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Subject[PATCH 7/8] perf annotate browser: Show 'jumpy' functions
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

Just press 'J' and see how many places jump to jump targets.

The hottest jump target appears in red, targets with more than one
source have a different color than single source jump targets.

Suggested-by: Arjan van de Ven <arjan@infradead.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-7452y0dmc02a20ooins7rn79@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/ui/browsers/annotate.c | 65 ++++++++++++++++++++++++++++++++++---
1 file changed, 60 insertions(+), 5 deletions(-)
diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 4463626..547bd35 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -28,11 +28,16 @@ struct annotate_browser {
u64 start;
int nr_asm_entries;
int nr_entries;
+ int max_jump_sources;
+ int nr_jumps;
bool hide_src_code;
bool use_offset;
bool jump_arrows;
+ bool show_nr_jumps;
bool searching_backwards;
u8 addr_width;
+ u8 jumps_width;
+ u8 target_width;
u8 min_addr_width;
u8 max_addr_width;
char search_bf[128];
@@ -55,6 +60,25 @@ static bool disasm_line__filter(struct ui_browser *browser, void *entry)
return false;
}

+static int annotate_browser__jumps_percent_color(struct annotate_browser *browser,
+ int nr, bool current)
+{
+ if (current && (!browser->b.use_navkeypressed || browser->b.navkeypressed))
+ return HE_COLORSET_SELECTED;
+ if (nr == browser->max_jump_sources)
+ return HE_COLORSET_TOP;
+ if (nr > 1)
+ return HE_COLORSET_MEDIUM;
+ return HE_COLORSET_NORMAL;
+}
+
+static int annotate_browser__set_jumps_percent_color(struct annotate_browser *browser,
+ int nr, bool current)
+{
+ int color = annotate_browser__jumps_percent_color(browser, nr, current);
+ return ui_browser__set_color(&browser->b, color);
+}
+
static void annotate_browser__write(struct ui_browser *self, void *entry, int row)
{
struct annotate_browser *ab = container_of(self, struct annotate_browser, b);
@@ -99,8 +123,19 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro
printed = scnprintf(bf, sizeof(bf), "%" PRIx64 ": ", addr);
} else {
if (bdl->jump_sources) {
+ if (ab->show_nr_jumps) {
+ int prev;
+ printed = scnprintf(bf, sizeof(bf), "%*d ",
+ ab->jumps_width,
+ bdl->jump_sources);
+ prev = annotate_browser__set_jumps_percent_color(ab, bdl->jump_sources,
+ current_entry);
+ slsmg_write_nstring(bf, printed);
+ ui_browser__set_color(self, prev);
+ }
+
printed = scnprintf(bf, sizeof(bf), "%*" PRIx64 ": ",
- ab->addr_width, addr);
+ ab->target_width, addr);
} else {
printed = scnprintf(bf, sizeof(bf), "%*s ",
ab->addr_width, " ");
@@ -615,13 +650,20 @@ static int annotate_browser__run(struct annotate_browser *self, int evidx,
case 'o':
self->use_offset = !self->use_offset;
if (self->use_offset)
- self->addr_width = self->min_addr_width;
+ self->target_width = self->min_addr_width;
else
- self->addr_width = self->max_addr_width;
+ self->target_width = self->max_addr_width;
+update_addr_width:
+ self->addr_width = self->target_width;
+ if (self->show_nr_jumps)
+ self->addr_width += self->jumps_width + 1;
continue;
case 'j':
self->jump_arrows = !self->jump_arrows;
continue;
+ case 'J':
+ self->show_nr_jumps = !self->show_nr_jumps;
+ goto update_addr_width;
case '/':
if (annotate_browser__search(self, delay_secs)) {
show_help:
@@ -707,11 +749,23 @@ static void annotate_browser__mark_jump_targets(struct annotate_browser *browser
continue;

bdlt = disasm_line__browser(dlt);
- ++bdlt->jump_sources;
+ if (++bdlt->jump_sources > browser->max_jump_sources)
+ browser->max_jump_sources = bdlt->jump_sources;
+
+ ++browser->nr_jumps;
}

}

+static inline int width_jumps(int n)
+{
+ if (n >= 100)
+ return 5;
+ if (n / 10)
+ return 2;
+ return 1;
+}
+
int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
void(*timer)(void *arg), void *arg,
int delay_secs)
@@ -784,8 +838,9 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,

annotate_browser__mark_jump_targets(&browser, size);

- browser.addr_width = browser.min_addr_width = hex_width(size);
+ browser.addr_width = browser.target_width = browser.min_addr_width = hex_width(size);
browser.max_addr_width = hex_width(sym->end);
+ browser.jumps_width = width_jumps(browser.max_jump_sources);
browser.b.nr_entries = browser.nr_entries;
browser.b.entries = &notes->src->source,
browser.b.width += 18; /* Percentage */
--
1.7.9.2.358.g22243


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