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perf annotate browser: Hide non jump target addresses in offset mode

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This:

    0.00 :         ffffffff8116bd00:       lock btsl $0x0,(%r12)
  100.00 :         ffffffff8116bd07:       sbb    %eax,%eax
    0.00 :         ffffffff8116bd09:       test   %eax,%eax
    0.00 :         ffffffff8116bd0b:       jne    ffffffff8116bf5f <__mem_cgroup_commit_charge+0x28f>
    0.00 :         ffffffff8116bd11:       mov    (%r12),%rax
    0.00 :         ffffffff8116bd15:       test   $0x2,%al
    0.00 :         ffffffff8116bd17:       jne    ffffffff8116bf6e <__mem_cgroup_commit_charge+0x29e>
    0.00 :         ffffffff8116bd1d:       test   %r9b,%r9b
    0.00 :         ffffffff8116bd20:       jne    ffffffff8116be30 <__mem_cgroup_commit_charge+0x160>
    0.00 :         ffffffff8116bd26:       xor    %eax,%eax
    0.00 :         ffffffff8116bd28:       mov    %r13,0x8(%r12)
    0.00 :         ffffffff8116bd2d:       lock orb $0x2,(%r12)
    0.00 :         ffffffff8116bd33:       test   %r9b,%r9b
    0.00 :         ffffffff8116bd36:       je     ffffffff8116bdf3 <__mem_cgroup_commit_charge+0x123>

Becomes:

    0.00 :         30:       lock btsl $0x0,(%r12)
  100.00 :                   sbb    %eax,%eax
    0.00 :                   test   %eax,%eax
    0.00 :                   jne    28f
    0.00 :                   mov    (%r12),%rax
    0.00 :                   test   $0x2,%al
    0.00 :                   jne    29e
    0.00 :                   test   %r9b,%r9b
    0.00 :                   jne    160
    0.00 :         56:       xor    %eax,%eax
    0.00 :         58:       mov    %r13,0x8(%r12)
    0.00 :                   lock orb $0x2,(%r12)
    0.00 :                   test   %r9b,%r9b
    0.00 :                   je     123

I.e. We trow away all those useless addresses and keep just jump labels.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.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-r2vmbtgz0l8coluj8flztgrn@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2012-04-19 12:19:22 -03:00
parent 1b2e2df4e3
commit b793a40185
1 changed files with 58 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
tools/perf/ui/browsers/annotate.c
View File

@ -11,11 +11,20 @@
#include <pthread.h>
#include <newt.h>
struct browser_disasm_line {
struct rb_node rb_node;
double percent;
u32 idx;
int idx_asm;
bool jump_target;
};
struct annotate_browser {
struct ui_browser b;
struct rb_root entries;
struct rb_node *curr_hot;
struct disasm_line *selection;
struct disasm_line **offsets;
u64 start;
int nr_asm_entries;
int nr_entries;
@ -25,13 +34,6 @@ struct annotate_browser {
char search_bf[128];
};
struct browser_disasm_line {
struct rb_node rb_node;
double percent;
u32 idx;
int idx_asm;
};
static inline struct browser_disasm_line *disasm_line__browser(struct disasm_line *dl)
{
return (struct browser_disasm_line *)(dl + 1);
@ -53,6 +55,7 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro
{
struct annotate_browser *ab = container_of(self, struct annotate_browser, b);
struct disasm_line *dl = list_entry(entry, struct disasm_line, node);
struct browser_disasm_line *bdl = disasm_line__browser(dl);
bool current_entry = ui_browser__is_current_entry(self, row);
bool change_color = (!ab->hide_src_code &&
(!current_entry || (self->use_navkeypressed &&
@ -60,7 +63,6 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro
int width = self->width;
if (dl->offset != -1) {
struct browser_disasm_line *bdl = disasm_line__browser(dl);
ui_browser__set_percent_color(self, bdl->percent, current_entry);
slsmg_printf(" %7.2f ", bdl->percent);
} else {
@ -90,7 +92,11 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro
if (!ab->use_offset)
addr += ab->start;
printed = scnprintf(bf, sizeof(bf), " %" PRIx64 ":", addr);
if (bdl->jump_target || !ab->use_offset)
printed = scnprintf(bf, sizeof(bf), " %" PRIx64 ":", addr);
else
printed = scnprintf(bf, sizeof(bf), " ");
if (change_color)
color = ui_browser__set_color(self, HE_COLORSET_ADDR);
slsmg_write_nstring(bf, printed);
@ -593,12 +599,39 @@ int hist_entry__tui_annotate(struct hist_entry *he, int evidx,
timer, arg, delay_secs);
}
static void annotate_browser__mark_jump_targets(struct annotate_browser *browser,
size_t size)
{
u64 offset;
for (offset = 0; offset < size; ++offset) {
struct disasm_line *dl = browser->offsets[offset], *dlt;
struct browser_disasm_line *bdlt;
if (!dl || !dl->ins || !ins__is_jump(dl->ins))
continue;
if (dl->target >= size) {
ui__error("jump to after symbol!\n"
"size: %zx, jump target: %" PRIx64,
size, dl->target);
continue;
}
dlt = browser->offsets[dl->target];
bdlt = disasm_line__browser(dlt);
bdlt->jump_target = true;
}
}
int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
void(*timer)(void *arg), void *arg,
int delay_secs)
{
struct disasm_line *pos, *n;
struct annotation *notes;
const size_t size = symbol__size(sym);
struct map_symbol ms = {
.map = map,
.sym = sym,
@ -613,7 +646,7 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
.use_navkeypressed = true,
},
};
int ret;
int ret = -1;
if (sym == NULL)
return -1;
@ -621,9 +654,15 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
if (map->dso->annotate_warned)
return -1;
browser.offsets = zalloc(size * sizeof(struct disasm_line *));
if (browser.offsets == NULL) {
ui__error("Not enough memory!");
return -1;
}
if (symbol__annotate(sym, map, sizeof(struct browser_disasm_line)) < 0) {
ui__error("%s", ui_helpline__last_msg);
return -1;
goto out_free_offsets;
}
ui_helpline__push("Press <- or ESC to exit");
@ -639,12 +678,15 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
browser.b.width = line_len;
bpos = disasm_line__browser(pos);
bpos->idx = browser.nr_entries++;
if (pos->offset != -1)
if (pos->offset != -1) {
bpos->idx_asm = browser.nr_asm_entries++;
else
browser.offsets[pos->offset] = pos;
} else
bpos->idx_asm = -1;
}
annotate_browser__mark_jump_targets(&browser, size);
browser.b.nr_entries = browser.nr_entries;
browser.b.entries = &notes->src->source,
browser.b.width += 18; /* Percentage */
@ -653,5 +695,8 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
list_del(&pos->node);
disasm_line__free(pos);
}
out_free_offsets:
free(browser.offsets);
return ret;
}