- 根目录:
- tools
- perf
- ui
- stdio
- hist.c
#include <stdio.h>
#include "../../util/util.h"
#include "../../util/hist.h"
#include "../../util/sort.h"
#include "../../util/evsel.h"
static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
{
int i;
int ret = fprintf(fp, " ");
for (i = 0; i < left_margin; i++)
ret += fprintf(fp, " ");
return ret;
}
static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask,
int left_margin)
{
int i;
size_t ret = callchain__fprintf_left_margin(fp, left_margin);
for (i = 0; i < depth; i++)
if (depth_mask & (1 << i))
ret += fprintf(fp, "| ");
else
ret += fprintf(fp, " ");
ret += fprintf(fp, "\n");
return ret;
}
static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_list *chain,
int depth, int depth_mask, int period,
u64 total_samples, u64 hits,
int left_margin)
{
int i;
size_t ret = 0;
char bf[1024];
ret += callchain__fprintf_left_margin(fp, left_margin);
for (i = 0; i < depth; i++) {
if (depth_mask & (1 << i))
ret += fprintf(fp, "|");
else
ret += fprintf(fp, " ");
if (!period && i == depth - 1) {
double percent;
percent = hits * 100.0 / total_samples;
ret += percent_color_fprintf(fp, "--%2.2f%%-- ", percent);
} else
ret += fprintf(fp, "%s", " ");
}
fputs(callchain_list__sym_name(chain, bf, sizeof(bf), false), fp);
fputc('\n', fp);
return ret;
}
static struct symbol *rem_sq_bracket;
static struct callchain_list rem_hits;
static void init_rem_hits(void)
{
rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
if (!rem_sq_bracket) {
fprintf(stderr, "Not enough memory to display remaining hits\n");
return;
}
strcpy(rem_sq_bracket->name, "[...]");
rem_hits.ms.sym = rem_sq_bracket;
}
static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
u64 total_samples, int depth,
int depth_mask, int left_margin)
{
struct rb_node *node, *next;
struct callchain_node *child;
struct callchain_list *chain;
int new_depth_mask = depth_mask;
u64 remaining;
size_t ret = 0;
int i;
uint entries_printed = 0;
remaining = total_samples;
node = rb_first(root);
while (node) {
u64 new_total;
u64 cumul;
child = rb_entry(node, struct callchain_node, rb_node);
cumul = callchain_cumul_hits(child);
remaining -= cumul;
/*
* The depth mask manages the output of pipes that show
* the depth. We don't want to keep the pipes of the current
* level for the last child of this depth.
* Except if we have remaining filtered hits. They will
* supersede the last child
*/
next = rb_next(node);
if (!next && (callchain_param.mode != CHAIN_GRAPH_REL || !remaining))
new_depth_mask &= ~(1 << (depth - 1));
/*
* But we keep the older depth mask for the line separator
* to keep the level link until we reach the last child
*/
ret += ipchain__fprintf_graph_line(fp, depth, depth_mask,
left_margin);
i = 0;
list_for_each_entry(chain, &child->val, list) {
ret += ipchain__fprintf_graph(fp, chain, depth,
new_depth_mask, i++,
total_samples,
cumul,
left_margin);
}
if (callchain_param.mode == CHAIN_GRAPH_REL)
new_total = child->children_hit;
else
new_total = total_samples;
ret += __callchain__fprintf_graph(fp, &child->rb_root, new_total,
depth + 1,
new_depth_mask | (1 << depth),
left_margin);
node = next;
if (++entries_printed == callchain_param.print_limit)
break;
}
if (callchain_param.mode == CHAIN_GRAPH_REL &&
remaining && remaining != total_samples) {
if (!rem_sq_bracket)
return ret;
new_depth_mask &= ~(1 << (depth - 1));
ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
new_depth_mask, 0, total_samples,
remaining, left_margin);
}
return ret;
}
static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
u64 total_samples, int left_margin)
{
struct callchain_node *cnode;
struct callchain_list *chain;
u32 entries_printed = 0;
bool printed = false;
struct rb_node *node;
int i = 0;
int ret = 0;
char bf[1024];
/*
* If have one single callchain root, don't bother printing
* its percentage (100 % in fractal mode and the same percentage
* than the hist in graph mode). This also avoid one level of column.
