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Refactor logcontext resource usage tracking (#3501)

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Factor out the resource usage tracking out to a separate object, which can be
passed around and copied independently of the logcontext itself.
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Richard van der Hoff 2018-07-10 13:56:07 +01:00 • committed by GitHub
parent 16b10666e7
commit 55370331da
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5 changed files with 146 additions and 130 deletions
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25
synapse/util/metrics.py
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@ -60,10 +60,9 @@ def measure_func(name):
class Measure(object):
__slots__ = [
"clock", "name", "start_context", "start", "new_context", "ru_utime",
"ru_stime",
"db_txn_count", "db_txn_duration_sec", "db_sched_duration_sec",
"clock", "name", "start_context", "start",
"created_context",
"start_usage",
]
def __init__(self, clock, name):
@ -81,10 +80,7 @@ class Measure(object):
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_sec = self.start_context.db_txn_duration_sec
self.db_sched_duration_sec = self.start_context.db_sched_duration_sec
self.start_usage = self.start_context.get_resource_usage()
def __exit__(self, exc_type, exc_val, exc_tb):
if isinstance(exc_type, Exception) or not self.start_context:
@ -108,15 +104,12 @@ class Measure(object):
logger.warn("Expected context. (%r)", self.name)
return
ru_utime, ru_stime = context.get_resource_usage()
block_ru_utime.labels(self.name).inc(ru_utime - self.ru_utime)
block_ru_stime.labels(self.name).inc(ru_stime - self.ru_stime)
block_db_txn_count.labels(self.name).inc(context.db_txn_count - self.db_txn_count)
block_db_txn_duration.labels(self.name).inc(
context.db_txn_duration_sec - self.db_txn_duration_sec)
block_db_sched_duration.labels(self.name).inc(
context.db_sched_duration_sec - self.db_sched_duration_sec)
usage = context.get_resource_usage() - self.start_usage
block_ru_utime.labels(self.name).inc(usage.ru_utime)
block_ru_stime.labels(self.name).inc(usage.ru_stime)
block_db_txn_count.labels(self.name).inc(usage.db_txn_count)
block_db_txn_duration.labels(self.name).inc(usage.db_txn_duration_sec)
block_db_sched_duration.labels(self.name).inc(usage.db_sched_duration_sec)
if self.created_context:
self.start_context.__exit__(exc_type, exc_val, exc_tb)