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Date: Tue, 15 Jan 2013 14:39:53 +0100
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>
Subject: [PATCH 3/4] perf stat: Adding -f option to load and process ratios
Adding -f option to specify the formula definition to use.
Its value needs to be specified in following form:
'file:set'
where 'file' is the formula definition file and the 'set'
is the name of the set to use for output.
With following formula.conf config file:
---
cpi {
events = {cycles,instructions}:u
CPI {
formula = cycles / instructions
desc = cycles per instruction
}
}
branch {
events = {instructions,branch-instructions,branch-misses}:u
branch-rate {
formula = branch-instructions / instructions
desc = branch rate
}
branch-miss-rate {
formula = branch-misses / instructions
desc = branch misprediction rate
}
branch-miss-ratio{
formula = branch-misses / branch-instructions
desc = branch misprediction ratio
}
}
---
You'll get following result:
$ perf stat -f formula.conf:branch kill
usage: kill [ -s signal | -p ] [ -a ] pid ...
kill -l [ signal ]
Performance counter stats for 'kill':
184,195 instructions # 0.00 insns per cycle
40,907 branch-instructions
4,815 branch-misses # 11.77% of all branches
0.000655767 seconds time elapsed
0.22208529 branch-rate # branch rate
0.02614077 branch-miss-rate # branch misprediction rate
0.11770602 branch-miss-ratio # branch misprediction ratio
$ perf stat -f formula.conf:cpi kill
usage: kill [ -s signal | -p ] [ -a ] pid ...
kill -l [ signal ]
Performance counter stats for 'kill':
356,635 cycles # 0.000 GHz
187,191 instructions # 0.52 insns per cycle
0.001907600 seconds time elapsed
1.90519309 CPI # cycles per instruction
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>
---
tools/perf/builtin-stat.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 60 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 1c2ac14..06f79e5 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>
@@ -67,6 +68,9 @@
static struct perf_evlist *evsel_list;
+static struct perf_formula formula;
+static struct perf_formula__set *formula_set;
+
static struct perf_target target = {
.uid = UINT_MAX,
};
@@ -1065,6 +1069,42 @@ 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)
+{
+ char *name;
+
+ if (no_aggr) {
+ pr_err("failed to run formulas with no aggr mode\n");
+ return -1;
+ }
+
+ name = strrchr(str, ':');
+ if (!name) {
+ pr_err("need to specify set name\n");
+ return -1;
+ }
+
+ *name++ = 0x0;
+
+ pr_debug("formula file '%s', name '%s'\n", str, name);
+
+ perf_formula__init(&formula);
+
+ if (perf_formula__load(&formula, (char *) str)) {
+ pr_err("failed to load formula file '%s'\n", str);
+ return -1;
+ }
+
+ formula_set = perf_formula__set(&formula, name);
+ if (!formula_set) {
+ pr_err("failed to find formula counter '%s'\n", name);
+ return -1;
+ }
+
+ return 0;
+}
+
int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
{
bool append_file = false;
@@ -1076,6 +1116,9 @@ 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[:name]",
+ formula_option),
OPT_BOOLEAN('i', "no-inherit", &no_inherit,
"child tasks do not inherit counters"),
OPT_STRING('p', "pid", &target.pid, "pid",
@@ -1134,6 +1177,12 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
argc = parse_options(argc, argv, options, stat_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
+ if (formula_set &&
+ perf_formula__evlist(formula_set, evsel_list)) {
+ fprintf(stderr, "failed to load formula events\n");
+ usage_with_options(stat_usage, options);
+ }
+
output = stderr;
if (output_name && strcmp(output_name, "-"))
output = NULL;
@@ -1242,13 +1291,23 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
status = run_perf_stat(argc, argv);
}
- if (status != -1)
+ if (status != -1) {
print_stat(argc, argv);
+
+ if (formula_set)
+ perf_formula__print(output, formula_set,
+ evsel_list, NULL);
+ }
+
out_free_fd:
list_for_each_entry(pos, &evsel_list->entries, node)
perf_evsel__free_stat_priv(pos);
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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