*/
node = rb_first(root);
if (node && !rb_next(node)) {
cnode = rb_entry(node, struct callchain_node, rb_node);
list_for_each_entry(chain, &cnode->val, list) {
/*
* If we sort by symbol, the first entry is the same than
* the symbol. No need to print it otherwise it appears as
* displayed twice.
*/
if (!i++ && field_order == NULL &&
sort_order && !prefixcmp(sort_order, "sym"))
continue;
if (!printed) {
ret += callchain__fprintf_left_margin(fp, left_margin);
ret += fprintf(fp, "|\n");
ret += callchain__fprintf_left_margin(fp, left_margin);
ret += fprintf(fp, "---");
left_margin += 3;
printed = true;
} else
ret += callchain__fprintf_left_margin(fp, left_margin);
ret += fprintf(fp, "%s\n", callchain_list__sym_name(chain, bf, sizeof(bf),
false));
if (++entries_printed == callchain_param.print_limit)
break;
}
root = &cnode->rb_root;
}
ret += __callchain__fprintf_graph(fp, root, total_samples,
1, 1, left_margin);
ret += fprintf(fp, "\n");
return ret;
}
static size_t __callchain__fprintf_flat(FILE *fp, struct callchain_node *node,
u64 total_samples)
{
struct callchain_list *chain;
size_t ret = 0;
char bf[1024];
if (!node)
return 0;
ret += __callchain__fprintf_flat(fp, node->parent, total_samples);
list_for_each_entry(chain, &node->val, list) {
if (chain->ip >= PERF_CONTEXT_MAX)
continue;
ret += fprintf(fp, " %s\n", callchain_list__sym_name(chain,
bf, sizeof(bf), false));
}
return ret;
}
static size_t callchain__fprintf_flat(FILE *fp, struct rb_root *tree,
u64 total_samples)
{
size_t ret = 0;
u32 entries_printed = 0;
struct callchain_node *chain;
struct rb_node *rb_node = rb_first(tree);
while (rb_node) {
double percent;
chain = rb_entry(rb_node, struct callchain_node, rb_node);
percent = chain->hit * 100.0 / total_samples;
ret = percent_color_fprintf(fp, " %6.2f%%\n", percent);
ret += __callchain__fprintf_flat(fp, chain, total_samples);
ret += fprintf(fp, "\n");
if (++entries_printed == callchain_param.print_limit)
break;
rb_node = rb_next(rb_node);
}
return ret;
}
static size_t hist_entry_callchain__fprintf(struct hist_entry *he,
u64 total_samples, int left_margin,
FILE *fp)
{
switch (callchain_param.mode) {
case CHAIN_GRAPH_REL:
return callchain__fprintf_graph(fp, &he->sorted_chain,
symbol_conf.cumulate_callchain ?
he->stat_acc->period : he->stat.period,
left_margin);
break;
case CHAIN_GRAPH_ABS:
return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
left_margin);
break;
case CHAIN_FLAT:
return callchain__fprintf_flat(fp, &he->sorted_chain, total_samples);
break;
case CHAIN_NONE:
break;
default:
pr_err("Bad callchain mode\n");
}
return 0;
}
static size_t hist_entry__callchain_fprintf(struct hist_entry *he,
struct hists *hists,
FILE *fp)
{
int left_margin = 0;
u64 total_period = hists->stats.total_period;
if (field_order == NULL && (sort_order == NULL ||
!prefixcmp(sort_order, "comm"))) {
struct perf_hpp_fmt *fmt;
perf_hpp__for_each_format(fmt) {
if (!perf_hpp__is_sort_entry(fmt))
continue;
/* must be 'comm' sort entry */
left_margin = fmt->width(fmt, NULL, hists_to_evsel(hists));
left_margin -= thread__comm_len(he->thread);
break;
}
}
return hist_entry_callchain__fprintf(he, total_period, left_margin, fp);
}
static int hist_entry__snprintf(struct hist_entry *he, struct perf_hpp *hpp)
{
const char *sep = symbol_conf.field_sep;
struct perf_hpp_fmt *fmt;
char *start = hpp->buf;
int ret;
bool first = true;
if (symbol_conf.exclude_other && !he->parent)
return 0;
perf_hpp__for_each_format(fmt) {
if (perf_hpp__should_skip(fmt))
continue;
/*
* If there's no field_sep, we still need
* to display initial ' '.
