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Diffstat (limited to '')
-rw-r--r-- | synapse/util/metrics.py | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/synapse/util/metrics.py b/synapse/util/metrics.py new file mode 100644 index 0000000000..c51b641125 --- /dev/null +++ b/synapse/util/metrics.py @@ -0,0 +1,97 @@ +# -*- 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 synapse.util.logcontext import LoggingContext +import synapse.metrics + +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"] +) + + +class Measure(object): + __slots__ = [ + "clock", "name", "start_context", "start", "new_context", "ru_utime", + "ru_stime", "db_txn_count", "db_txn_duration" + ] + + def __init__(self, clock, name): + self.clock = clock + self.name = name + self.start_context = None + self.start = None + + def __enter__(self): + self.start = self.clock.time_msec() + self.start_context = LoggingContext.current_context() + if self.start_context: + 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 exc_type is not None 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 have unexpectedly changed from '%s' to '%s'. (%r)", + context, self.start_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 + ) |