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Date: Tue, 4 Jun 2024 23:38:28 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>, linux-perf-users@...r.kernel.org,
linux-kernel@...r.kernel.org, Stephane Eranian <eranian@...gle.com>
Subject: [RFC PATCH v1 2/2] perf stat: Choose the most disaggregate command
line option
When multiple aggregation options are passed to perf stat the behavior
isn't clear. Consider "perf stat -A --per-socket .." and "perf stat
--per-socket -A ..", the first won't aggregate at all while the second
will do per-socket aggregation, even though the same options were
passed.
Rather than set an enum value, gather the options in a struct and
process them from most to least aggregate. This ensures the least
aggregate option always applies, so no aggregation if "-A" is passed.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/builtin-stat.c | 73 ++++++++++++++++++++++++++++-----------
1 file changed, 52 insertions(+), 21 deletions(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 6227b25d1446..603a9684153d 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -164,6 +164,35 @@ static struct perf_stat_config stat_config = {
.iostat_run = false,
};
+/* Options set from the command line. */
+struct opt_aggr_mode {
+ bool node, socket, die, cluster, cache, core, thread, no_aggr;
+};
+
+/* Turn command line option into most generic aggregation mode setting. */
+static enum aggr_mode opt_aggr_mode_to_aggr_mode(struct opt_aggr_mode *opt_mode)
+{
+ enum aggr_mode mode = AGGR_GLOBAL;
+
+ if (opt_mode->node)
+ mode = AGGR_NODE;
+ if (opt_mode->socket)
+ mode = AGGR_SOCKET;
+ if (opt_mode->die)
+ mode = AGGR_DIE;
+ if (opt_mode->cluster)
+ mode = AGGR_CLUSTER;
+ if (opt_mode->cache)
+ mode = AGGR_CACHE;
+ if (opt_mode->core)
+ mode = AGGR_CORE;
+ if (opt_mode->thread)
+ mode = AGGR_THREAD;
+ if (opt_mode->no_aggr)
+ mode = AGGR_NONE;
+ return mode;
+}
+
static void evlist__check_cpu_maps(struct evlist *evlist)
{
struct evsel *evsel, *warned_leader = NULL;
@@ -1096,7 +1125,7 @@ static int parse_cache_level(const struct option *opt,
int unset __maybe_unused)
{
int level;
- u32 *aggr_mode = (u32 *)opt->value;
+ struct opt_aggr_mode *opt_aggr_mode = (struct opt_aggr_mode *)opt->value;
u32 *aggr_level = (u32 *)opt->data;
/*
@@ -1135,7 +1164,7 @@ static int parse_cache_level(const struct option *opt,
return -EINVAL;
}
out:
- *aggr_mode = AGGR_CACHE;
+ opt_aggr_mode->cache = true;
*aggr_level = level;
return 0;
}
@@ -2101,13 +2130,15 @@ static void init_features(struct perf_session *session)
perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
}
-static int __cmd_record(const struct option stat_options[], int argc, const char **argv)
+static int __cmd_record(const struct option stat_options[], struct opt_aggr_mode *opt_mode,
+ int argc, const char **argv)
{
struct perf_session *session;
struct perf_data *data = &perf_stat.data;
argc = parse_options(argc, argv, stat_options, stat_record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
+ stat_config.aggr_mode = opt_aggr_mode_to_aggr_mode(opt_mode);
if (output_name)
data->path = output_name;
@@ -2350,6 +2381,7 @@ static void setup_system_wide(int forks)
int cmd_stat(int argc, const char **argv)
{
+ struct opt_aggr_mode opt_mode = {};
struct option stat_options[] = {
OPT_BOOLEAN('T', "transaction", &transaction_run,
"hardware transaction statistics"),
@@ -2393,10 +2425,10 @@ int cmd_stat(int argc, const char **argv)
stat__set_big_num),
OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
"list of cpus to monitor in system-wide"),
- OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
- "disable aggregation across CPUs or PMUs", AGGR_NONE),
- OPT_SET_UINT(0, "no-merge", &stat_config.aggr_mode,
- "disable aggregation the same as -A or -no-aggr", AGGR_NONE),
+ OPT_BOOLEAN('A', "no-aggr", &opt_mode.no_aggr,
+ "disable aggregation across CPUs or PMUs"),
+ OPT_BOOLEAN(0, "no-merge", &opt_mode.no_aggr,
+ "disable aggregation the same as -A or -no-aggr"),
OPT_BOOLEAN(0, "hybrid-merge", &stat_config.hybrid_merge,
"Merge identical named hybrid events"),
OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
@@ -2424,21 +2456,18 @@ int cmd_stat(int argc, const char **argv)
"clear screen in between new interval"),
OPT_UINTEGER(0, "timeout", &stat_config.timeout,
"stop workload and print counts after a timeout period in ms (>= 10ms)"),
- OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
- "aggregate counts per processor socket", AGGR_SOCKET),
- OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
- "aggregate counts per processor die", AGGR_DIE),
- OPT_SET_UINT(0, "per-cluster", &stat_config.aggr_mode,
- "aggregate counts per processor cluster", AGGR_CLUSTER),
- OPT_CALLBACK_OPTARG(0, "per-cache", &stat_config.aggr_mode, &stat_config.aggr_level,
+ OPT_BOOLEAN(0, "per-socket", &opt_mode.socket,
+ "aggregate counts per processor socket"),
+ OPT_BOOLEAN(0, "per-die", &opt_mode.die, "aggregate counts per processor die"),
+ OPT_BOOLEAN(0, "per-cluster", &opt_mode.cluster,
+ "aggregate counts per processor cluster"),
+ OPT_CALLBACK_OPTARG(0, "per-cache", &opt_mode, &stat_config.aggr_level,
"cache level", "aggregate count at this cache level (Default: LLC)",
parse_cache_level),
- OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
- "aggregate counts per physical processor core", AGGR_CORE),
- OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
- "aggregate counts per thread", AGGR_THREAD),
- OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
- "aggregate counts per numa node", AGGR_NODE),
+ OPT_BOOLEAN(0, "per-core", &opt_mode.core,
+ "aggregate counts per physical processor core"),
+ OPT_BOOLEAN(0, "per-thread", &opt_mode.thread, "aggregate counts per thread"),
+ OPT_BOOLEAN(0, "per-node", &opt_mode.node, "aggregate counts per numa node"),
OPT_INTEGER('D', "delay", &target.initial_delay,
"ms to wait before starting measurement after program start (-1: start with events disabled)"),
OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
@@ -2521,6 +2550,8 @@ int cmd_stat(int argc, const char **argv)
(const char **) stat_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
+ stat_config.aggr_mode = opt_aggr_mode_to_aggr_mode(&opt_mode);
+
if (stat_config.csv_sep) {
stat_config.csv_output = true;
if (!strcmp(stat_config.csv_sep, "\\t"))
@@ -2529,7 +2560,7 @@ int cmd_stat(int argc, const char **argv)
stat_config.csv_sep = DEFAULT_SEPARATOR;
if (argc && strlen(argv[0]) > 2 && strstarts("record", argv[0])) {
- argc = __cmd_record(stat_options, argc, argv);
+ argc = __cmd_record(stat_options, &opt_mode, argc, argv);
if (argc < 0)
return -1;
} else if (argc && strlen(argv[0]) > 2 && strstarts("report", argv[0]))
--
2.45.1.288.g0e0cd299f1-goog
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