*/
if (!sep || !first) {
ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: " ");
advance_hpp(hpp, ret);
} else
first = false;
if (perf_hpp__use_color() && fmt->color)
ret = fmt->color(fmt, hpp, he);
else
ret = fmt->entry(fmt, hpp, he);
advance_hpp(hpp, ret);
}
return hpp->buf - start;
}
static int hist_entry__fprintf(struct hist_entry *he, size_t size,
struct hists *hists,
char *bf, size_t bfsz, FILE *fp)
{
int ret;
struct perf_hpp hpp = {
.buf = bf,
.size = size,
};
if (size == 0 || size > bfsz)
size = hpp.size = bfsz;
hist_entry__snprintf(he, &hpp);
ret = fprintf(fp, "%s\n", bf);
if (symbol_conf.use_callchain)
ret += hist_entry__callchain_fprintf(he, hists, fp);
return ret;
}
size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
int max_cols, float min_pcnt, FILE *fp)
{
struct perf_hpp_fmt *fmt;
struct rb_node *nd;
size_t ret = 0;
unsigned int width;
const char *sep = symbol_conf.field_sep;
int nr_rows = 0;
char bf[96];
struct perf_hpp dummy_hpp = {
.buf = bf,
.size = sizeof(bf),
};
bool first = true;
size_t linesz;
char *line = NULL;
init_rem_hits();
perf_hpp__for_each_format(fmt)
perf_hpp__reset_width(fmt, hists);
if (symbol_conf.col_width_list_str)
perf_hpp__set_user_width(symbol_conf.col_width_list_str);
if (!show_header)
goto print_entries;
fprintf(fp, "# ");
perf_hpp__for_each_format(fmt) {
if (perf_hpp__should_skip(fmt))
continue;
if (!first)
fprintf(fp, "%s", sep ?: " ");
else
first = false;
fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
fprintf(fp, "%s", bf);
}
fprintf(fp, "\n");
if (max_rows && ++nr_rows >= max_rows)
goto out;
if (sep)
goto print_entries;
first = true;
fprintf(fp, "# ");
perf_hpp__for_each_format(fmt) {
unsigned int i;
if (perf_hpp__should_skip(fmt))
continue;
if (!first)
fprintf(fp, "%s", sep ?: " ");
else
first = false;
width = fmt->width(fmt, &dummy_hpp, hists_to_evsel(hists));
for (i = 0; i < width; i++)
fprintf(fp, ".");
}
fprintf(fp, "\n");
if (max_rows && ++nr_rows >= max_rows)
goto out;
fprintf(fp, "#\n");
if (max_rows && ++nr_rows >= max_rows)
goto out;
print_entries:
linesz = hists__sort_list_width(hists) + 3 + 1;
linesz += perf_hpp__color_overhead();
line = malloc(linesz);
if (line == NULL) {
ret = -1;
goto out;
}
for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
float percent;
if (h->filtered)
continue;
percent = hist_entry__get_percent_limit(h);
if (percent < min_pcnt)
continue;
ret += hist_entry__fprintf(h, max_cols, hists, line, linesz, fp);
if (max_rows && ++nr_rows >= max_rows)
break;
if (h->ms.map == NULL && verbose > 1) {
__map_groups__fprintf_maps(h->thread->mg,
MAP__FUNCTION, fp);
fprintf(fp, "%.10s end\n", graph_dotted_line);
}
}
free(line);
out:
zfree(&rem_sq_bracket);
return ret;
}
size_t events_stats__fprintf(struct events_stats *stats, FILE *fp)
{
int i;
size_t ret = 0;
for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
const char *name;
if (stats->nr_events[i] == 0)
continue;
name = perf_event__name(i);
if (!strcmp(name, "UNKNOWN"))
continue;
ret += fprintf(fp, "%16s events: %10d\n", name,
stats->nr_events[i]);
}
return ret;
}