[PATCH 1/3] perf sched timehist: Enlarge default comm_width

[Namhyung Kim]

Current default value is 20 but it's easily changed to a bigger value as
task has a long name and different tid and pid.  And it makes the output
not aligned.  So change it to have a large value as summary shows.

Signed-off-by: Namhyung Kim <namhy...@kernel.org>
---
 tools/perf/builtin-sched.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index c1c07bfe132c..5052caa91caa 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1775,7 +1775,7 @@ static u64 perf_evsel__get_time(struct perf_evsel *evsel, 
u32 cpu)
        return r->last_time[cpu];
 }
 
-static int comm_width = 20;
+static int comm_width = 30;
 
 static char *timehist_get_commstr(struct thread *thread)
 {
@@ -1817,7 +1817,7 @@ static void timehist_header(struct perf_sched *sched)
                printf(" ");
        }
 
-       printf(" %-20s  %9s  %9s  %9s",
+       printf(" %-*s  %9s  %9s  %9s", comm_width,
                "task name", "wait time", "sch delay", "run time");
 
        printf("\n");
@@ -1830,7 +1830,8 @@ static void timehist_header(struct perf_sched *sched)
        if (sched->show_cpu_visual)
                printf(" %*s ", ncpus, "");
 
-       printf(" %-20s  %9s  %9s  %9s\n", "[tid/pid]", "(msec)", "(msec)", 
"(msec)");
+       printf(" %-*s  %9s  %9s  %9s\n", comm_width,
+              "[tid/pid]", "(msec)", "(msec)", "(msec)");
 
        /*
         * separator
@@ -1840,7 +1841,7 @@ static void timehist_header(struct perf_sched *sched)
        if (sched->show_cpu_visual)
                printf(" %.*s ", ncpus, graph_dotted_line);
 
-       printf(" %.20s  %.9s  %.9s  %.9s",
+       printf(" %.*s  %.9s  %.9s  %.9s", comm_width,
                graph_dotted_line, graph_dotted_line, graph_dotted_line,
                graph_dotted_line);
 
@@ -2626,9 +2627,6 @@ static void timehist_print_summary(struct perf_sched 
*sched,
 
        memset(&totals, 0, sizeof(totals));
 
-       if (comm_width < 30)
-               comm_width = 30;
-
        if (sched->idle_hist) {
                printf("\nIdle-time summary\n");
                printf("%*s  parent  sched-out  ", comm_width, "comm");
-- 
2.10.0