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perf report: Add callchain value option

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Now -g/--call-graph option supports how to display callchain values.
Possible values are 'percent', 'period' and 'count'.  The percent is
same as before and it's the default behavior.  The period displays the
raw period value rather than the percentage.  The count displays the
number of occurrences.

  $ perf report --no-children --stdio -g percent
  ...
    39.93%  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--28.63%-- start_secondary
               |
                --11.30%-- rest_init

  $ perf report --no-children --show-total-period --stdio -g period
  ...
    39.93%   13018705  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--9334403-- start_secondary
               |
                --3684302-- rest_init

  $ perf report --no-children --show-nr-samples --stdio -g count
  ...
    39.93%     80  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--57-- start_secondary
               |
                --23-- rest_init

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1447047946-1691-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2015-11-09 14:45:41 +09:00 committed by Arnaldo Carvalho de Melo
parent 5e47f8ff40
commit f2af008695
6 changed files with 84 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
tools/perf/Documentation/perf-report.txt
View File

@ -170,11 +170,11 @@ OPTIONS
Dump raw trace in ASCII.
-g::
--call-graph=<print_type,threshold[,print_limit],order,sort_key,branch>::
--call-graph=<print_type,threshold[,print_limit],order,sort_key[,branch],value>::
Display call chains using type, min percent threshold, print limit,
call order, sort key and branch. Note that ordering of parameters is not
fixed so any parement can be given in an arbitraty order. One exception
is the print_limit which should be preceded by threshold.
call order, sort key, optional branch and value. Note that ordering of
parameters is not fixed so any parement can be given in an arbitraty order.
One exception is the print_limit which should be preceded by threshold.
print_type can be either:
- flat: single column, linear exposure of call chains.
@ -205,6 +205,11 @@ OPTIONS
- branch: include last branch information in callgraph when available.
Usually more convenient to use --branch-history for this.
value can be:
- percent: diplay overhead percent (default)
- period: display event period
- count: display event count
--children::
Accumulate callchain of children to parent entry so that then can
show up in the output. The output will have a new "Children" column

4
tools/perf/builtin-report.c
View File

@ -625,7 +625,7 @@ parse_percent_limit(const struct option *opt, const char *str,
return 0;
}
#define CALLCHAIN_DEFAULT_OPT "graph,0.5,caller,function"
#define CALLCHAIN_DEFAULT_OPT "graph,0.5,caller,function,percent"
const char report_callchain_help[] = "Display call graph (stack chain/backtrace):\n\n"
CALLCHAIN_REPORT_HELP
@ -708,7 +708,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
"Only display entries with parent-match"),
OPT_CALLBACK_DEFAULT('g', "call-graph", &report,
"print_type,threshold[,print_limit],order,sort_key[,branch]",
"print_type,threshold[,print_limit],order,sort_key[,branch],value",
report_callchain_help, &report_parse_callchain_opt,
callchain_default_opt),
OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,

10
tools/perf/ui/stdio/hist.c
View File

@ -81,13 +81,14 @@ static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
int depth_mask, int left_margin)
{
struct rb_node *node, *next;
struct callchain_node *child;
struct callchain_node *child = NULL;
struct callchain_list *chain;
int new_depth_mask = depth_mask;
u64 remaining;
size_t ret = 0;
int i;
uint entries_printed = 0;
int cumul_count = 0;
remaining = total_samples;
@ -99,6 +100,7 @@ static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
child = rb_entry(node, struct callchain_node, rb_node);
cumul = callchain_cumul_hits(child);
remaining -= cumul;
cumul_count += callchain_cumul_counts(child);
/*
* The depth mask manages the output of pipes that show
@ -148,6 +150,12 @@ static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
if (!rem_sq_bracket)
return ret;
if (callchain_param.value == CCVAL_COUNT && child && child->parent) {
rem_node.count = child->parent->children_count - cumul_count;
if (rem_node.count <= 0)
return ret;
}
new_depth_mask &= ~(1 << (depth - 1));
ret += ipchain__fprintf_graph(fp, &rem_node, &rem_hits, depth,
new_depth_mask, 0, total_samples,

