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Add standard process_start_time_seconds metric

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This commit is contained in:
Paul "LeoNerd" Evans 2016-10-19 15:04:52 +01:00
parent def63649df
commit 981f852d54
1 changed files with 15 additions and 0 deletions
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15
synapse/metrics/__init__.py
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@ -119,6 +119,17 @@ rusage = None
stats = None
fd_counts = None
# In order to report process_start_time_seconds we need to know the machine's
# boot time, because the value in /proc/self/stat is relative to this
boot_time = None
try:
with open("/proc/stat") as _procstat:
for line in _procstat:
if line.startswith("btime "):
boot_time = int(line.split()[1])
except IOError:
pass
TYPES = {
stat.S_IFSOCK: "SOCK",
stat.S_IFLNK: "LNK",
@ -218,6 +229,10 @@ process_metrics.register_callback(
"max_fds", lambda: _get_max_fds()
)
process_metrics.register_callback(
"start_time_seconds", lambda: boot_time + int(stats[19]) / TICKS_PER_SEC
)
reactor_metrics = get_metrics_for("reactor")
tick_time = reactor_metrics.register_distribution("tick_time")
pending_calls_metric = reactor_metrics.register_distribution("pending_calls")