Add Timer

[cindytsai]

Add Timer To Help Monitor Performance

• 50

Compile libyt with This Feature

Turn on SUPPORT_TIMER flag in Makefile:

# libyt/src/Makefile
# turn on the timer in each libyt substep.
#OPTIONS := -DSUPPORT_TIMER

This option is closed by default.

Set libyt Timer to Global

// include/yt_global.h
#ifdef SUPPORT_TIMER
#include "Timer.h"
SET_GLOBAL( Timer,         *g_timer,          NULL  );   // Timer for recording performance.
#endif // #ifdef SUPPORT_TIMER

Timer Class

• Initialize with file name

  char filename[50];
  sprintf(filename, "RecordTime_%d", MyRank);
  g_timer = new Timer(filename);

• Start record time with label.

  g_timer->record_time("yt_init", 0);

• End record time with label.

  g_timer->record_time("yt_init", 1);

• Print out current stored record time. Better flush out all the recording time before using the same label again. Otherwise it will be erased.

  g_timer->print_all_time();

View Result

• Currently, libyt sets record time file name in each MPI rank to RecordTime_*. With * represents MPI rank.
• Read it via Python:

  import pandas as pd
  df = pd.read_csv("RecordTime_0")