diff --git a/synapse/util/logcontext.py b/synapse/util/logcontext.py
index 7e6062c1b8..d528ced55a 100644
--- a/synapse/util/logcontext.py
+++ b/synapse/util/logcontext.py
@@ -19,6 +19,25 @@ import logging
logger = logging.getLogger(__name__)
+try:
+ import resource
+
+ # Python doesn't ship with a definition of RUSAGE_THREAD but it's defined
+ # to be 1 on linux so we hard code it.
+ RUSAGE_THREAD = 1
+
+ # If the system doesn't support RUSAGE_THREAD then this should throw an
+ # exception.
+ resource.getrusage(RUSAGE_THREAD)
+
+ def get_thread_resource_usage():
+ return resource.getrusage(RUSAGE_THREAD)
+except:
+ # If the system doesn't support resource.getrusage(RUSAGE_THREAD) then we
+ # won't track resource usage by returning None.
+ def get_thread_resource_usage():
+ return None
+
class LoggingContext(object):
"""Additional context for log formatting. Contexts are scoped within a
@@ -27,7 +46,9 @@ class LoggingContext(object):
name (str): Name for the context for debugging.
"""
- __slots__ = ["parent_context", "name", "__dict__"]
+ __slots__ = [
+ "parent_context", "name", "usage_start", "usage_end", "main_thread", "__dict__"
+ ]
thread_local = threading.local()
@@ -42,11 +63,26 @@ class LoggingContext(object):
def copy_to(self, record):
pass
+ def start(self):
+ pass
+
+ def stop(self):
+ pass
+
+ def add_database_transaction(self, duration_ms):
+ pass
+
sentinel = Sentinel()
def __init__(self, name=None):
self.parent_context = None
self.name = name
+ self.ru_stime = 0.
+ self.ru_utime = 0.
+ self.db_txn_count = 0
+ self.db_txn_duration = 0.
+ self.usage_start = None
+ self.main_thread = threading.current_thread()
def __str__(self):
return "%s@%x" % (self.name, id(self))
@@ -56,12 +92,26 @@ class LoggingContext(object):
"""Get the current logging context from thread local storage"""
return getattr(cls.thread_local, "current_context", cls.sentinel)
+ @classmethod
+ def set_current_context(cls, context):
+ """Set the current logging context in thread local storage
+ Args:
+ context(LoggingContext): The context to activate.
+ Returns:
+ The context that was previously active
+ """
+ current = cls.current_context()
+ if current is not context:
+ current.stop()
+ cls.thread_local.current_context = context
+ context.start()
+ return current
+
def __enter__(self):
"""Enters this logging context into thread local storage"""
if self.parent_context is not None:
raise Exception("Attempt to enter logging context multiple times")
- self.parent_context = self.current_context()
- self.thread_local.current_context = self
+ self.parent_context = self.set_current_context(self)
return self
def __exit__(self, type, value, traceback):
@@ -70,16 +120,16 @@ class LoggingContext(object):
Returns:
None to avoid suppressing any exeptions that were thrown.
"""
- if self.thread_local.current_context is not self:
- if self.thread_local.current_context is self.sentinel:
+ current = self.set_current_context(self.parent_context)
+ if current is not self:
+ if current is self.sentinel:
logger.debug("Expected logging context %s has been lost", self)
else:
logger.warn(
"Current logging context %s is not expected context %s",
- self.thread_local.current_context,
+ current,
self
)
- self.thread_local.current_context = self.parent_context
self.parent_context = None
def __getattr__(self, name):
@@ -93,6 +143,43 @@ class LoggingContext(object):
for key, value in self.__dict__.items():
setattr(record, key, value)
+ record.ru_utime, record.ru_stime = self.get_resource_usage()
+
+ def start(self):
+ if threading.current_thread() is not self.main_thread:
+ return
+
+ if self.usage_start and self.usage_end:
+ self.ru_utime += self.usage_end.ru_utime - self.usage_start.ru_utime
+ self.ru_stime += self.usage_end.ru_stime - self.usage_start.ru_stime
+ self.usage_start = None
+ self.usage_end = None
+
+ if not self.usage_start:
+ self.usage_start = get_thread_resource_usage()
+
+ def stop(self):
+ if threading.current_thread() is not self.main_thread:
+ return
+
+ if self.usage_start:
+ self.usage_end = get_thread_resource_usage()
+
+ def get_resource_usage(self):
+ ru_utime = self.ru_utime
+ ru_stime = self.ru_stime
+
+ if self.usage_start and threading.current_thread() is self.main_thread:
+ current = get_thread_resource_usage()
+ ru_utime += current.ru_utime - self.usage_start.ru_utime
+ ru_stime += current.ru_stime - self.usage_start.ru_stime
+
+ return ru_utime, ru_stime
+
+ def add_database_transaction(self, duration_ms):
+ self.db_txn_count += 1
+ self.db_txn_duration += duration_ms / 1000.
+
class LoggingContextFilter(logging.Filter):
"""Logging filter that adds values from the current logging context to each
@@ -121,17 +208,20 @@ class PreserveLoggingContext(object):
exited. Used to restore the context after a function using
@defer.inlineCallbacks is resumed by a callback from the reactor."""
- __slots__ = ["current_context"]
+ __slots__ = ["current_context", "new_context"]
+
+ def __init__(self, new_context=LoggingContext.sentinel):
+ self.new_context = new_context
def __enter__(self):
"""Captures the current logging context"""
- self.current_context = LoggingContext.current_context()
- LoggingContext.thread_local.current_context = LoggingContext.sentinel
+ self.current_context = LoggingContext.set_current_context(
+ self.new_context
+ )
def __exit__(self, type, value, traceback):
"""Restores the current logging context"""
- LoggingContext.thread_local.current_context = self.current_context
-
+ LoggingContext.set_current_context(self.current_context)
if self.current_context is not LoggingContext.sentinel:
if self.current_context.parent_context is None:
logger.warn(
@@ -164,8 +254,7 @@ class _PreservingContextDeferred(defer.Deferred):
def _wrap_callback(self, f):
def g(res, *args, **kwargs):
- with PreserveLoggingContext():
- LoggingContext.thread_local.current_context = self._log_context
+ with PreserveLoggingContext(self._log_context):
res = f(res, *args, **kwargs)
return res
return g
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