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perf annotate browser: Show 'jumpy' functions

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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>
This commit is contained in:
Arnaldo Carvalho de Melo 2012-05-12 16:21:53 -03:00
parent 7d5b12f5a0
commit 2402e4a936
1 changed files with 60 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
tools/perf/ui/browsers/annotate.c
View File

@ -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 */