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perf hists browser: Cleanup callchain print functions 

The hist_browser__show_callchain() and friends don't need to be that
complex.  They're splitted in 3 pieces - one for traversing top-level
tree, other one for special casing first chains in the top-level
entries, and last one for recursive traversing inner trees.  It led to
code duplication and unnecessary complexity IMHO.

Simplify the function and consolidate the logic into a single function
- it can recursively call itself.  A little difference in printing
  callchains in top-level tree can be handled with a small change.

It should have no functional change.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1408583746-5540-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2014-08-21 10:15:45 +09:00 committed by Arnaldo Carvalho de Melo
parent fbe2af45f6
commit c09a7e755c
1 changed files with 30 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

114
tools/perf/ui/browsers/hists.c
View File

@ -502,23 +502,16 @@ static void hist_browser__show_callchain_entry(struct hist_browser *browser,
#define LEVEL_OFFSET_STEP 3
static int hist_browser__show_callchain_node_rb_tree(struct hist_browser *browser,
struct callchain_node *chain_node,
u64 total, int level,
unsigned short row,
off_t *row_offset,
bool *is_current_entry)
static int hist_browser__show_callchain(struct hist_browser *browser,
struct rb_root *root, int level,
unsigned short row, off_t *row_offset,
u64 total, bool *is_current_entry)
{
struct rb_node *node;
int first_row = row, offset = level * LEVEL_OFFSET_STEP;
u64 new_total;
if (callchain_param.mode == CHAIN_GRAPH_REL)
new_total = chain_node->children_hit;
else
new_total = total;
node = rb_first(&chain_node->rb_root);
node = rb_first(root);
while (node) {
struct callchain_node *child = rb_entry(node, struct callchain_node, rb_node);
struct rb_node *next = rb_next(node);
@ -535,7 +528,7 @@ static int hist_browser__show_callchain_node_rb_tree(struct hist_browser *browse
if (first)
first = false;
else
else if (level > 1)
extra_offset = LEVEL_OFFSET_STEP;
folded_sign = callchain_list__folded(chain);
@ -547,8 +540,9 @@ static int hist_browser__show_callchain_node_rb_tree(struct hist_browser *browse
alloc_str = NULL;
str = callchain_list__sym_name(chain, bf, sizeof(bf),
browser->show_dso);
if (was_first) {
double percent = cumul * 100.0 / new_total;
if (was_first && level > 1) {
double percent = cumul * 100.0 / total;
if (asprintf(&alloc_str, "%2.2f%% %s", percent, str) < 0)
str = "Not enough memory!";
@ -571,81 +565,26 @@ do_next:
if (folded_sign == '-') {
const int new_level = level + (extra_offset ? 2 : 1);
row += hist_browser__show_callchain_node_rb_tree(browser, child, new_total,
new_level, row, row_offset,
is_current_entry);
if (callchain_param.mode == CHAIN_GRAPH_REL)
new_total = child->children_hit;
else
new_total = total;
row += hist_browser__show_callchain(browser, &child->rb_root,
new_level,
row, row_offset,
new_total,
is_current_entry);
}
if (row == browser->b.rows)
goto out;
break;
node = next;
}
out:
return row - first_row;
}
static int hist_browser__show_callchain_node(struct hist_browser *browser,
struct callchain_node *node,
int level, unsigned short row,
off_t *row_offset,
bool *is_current_entry)
{
struct callchain_list *chain;
int first_row = row;
int offset = level * LEVEL_OFFSET_STEP;
char folded_sign = ' ';
list_for_each_entry(chain, &node->val, list) {
char bf[1024], *s;
folded_sign = callchain_list__folded(chain);
if (*row_offset != 0) {
--*row_offset;
continue;
}
s = callchain_list__sym_name(chain, bf, sizeof(bf),
browser->show_dso);
hist_browser__show_callchain_entry(browser, chain, row,
offset, folded_sign, s,
is_current_entry);
if (++row == browser->b.rows)
goto out;
}
if (folded_sign == '-')
row += hist_browser__show_callchain_node_rb_tree(browser, node,
browser->hists->stats.total_period,
level + 1, row,
row_offset,
is_current_entry);
out:
return row - first_row;
}
static int hist_browser__show_callchain(struct hist_browser *browser,
struct rb_root *chain,
int level, unsigned short row,
off_t *row_offset,
bool *is_current_entry)
{
struct rb_node *nd;
int first_row = row;
for (nd = rb_first(chain); nd; nd = rb_next(nd)) {
struct callchain_node *node = rb_entry(nd, struct callchain_node, rb_node);
row += hist_browser__show_callchain_node(browser, node, level,
row, row_offset,
is_current_entry);
if (row == browser->b.rows)
break;
}
return row - first_row;
}
struct hpp_arg {
struct ui_browser *b;
char folded_sign;
@ -817,9 +756,16 @@ static int hist_browser__show_entry(struct hist_browser *browser,
--row_offset;
if (folded_sign == '-' && row != browser->b.rows) {
printed += hist_browser__show_callchain(browser, &entry->sorted_chain,
u64 total = hists__total_period(entry->hists);
if (symbol_conf.cumulate_callchain)
total = entry->stat_acc->period;
printed += hist_browser__show_callchain(browser,
&entry->sorted_chain,
1, row, &row_offset,
&current_entry);
total, &current_entry);
if (current_entry)
browser->he_selection = entry;
}