72 lines
2.1 KiB
Ruby
72 lines
2.1 KiB
Ruby
# rubocop:disable Style/ClassVars
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module Gitlab
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module Metrics
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# Class for tracking timing information about method calls
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class MethodCall
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include Gitlab::Metrics::Methods
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BASE_LABELS = { module: nil, method: nil }.freeze
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attr_reader :real_time, :cpu_time, :call_count, :labels
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define_histogram :gitlab_method_call_duration_seconds do
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docstring 'Method calls real duration'
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base_labels Transaction::BASE_LABELS.merge(BASE_LABELS)
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buckets [0.01, 0.05, 0.1, 0.5, 1]
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with_feature :prometheus_metrics_method_instrumentation
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end
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# name - The full name of the method (including namespace) such as
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# `User#sign_in`.
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#
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def initialize(name, module_name, method_name, transaction)
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@module_name = module_name
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@method_name = method_name
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@transaction = transaction
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@name = name
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@labels = { module: @module_name, method: @method_name }
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@real_time = 0.0
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@cpu_time = 0.0
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@call_count = 0
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end
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# Measures the real and CPU execution time of the supplied block.
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def measure
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start_real = System.monotonic_time
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start_cpu = System.cpu_time
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retval = yield
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real_time = System.monotonic_time - start_real
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cpu_time = System.cpu_time - start_cpu
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@real_time += real_time
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@cpu_time += cpu_time
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@call_count += 1
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if above_threshold?
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self.class.gitlab_method_call_duration_seconds.observe(@transaction.labels.merge(labels), real_time)
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end
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retval
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end
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# Returns a Metric instance of the current method call.
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def to_metric
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Metric.new(
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Instrumentation.series,
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{
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duration: real_time.in_milliseconds.to_i,
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cpu_duration: cpu_time.in_milliseconds.to_i,
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call_count: call_count
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},
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method: @name
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)
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end
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# Returns true if the total runtime of this method exceeds the method call
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# threshold.
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def above_threshold?
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real_time.in_milliseconds >= Metrics.method_call_threshold
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end
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end
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end
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end
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