1 files changed, 24 insertions, 0 deletions
diff --git a/benchmark/vm_thread_mutex3.yml b/benchmark/vm_thread_mutex3.yml
new file mode 100644
index 0000000000..99f3b81f99
--- /dev/null
+++ b/benchmark/vm_thread_mutex3.yml
@@ -0,0 +1,24 @@
+prelude: |
+  # 1000 threads, one mutex
+benchmark:
+  vm_thread_mutex3: |
+
+    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
+loop_count: 1