examples/s4u/replay-io/s4u-replay-io.cpp

   1 /* Copyright (c) 2017-2020. The SimGrid Team. All rights reserved.          */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4  * under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include <simgrid/plugins/file_system.h>
   7 #include <simgrid/s4u.hpp>
   8 #include <xbt/replay.hpp>
   9 #include <xbt/str.h>
  10
  11 #include <boost/algorithm/string/join.hpp>
  12
  13 XBT_LOG_NEW_DEFAULT_CATEGORY(replay_io, "Messages specific for this example");
  14
  15 #define ACT_DEBUG(...)                                                                                                 \
  16   if (XBT_LOG_ISENABLED(replay_io, xbt_log_priority_verbose)) {                                                        \
  17     std::string NAME = boost::algorithm::join(action, " ");                                                            \
  18     XBT_DEBUG(__VA_ARGS__);                                                                                            \
  19   } else                                                                                                               \
  20     ((void)0)
  21
  22 class Replayer {
  23   static std::unordered_map<std::string, std::unique_ptr<simgrid::s4u::File>> opened_files;
  24
  25   static void log_action(const simgrid::xbt::ReplayAction& action, double date)
  26   {
  27     if (XBT_LOG_ISENABLED(replay_io, xbt_log_priority_verbose)) {
  28       std::string s = boost::algorithm::join(action, " ");
  29       XBT_VERB("%s %f", s.c_str(), date);
  30     }
  31   }
  32
  33   static simgrid::s4u::File* get_file_descriptor(const std::string& file_name)
  34   {
  35     std::string full_name = simgrid::s4u::this_actor::get_name() + ":" + file_name;
  36     return opened_files.at(full_name).get();
  37   }
  38
  39 public:
  40   explicit Replayer(std::vector<std::string> args)
  41   {
  42     const char* actor_name = args[0].c_str();
  43     simgrid::xbt::replay_runner(actor_name, nullptr);
  44   }
  45
  46   void operator()() const
  47   {
  48     // Nothing to do here
  49   }
  50
  51   /* My actions */
  52   static void open(simgrid::xbt::ReplayAction& action)
  53   {
  54     std::string file_name = action[2];
  55     double clock          = simgrid::s4u::Engine::get_clock();
  56     std::string full_name = simgrid::s4u::this_actor::get_name() + ":" + file_name;
  57
  58     ACT_DEBUG("Entering Open: %s (filename: %s)", NAME.c_str(), file_name.c_str());
  59     auto file = std::make_unique<simgrid::s4u::File>(file_name, nullptr);
  60
  61     opened_files.insert({full_name, std::move(file)});
  62
  63     log_action(action, simgrid::s4u::Engine::get_clock() - clock);
  64   }
  65
  66   static void read(simgrid::xbt::ReplayAction& action)
  67   {
  68     std::string file_name = action[2];
  69     sg_size_t size        = std::stoul(action[3]);
  70     double clock          = simgrid::s4u::Engine::get_clock();
  71
  72     simgrid::s4u::File* file = get_file_descriptor(file_name);
  73
  74     ACT_DEBUG("Entering Read: %s (size: %llu)", NAME.c_str(), size);
  75     file->read(size);
  76
  77     log_action(action, simgrid::s4u::Engine::get_clock() - clock);
  78   }
  79
  80   static void close(simgrid::xbt::ReplayAction& action)
  81   {
  82     std::string file_name = action[2];
  83     std::string full_name = simgrid::s4u::this_actor::get_name() + ":" + file_name;
  84     double clock          = simgrid::s4u::Engine::get_clock();
  85
  86     ACT_DEBUG("Entering Close: %s (filename: %s)", NAME.c_str(), file_name.c_str());
  87     XBT_ATTRIB_UNUSED auto count = opened_files.erase(full_name);
  88     xbt_assert(count == 1, "File not found in opened files: %s", full_name.c_str());
  89
  90     log_action(action, simgrid::s4u::Engine::get_clock() - clock);
  91   }
  92 };
  93
  94 std::unordered_map<std::string, std::unique_ptr<simgrid::s4u::File>> Replayer::opened_files;
  95
  96 int main(int argc, char* argv[])
  97 {
  98   simgrid::s4u::Engine e(&argc, argv);
  99   sg_storage_file_system_init();
 100
 101   xbt_assert(argc > 3,
 102              "Usage: %s platform_file deployment_file [action_files]\n"
 103              "\texample: %s platform.xml deployment.xml actions # if all actions are in the same file\n"
 104              "\t# if actions are in separate files, specified in deployment\n"
 105              "\texample: %s platform.xml deployment.xml",
 106              argv[0], argv[0], argv[0]);
 107
 108   e.load_platform(argv[1]);
 109   e.register_actor<Replayer>("p0");
 110   e.load_deployment(argv[2]);
 111
 112   /*   Action registration */
 113   xbt_replay_action_register("open", Replayer::open);
 114   xbt_replay_action_register("read", Replayer::read);
 115   xbt_replay_action_register("close", Replayer::close);
 116
 117   std::ifstream ifs;
 118   if (argv[3]) {
 119     ifs.open(argv[3], std::ifstream::in);
 120     simgrid::xbt::action_fs = &ifs;
 121   }
 122
 123   e.run();
 124
 125   simgrid::xbt::action_fs = nullptr;
 126
 127   XBT_INFO("Simulation time %g", e.get_clock());
 128
 129   return 0;
 130 }