Add memtier benchmark to testing

Closes #81

Author: ligurio

.github/workflows/testing.yaml

@@ -42,3 +42,5 @@ jobs:
         run: pip install -r test-run/requirements.txt
 
       - run: make test-memcached
+
+      - run: tarantool test/bench/memcached.lua

test/bench/memcached.lua

@@ -1,15 +1,57 @@
 #!/usr/bin/env tarantool
 
+local fio = require('fio')
+local popen = require('popen')
+package.cpath = './?.so;' .. package.cpath
+local memcached = require('memcached')
+
+local port = 11211
+
+local function run_memtier(instance, memtier_path, proto)
+    print(string.format("Run memtier benchmark with protocol '%s'", proto))
+
+    -- TODO: configure memcached protocol
+    -- https://github.com/tarantool/memcached/issues/77
+    local memtier_proto = 'memcache_' .. proto
+    local memtier_argv = {
+        memtier_path,
+        '--server=127.0.0.1',
+        string.format('--port=%d', port),
+        string.format('--protocol=%s', memtier_proto),
+        '--threads=20',
+        '--test-time=30',
+        '--hide-histogram'
+    }
+    local ph, err = popen.new(memtier_argv, {
+        stdout = popen.opts.INHERIT,
+        stderr = popen.opts.INHERIT,
+    })
+    local res = ph:wait()
+    ph:close()
+
+    local rc = res.exit_code
+    if rc ~= 0 then
+        os.exit(rc)
+    end
+end
+
 box.cfg{
     wal_mode         = 'none',
     memtx_memory     = 100 * 1024 * 1024,
-    log_nonblock  = false,
+    log_nonblock     = false,
 }
 
-package.cpath = './?.so;' .. package.cpath
-
-require('memcached').create('memcached', '0.0.0.0:11211', {
-    expire_full_scan_time = 120
+local mc = memcached.create('memcached',
+    string.format('0.0.0.0:%d', port), {
+    expire_full_scan_time = 120,
 })
 
--- box.schema.user.grant('guest', 'read,write,execute', 'universe')
+local root = fio.cwd()
+local memtier_path = fio.pathjoin(root, 'test/bench/memtier_benchmark')
+
+run_memtier(mc, memtier_path, 'text')
+run_memtier(mc, memtier_path, 'binary')
+
+mc:stop()
+
+os.exit(0)