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

   1 /* Copyright (c) 2017-2021. 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, 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);
  37   }
  38
  39 public:
  40   explicit Replayer(std::vector<std::string> args)
  41   {
  42     const char* actor_name = args[0].c_str();
  43     if (args.size() > 1) { // split mode, the trace file was provided in the deployment file
  44       const char* trace_filename = args[1].c_str();
  45       simgrid::xbt::replay_runner(actor_name, trace_filename);
  46     } else { // Merged mode
  47       simgrid::xbt::replay_runner(actor_name);
  48     }
  49   }
  50
  51   void operator()() const
  52   {
  53     // Nothing to do here
  54   }
  55
  56   /* My actions */
  57   static void open(simgrid::xbt::ReplayAction& action)
  58   {
  59     std::string file_name = action[2];
  60     double clock          = simgrid::s4u::Engine::get_clock();
  61     std::string full_name = simgrid::s4u::this_actor::get_name() + ":" + file_name;
  62
  63     ACT_DEBUG("Entering Open: %s (filename: %s)", NAME.c_str(), file_name.c_str());
  64     opened_files.emplace(std::piecewise_construct, std::forward_as_tuple(full_name),
  65                          std::forward_as_tuple(file_name, nullptr));
  66
  67     log_action(action, simgrid::s4u::Engine::get_clock() - clock);
  68   }
  69
  70   static void read(simgrid::xbt::ReplayAction& action)
  71   {
  72     std::string file_name = action[2];
  73     sg_size_t size        = std::stoul(action[3]);
  74     double clock          = simgrid::s4u::Engine::get_clock();
  75
  76     simgrid::s4u::File* file = get_file_descriptor(file_name);
  77
  78     ACT_DEBUG("Entering Read: %s (size: %llu)", NAME.c_str(), size);
  79     file->read(size);
  80
  81     log_action(action, simgrid::s4u::Engine::get_clock() - clock);
  82   }
  83
  84   static void close(simgrid::xbt::ReplayAction& action)
  85   {
  86     std::string file_name = action[2];
  87     std::string full_name = simgrid::s4u::this_actor::get_name() + ":" + file_name;
  88     double clock          = simgrid::s4u::Engine::get_clock();
  89
  90     ACT_DEBUG("Entering Close: %s (filename: %s)", NAME.c_str(), file_name.c_str());
  91     xbt_assert(opened_files.erase(full_name) == 1, "File not found in opened files: %s", full_name.c_str());
  92
  93     log_action(action, simgrid::s4u::Engine::get_clock() - clock);
  94   }
  95 };
  96
  97 std::unordered_map<std::string, simgrid::s4u::File> Replayer::opened_files;
  98
  99 int main(int argc, char* argv[])
 100 {
 101   simgrid::s4u::Engine e(&argc, argv);
 102   sg_storage_file_system_init();
 103
 104   xbt_assert(argc > 3,
 105              "Usage: %s platform_file deployment_file [action_files]\n"
 106              "\texample: %s platform.xml deployment.xml actions # if all actions are in the same file\n"
 107              "\t# if actions are in separate files, specified in deployment\n"
 108              "\texample: %s platform.xml deployment.xml",
 109              argv[0], argv[0], argv[0]);
 110
 111   e.load_platform(argv[1]);
 112   e.register_actor<Replayer>("p0");
 113   e.load_deployment(argv[2]);
 114
 115   if (argv[3] != nullptr)
 116     xbt_replay_set_tracefile(argv[3]);
 117
 118   /*   Action registration */
 119   xbt_replay_action_register("open", Replayer::open);
 120   xbt_replay_action_register("read", Replayer::read);
 121   xbt_replay_action_register("close", Replayer::close);
 122
 123   e.run();
 124
 125   XBT_INFO("Simulation time %g", simgrid::s4u::Engine::get_clock());
 126
 127   return 0;
 128 }