ppapi/proxy/ppp_messaging_proxy_perftest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/command_line.h"
   6 #include "base/strings/string_number_conversions.h"
   7 #include "base/test/perf_time_logger.h"
   8 #include "ppapi/c/ppp_messaging.h"
   9 #include "ppapi/proxy/ppapi_messages.h"
  10 #include "ppapi/proxy/ppapi_proxy_test.h"
  11 #include "ppapi/proxy/serialized_var.h"
  12 #include "ppapi/shared_impl/ppapi_globals.h"
  13 #include "ppapi/shared_impl/proxy_lock.h"
  14 #include "ppapi/shared_impl/var.h"
  15 #include "ppapi/shared_impl/var_tracker.h"
  16
  17 namespace ppapi {
  18 namespace proxy {
  19 namespace {
  20
  21 base::WaitableEvent handle_message_called(false, false);
  22
  23 void HandleMessage(PP_Instance /* instance */, PP_Var message_data) {
  24   ppapi::ProxyAutoLock lock;
  25   StringVar* string_var = StringVar::FromPPVar(message_data);
  26   DCHECK(string_var);
  27   // Retrieve the string to make sure the proxy can't "optimize away" sending
  28   // the actual contents of the string (e.g., by doing a lazy retrieve or
  29   // something). Note that this test is for performance only, and assumes
  30   // other tests check for correctness.
  31   std::string s = string_var->value();
  32   // Do something simple with the string so the compiler won't complain.
  33   if (s.length() > 0)
  34     s[0] = 'a';
  35   PpapiGlobals::Get()->GetVarTracker()->ReleaseVar(message_data);
  36   handle_message_called.Signal();
  37 }
  38
  39 PPP_Messaging ppp_messaging_mock = {
  40   &HandleMessage
  41 };
  42
  43 class PppMessagingPerfTest : public TwoWayTest {
  44  public:
  45   PppMessagingPerfTest() : TwoWayTest(TwoWayTest::TEST_PPP_INTERFACE) {
  46     plugin().RegisterTestInterface(PPP_MESSAGING_INTERFACE,
  47                                    &ppp_messaging_mock);
  48   }
  49 };
  50
  51 }  // namespace
  52
  53 // Tests the performance of sending strings through the proxy.
  54 TEST_F(PppMessagingPerfTest, StringPerformance) {
  55   const PP_Instance kTestInstance = pp_instance();
  56   int seed = 123;
  57   int string_count = 1000;
  58   int max_string_size = 1000000;
  59   CommandLine* command_line = CommandLine::ForCurrentProcess();
  60   if (command_line) {
  61     if (command_line->HasSwitch("seed")) {
  62       base::StringToInt(command_line->GetSwitchValueASCII("seed"),
  63                         &seed);
  64     }
  65     if (command_line->HasSwitch("string_count")) {
  66       base::StringToInt(command_line->GetSwitchValueASCII("string_count"),
  67                         &string_count);
  68     }
  69     if (command_line->HasSwitch("max_string_size")) {
  70       base::StringToInt(command_line->GetSwitchValueASCII("max_string_size"),
  71                         &max_string_size);
  72     }
  73   }
  74   srand(seed);
  75   base::PerfTimeLogger logger("PppMessagingPerfTest.StringPerformance");
  76   for (int i = 0; i < string_count; ++i) {
  77     const std::string test_string(rand() % max_string_size, 'a');
  78     PP_Var host_string = StringVar::StringToPPVar(test_string);
  79     // We don't have a host-side PPP_Messaging interface; just send the message
  80     // directly like the proxy does.
  81     host().host_dispatcher()->Send(new PpapiMsg_PPPMessaging_HandleMessage(
  82         ppapi::API_ID_PPP_MESSAGING,
  83         kTestInstance,
  84         ppapi::proxy::SerializedVarSendInput(host().host_dispatcher(),
  85                                              host_string)));
  86     handle_message_called.Wait();
  87     PpapiGlobals::Get()->GetVarTracker()->ReleaseVar(host_string);
  88   }
  89 }
  90
  91 }  // namespace proxy
  92 }  // namespace ppapi
  93