defmodule Beamchmark.Formatters.Console do
@moduledoc """
The module formats `#{inspect(Beamchmark.Suite)}` and outputs it using `Mix.shell/0`.
"""
@behaviour Beamchmark.Formatter
alias Beamchmark.{Suite, Math}
alias Beamchmark.Suite.{Configuration, Measurements, SystemInfo}
@precision 2
@impl true
def format(%Suite{} = suite, _options) do
system_info = format_system_info(suite.system_info)
configuration = format_configuration(suite.configuration)
measurements = format_measurements(suite.measurements)
Enum.join([system_info, configuration, measurements], "\n")
end
@impl true
def format(%Suite{} = new_suite, %Suite{} = base_suite, _options) do
system_info = format_system_info(new_suite.system_info)
configuration = format_configuration(new_suite.configuration)
base_measurements = format_measurements(base_suite.measurements)
diff_measurements = Measurements.diff(base_suite.measurements, new_suite.measurements)
new_measurements = format_measurements(new_suite.measurements, diff_measurements)
Enum.join([system_info, configuration, base_measurements, new_measurements], "\n")
end
@impl true
def write(data, _options) do
Mix.shell().info(data)
end
defp format_system_info(%SystemInfo{} = system_info) do
"""
#{section_header("System info")}
Elixir version: #{system_info.elixir_version}
OTP version: #{system_info.otp_version}
OS: #{system_info.os}
System arch: #{system_info.arch}
NIF version: #{system_info.nif_version}
Cores: #{system_info.num_cores}
"""
end
defp format_configuration(%Configuration{} = configuration) do
"""
#{section_header("Configuration")}
Delay: #{inspect(configuration.delay)}s
Duration: #{inspect(configuration.duration)}s
"""
end
defp format_measurements(%Measurements{} = measurements) do
"""
#{section_header("Measurements")}
#{format_scheduler_info(measurements.scheduler_info)}
#{entry_header("Reductions")}
#{format_numbers(measurements.reductions)}
#{entry_header("Context Switches")}
#{format_numbers(measurements.context_switches)}
#{entry_header("CPU Usage Average")}
#{format_numbers(measurements.cpu_info.average_all)}%
#{entry_header("CPU Usage Per Core")}
#{format_cpu_by_core(measurements.cpu_info.average_by_core)}
"""
end
defp format_measurements(%Measurements{} = measurements, %Measurements{} = measurements_diff) do
"""
#{section_header("New measurements")}
#{format_scheduler_info(measurements.scheduler_info, measurements_diff.scheduler_info)}
#{entry_header("Reductions")}
#{format_numbers(measurements.reductions, measurements_diff.reductions)}
#{entry_header("Context Switches")}
#{format_numbers(measurements.context_switches,
measurements_diff.context_switches)}
#{entry_header("CPU Usage Average")}
#{format_cpu_average(measurements.cpu_info.average_all,
measurements_diff.cpu_info.average_all)}
#{entry_header("CPU Usage Per Core")}
#{format_cpu_by_core(measurements.cpu_info.average_by_core,
measurements_diff.cpu_info.average_by_core)}
"""
end
defp format_cpu_average(cpu_average, cpu_average_diff) do
cpu_old = cpu_average - cpu_average_diff
cpu_diff_percent = Math.percent_diff(cpu_old, cpu_average)
color = get_color(cpu_average_diff)
"#{format_numbers(cpu_average)}% #{color} #{format_numbers(cpu_average_diff)}% #{format_numbers(cpu_diff_percent)}#{if cpu_diff_percent != :nan, do: "%"}#{IO.ANSI.reset()}"
end
defp format_scheduler_info(%Measurements.SchedulerInfo{} = scheduler_info) do
"""
#{entry_header("Normal schedulers")}
#{format_scheduler_entry(scheduler_info.normal)}
Total: #{format_scheduler_entry(scheduler_info.total_normal)}
#{entry_header("CPU schedulers")}
