提交 b9ad8ee0 编写于 作者: L Len Brown

tools/power turbostat: end current interval upon newline input

In turbostat interval mode, a newline typed on standard input
will now conclude the current interval.  Data will immediately
be collected and printed for that interval, and the next interval
will be started.

This is similar to the recently added SIGUSR1 feature.
But that is for use by programs, while this is for interactive use.
Signed-off-by: NLen Brown <len.brown@intel.com>
上级 07211960
......@@ -267,6 +267,13 @@ CPU PRF_CTRL
.fi
.SH INPUT
For interval-mode, turbostat will immediately end the current interval
when it sees a newline on standard input.
turbostat will then start the next interval.
Control-C will be send a SIGINT to turbostat,
which will immediately abort the program with no further processing.
.SH SIGNALS
SIGINT will interrupt interval-mode.
......
......@@ -29,6 +29,7 @@
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/select.h>
#include <sys/resource.h>
#include <fcntl.h>
#include <signal.h>
......@@ -47,7 +48,8 @@
char *proc_stat = "/proc/stat";
FILE *outf;
int *fd_percpu;
struct timespec interval_ts = {5, 0};
struct timeval interval_tv = {5, 0};
struct timespec one_msec = {0, 1000000};
unsigned int debug;
unsigned int quiet;
unsigned int shown;
......@@ -478,7 +480,7 @@ void help(void)
"--cpu cpu-set limit output to summary plus cpu-set:\n"
" {core | package | j,k,l..m,n-p }\n"
"--quiet skip decoding system configuration header\n"
"--interval sec Override default 5-second measurement interval\n"
"--interval sec.subsec Override default 5-second measurement interval\n"
"--help print this help message\n"
"--list list column headers only\n"
"--out file create or truncate \"file\" for all output\n"
......@@ -2615,6 +2617,8 @@ static void signal_handler (int signal)
fprintf(stderr, "SIGUSR1\n");
break;
}
/* make sure this manually-invoked interval is at least 1ms long */
nanosleep(&one_msec, NULL);
}
void setup_signal_handler(void)
......@@ -2630,6 +2634,33 @@ void setup_signal_handler(void)
if (sigaction(SIGUSR1, &sa, NULL) < 0)
err(1, "sigaction SIGUSR1");
}
int do_sleep(void)
{
struct timeval select_timeout;
fd_set readfds;
int retval;
FD_ZERO(&readfds);
FD_SET(0, &readfds);
select_timeout = interval_tv;
retval = select(1, &readfds, NULL, NULL, &select_timeout);
if (retval == 1) {
switch (getc(stdin)) {
case 'q':
exit_requested = 1;
break;
}
/* make sure this manually-invoked interval is at least 1ms long */
nanosleep(&one_msec, NULL);
}
return retval;
}
void turbostat_loop()
{
int retval;
......@@ -2659,7 +2690,7 @@ void turbostat_loop()
re_initialize();
goto restart;
}
nanosleep(&interval_ts, NULL);
do_sleep();
if (snapshot_proc_sysfs_files())
goto restart;
retval = for_all_cpus(get_counters, ODD_COUNTERS);
......@@ -2680,7 +2711,7 @@ void turbostat_loop()
flush_output_stdout();
if (exit_requested)
break;
nanosleep(&interval_ts, NULL);
do_sleep();
if (snapshot_proc_sysfs_files())
goto restart;
retval = for_all_cpus(get_counters, EVEN_COUNTERS);
......@@ -5103,8 +5134,8 @@ void cmdline(int argc, char **argv)
exit(2);
}
interval_ts.tv_sec = interval;
interval_ts.tv_nsec = (interval - interval_ts.tv_sec) * 1000000000;
interval_tv.tv_sec = interval;
interval_tv.tv_usec = (interval - interval_tv.tv_sec) * 1000000;
}
break;
case 'J':
......
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