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https://github.com/element-hq/synapse
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Cut the raw /proc/self/stat line up into named fields at collection time
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1 changed files with 22 additions and 8 deletions
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@ -41,9 +41,18 @@ TYPES = {
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stat.S_IFIFO: "FIFO",
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}
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# Field indexes from /proc/self/stat, taken from the proc(5) manpage
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STAT_FIELDS = {
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"utime": 14,
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"stime": 15,
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"starttime": 22,
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"vsize": 23,
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"rss": 24,
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}
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rusage = None
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stats = None
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stats = {}
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fd_counts = None
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# In order to report process_start_time_seconds we need to know the
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@ -66,7 +75,12 @@ def update_resource_metrics():
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with open("/proc/self/stat") as s:
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line = s.read()
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# line is PID (command) more stats go here ...
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stats = line.split(") ", 1)[1].split(" ")
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raw_stats = line.split(") ", 1)[1].split(" ")
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for (name, index) in STAT_FIELDS.iteritems():
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# subtract 3 from the index, because proc(5) is 1-based, and
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# we've lost the first two fields in PID and COMMAND above
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stats[name] = int(raw_stats[index - 3])
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global fd_counts
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fd_counts = _process_fds()
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@ -119,24 +133,24 @@ def register_process_collector():
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if HAVE_PROC_SELF_STAT:
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process_metrics.register_callback(
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"cpu_user_seconds_total", lambda: float(stats[11]) / TICKS_PER_SEC
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"cpu_user_seconds_total", lambda: float(stats["utime"]) / TICKS_PER_SEC
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)
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process_metrics.register_callback(
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"cpu_system_seconds_total", lambda: float(stats[12]) / TICKS_PER_SEC
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"cpu_system_seconds_total", lambda: float(stats["stime"]) / TICKS_PER_SEC
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)
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process_metrics.register_callback(
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"cpu_seconds_total", lambda: (float(stats[11]) + float(stats[12])) / TICKS_PER_SEC
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"cpu_seconds_total", lambda: (float(stats["utime"]) + float(stats["stime"])) / TICKS_PER_SEC
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)
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process_metrics.register_callback(
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"virtual_memory_bytes", lambda: int(stats[20])
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"virtual_memory_bytes", lambda: int(stats["vsize"])
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)
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process_metrics.register_callback(
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"resident_memory_bytes", lambda: int(stats[21]) * BYTES_PER_PAGE
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"resident_memory_bytes", lambda: int(stats["rss"]) * BYTES_PER_PAGE
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)
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process_metrics.register_callback(
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"start_time_seconds", lambda: boot_time + int(stats[19]) / TICKS_PER_SEC
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"start_time_seconds", lambda: boot_time + int(stats["starttime"]) / TICKS_PER_SEC
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)
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if HAVE_PROC_SELF_FD:
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