@@ -278,7 +278,7 @@ void list_monitors(void)
}
}
-int fork_it(char **argv)
+int fork_it(int cpu, char **argv)
{
int status;
unsigned int num;
@@ -315,9 +315,9 @@ int fork_it(char **argv)
timediff = timespec_diff_us(start, end);
if (WIFEXITED(status))
- printf(_("%s took %.5f seconds and exited with status %d\n"),
- argv[0], timediff / (1000.0 * 1000),
- WEXITSTATUS(status));
+ printf(_("cpu %d: %s took %.5f seconds and exited with status %d\n"),
+ cpu, argv[0],
+ timediff / (1000.0 * 1000), WEXITSTATUS(status));
return 0;
}
@@ -388,7 +388,8 @@ int cmd_monitor(int argc, char **argv)
{
unsigned int num;
struct cpuidle_monitor *test_mon;
- int cpu;
+ int cpu, status;
+ pid_t child_pid;
cmdline(argc, argv);
cpu_count = get_cpu_topology(&cpu_top);
@@ -440,10 +441,21 @@ int cmd_monitor(int argc, char **argv)
/*
* if any params left, it must be a command to fork
*/
- if (argc - optind)
- fork_it(argv + optind);
- else
+ if (argc - optind) {
+ for (cpu = 0; cpu < cpu_count; cpu++) {
+ child_pid = fork();
+ if (!child_pid) {
+ bind_cpu(cpu);
+ fork_it(cpu, argv + optind);
+ exit(EXIT_SUCCESS);
+ } else if (waitpid(child_pid, &status, 0) == -1) {
+ perror("waitpid");
+ exit(EXIT_FAILURE);
+ }
+ }
+ } else {
do_interval_measure(interval);
+ }
/* ToDo: Topology parsing needs fixing first to do
this more generically */
If we look inside cpupower/ToDo, the current 6th point makes mention of a method to implement multi-cpu monitoring without introducing noise to the tested program itself. Suggested-by: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com> Signed-off-by: Hamza Mahfooz <someguy@effective-light.com> --- .../utils/idle_monitor/cpupower-monitor.c | 28 +++++++++++++------ 1 file changed, 20 insertions(+), 8 deletions(-)