Add --no-sudo option to skip all operations that require sudo

When running benchmarks on machines without sudo access, the CPU
configuration (turbo boost, min_perf_pct, frequency governor) cannot be
set or verified. The --no-sudo flag skips the entire CPUConfig setup,
which includes both the sudo-dependent writes and the checks that exit
when the expected configuration isn't detected.

Author: k0kubun

lib/argument_parser.rb

@@ -19,6 +19,7 @@ class ArgumentParser
     :no_pinning,
     :force_pinning,
     :turbo,
+    :no_sudo,
     :skip_yjit,
     :skip_zjit,
     :with_pre_init,
@@ -158,6 +159,10 @@ def parse(argv)
       opts.on("--turbo", "don't disable CPU turbo boost") do
         args.turbo = true
       end
+
+      opts.on("--no-sudo", "skip all operations that require sudo") do
+        args.no_sudo = true
+      end
     end.parse!(argv)
 
     # Remaining arguments are treated as benchmark name filters
@@ -223,6 +228,7 @@ def default_args
       no_pinning: false,
       force_pinning: false,
       turbo: false,
+      no_sudo: false,
       skip_yjit: false,
       skip_zjit: true,
       with_pre_init: nil,

lib/benchmark_runner/cli.rb

@@ -21,7 +21,7 @@ def initialize(args)
     end
 
     def run
-      CPUConfig.configure_for_benchmarking(turbo: args.turbo)
+      CPUConfig.configure_for_benchmarking(turbo: args.turbo) unless args.no_sudo
 
       # Create the output directory
       FileUtils.mkdir_p(args.out_path)

test/argument_parser_test.rb

@@ -52,6 +52,7 @@ def setup_mock_ruby(path)
         assert_equal false, args.graph
         assert_equal false, args.no_pinning
         assert_equal false, args.turbo
+        assert_equal false, args.no_sudo
         assert_equal false, args.skip_yjit
       end
     end
@@ -454,6 +455,15 @@ def setup_mock_ruby(path)
       end
     end
 
+    describe '--no-sudo option' do
+      it 'sets no_sudo flag' do
+        parser = ArgumentParser.new
+        args = parser.parse(['--no-sudo'])
+
+        assert_equal true, args.no_sudo
+      end
+    end
+
     describe 'remaining arguments' do
       it 'treats remaining arguments as name filters' do
         parser = ArgumentParser.new