Logging

Logging

Overview

Using the Logger

** Using the Logger

Put these includes at the beginning of every file that needs logging (and in main where it is set up):

#if defined(LOGGER)      // CoEVP Makefile enforces assert: LOGGER=REDIS=yes
#include "LoggerDB.h"    // Includes Logger base class too
#include "Locator.h"
#endif

In exacly one place per process, usually in main, initialize the logger:

#if defined(LOGGER)
// Initialize logging to REDIS database
Locator::initialize();             // make sure a dummy logger exists
if (logging) {
#if defined(COEVP_MPI)
  int my_rank;
  MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
  char my_node[MPI_MAX_PROCESSOR_NAME];
  int name_len;
  MPI_Get_processor_name(my_node, &name_len);
  LoggerDB  *logger_db = new LoggerDB(logdb, std::string(my_node), my_rank);
#else
  LoggerDB  *logger_db = new LoggerDB(logdb);
#endif
  Locator::provide(logger_db);
 }

Logger  &logger = Locator::getLogger();
#endif

Using the logger:

#if defined(LOGGER)
Logger  &logger = Locator::getLogger();    //  get reference to logger
logger.logStartTimer("eval_fs_model");     //  start a timer
logger.logCountIncr("eval_fs_model");      //  increment a counter and send to REDIS
#endif
...
#if defined(LOGGER)
logger.logStopTimer("eval_fs_model");      //  stop a time and send et to REDIS
#endif

Analyzing the Logs