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#include <cctk.h>
#include <cstdio>
#include <cstdlib>
#include <string>
// IRIX wants this before <time.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# elif HAVE_TIME_H
# include <time.h>
# endif
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "startup_time.hh"
namespace CarpetLib {
using namespace std;
// Return the current wall time
static
double
get_walltime ()
{
#ifdef HAVE_TIME_GETTIMEOFDAY
// get the current time
struct timeval tv;
gettimeofday (& tv, 0);
return tv.tv_sec + tv.tv_usec / 1.0e6;
#else
return 0.0;
#endif
}
void
output_startup_time ()
{
char * const cactus_starttime = getenv ("CACTUS_STARTTIME");
if (not cactus_starttime) {
CCTK_VWarn (CCTK_WARN_PICKY,
__LINE__, __FILE__, CCTK_THORNSTRING,
"Could not determine Cactus startup time (environment variable CACTUS_STARTTIME is not set; it should be set to the output of \"date +%%s\")");
return;
}
double starttime;
int const iret = sscanf (cactus_starttime, "%lf", &starttime);
if (iret != 1) {
CCTK_VWarn (CCTK_WARN_COMPLAIN,
__LINE__, __FILE__, CCTK_THORNSTRING,
"Could not determine Cactus startup time (environment variable CACTUS_STARTTIME has illegal value \"%s\"; it should instead be set to the output of \"date +%%s\", which is a single number)",
cactus_starttime);
return;
}
double const currenttime = get_walltime ();
double const startuptime = currenttime - starttime;
CCTK_VInfo (CCTK_THORNSTRING,
"Process startup time was %.3g seconds", startuptime);
}
} // namespace CarpetLib
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