Share warmup logic across MJIT benchmarks

benchmark/lib/benchmark_driver/runner/mjit.rb

@@ -0,0 +1,34 @@
+require 'benchmark_driver/struct'
+require 'benchmark_driver/metric'
+require 'erb'
+
+# A runner to measure after-JIT performance easily
+class BenchmarkDriver::Runner::Mjit < BenchmarkDriver::Runner::Ips
+  # JobParser returns this, `BenchmarkDriver::Runner.runner_for` searches "*::Job"
+  Job = Class.new(BenchmarkDriver::DefaultJob)
+
+  # Dynamically fetched and used by `BenchmarkDriver::JobParser.parse`
+  JobParser = BenchmarkDriver::DefaultJobParser.for(klass: Job, metrics: [METRIC]).extend(Module.new{
+    def parse(**)
+      jobs = super
+      jobs.map do |job|
+        job = job.dup
+        job.prelude = "#{job.prelude}\n#{<<~EOS}"
+          if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
+            __bmdv_ruby_i = 0
+            while __bmdv_ruby_i < 10000 # jit_min_calls
+              #{job.script}
+              __bmdv_ruby_i += 1
+            end
+            RubyVM::MJIT.pause # compile
+            #{job.script}
+            RubyVM::MJIT.resume; RubyVM::MJIT.pause # recompile
+            #{job.script}
+            RubyVM::MJIT.resume; RubyVM::MJIT.pause # recompile 2
+          end
+        EOS
+        job
+      end
+    end
+  })
+end

benchmark/mjit_exivar.yml

@@ -1,3 +1,4 @@
+type: lib/benchmark_driver/runner/mjit
 prelude: |
   class Bench < Hash
     def initialize
@@ -11,20 +12,6 @@ prelude: |
 
   bench = Bench.new
 
-  if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
-    jit_min_calls = 10000
-    i = 0
-    while i < jit_min_calls
-      bench.exivar
-      i += 1
-    end
-    RubyVM::MJIT.pause # compile (1)
-    # issue recompile
-    bench.exivar
-    RubyVM::MJIT.resume
-    RubyVM::MJIT.pause # compile (2)
-  end
-
 benchmark:
   mjit_exivar: bench.exivar
 

benchmark/mjit_int_zero_p.yml

@@ -1,3 +1,4 @@
+type: lib/benchmark_driver/runner/mjit
 prelude: |
   def mjit_zero?(int)
     int.zero?
@@ -7,30 +8,14 @@ prelude: |
     int == 0
   end
 
-  def warmup(sym, int)
-    if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
-      jit_min_calls = 10000
-      i = 0
-      while i < jit_min_calls
-        send(sym, int)
-        i += 1
-      end
-      RubyVM::MJIT.pause
-    end
-  end
-
 benchmark:
   - name: 0.zero?
-    prelude: warmup(:mjit_zero?, 0)
     script: mjit_zero?(0)
   - name: 1.zero?
-    prelude: warmup(:mjit_zero?, 1)
     script: mjit_zero?(1)
   - name: 0 == 0
-    prelude: warmup(:mjit_eq_0, 0)
     script: mjit_eq_0(0)
   - name: 1 == 0
-    prelude: warmup(:mjit_eq_0, 1)
     script: mjit_eq_0(1)
 
 loop_count: 40000000

benchmark/mjit_leave.yml

@@ -1,3 +1,4 @@
+type: lib/benchmark_driver/runner/mjit
 prelude: |
   def leave
     nil

benchmark/mjit_send_cfunc.yml

@@ -1,3 +1,4 @@
+type: lib/benchmark_driver/runner/mjit
 prelude: |
   def mjit_send_cfunc
     self.class