diff options
Diffstat (limited to 'synapse/util/logcontext.py')
| -rw-r--r-- | synapse/util/logcontext.py | 108 |
1 files changed, 94 insertions, 14 deletions
diff --git a/synapse/util/logcontext.py b/synapse/util/logcontext.py index 7e6062c1b8..c20c89aa8f 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 +63,21 @@ class LoggingContext(object): def copy_to(self, record): pass + def start(self): + pass + + def stop(self): + pass + sentinel = Sentinel() def __init__(self, name=None): self.parent_context = None self.name = name + self.ru_stime = 0. + self.ru_utime = 0. + self.usage_start = None + self.main_thread = threading.current_thread() def __str__(self): return "%s@%x" % (self.name, id(self)) @@ -56,12 +87,26 @@ 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 +115,16 @@ 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 +138,39 @@ 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 + class LoggingContextFilter(logging.Filter): """Logging filter that adds values from the current logging context to each @@ -121,17 +199,20 @@ 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 +245,7 @@ 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 |