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      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 
     94