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diff --git a/src/ceph/src/test/msgr/test_userspace_event.cc b/src/ceph/src/test/msgr/test_userspace_event.cc
new file mode 100644
index 0000000..067d815
--- /dev/null
+++ b/src/ceph/src/test/msgr/test_userspace_event.cc
@@ -0,0 +1,174 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2016 XSky <haomai@xsky.com>
+ *
+ * Author: Haomai Wang <haomaiwang@gmail.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#include <map>
+#include <random>
+#include <gtest/gtest.h>
+
+#include "msg/async/dpdk/UserspaceEvent.h"
+#include "global/global_context.h"
+
+class UserspaceManagerTest : public ::testing::Test {
+ public:
+  UserspaceEventManager *manager;
+
+  UserspaceManagerTest() {}
+  virtual void SetUp() {
+    manager = new UserspaceEventManager(g_ceph_context);
+  }
+  virtual void TearDown() {
+    delete manager;
+  }
+};
+
+TEST_F(UserspaceManagerTest, BasicTest) {
+  int events[10];
+  int masks[10];
+  int fd = manager->get_eventfd();
+  ASSERT_EQ(fd, 1);
+  ASSERT_EQ(0, manager->listen(fd, 1));
+  ASSERT_EQ(0, manager->notify(fd, 1));
+  ASSERT_EQ(1, manager->poll(events, masks, 10, nullptr));
+  ASSERT_EQ(fd, events[0]);
+  ASSERT_EQ(1, masks[0]);
+  ASSERT_EQ(0, manager->notify(fd, 2));
+  ASSERT_EQ(0, manager->poll(events, masks, 10, nullptr));
+  ASSERT_EQ(0, manager->unlisten(fd, 1));
+  ASSERT_EQ(0, manager->notify(fd, 1));
+  ASSERT_EQ(0, manager->poll(events, masks, 10, nullptr));
+  manager->close(fd);
+  fd = manager->get_eventfd();
+  ASSERT_EQ(fd, 1);
+  ASSERT_EQ(0, manager->poll(events, masks, 10, nullptr));
+}
+
+TEST_F(UserspaceManagerTest, FailTest) {
+  int events[10];
+  int masks[10];
+  int fd = manager->get_eventfd();
+  ASSERT_EQ(fd, 1);
+  ASSERT_EQ(-ENOENT, manager->listen(fd+1, 1));
+  ASSERT_EQ(-ENOENT, manager->notify(fd+1, 1));
+  ASSERT_EQ(0, manager->poll(events, masks, 10, nullptr));
+  ASSERT_EQ(-ENOENT, manager->unlisten(fd+1, 1));
+  manager->close(fd);
+}
+
+TEST_F(UserspaceManagerTest, StressTest) {
+  std::vector<std::pair<int, int> > mappings;
+  int events[10];
+  int masks[10];
+  std::random_device rd;
+  std::default_random_engine rng(rd());
+  std::uniform_int_distribution<> dist(0, 100);
+
+  mappings.resize(1001);
+  mappings[0] = std::make_pair(-1, -1);
+  for (int i = 0; i < 1000; ++i) {
+    int fd = manager->get_eventfd();
+    ASSERT_TRUE(fd > 0);
+    mappings[fd] = std::make_pair(0, 0);
+  }
+  int r = 0;
+  int fd = manager->get_eventfd();
+  auto get_activate_count = [](std::vector<std::pair<int, int> > &m) {
+    std::vector<int> fds;
+    int mask = 0;
+    size_t idx = 0;
+    for (auto &&p : m) {
+      mask = p.first & p.second;
+      if (p.first != -1 && mask) {
+        p.second &= (~mask);
+        fds.push_back(idx);
+        std::cerr << " activate " << idx << " mask " << mask << std::endl;
+      }
+      ++idx;
+    }
+    return fds;
+  };
+  for (int i = 0; i < 10000; ++i) {
+    int value = dist(rng);
+    fd = dist(rng) % mappings.size();
+    auto &p = mappings[fd];
+    int mask = dist(rng) % 2 + 1;
+    if (value > 55) {
+      r = manager->notify(fd, mask);
+      if (p.first == -1) {
+        ASSERT_EQ(p.second, -1);
+        ASSERT_EQ(r, -ENOENT);
+      } else {
+        p.second |= mask;
+        ASSERT_EQ(r, 0);
+      }
+      std::cerr << " notify fd " << fd << " mask " << mask << " r " << r << std::endl;
+    } else if (value > 45) {
+      r = manager->listen(fd, mask);
+      std::cerr << " listen fd " << fd << " mask " << mask << " r " << r << std::endl;
+      if (p.first == -1) {
+        ASSERT_EQ(p.second, -1);
+        ASSERT_EQ(r, -ENOENT);
+      } else {
+        p.first |= mask;
+        ASSERT_EQ(r, 0);
+      }
+    } else if (value > 35) {
+      r = manager->unlisten(fd, mask);
+      std::cerr << " unlisten fd " << fd << " mask " << mask << " r " << r << std::endl;
+      if (p.first == -1) {
+        ASSERT_EQ(p.second, -1);
+        ASSERT_EQ(r, -ENOENT);
+      } else {
+        p.first &= ~mask;
+        ASSERT_EQ(r, 0);
+      }
+    } else if (value > 20) {
+      std::set<int> actual, expected;
+      do {
+        r = manager->poll(events, masks, 3, nullptr);
+        std::cerr << " poll " << r;
+        for (int k = 0; k < r; ++k) {
+          std::cerr << events[k] << " ";
+          actual.insert(events[k]);
+        }
+      } while (r == 3);
+      std::cerr << std::endl;
+      auto fds = get_activate_count(mappings);
+      for (auto &&d : fds)
+        expected.insert(d);
+      ASSERT_EQ(expected, actual);
+    } else if (value > 10) {
+      r = manager->get_eventfd();
+      std::cerr << " open fd " << r << std::endl;
+      ASSERT_TRUE(r > 0);
+      if ((size_t)r >= mappings.size())
+        mappings.resize(r+1);
+      mappings[r] = std::make_pair(0, 0);
+    } else {
+      manager->close(fd);
+      std::cerr << " close fd " << fd << std::endl;
+      mappings[fd] = std::make_pair(-1, -1);
+    }
+    ASSERT_TRUE(manager->check());
+  }
+}
+
+/*
+ * Local Variables:
+ * compile-command: "cd ../.. ; make ceph_test_userspace_event &&
+ *    ./ceph_test_userspace_event.cc
+ *
+ * End:
+ */