[PATCH v1 4/9] perf list: Generalize limiting to a PMU name

Ian Rogers
2022-11-14T07:52:51Z

Deprecate the --cputype option and add a --unit option where '--unit
cpu_atom' behaves like '--cputype atom'. The --unit option can be used
with arbitrary PMUs, for example:

```
$ perf list --unit msr pmu

List of pre-defined events (to be used in -e or -M):

msr/aperf/ [Kernel PMU event]
msr/cpu_thermal_margin/ [Kernel PMU event]
msr/mperf/ [Kernel PMU event]
msr/pperf/ [Kernel PMU event]
msr/smi/ [Kernel PMU event]
msr/tsc/ [Kernel PMU event]
```

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/Documentation/perf-list.txt | 6 +++---
tools/perf/builtin-list.c | 18 ++++++++++++------
tools/perf/util/metricgroup.c | 3 ++-
tools/perf/util/pmu.c | 4 +---
4 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 57384a97c04f..44a819af573d 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -39,9 +39,9 @@ any extra expressions computed by perf stat.
--deprecated::
Print deprecated events. By default the deprecated events are hidden.

---cputype::
-Print events applying cpu with this type for hybrid platform
-(e.g. --cputype core or --cputype atom)
+--unit::
+Print PMU events and metrics limited to the specific PMU name.
+(e.g. --unit cpu, --unit msr, --unit cpu_core, --unit cpu_atom)

[[EVENT_MODIFIERS]]
EVENT MODIFIERS
diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index 58e1ec1654ef..cc84ced6da26 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -21,7 +21,6 @@

static bool desc_flag = true;
static bool details_flag;
-static const char *hybrid_type;

int cmd_list(int argc, const char **argv)
{
@@ -30,6 +29,8 @@ int cmd_list(int argc, const char **argv)
bool long_desc_flag = false;
bool deprecated = false;
char *pmu_name = NULL;
+ const char *hybrid_name = NULL;
+ const char *unit_name = NULL;
struct option list_options[] = {
OPT_BOOLEAN(0, "raw-dump", &raw_dump, "Dump raw events"),
OPT_BOOLEAN('d', "desc", &desc_flag,
@@ -40,9 +41,10 @@ int cmd_list(int argc, const char **argv)
"Print information on the perf event names and expressions used internally by events."),
OPT_BOOLEAN(0, "deprecated", &deprecated,
"Print deprecated events."),
- OPT_STRING(0, "cputype", &hybrid_type, "hybrid cpu type",
- "Print events applying cpu with this type for hybrid platform "
- "(e.g. core or atom)"),
+ OPT_STRING(0, "cputype", &hybrid_name, "hybrid cpu type",
+ "Limit PMU or metric printing to the given hybrid PMU (e.g. core or atom)."),
+ OPT_STRING(0, "unit", &unit_name, "PMU name",
+ "Limit PMU or metric printing to the specified PMU."),
OPT_INCR(0, "debug", &verbose,
"Enable debugging output"),
OPT_END()
@@ -53,6 +55,8 @@ int cmd_list(int argc, const char **argv)
};

set_option_flag(list_options, 0, "raw-dump", PARSE_OPT_HIDDEN);
+ /* Hide hybrid flag for the more generic 'unit' flag. */
+ set_option_flag(list_options, 0, "cputype", PARSE_OPT_HIDDEN);

argc = parse_options(argc, argv, list_options, list_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
@@ -62,8 +66,10 @@ int cmd_list(int argc, const char **argv)
if (!raw_dump && pager_in_use())
printf("\nList of pre-defined events (to be used in -e or -M):\n\n");

- if (hybrid_type) {
- pmu_name = perf_pmu__hybrid_type_to_pmu(hybrid_type);
+ if (unit_name)
+ pmu_name = strdup(unit_name);
+ else if (hybrid_name) {
+ pmu_name = perf_pmu__hybrid_type_to_pmu(hybrid_name);
if (!pmu_name)
pr_warning("WARNING: hybrid cputype is not supported!\n");
}
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 4c98ac29ee13..1943fed9b6d9 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -556,11 +556,12 @@ static int metricgroup__print_callback(const struct pmu_event *pe,
void *vdata)
{
struct metricgroup_print_data *data = vdata;
+ const char *pmu = pe->pmu ?: "cpu";

if (!pe->metric_expr)
return 0;

- if (data->pmu_name && perf_pmu__is_hybrid(pe->pmu) && strcmp(data->pmu_name, pe->pmu))
+ if (data->pmu_name && strcmp(data->pmu_name, pmu))
return 0;

return metricgroup__print_pmu_event(pe, data->metricgroups, data->filter,
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index a8f9f47c6ed9..9c771f136b81 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1694,10 +1694,8 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
pmu = NULL;
j = 0;
while ((pmu = perf_pmu__scan(pmu)) != NULL) {
- if (pmu_name && perf_pmu__is_hybrid(pmu->name) &&
- strcmp(pmu_name, pmu->name)) {
+ if (pmu_name && pmu->name && strcmp(pmu_name, pmu->name))
continue;
- }

list_for_each_entry(alias, &pmu->aliases, list) {
char *name = alias->desc ? alias->name :
--
2.38.1.431.g37b22c650d-goog