initial separation of RubyProf-specific code

1 files changed, 236 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/testing/performance/mri.rb b/activesupport/lib/active_support/testing/performance/mri.rb
new file mode 100644
index 0000000000..cfa48890dc
--- /dev/null
+++ b/activesupport/lib/active_support/testing/performance/mri.rb
@@ -0,0 +1,236 @@
+begin
+  require 'ruby-prof'
+rescue LoadError
+  $stderr.puts "Specify ruby-prof as application's dependency in Gemfile to run benchmarks."
+  exit
+end
+
+module ActiveSupport
+  module Testing
+    module Performance
+      protected
+        def run_warmup
+          GC.start
+
+          time = Metrics::Time.new
+          run_test(time, :benchmark)
+          puts "%s (%s warmup)" % [full_test_name, time.format(time.total)]
+
+          GC.start
+        end
+        
+      class Performer; end
+
+      class Profiler < Performer
+        def initialize(*args)
+          super
+          @supported = @metric.measure_mode rescue false
+        end
+
+        def run
+          return unless @supported
+
+          RubyProf.measure_mode = @metric.measure_mode
+          RubyProf.start
+          RubyProf.pause
+          profile_options[:runs].to_i.times { run_test(@metric, :profile) }
+          @data = RubyProf.stop
+          @total = @data.threads.values.sum(0) { |method_infos| method_infos.max.total_time }
+        end
+
+        def report
+          if @supported
+            super
+          else
+            '%20s: unsupported' % @metric.name
+          end
+        end
+
+        def record
+          return unless @supported
+
+          klasses = profile_options[:formats].map { |f| RubyProf.const_get("#{f.to_s.camelize}Printer") }.compact
+
+          klasses.each do |klass|
+            fname = output_filename(klass)
+            FileUtils.mkdir_p(File.dirname(fname))
+            File.open(fname, 'wb') do |file|
+              klass.new(@data).print(file, profile_options.slice(:min_percent))
+            end
+          end
+        end
+
+        protected
+          def output_filename(printer_class)
+            suffix =
+              case printer_class.name.demodulize
+                when 'FlatPrinter';                 'flat.txt'
+                when 'FlatPrinterWithLineNumbers';  'flat_line_numbers.txt'
+                when 'GraphPrinter';                'graph.txt'
+                when 'GraphHtmlPrinter';            'graph.html'
+                when 'GraphYamlPrinter';            'graph.yml'
+                when 'CallTreePrinter';             'tree.txt'
+                when 'CallStackPrinter';            'stack.html'
+                when 'DotPrinter';                  'graph.dot'
+                else printer_class.name.sub(/Printer$/, '').underscore
+              end
+
+            "#{super()}_#{suffix}"
+          end
+      end
+
+      module Metrics
+        class Base
+          def profile
+            RubyProf.resume
+            yield
+          ensure
+            RubyProf.pause
+          end
+
+          protected
+            # Ruby 1.9 with GC::Profiler
+            if defined?(GC::Profiler)
+              def with_gc_stats
+                GC::Profiler.enable
+                GC.start
+                yield
+              ensure
+                GC::Profiler.disable
+              end
+
+            # Ruby 1.8 + ruby-prof wrapper (enable/disable stats for Benchmarker)
+            elsif GC.respond_to?(:enable_stats)
+              def with_gc_stats
+                GC.enable_stats
+                yield
+              ensure
+                GC.disable_stats
+              end
+
+            else
+              def with_gc_stats
+                yield
+              end
+            end
+        end
+        
+        class Time < Base; end
+        
+        class ProcessTime < Time
+          Mode = RubyProf::PROCESS_TIME if RubyProf.const_defined?(:PROCESS_TIME)
+
+          def measure
+            RubyProf.measure_process_time
+          end
+        end
+
+        class WallTime < Time
+          Mode = RubyProf::WALL_TIME if RubyProf.const_defined?(:WALL_TIME)
+
+          def measure
+            RubyProf.measure_wall_time
+          end
+        end
+
+        class CpuTime < Time
+          Mode = RubyProf::CPU_TIME if RubyProf.const_defined?(:CPU_TIME)
+
+          def initialize(*args)
+            # FIXME: yeah my CPU is 2.33 GHz
+            RubyProf.cpu_frequency = 2.33e9 unless RubyProf.cpu_frequency > 0
+            super
+          end
+
+          def measure
+            RubyProf.measure_cpu_time
+          end
+        end
+
+        class Memory < Base
+          Mode = RubyProf::MEMORY if RubyProf.const_defined?(:MEMORY)
+
+          # Ruby 1.9 + GCdata patch
+          if GC.respond_to?(:malloc_allocated_size)
+            def measure
+              GC.malloc_allocated_size / 1024.0
+            end
+
+          # Ruby 1.8 + ruby-prof wrapper
+          elsif RubyProf.respond_to?(:measure_memory)
+            def measure
+              RubyProf.measure_memory / 1024.0
+            end
+          end
+
+          def format(measurement)
+            '%.2f KB' % measurement
+          end
+        end
+
+        class Objects < Base
+          Mode = RubyProf::ALLOCATIONS if RubyProf.const_defined?(:ALLOCATIONS)
+
+          # Ruby 1.9 + GCdata patch
+          if GC.respond_to?(:malloc_allocations)
+            def measure
+              GC.malloc_allocations
+            end
+
+          # Ruby 1.8 + ruby-prof wrapper
+          elsif RubyProf.respond_to?(:measure_allocations)
+            def measure
+              RubyProf.measure_allocations
+            end
+          end
+
+          def format(measurement)
+            measurement.to_i.to_s
+          end
+        end
+
+        class GcRuns < Base
+          Mode = RubyProf::GC_RUNS if RubyProf.const_defined?(:GC_RUNS)
+
+          # Ruby 1.9
+          if GC.respond_to?(:count)
+            def measure
+              GC.count
+            end
+
+          # Ruby 1.8 + ruby-prof wrapper
+          elsif RubyProf.respond_to?(:measure_gc_runs)
+            def measure
+              RubyProf.measure_gc_runs
+            end
+          end
+
+          def format(measurement)
+            measurement.to_i.to_s
+          end
+        end
+
+        class GcTime < Base
+          Mode = RubyProf::GC_TIME if RubyProf.const_defined?(:GC_TIME)
+
+          # Ruby 1.9 with GC::Profiler
+          if defined?(GC::Profiler) && GC::Profiler.respond_to?(:total_time)
+            def measure
+              GC::Profiler.total_time
+            end
+
+          # Ruby 1.8 + ruby-prof wrapper
+          elsif RubyProf.respond_to?(:measure_gc_time)
+            def measure
+              RubyProf.measure_gc_time / 1000
+            end
+          end
+
+          def format(measurement)
+            '%.2f ms' % measurement
+          end
+        end
+      end
+    end
+  end
+end