* benchmark/bm_io_select3.rb: New.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31392 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Sat Apr 30 16:48:36 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* benchmark/bm_io_select3.rb: New.
+
 Sat Apr 30 16:27:09 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* io.c (copy_stream_body, rb_io_s_copy_stream): move rb_fd_init()

benchmark/bm_io_select2.rb

@@ -1,4 +1,4 @@
-# IO.select performance. worst case
+# IO.select performance. worst case of single fd.
 
 ios = []
 nr = 1000000

benchmark/bm_io_select3.rb

@@ -0,0 +1,17 @@
+# IO.select performance. a lot of fd
+
+ios = []
+nr = 100
+max = Process.getrlimit(Process::RLIMIT_NOFILE)[0]
+puts "max fd: #{max} (results not apparent with <= 1024 max fd)"
+
+(max - 10).times do
+  r, w = IO.pipe
+  r.close
+  ios.push w
+end
+
+nr.times do
+  IO.select nil, ios
+end
+