module Gitlab module Metrics # Module for gathering system/process statistics such as the memory usage. # # This module relies on the /proc filesystem being available. If /proc is # not available the methods of this module will be stubbed. module System if File.exist?('/proc') # Returns the current process' memory usage in bytes. def self.memory_usage mem = 0 match = File.read('/proc/self/status').match(/VmRSS:\s+(\d+)/) if match && match[1] mem = match[1].to_f * 1024 end mem end def self.file_descriptor_count Dir.glob('/proc/self/fd/*').length end else def self.memory_usage 0.0 end def self.file_descriptor_count 0 end end # THREAD_CPUTIME is not supported on OS X if Process.const_defined?(:CLOCK_THREAD_CPUTIME_ID) def self.cpu_time Process. clock_gettime(Process::CLOCK_THREAD_CPUTIME_ID, :millisecond) end else def self.cpu_time Process. clock_gettime(Process::CLOCK_PROCESS_CPUTIME_ID, :millisecond) end end # Returns the current real time in a given precision. # # Returns the time as a Float. def self.real_time(precision = :millisecond) Process.clock_gettime(Process::CLOCK_REALTIME, precision) end # Returns the current monotonic clock time in a given precision. # # Returns the time as a Float. def self.monotonic_time(precision = :millisecond) Process.clock_gettime(Process::CLOCK_MONOTONIC, precision) end end end end