A very simple program, similar to cpucycle, but doing nothing more than looping indefinitively.
Signed-off-by: Daniel Lezcano daniel.lezcano@linaro.org --- utils/cpuburn.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 91 insertions(+), 0 deletions(-) create mode 100644 utils/cpuburn.c
diff --git a/utils/cpuburn.c b/utils/cpuburn.c new file mode 100644 index 0000000..12e82c0 --- /dev/null +++ b/utils/cpuburn.c @@ -0,0 +1,91 @@ +/******************************************************************************* + * PM-QA validation test suite for the power management on ARM + * + * Copyright (C) 2011, Linaro Limited. + * + * 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 2 + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Contributors: + * Daniel Lezcano daniel.lezcano@linaro.org (IBM Corporation) + * - initial API and implementation + * + *******************************************************************************/ + +#define _GNU_SOURCE +#include <sched.h> +#include <stdio.h> +#include <stdlib.h> +#include <stdbool.h> +#include <signal.h> +#include <unistd.h> +#include <regex.h> +#include <sys/types.h> +#include <sys/time.h> +#include <sys/resource.h> + +int main(int argc, char *argv[]) +{ + regex_t reg; + const char *regex = "cpu[0-9].*"; + char **aargv = NULL; + regmatch_t m[1]; + cpu_set_t cpuset; + int i; + + if (argc == 1) { + fprintf(stderr, "%s <cpuN> [cpuM] ... \n", argv[0]); + return 1; + } + + aargv = &argv[1]; + + if (regcomp(®, regex, 0)) { + fprintf(stderr, "failed to compile the regex\n"); + return 1; + } + + CPU_ZERO(&cpuset); + + for (i = 0; i < (argc - 1); i++) { + + char *aux; + int cpu; + + if (regexec(®, aargv[i], 1, m, 0)) { + fprintf(stderr, "'%s' parameter not recognized, " \ + "should be cpu[0-9]\n", aargv[i]); + return 1; + } + + aux = aargv[i] + 3; + cpu = atoi(aux); + + CPU_SET(cpu, &cpuset); + } + + if (sched_setaffinity(0, sizeof(cpuset), &cpuset)) { + perror("sched_setaffinity"); + return 1; + } + + if (setpriority(PRIO_PROCESS, 0, -20) < 0) { + perror("setpriority"); + return 1; + } + + for (;;); + + return 0; +}