get_resource_usage()
- self.db_txn_count = self.start_context.db_txn_count
- self.db_txn_duration = self.start_context.db_txn_duration
- def __exit__(self, exc_type, exc_val, exc_tb):
- if isinstance(exc_type, Exception) or not self.start_context:
- return
- duration = self.clock.time_msec() - self.start
- block_timer.inc_by(duration, self.name)
- context = LoggingContext.current_context()
- if context != self.start_context:
- logger.warn(
- "Context has unexpectedly changed from '%s' to '%s'. (%r)",
- self.start_context, context, self.name
- )
- return
- if not context:
- logger.warn("Expected context. (%r)", self.name)
- return
- ru_utime, ru_stime = context.get_resource_usage()
- block_ru_utime.inc_by(ru_utime - self.ru_utime, self.name)
- block_ru_stime.inc_by(ru_stime - self.ru_stime, self.name)
- block_db_txn_count.inc_by(
- context.db_txn_count - self.db_txn_count, self.name
- )
- block_db_txn_duration.inc_by(
- context.db_txn_duration - self.db_txn_duration, self.name
- )
- if self.created_context:
- self.start_context.__exit__(exc_type, exc_val, exc_tb)
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