Em Thu, Jun 07, 2018 at 12:15:06AM +0200, Jiri Olsa escreveu: > Adding --interval-clear option to clear the screen > before next interval.
Better than: watch -n 0 perf stat -a sleep 1 :-) Tested and applied, - Arnaldo > Link: http://lkml.kernel.org/n/tip-8zobiwghr6t9f9a4o886c...@git.kernel.org > Signed-off-by: Jiri Olsa <jo...@kernel.org> > --- > tools/perf/Documentation/perf-stat.txt | 3 +++ > tools/perf/builtin-stat.c | 11 +++++++++-- > 2 files changed, 12 insertions(+), 2 deletions(-) > > diff --git a/tools/perf/Documentation/perf-stat.txt > b/tools/perf/Documentation/perf-stat.txt > index 5dfe102fb5b5..b10a90b6a718 100644 > --- a/tools/perf/Documentation/perf-stat.txt > +++ b/tools/perf/Documentation/perf-stat.txt > @@ -178,6 +178,9 @@ Print count deltas for fixed number of times. > This option should be used together with "-I" option. > example: 'perf stat -I 1000 --interval-count 2 -e cycles -a' > > +--interval-clear:: > +Clear the screen before next interval. > + > --timeout msecs:: > Stop the 'perf stat' session and print count deltas after N milliseconds > (minimum: 10 ms). > This option is not supported with the "-I" option. > diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c > index fce46252f89c..067d8b5b2c83 100644 > --- a/tools/perf/builtin-stat.c > +++ b/tools/perf/builtin-stat.c > @@ -65,6 +65,7 @@ > #include "util/tool.h" > #include "util/string2.h" > #include "util/metricgroup.h" > +#include "util/top.h" > #include "asm/bug.h" > > #include <linux/time64.h> > @@ -173,6 +174,7 @@ static struct cpu_map *aggr_map; > static aggr_get_id_t aggr_get_id; > static bool append_file; > static bool interval_count; > +static bool interval_clear; > static const char *output_name; > static int output_fd; > static int print_free_counters_hint; > @@ -1713,9 +1715,12 @@ static void print_interval(char *prefix, struct > timespec *ts) > FILE *output = stat_config.output; > static int num_print_interval; > > + if (interval_clear) > + puts(CONSOLE_CLEAR); > + > sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep); > > - if (num_print_interval == 0 && !csv_output) { > + if ((num_print_interval == 0 && !csv_output) || interval_clear) { > switch (stat_config.aggr_mode) { > case AGGR_SOCKET: > fprintf(output, "# time socket cpus"); > @@ -1747,7 +1752,7 @@ static void print_interval(char *prefix, struct > timespec *ts) > } > } > > - if (num_print_interval == 0 && metric_only) > + if ((num_print_interval == 0 && metric_only) || interval_clear) > print_metric_headers(" ", true); > if (++num_print_interval == 25) > num_print_interval = 0; > @@ -2066,6 +2071,8 @@ static const struct option stat_options[] = { > "(overhead is possible for values <= 100ms)"), > OPT_INTEGER(0, "interval-count", &stat_config.times, > "print counts for fixed number of times"), > + OPT_BOOLEAN(0, "interval-clear", &interval_clear, > + "clear screen in between new interval"), > OPT_UINTEGER(0, "timeout", &stat_config.timeout, > "stop workload and print counts after a timeout period in > ms (>= 10ms)"), > OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode, > -- > 2.13.6
