From 5583e29513f1f67012b98b430670d645928d4195 Mon Sep 17 00:00:00 2001 From: "Paul \"LeoNerd\" Evans" Date: Wed, 1 Apr 2015 19:04:55 +0100 Subject: [PATCH] Report process open filehandles in metrics --- synapse/metrics/__init__.py | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py index dffb8a486..6564b03ee 100644 --- a/synapse/metrics/__init__.py +++ b/synapse/metrics/__init__.py @@ -18,6 +18,8 @@ from __future__ import absolute_import import logging from resource import getrusage, getpagesize, RUSAGE_SELF +import os +import stat from .metric import ( CounterMetric, CallbackMetric, DistributionMetric, CacheMetric @@ -109,3 +111,35 @@ resource_metrics.register_callback("stime", lambda: rusage.ru_stime * 1000) # pages resource_metrics.register_callback("maxrss", lambda: rusage.ru_maxrss * PAGE_SIZE) + +TYPES = { + stat.S_IFSOCK: "SOCK", + stat.S_IFLNK: "LNK", + stat.S_IFREG: "REG", + stat.S_IFBLK: "BLK", + stat.S_IFDIR: "DIR", + stat.S_IFCHR: "CHR", + stat.S_IFIFO: "FIFO", +} + +def _process_fds(): + counts = {(k,): 0 for k in TYPES.values()} + counts[("other",)] = 0 + + for fd in os.listdir("/proc/self/fd"): + try: + s = os.stat("/proc/self/fd/%s" % (fd)) + fmt = stat.S_IFMT(s.st_mode) + if fmt in TYPES: + t = TYPES[fmt] + else: + t = "other" + + counts[(t,)] += 1 + except OSError: + # the dirh itself used by listdir() is usually missing by now + pass + + return counts + +get_metrics_for("process").register_callback("fds", _process_fds, labels=["type"])