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Sanity-checking for metrics updates

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Check that our clocks go forward.
This commit is contained in:
Richard van der Hoff 2019-06-19 20:55:53 +01:00
parent f682af052d
commit fe641df770
1 changed files with 33 additions and 7 deletions
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40
synapse/util/logcontext.py
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@ -325,10 +325,9 @@ class LoggingContext(object):
)
return
usage_end = get_thread_resource_usage()
self._resource_usage.ru_utime += usage_end.ru_utime - self.usage_start.ru_utime
self._resource_usage.ru_stime += usage_end.ru_stime - self.usage_start.ru_stime
utime_delta, stime_delta = self._get_cputime()
self._resource_usage.ru_utime += utime_delta
self._resource_usage.ru_stime += stime_delta
self.usage_start = None
@ -346,13 +345,38 @@ class LoggingContext(object):
# can include resource usage so far.
is_main_thread = threading.current_thread() is self.main_thread
if self.alive and self.usage_start and is_main_thread:
current = get_thread_resource_usage()
res.ru_utime += current.ru_utime - self.usage_start.ru_utime
res.ru_stime += current.ru_stime - self.usage_start.ru_stime
utime_delta, stime_delta = self._get_cputime()
res.ru_utime += utime_delta
res.ru_stime += stime_delta
return res
def _get_cputime(self):
"""Get the cpu usage time so far
Returns: Tuple[float, float]: seconds in user mode, seconds in system mode
"""
current = get_thread_resource_usage()
utime_delta = current.ru_utime - self.usage_start.ru_utime
stime_delta = current.ru_stime - self.usage_start.ru_stime
# sanity check
if utime_delta < 0:
raise ValueError("utime went backwards! %f < %f" % (
current.ru_utime, self.usage_start.ru_utime,
))
if stime_delta < 0:
raise ValueError("stime went backwards! %f < %f" % (
current.ru_stime, self.usage_start.ru_stime,
))
return utime_delta, stime_delta
def add_database_transaction(self, duration_sec):
if duration_sec < 0:
raise ValueError('DB txn time can only be non-negative')
self._resource_usage.db_txn_count += 1
self._resource_usage.db_txn_duration_sec += duration_sec
@ -363,6 +387,8 @@ class LoggingContext(object):
sched_sec (float): number of seconds it took us to get a
connection
"""
if sched_sec < 0:
raise ValueError('DB scheduling time can only be non-negative')
self._resource_usage.db_sched_duration_sec += sched_sec
def record_event_fetch(self, event_count):