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https://github.com/wahyd4/gitlabhq.git
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Robert SpeicherandRobert Speicher
a64b7cd3ba
Use clock_gettime for all performance timestamps
This MR adjusts the performance monitoring code to use `Process.clock_gettime` (thus `clock_gettime(3)`) instead of `Time.now`.
Using `Time.now` / `Time.new` adds more overhead than `Process.clock_gettime`, it also doesn't provide a way of getting timestamps in nanoseconds (which `Process.clock_gettime` does allow).
See merge request !4899
(cherry picked from commit 53ad9522c4)
63 lines
1.7 KiB
Ruby
63 lines
1.7 KiB
Ruby
module Gitlab
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module Metrics
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# Module for gathering system/process statistics such as the memory usage.
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#
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# This module relies on the /proc filesystem being available. If /proc is
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# not available the methods of this module will be stubbed.
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module System
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if File.exist?('/proc')
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# Returns the current process' memory usage in bytes.
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def self.memory_usage
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mem = 0
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match = File.read('/proc/self/status').match(/VmRSS:\s+(\d+)/)
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if match and match[1]
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mem = match[1].to_f * 1024
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end
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mem
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end
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def self.file_descriptor_count
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Dir.glob('/proc/self/fd/*').length
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end
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else
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def self.memory_usage
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0.0
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end
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def self.file_descriptor_count
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0
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end
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end
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# THREAD_CPUTIME is not supported on OS X
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if Process.const_defined?(:CLOCK_THREAD_CPUTIME_ID)
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def self.cpu_time
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Process.
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clock_gettime(Process::CLOCK_THREAD_CPUTIME_ID, :millisecond).to_f
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end
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else
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def self.cpu_time
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Process.
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clock_gettime(Process::CLOCK_PROCESS_CPUTIME_ID, :millisecond).to_f
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end
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end
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# Returns the current real time in a given precision.
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#
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# Returns the time as a Float.
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def self.real_time(precision = :millisecond)
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Process.clock_gettime(Process::CLOCK_REALTIME, precision).to_f
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end
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# Returns the current monotonic clock time in a given precision.
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#
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# Returns the time as a Float.
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def self.monotonic_time(precision = :millisecond)
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Process.clock_gettime(Process::CLOCK_MONOTONIC, precision).to_f
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end
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end
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end
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end
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