* benchmark/bm_vm1_gc_wb_ary(_promoted).rb: separate fastpath and

slowpath for WB.
  Before this change bm_vm1_gc_wb_ary.rb tried to check the performance
  for WB slowpath (making a reference from oldobj to newobj). However,
  from Ruby 2.2, 3 GCs are needed to promote new objects because
  only 3 age objects are promted objects.
  To compare fastpath and slowpath, introduce new "promoted" version
  benchmark.
  bm_vm1_gc_wb_ary.rb is for fastpath and
  bm_vm1_gc_wb_ary_promoted.rb is for slowpath.
* benchmark/bm_vm1_gc_wb_obj(_promtoed).rb: ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49985 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,21 @@
+Tue Mar 17 18:51:43 2015  Koichi Sasada  <ko1@atdot.net>
+
+	* benchmark/bm_vm1_gc_wb_ary(_promoted).rb: separate fastpath and
+	  slowpath for WB.
+
+	  Before this change bm_vm1_gc_wb_ary.rb tried to check the performance
+	  for WB slowpath (making a reference from oldobj to newobj). However,
+	  from Ruby 2.2, 3 GCs are needed to promote new objects because
+	  only 3 age objects are promted objects.
+
+	  To compare fastpath and slowpath, introduce new "promoted" version
+	  benchmark.
+
+	  bm_vm1_gc_wb_ary.rb is for fastpath and
+	  bm_vm1_gc_wb_ary_promoted.rb is for slowpath.
+
+	* benchmark/bm_vm1_gc_wb_obj(_promtoed).rb: ditto.
+
 Tue Mar 17 17:23:11 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* dir.c (glob_helper): distinguish not-yet-stated and DT_UNKNOWN

benchmark/bm_vm1_gc_wb_ary.rb

@@ -1,10 +1,8 @@
-long_lived = []
-GC.start
-GC.start
+short_lived_ary = []
 
 i = 0
 short_lived = ''
 while i<30_000_000 # while loop 1
-  long_lived[0] = short_lived # write barrier
+  short_lived_ary[0] = short_lived # write barrier
   i+=1
 end

benchmark/bm_vm1_gc_wb_ary_promoted.rb

@@ -0,0 +1,14 @@
+long_lived = []
+
+if RUBY_VERSION > "2.2.0"
+  3.times{ GC.start(immediate_mark: false, lazy_sweep: false) }
+elsif
+  GC.start
+end
+
+i = 0
+short_lived = ''
+while i<30_000_000 # while loop 1
+  long_lived[0] = short_lived # write barrier
+  i+=1
+end

benchmark/bm_vm1_gc_wb_obj.rb

@@ -1,13 +1,11 @@
 class C
   attr_accessor :foo
 end
-long_lived = C.new
-GC.start
-GC.start
+short_lived_obj = C.new
 
 i = 0
 short_lived = ''
 while i<30_000_000 # while loop 1
-  long_lived.foo = short_lived # write barrier
+  short_lived_obj.foo = short_lived # write barrier
   i+=1
 end

benchmark/bm_vm1_gc_wb_obj_promoted.rb

@@ -0,0 +1,17 @@
+class C
+  attr_accessor :foo
+end
+long_lived = C.new
+
+if RUBY_VERSION > "2.2.0"
+  3.times{ GC.start(immediate_mark: false, lazy_sweep: false) }
+elsif
+  GC.start
+end
+
+i = 0
+short_lived = ''
+while i<30_000_000 # while loop 1
+  long_lived.foo = short_lived # write barrier
+  i+=1
+end