perf_counter tools: Provide helper to print percents color

Among perf annotate, perf report and perf top, we can find the
common colored printing of percents according to the following
rules:

    High overhead =  > 5%, colored in red
    Mid overhead =  > 0.5%, colored in green
    Low overhead =  < 0.5%, default color

Factorize these multiple checks in a single function named
percent_color_fprintf() and also provide a get_percent_color()
for sites which print percentages and other things at the same
time.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1246558475-10624-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 14 deletions

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index aa044ea1482b..95d5c0ae375a 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -239,7 +239,6 @@ static void print_sym_table(void)
         for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
                 struct sym_entry *syme = rb_entry(nd, struct sym_entry, rb_node);
                 struct symbol *sym = (struct symbol *)(syme + 1);
-                char *color = PERF_COLOR_NORMAL;
                 double pcnt;
 
                 if (++printed > print_entries || syme->snap_count < count_filter)
@@ -248,24 +247,12 @@ static void print_sym_table(void)
                 pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
                                          sum_ksamples));
 
-                /*
-                 * We color high-overhead entries in red, mid-overhead
-                 * entries in green - and keep the low overhead places
-                 * normal:
-                 */
-                if (pcnt >= 5.0) {
-                        color = PERF_COLOR_RED;
-                } else {
-                        if (pcnt >= 0.5)
-                                color = PERF_COLOR_GREEN;
-                }
-
                 if (nr_counters == 1)
                         printf("%20.2f - ", syme->weight);
                 else
                         printf("%9.1f %10ld - ", syme->weight, syme->snap_count);
 
-                color_fprintf(stdout, color, "%4.1f%%", pcnt);
+                percent_color_fprintf(stdout, "%4.1f%%", pcnt);
                 printf(" - %016llx : %s", sym->start, sym->name);
                 if (sym->module)
                         printf("\t[%s]", sym->module->name);