62
tools/perf/util/callchain.c
View File

@ -83,6 +83,23 @@ static int parse_callchain_sort_key(const char *value)
return -1;
}
static int parse_callchain_value(const char *value)
{
if (!strncmp(value, "percent", strlen(value))) {
callchain_param.value = CCVAL_PERCENT;
return 0;
}
if (!strncmp(value, "period", strlen(value))) {
callchain_param.value = CCVAL_PERIOD;
return 0;
}
if (!strncmp(value, "count", strlen(value))) {
callchain_param.value = CCVAL_COUNT;
return 0;
}
return -1;
}
static int
__parse_callchain_report_opt(const char *arg, bool allow_record_opt)
{
@ -106,7 +123,8 @@ __parse_callchain_report_opt(const char *arg, bool allow_record_opt)
if (!parse_callchain_mode(tok) ||
!parse_callchain_order(tok) ||
!parse_callchain_sort_key(tok)) {
!parse_callchain_sort_key(tok) ||
!parse_callchain_value(tok)) {
/* parsing ok - move on to the next */
try_stack_size = false;
goto next;
@ -820,13 +838,27 @@ char *callchain_node__scnprintf_value(struct callchain_node *node,
{
double percent = 0.0;
u64 period = callchain_cumul_hits(node);
unsigned count = callchain_cumul_counts(node);
if (callchain_param.mode == CHAIN_FOLDED)
if (callchain_param.mode == CHAIN_FOLDED) {
period = node->hit;
if (total)
percent = period * 100.0 / total;
count = node->count;
}
scnprintf(bf, bfsize, "%.2f%%", percent);
switch (callchain_param.value) {
case CCVAL_PERIOD:
scnprintf(bf, bfsize, "%"PRIu64, period);
break;
case CCVAL_COUNT:
scnprintf(bf, bfsize, "%u", count);
break;
case CCVAL_PERCENT:
default:
if (total)
percent = period * 100.0 / total;
scnprintf(bf, bfsize, "%.2f%%", percent);
break;
}
return bf;
}
@ -835,13 +867,25 @@ int callchain_node__fprintf_value(struct callchain_node *node,
{
double percent = 0.0;
u64 period = callchain_cumul_hits(node);
unsigned count = callchain_cumul_counts(node);
if (callchain_param.mode == CHAIN_FOLDED)
if (callchain_param.mode == CHAIN_FOLDED) {
period = node->hit;
if (total)
percent = period * 100.0 / total;
count = node->count;
}
return percent_color_fprintf(fp, "%.2f%%", percent);
switch (callchain_param.value) {
case CCVAL_PERIOD:
return fprintf(fp, "%"PRIu64, period);
case CCVAL_COUNT:
return fprintf(fp, "%u", count);
case CCVAL_PERCENT:
default:
if (total)
percent = period * 100.0 / total;
return percent_color_fprintf(fp, "%.2f%%", percent);
}
return 0;
}
static void free_callchain_node(struct callchain_node *node)

10
tools/perf/util/callchain.h
View File

@ -29,7 +29,8 @@
HELP_PAD "print_limit:\tmaximum number of call graph entry (<number>)\n" \
HELP_PAD "order:\t\tcall graph order (caller|callee)\n" \
HELP_PAD "sort_key:\tcall graph sort key (function|address)\n" \
HELP_PAD "branch:\t\tinclude last branch info to call graph (branch)\n"
HELP_PAD "branch:\t\tinclude last branch info to call graph (branch)\n" \
HELP_PAD "value:\t\tcall graph value (percent|period|count)\n"
enum perf_call_graph_mode {
CALLCHAIN_NONE,
@ -81,6 +82,12 @@ enum chain_key {
CCKEY_ADDRESS
};
enum chain_value {
CCVAL_PERCENT,
CCVAL_PERIOD,
CCVAL_COUNT,
};
struct callchain_param {
bool enabled;
enum perf_call_graph_mode record_mode;
@ -93,6 +100,7 @@ struct callchain_param {
bool order_set;
enum chain_key key;
bool branch_callstack;
enum chain_value value;
};
extern struct callchain_param callchain_param;

3
tools/perf/util/util.c
View File

@ -21,7 +21,8 @@ struct callchain_param callchain_param = {
.mode = CHAIN_GRAPH_ABS,
.min_percent = 0.5,
.order = ORDER_CALLEE,
.key = CCKEY_FUNCTION
.key = CCKEY_FUNCTION,
.value = CCVAL_PERCENT,
};
/*