#{format_scheduler_entry(scheduler_info.cpu)}
Total: #{format_scheduler_entry(scheduler_info.total_cpu)}
#{entry_header("IO schedulers")}
#{format_scheduler_entry(scheduler_info.io)}
Total: #{format_scheduler_entry(scheduler_info.total_io)}
#{entry_header("Weighted")}
#{format_scheduler_entry(scheduler_info.weighted)}
"""
end
defp format_scheduler_info(
%Measurements.SchedulerInfo{} = scheduler_info,
%Measurements.SchedulerInfo{} = scheduler_info_diff
) do
"""
#{entry_header("Normal schedulers")}
#{format_scheduler_entry(scheduler_info.normal, scheduler_info_diff.normal)}
Total: #{format_scheduler_entry(scheduler_info.total_normal, scheduler_info_diff.total_normal)}
#{entry_header("CPU schedulers")}
#{format_scheduler_entry(scheduler_info.cpu, scheduler_info_diff.cpu)}
Total: #{format_scheduler_entry(scheduler_info.total_cpu, scheduler_info_diff.total_cpu)}
#{entry_header("IO schedulers")}
#{format_scheduler_entry(scheduler_info.io, scheduler_info_diff.io)}
Total: #{format_scheduler_entry(scheduler_info.total_io, scheduler_info_diff.total_io)}
#{entry_header("Weighted")}
#{format_scheduler_entry(scheduler_info.weighted, scheduler_info_diff.weighted)}
"""
end
defp format_scheduler_entry(sched_usage) when is_map(sched_usage) do
Enum.map_join(sched_usage, "\n", fn {sched_id, {util, percent}} ->
"#{sched_id} #{util} #{percent}%"
end)
end
# clauses for total and weighted usage
defp format_scheduler_entry({util, percent}) do
"#{util} #{percent}%"
end
defp format_cpu_by_core(cpu_by_core) do
Enum.map_join(cpu_by_core, "\n", fn {core_id, usage} ->
"Core: #{core_id} -> #{format_numbers(usage)} %"
end)
end
defp format_cpu_by_core(cpu_by_core, cpu_by_core_diff) do
Enum.map_join(cpu_by_core, "\n", fn {core_id, usage} ->
usage_diff = Map.get(cpu_by_core_diff, core_id)
usage_old = usage - usage_diff
usage_diff_percent = Math.percent_diff(usage_old, usage)
color = get_color(usage_diff)
"Core #{core_id} -> #{format_numbers(usage)}% #{color} #{format_numbers(usage_diff)} #{format_numbers(usage_diff_percent)} #{if usage_diff_percent != :nan, do: "%"}#{IO.ANSI.reset()}"
end)
end
defp format_scheduler_entry(sched_usage, sched_usage_diff)
when is_map(sched_usage) and is_map(sched_usage_diff) do
Enum.map_join(sched_usage, "\n", fn {sched_id, {util, percent}} ->
{util_diff, percent_diff} = Map.get(sched_usage_diff, sched_id)
color = get_color(percent_diff)
"#{sched_id} #{util} #{percent}% #{color} #{util_diff} #{percent_diff}#{if percent_diff != :nan, do: "%"}#{IO.ANSI.reset()}"
end)
end
defp format_scheduler_entry({util, percent}, {util_diff, percent_diff}) do
color = get_color(util_diff)
"#{util} #{percent}% #{color} #{util_diff} #{percent_diff}#{if percent_diff != :nan, do: "%"}#{IO.ANSI.reset()}"
end
defp format_numbers(number) when is_integer(number), do: "#{number}"
defp format_numbers(float_value) when is_float(float_value) do
Float.round(float_value, @precision)
end
defp format_numbers(number, number_diff) when is_integer(number) and is_integer(number_diff) do
color = get_color(number_diff)
# old number = number - number_diff
percent_diff = Math.percent_diff(number - number_diff, number)
"#{number} #{color} #{number_diff} #{percent_diff}#{if percent_diff != :nan, do: "%"}#{IO.ANSI.reset()}"
end
defp section_header(text) do
"""
================
#{String.upcase(text)}
================
"""
|> String.trim()
end
defp entry_header(text) do
"""
#{text}
--------------------
"""
|> String.trim()
end
defp get_color(diff) do
cond do
diff < 0 -> IO.ANSI.green()
diff == 0 -> IO.ANSI.white()
diff > 0 -> IO.ANSI.red()
end
end
end
