Luajit API and some examples

Change-Id: Ia140c4750f06870c40b7058c4afb2e20ca633a49
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>

1 files changed, 73 insertions, 0 deletions

diff --git a/vpp-api/lua/bench.lua b/vpp-api/lua/bench.lua
new file mode 100644
index 00000000000..edff32b90d6
--- /dev/null
+++ b/vpp-api/lua/bench.lua
@@ -0,0 +1,73 @@
+--[[
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+]]
+
+local vpp = require "vpp-lapi"
+
+local ffi = require "ffi"
+
+ffi.cdef([[
+   struct timespec {
+               long tv_sec;        /* seconds */
+               long tv_nsec;       /* nanoseconds */
+           };
+
+   int clock_gettime(int clk_id, struct timespec *tp);
+]])
+
+
+local time_cache = ffi.new("struct timespec[1]")
+local time_cache_1 = time_cache[0]
+function get_ns()
+  ffi.C.clock_gettime(0, time_cache)
+  return time_cache_1.tv_nsec + 1000000000 * time_cache_1.tv_sec
+end
+
+function do_bench()
+  local cycle_start = get_ns()
+  local n_iterations =  10000
+  local count = 1
+  for i = 1,n_iterations do
+    -- print(i)
+    vpp:api_call("show_version")
+    count = count + 1
+    -- print(i, "done")
+  end
+  cycle_end = get_ns()
+  local tps = n_iterations*1000000000LL/(cycle_end - cycle_start)
+  print (tostring(count) .. " iterations, average speed " .. tostring(tps) .. " per second")
+  return tps
+end
+
+root_dir = "/home/ubuntu/vpp"
+pneum_path = root_dir .. "/build-root/install-vpp_debug-native/vpp-api/lib64/libpneum.so"
+
+vpp:init({ pneum_path = pneum_path })
+
+vpp:consume_api(root_dir .. "/build-root/install-vpp_debug-native/vlib-api/vlibmemory/memclnt.api")
+vpp:consume_api(root_dir .. "/build-root/install-vpp_debug-native/vpp/vpp-api/vpe.api")
+
+vpp:connect("lua-bench")
+local n_tests = 10
+local tps_acc = 0LL
+for i=1,n_tests do
+  tps_acc = tps_acc + do_bench()
+end
+print("Average tps across the tests: " .. tostring(tps_acc/n_tests))
+
+vpp:disconnect()
+
+