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require 'benchmark_driver/struct'
require 'benchmark_driver/metric'
require 'erb'
# A special runner dedicated for measuring mjit_exec overhead.
class BenchmarkDriver::Runner::MjitExec
METRIC = BenchmarkDriver::Metric.new(name: 'Iteration per second', unit: 'i/s')
# JobParser returns this, `BenchmarkDriver::Runner.runner_for` searches "*::Job"
Job = ::BenchmarkDriver::Struct.new(
:name, # @param [String] name - This is mandatory for all runner
:metrics, # @param [Array<BenchmarkDriver::Metric>]
:num_methods, # @param [Integer] num_methods - The number of methods to be defined
:loop_count, # @param [Integer] loop_count
:from_jit, # @param [TrueClass,FalseClass] from_jit - Whether the mjit_exec() is from JIT or not
:to_jit, # @param [TrueClass,FalseClass] to_jit - Whether the mjit_exec() is to JIT or not
)
# Dynamically fetched and used by `BenchmarkDriver::JobParser.parse`
class << JobParser = Module.new
# @param [Array,String] num_methods
# @param [Integer] loop_count
# @param [TrueClass,FalseClass] from_jit
# @param [TrueClass,FalseClass] to_jit
def parse(num_methods:, loop_count:, from_jit:, to_jit:)
if num_methods.is_a?(String)
num_methods = eval(num_methods)
end
num_methods.map do |num|
if num_methods.size > 1
suffix = "[#{'%4d' % num}]"
else
suffix = "_#{num}"
end
Job.new(
name: "mjit_exec_#{from_jit ? 'JT' : 'VM'}2#{to_jit ? 'JT' : 'VM'}#{suffix}",
metrics: [METRIC],
num_methods: num,
loop_count: loop_count,
from_jit: from_jit,
to_jit: to_jit,
)
end
end
end
# @param [BenchmarkDriver::Config::RunnerConfig] config
# @param [BenchmarkDriver::Output] output
# @param [BenchmarkDriver::Context] contexts
def initialize(config:, output:, contexts:)
@config = config
@output = output
@contexts = contexts
end
# This method is dynamically called by `BenchmarkDriver::JobRunner.run`
# @param [Array<BenchmarkDriver::Runner::Peak::Job>] jobs
def run(jobs)
@output.with_benchmark do
jobs.each do |job|
@output.with_job(name: job.name) do
@contexts.each do |context|
result = BenchmarkDriver::Repeater.with_repeat(config: @config, larger_better: true, rest_on_average: :average) do
run_benchmark(job, context: context)
end
value, duration = result.value
@output.with_context(name: context.name, executable: context.executable, gems: context.gems, prelude: context.prelude) do
@output.report(values: { METRIC => value }, duration: duration, loop_count: job.loop_count)
end
end
end
end
end
end
private
# @param [BenchmarkDriver::Runner::Ips::Job] job - loop_count is not nil
# @param [BenchmarkDriver::Context] context
# @return [BenchmarkDriver::Metrics]
def run_benchmark(job, context:)
if job.from_jit
if job.to_jit
benchmark = BenchmarkJT2JT.new(num_methods: job.num_methods, loop_count: job.loop_count)
else
raise NotImplementedError, "JT2VM is not implemented yet"
end
else
if job.to_jit
benchmark = BenchmarkVM2JT.new(num_methods: job.num_methods, loop_count: job.loop_count)
else
benchmark = BenchmarkVM2VM.new(num_methods: job.num_methods, loop_count: job.loop_count)
end
end
duration = Tempfile.open(['benchmark_driver-result', '.txt']) do |f|
with_script(benchmark.render(result: f.path)) do |path|
opt = []
if context.executable.command.any? { |c| c.start_with?('--jit') }
opt << '--jit-min-calls=2'
end
IO.popen([*context.executable.command, '--disable-gems', *opt, path], &:read)
if $?.success?
Float(f.read)
else
BenchmarkDriver::Result::ERROR
end
end
end
[job.loop_count.to_f / duration, duration]
end
def with_script(script)
if @config.verbose >= 2
sep = '-' * 30
$stdout.puts "\n\n#{sep}[Script begin]#{sep}\n#{script}#{sep}[Script end]#{sep}\n\n"
end
Tempfile.open(['benchmark_driver-', '.rb']) do |f|
f.puts script
f.close
return yield(f.path)
end
end
# @param [Integer] num_methods
# @param [Integer] loop_count
BenchmarkVM2VM = ::BenchmarkDriver::Struct.new(:num_methods, :loop_count) do
# @param [String] result - A file to write result
def render(result:)
ERB.new(<<~EOS, trim_mode: '%').result(binding)
% num_methods.times do |i|
def a<%= i %>
nil
end
% end
RubyVM::MJIT.pause if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
def vm
t = Process.clock_gettime(Process::CLOCK_MONOTONIC)
i = 0
while i < <%= loop_count / 1000 %>
% 1000.times do |i|
a<%= i % num_methods %>
% end
i += 1
end
% (loop_count % 1000).times do |i|
a<%= i % num_methods %>
% end
Process.clock_gettime(Process::CLOCK_MONOTONIC) - t
end
vm # warmup call cache
File.write(<%= result.dump %>, vm)
EOS
end
end
private_constant :BenchmarkVM2VM
# @param [Integer] num_methods
# @param [Integer] loop_count
BenchmarkVM2JT = ::BenchmarkDriver::Struct.new(:num_methods, :loop_count) do
# @param [String] result - A file to write result
def render(result:)
ERB.new(<<~EOS, trim_mode: '%').result(binding)
% num_methods.times do |i|
def a<%= i %>
nil
end
a<%= i %>
a<%= i %> # --jit-min-calls=2
% end
RubyVM::MJIT.pause if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
def vm
t = Process.clock_gettime(Process::CLOCK_MONOTONIC)
i = 0
while i < <%= loop_count / 1000 %>
% 1000.times do |i|
a<%= i % num_methods %>
% end
i += 1
end
% (loop_count % 1000).times do |i|
a<%= i % num_methods %>
% end
Process.clock_gettime(Process::CLOCK_MONOTONIC) - t
end
vm # warmup call cache
File.write(<%= result.dump %>, vm)
EOS
end
end
private_constant :BenchmarkVM2JT
# @param [Integer] num_methods
# @param [Integer] loop_count
BenchmarkJT2JT = ::BenchmarkDriver::Struct.new(:num_methods, :loop_count) do
# @param [String] result - A file to write result
def render(result:)
ERB.new(<<~EOS, trim_mode: '%').result(binding)
% num_methods.times do |i|
def a<%= i %>
nil
end
% end
# You may need to:
# * Increase `JIT_ISEQ_SIZE_THRESHOLD` to 10000000 in mjit.h
# * Always return false in `inlinable_iseq_p()` of mjit_compile.c
def jit
t = Process.clock_gettime(Process::CLOCK_MONOTONIC)
i = 0
while i < <%= loop_count / 1000 %>
% 1000.times do |i|
a<%= i % num_methods %>
% end
i += 1
end
% (loop_count % 1000).times do |i|
a<%= i % num_methods %>
% end
Process.clock_gettime(Process::CLOCK_MONOTONIC) - t
end
jit
jit
RubyVM::MJIT.pause if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
File.write(<%= result.dump %>, jit)
EOS
end
end
private_constant :BenchmarkJT2JT
end
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