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tools/power turbostat: on SIGINT: sample, print and exit

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When running in interval-mode, catch interrupts
and print a final data record before exiting.

Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown 2017-07-15 14:57:37 -04:00
parent 3f44a5c62b
commit 8aa2ed0b28
2 changed files with 34 additions and 0 deletions
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4
tools/power/x86/turbostat/turbostat.8
View File

@ -267,6 +267,10 @@ CPU PRF_CTRL
.fi
.SH SIGNALS
SIGINT will interrupt interval-mode.
The end-of-interval data will be collected and displayed before turbostat exits.
.SH NOTES
.B "turbostat "

30
tools/power/x86/turbostat/turbostat.c
View File

@ -2600,11 +2600,37 @@ int snapshot_proc_sysfs_files(void)
return 0;
}
int exit_requested;
static void signal_handler (int signal)
{
switch (signal) {
case SIGINT:
exit_requested = 1;
if (debug)
fprintf(stderr, " SIGINT\n");
break;
}
}
void setup_signal_handler(void)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = &signal_handler;
if (sigaction(SIGINT, &sa, NULL) < 0)
err(1, "sigaction SIGINT");
}
void turbostat_loop()
{
int retval;
int restarted = 0;
setup_signal_handler();
restart:
restarted++;
@ -2646,6 +2672,8 @@ restart:
compute_average(EVEN_COUNTERS);
format_all_counters(EVEN_COUNTERS);
flush_output_stdout();
if (exit_requested)
break;
nanosleep(&interval_ts, NULL);
if (snapshot_proc_sysfs_files())
goto restart;
@ -2665,6 +2693,8 @@ restart:
compute_average(ODD_COUNTERS);
format_all_counters(ODD_COUNTERS);
flush_output_stdout();
if (exit_requested)
break;
}
}