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Use /proc/self/stat to generate the new process_cpu_*_seconds_total metrics

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This commit is contained in:
Paul "LeoNerd" Evans 2016-10-19 14:10:03 +01:00
parent 03c2720940
commit 9b0316c75a
1 changed files with 12 additions and 4 deletions
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16
synapse/metrics/__init__.py
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@ -112,13 +112,21 @@ def render_all():
# Now register some standard process-wide state metrics, to give indications of
# process resource usage
rusage = None
TICKS_PER_SEC = 100
rusage = None
stats = None
def update_resource_metrics():
global rusage
rusage = getrusage(RUSAGE_SELF)
global stats
with open("/proc/self/stat") as s:
line = s.read()
# line is PID (command) more stats go here ...
stats = line.split(") ", 1)[1].split(" ")
## Legacy synapse-invented metric names
resource_metrics = get_metrics_for("process.resource")
@ -171,13 +179,13 @@ get_metrics_for("process").register_callback("fds", _process_fds, labels=["type"
process_metrics = get_metrics_for("process");
process_metrics.register_callback(
"cpu_user_seconds_total", lambda: rusage.ru_utime
"cpu_user_seconds_total", lambda: float(stats[11]) / TICKS_PER_SEC
)
process_metrics.register_callback(
"cpu_system_seconds_total", lambda: rusage.ru_stime
"cpu_system_seconds_total", lambda: float(stats[12]) / TICKS_PER_SEC
)
process_metrics.register_callback(
"cpu_seconds_total", lambda: rusage.ru_utime + rusage.ru_stime
"cpu_seconds_total", lambda: (float(stats[11]) + float(stats[12])) / TICKS_PER_SEC
)
reactor_metrics = get_metrics_for("reactor")