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Date: Wed, 1 May 2013 17:15:45 +0200
From: Jiri Olsa <jolsa@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Jiri Olsa <jolsa@...hat.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Andi Kleen <andi@...stfloor.org>,
David Ahern <dsahern@...il.com>,
Ulrich Drepper <drepper@...il.com>,
Will Deacon <will.deacon@....com>,
Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 7/8] perf stat: Add support to process formulas
Adding -f option to specify the formula configuration file
to load. The formula name itself is specified within the
'-e' option.
With following formula.conf config file:
---
cpi {
events {
CY = cycles:u
IN = instructions:u
}
cpi = CY / IN
print cpi
}
branch {
events {
IN = instructions:u
BI = branch-instructions:u
BM = branch-misses:u
}
branch-rate = BI / IN
branch-miss-rate = BM / IN
branch-miss-ratio = BM / BI
print branch-rate
print branch-miss-rate
print branch-miss-ratio
}
---
You'll get following result:
$ ./perf stat -f formula.conf -e formula-branch kill
usage: kill [ -s signal | -p ] [ -a ] pid ...
kill -l [ signal ]
Performance counter stats for 'kill':
187,342 instructions:u # 0.00 insns per cycle
41,996 branch-instructions:u
4,826 branch-misses:u # 11.49% of all branches
0.054313993 seconds time elapsed
0.22416757 branch-rate
0.02576037 branch-miss-rate
0.11491571 branch-miss-ratio
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Ulrich Drepper <drepper@...il.com>
Cc: Will Deacon <will.deacon@....com>
Cc: Stephane Eranian <eranian@...gle.com>
---
tools/perf/builtin-stat.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 82 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 7e910ba..b703307 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -56,6 +56,7 @@
#include "util/cpumap.h"
#include "util/thread.h"
#include "util/thread_map.h"
+#include "util/formula.h"
#include <stdlib.h>
#include <sys/prctl.h>
@@ -72,6 +73,10 @@ static void print_aggr(char *prefix);
static struct perf_evlist *evsel_list;
+static struct perf_formula formula;
+static struct perf_formula_set *formula_set;
+static bool formula_no_preload;
+
static struct perf_target target = {
.uid = UINT_MAX,
};
@@ -380,6 +385,12 @@ static void print_interval(void)
diff_timespec(&rs, &ts, &ref_time);
sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
+ if (formula_set) {
+ perf_formula__print(output, &formula, formula_set,
+ evsel_list, NULL);
+ return;
+ }
+
if (num_print_interval == 0 && !csv_output) {
switch (aggr_mode) {
case AGGR_SOCKET:
@@ -1340,6 +1351,51 @@ static int add_default_attributes(void)
return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
}
+static int formula_option(const struct option *opt __maybe_unused,
+ const char *str, int unset __maybe_unused)
+{
+ if (perf_formula__load(&formula, (char *) str)) {
+ pr_err("formula: failed to load formula file '%s'\n", str);
+ return -1;
+ }
+
+ formula_no_preload = true;
+
+ pr_debug("formula file '%s'\n", str);
+ return 0;
+}
+
+static int formula_resolve(struct perf_evlist *evlist)
+{
+ char **f = evlist->formulas;
+ char *name = *f;
+
+ if (!formula_no_preload && perf_formula__preload(&formula)) {
+ pr_err("formula: failed to preload default formulas\n");
+ return -1;
+ }
+
+ if (f[1]) {
+ pr_err("formula: only single formula supported for stat\n");
+ return -1;
+ }
+
+ formula_set = perf_formula__set(&formula, name);
+ if (!formula_set) {
+ pr_err("formula: failed to find formula '%s'\n", name);
+ return -1;
+ }
+
+ if (perf_formula__evlist(&formula, formula_set, evlist)) {
+ pr_err("formula: failed to load formula events for %s\n",
+ name);
+ return -1;
+ }
+
+ pr_debug("loaded formula '%s'\n", name);
+ return 0;
+}
+
int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
{
bool append_file = false;
@@ -1351,6 +1407,9 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
parse_events_option),
OPT_CALLBACK(0, "filter", &evsel_list, "filter",
"event filter", parse_filter),
+ OPT_CALLBACK('f', "formula", NULL, "formula",
+ "counters formula file",
+ formula_option),
OPT_BOOLEAN('i', "no-inherit", &no_inherit,
"child tasks do not inherit counters"),
OPT_STRING('p', "pid", &target.pid, "pid",
@@ -1412,9 +1471,22 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
if (evsel_list == NULL)
return -ENOMEM;
+ perf_formula__init(&formula);
+
argc = parse_options(argc, argv, options, stat_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
+ if (perf_evlist__has_formulas(evsel_list)) {
+ if (aggr_mode == AGGR_NONE) {
+ pr_err("formula: Cannot run formulas with "
+ "no aggr mode\n");
+ return -1;
+ }
+
+ if (formula_resolve(evsel_list))
+ usage_with_options(stat_usage, options);
+ }
+
output = stderr;
if (output_name && strcmp(output_name, "-"))
output = NULL;
@@ -1540,13 +1612,22 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
}
}
- if (!forever && status != -1 && !interval)
+ if (!forever && status != -1 && !interval) {
print_stat(argc, argv);
+ if (formula_set)
+ perf_formula__print(output, &formula, formula_set,
+ evsel_list, NULL);
+ }
+
perf_evlist__free_stats(evsel_list);
out_free_maps:
perf_evlist__delete_maps(evsel_list);
out:
perf_evlist__delete(evsel_list);
+
+ if (formula_set)
+ perf_formula__free(&formula);
+
return status;
}
--
1.7.11.7
--
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