diff --git a/utils/.gitignore b/utils/.gitignore index d8b0d092..a84da8b1 100644 --- a/utils/.gitignore +++ b/utils/.gitignore @@ -27,6 +27,7 @@ rm rmdir sh tail +time type uname uptime diff --git a/utils/Makefile b/utils/Makefile index 9d6b3d71..39211138 100644 --- a/utils/Makefile +++ b/utils/Makefile @@ -44,6 +44,7 @@ rmdir \ sh \ tail \ type \ +time \ uname \ uptime \ which \ diff --git a/utils/time.cpp b/utils/time.cpp new file mode 100644 index 00000000..5dc4af20 --- /dev/null +++ b/utils/time.cpp @@ -0,0 +1,66 @@ +/******************************************************************************* + + Copyright(C) Jonas 'Sortie' Termansen 2013. + + This program 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, either version 3 of the License, or (at your option) + any later version. + + This program 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 + this program. If not, see . + + time.cpp + Measure process running time. + +*******************************************************************************/ + +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +int main(int argc, char* argv[]) +{ + struct timespec start_time; + clock_gettime(CLOCK_MONOTONIC, &start_time); + pid_t child_pid = fork(); + if ( child_pid < 0 ) + error(1, errno, "fork"); + if ( !child_pid ) + { + if ( argc <= 1 ) + exit(0); + execvp(argv[1], argv+1); + error(127, errno, "%s", argv[1]); + } + int exit_status = 0; + waitpid(child_pid, &exit_status, 0); + + struct timespec end_time; + clock_gettime(CLOCK_MONOTONIC, &end_time); + struct tmns tmns; + timens(&tmns); + struct timespec real_time = timespec_sub(end_time, start_time); + struct timespec execute_time = timespec_sub(tmns.tmns_cutime, tmns.tmns_utime); + struct timespec system_time = timespec_sub(tmns.tmns_cstime, tmns.tmns_stime); + struct timespec user_time = timespec_sub(execute_time, system_time); + + fprintf(stderr, "\n"); + fprintf(stderr, "real\t%lim%li.%03li\n", (long) real_time.tv_sec / 60, (long) real_time.tv_sec % 60, real_time.tv_nsec / 1000000L); + fprintf(stderr, "user\t%lim%li.%03li\n", (long) user_time.tv_sec / 60, (long) user_time.tv_sec % 60, user_time.tv_nsec / 1000000); + fprintf(stderr, "sys\t%lim%li.%03li\n", (long) system_time.tv_sec / 60, (long) system_time.tv_sec % 60, system_time.tv_nsec / 1000000); + + return WEXITSTATUS(exit_status); +}