newgrf_profiling.cpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "newgrf_profiling.h"
#include "fileio_func.h"
#include "string_func.h"
#include "console_func.h"
#include "spritecache.h"
#include "3rdparty/fmt/chrono.h"
#include "timer/timer.h"
#include "timer/timer_game_tick.h"
 
#include <chrono>
 
 
std::vector<NewGRFProfiler> _newgrf_profilers;
 
 
NewGRFProfiler::NewGRFProfiler(const GRFFile *grffile) : grffile{ grffile }, active{ false }, cur_call{}
{
}
 
NewGRFProfiler::~NewGRFProfiler()
{
}
 
void NewGRFProfiler::BeginResolve(const ResolverObject &resolver)
{
  using namespace std::chrono;
  this->cur_call.root_sprite = resolver.root_spritegroup->nfo_line;
  this->cur_call.subs = 0;
  this->cur_call.time = (uint32_t)time_point_cast<microseconds>(high_resolution_clock::now()).time_since_epoch().count();
  this->cur_call.tick = TimerGameTick::counter;
  this->cur_call.cb = resolver.callback;
  this->cur_call.feat = resolver.GetFeature();
  this->cur_call.item = resolver.GetDebugID();
}
 
void NewGRFProfiler::EndResolve(const SpriteGroup *result)
{
  using namespace std::chrono;
  this->cur_call.time = (uint32_t)time_point_cast<microseconds>(high_resolution_clock::now()).time_since_epoch().count() - this->cur_call.time;
 
  if (result == nullptr) {
    this->cur_call.result = 0;
  } else if (result->type == SGT_CALLBACK) {
    this->cur_call.result = static_cast<const CallbackResultSpriteGroup *>(result)->result;
  } else if (result->type == SGT_RESULT) {
    this->cur_call.result = GetSpriteLocalID(static_cast<const ResultSpriteGroup *>(result)->sprite);
  } else {
    this->cur_call.result = result->nfo_line;
  }
 
  this->calls.push_back(this->cur_call);
}
 
void NewGRFProfiler::RecursiveResolve()
{
  this->cur_call.subs += 1;
}
 
void NewGRFProfiler::Start()
{
  this->Abort();
  this->active = true;
  this->start_tick = TimerGameTick::counter;
}
 
uint32_t NewGRFProfiler::Finish()
{
  if (!this->active) return 0;
 
  if (this->calls.empty()) {
    IConsolePrint(CC_DEBUG, "Finished profile of NewGRF [{:08X}], no events collected, not writing a file.", BSWAP32(this->grffile->grfid));
 
    this->Abort();
    return 0;
  }
 
  std::string filename = this->GetOutputFilename();
  IConsolePrint(CC_DEBUG, "Finished profile of NewGRF [{:08X}], writing {} events to '{}'.", BSWAP32(this->grffile->grfid), this->calls.size(), filename);
 
  FILE *f = FioFOpenFile(filename, "wt", Subdirectory::NO_DIRECTORY);
  FileCloser fcloser(f);
 
  uint32_t total_microseconds = 0;
 
  fmt::print(f, "Tick,Sprite,Feature,Item,CallbackID,Microseconds,Depth,Result\n");
  for (const Call &c : this->calls) {
    fmt::print(f, "{},{},{:#X},{},{:#X},{},{},{}\n", c.tick, c.root_sprite, c.feat, c.item, (uint)c.cb, c.time, c.subs, c.result);
    total_microseconds += c.time;
  }
 
  this->Abort();
  return total_microseconds;
}
 
void NewGRFProfiler::Abort()
{
  this->active = false;
  this->calls.clear();
}
 
std::string NewGRFProfiler::GetOutputFilename() const
{
  return fmt::format("{}grfprofile-{:%Y%m%d-%H%M}-{:08X}.csv", FiosGetScreenshotDir(), fmt::localtime(time(nullptr)), BSWAP32(this->grffile->grfid));
}
 
/* static */ uint32_t NewGRFProfiler::FinishAll()
{
  NewGRFProfiler::AbortTimer();
 
  uint64_t max_ticks = 0;
  uint32_t total_microseconds = 0;
  for (NewGRFProfiler &pr : _newgrf_profilers) {
    if (pr.active) {
      total_microseconds += pr.Finish();
      max_ticks = std::max(max_ticks, TimerGameTick::counter - pr.start_tick);
    }
  }
 
  if (total_microseconds > 0 && max_ticks > 0) {
    IConsolePrint(CC_DEBUG, "Total NewGRF callback processing: {} microseconds over {} ticks.", total_microseconds, max_ticks);
  }
 
  return total_microseconds;
}
 
static TimeoutTimer<TimerGameTick> _profiling_finish_timeout(0, []()
{
  NewGRFProfiler::FinishAll();
});
 
/* static */ void NewGRFProfiler::StartTimer(uint64_t ticks)
{
  _profiling_finish_timeout.Reset(ticks);
}
 
/* static */ void NewGRFProfiler::AbortTimer()
{
  _profiling_finish_timeout.Abort();
}