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perf top: Improve the autosizing of column lenghts

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When profiling C++ workloads the symbol name length can be
really big, so cap it before it garbles the result.

This builds upon the autosizing already present where we choose
to use the short, basename of DSOs instead of its long, full
pathname.

Reported-by: Pavel Krauz <krauz@cngroup.cz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1268676230-9261-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo
2010-03-15 15:03:50 -03:00
committed by Ingo Molnar
parent fc6ceea045
commit b63be8d7be
3 changed files with 24 additions and 10 deletions
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13
tools/perf/builtin-top.c
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@ -455,7 +455,7 @@ static void print_sym_table(void)
struct sym_entry *syme, *n;
struct rb_root tmp = RB_ROOT;
struct rb_node *nd;
int sym_width = 0, dso_width = 0, max_dso_width;
int sym_width = 0, dso_width = 0, dso_short_width;
const int win_width = winsize.ws_col - 1;
samples = userspace_samples = 0;
@ -545,15 +545,20 @@ static void print_sym_table(void)
if (syme->map->dso->long_name_len > dso_width)
dso_width = syme->map->dso->long_name_len;
if (syme->map->dso->short_name_len > dso_short_width)
dso_short_width = syme->map->dso->short_name_len;
if (syme->name_len > sym_width)
sym_width = syme->name_len;
}
printed = 0;
max_dso_width = winsize.ws_col - sym_width - 29;
if (dso_width > max_dso_width)
dso_width = max_dso_width;
if (sym_width + dso_width > winsize.ws_col - 29) {
dso_width = dso_short_width;
if (sym_width + dso_width > winsize.ws_col - 29)
sym_width = winsize.ws_col - dso_width - 29;
}
putchar('\n');
if (nr_counters == 1)
printf(" samples pcnt");