Revert "benchmark/*.yml: convert from benchmark/bm_*.rb"

This reverts r63900.

Having single-execution benchmark as a normal Ruby script is preferred
by ko1. I'm not a big fan of having inconsistent benchmark formats, but
I can understand some benefits of it.

common.mk: remove obsolsted benchmark-each PHONY declaration, support
running Ruby scripts added by this commit.

README.md: follow ARGS change

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63926 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 20 insertions, 0 deletions

diff --git a/benchmark/bm_vm_thread_mutex3.rb b/benchmark/bm_vm_thread_mutex3.rb
new file mode 100644
index 0000000000..c750dc542a
--- /dev/null
+++ b/benchmark/bm_vm_thread_mutex3.rb
@@ -0,0 +1,20 @@
+# 1000 threads, one mutex
+
+require 'thread'
+m = Thread::Mutex.new
+r = 0
+max = 2000
+(1..max).map{
+  Thread.new{
+    i = 0
+    while i<max
+      i += 1
+      m.synchronize{
+        r += 1
+      }
+    end
+  }
+}.each{|e|
+  e.join
+}
+raise r.to_s if r != max * max