perf stat: Use metrics for --smi-cost

Rather than parsing events for --smi-cost, use the json metric group
'smi'.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Link: https://lore.kernel.org/r/20230219092848.639226-45-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-stat.c

@@ -100,14 +100,6 @@
 
 static void print_counters(struct timespec *ts, int argc, const char **argv);
 
-static const char *smi_cost_attrs = {
-	"{"
-	"msr/aperf/,"
-	"msr/smi/,"
-	"cycles"
-	"}"
-};
-
 static struct evlist	*evsel_list;
 static bool all_counters_use_bpf = true;
 
@@ -1666,7 +1658,6 @@ static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
  */
 static int add_default_attributes(void)
 {
-	int err;
 	struct perf_event_attr default_attrs0[] = {
 
   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK		},
@@ -1806,11 +1797,10 @@ static int add_default_attributes(void)
 	}
 
 	if (smi_cost) {
-		struct parse_events_error errinfo;
 		int smi;
 
 		if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
-			fprintf(stderr, "freeze_on_smi is not supported.\n");
+			pr_err("freeze_on_smi is not supported.");
 			return -1;
 		}
 
@@ -1822,23 +1812,21 @@ static int add_default_attributes(void)
 			smi_reset = true;
 		}
 
-		if (!pmu_have_event("msr", "aperf") ||
+		if (!metricgroup__has_metric("smi")) {
-		    !pmu_have_event("msr", "smi")) {
+			pr_err("Missing smi metrics");
-			fprintf(stderr, "To measure SMI cost, it needs "
-				"msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
 			return -1;
 		}
+
 		if (!force_metric_only)
 			stat_config.metric_only = true;
 
-		parse_events_error__init(&errinfo);
+		return metricgroup__parse_groups(evsel_list, "smi",
-		err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
+						stat_config.metric_no_group,
-		if (err) {
+						stat_config.metric_no_merge,
-			parse_events_error__print(&errinfo, smi_cost_attrs);
+						stat_config.metric_no_threshold,
-			fprintf(stderr, "Cannot set up SMI cost events\n");
+						stat_config.user_requested_cpu_list,
-		}
+						stat_config.system_wide,
-		parse_events_error__exit(&errinfo);
+						&stat_config.metric_events);
-		return err ? -1 : 0;
 	}
 
 	if (topdown_run) {

tools/perf/util/stat-shadow.c

@@ -255,10 +255,6 @@ void perf_stat__update_shadow_stats(struct evsel *counter, u64 count,
 		update_runtime_stat(st, STAT_DTLB_CACHE, map_idx, count, &rsd);
 	else if (evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 		update_runtime_stat(st, STAT_ITLB_CACHE, map_idx, count, &rsd);
-	else if (perf_stat_evsel__is(counter, SMI_NUM))
-		update_runtime_stat(st, STAT_SMI_NUM, map_idx, count, &rsd);
-	else if (perf_stat_evsel__is(counter, APERF))
-		update_runtime_stat(st, STAT_APERF, map_idx, count, &rsd);
 
 	if (counter->collect_stat) {
 		v = saved_value_lookup(counter, map_idx, true, STAT_NONE, 0, st,
@@ -479,30 +475,6 @@ static void print_ll_cache_misses(struct perf_stat_config *config,
 	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all LL-cache accesses", ratio);
 }
 
-static void print_smi_cost(struct perf_stat_config *config, int map_idx,
-			   struct perf_stat_output_ctx *out,
-			   struct runtime_stat *st,
-			   struct runtime_stat_data *rsd)
-{
-	double smi_num, aperf, cycles, cost = 0.0;
-	const char *color = NULL;
-
-	smi_num = runtime_stat_avg(st, STAT_SMI_NUM, map_idx, rsd);
-	aperf = runtime_stat_avg(st, STAT_APERF, map_idx, rsd);
-	cycles = runtime_stat_avg(st, STAT_CYCLES, map_idx, rsd);
-
-	if ((cycles == 0) || (aperf == 0))
-		return;
-
-	if (smi_num)
-		cost = (aperf - cycles) / aperf * 100.00;
-
-	if (cost > 10)
-		color = PERF_COLOR_RED;
-	out->print_metric(config, out->ctx, color, "%8.1f%%", "SMI cycles%", cost);
-	out->print_metric(config, out->ctx, NULL, "%4.0f", "SMI#", smi_num);
-}
-
 static int prepare_metric(struct evsel **metric_events,
 			  struct metric_ref *metric_refs,
 			  struct expr_parse_ctx *pctx,
@@ -819,8 +791,6 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
 		if (unit != ' ')
 			snprintf(unit_buf, sizeof(unit_buf), "%c/sec", unit);
 		print_metric(config, ctxp, NULL, "%8.3f", unit_buf, ratio);
-	} else if (perf_stat_evsel__is(evsel, SMI_NUM)) {
-		print_smi_cost(config, map_idx, out, st, &rsd);
 	} else {
 		num = 0;
 	}

tools/perf/util/stat.c

@@ -87,8 +87,6 @@ bool __perf_stat_evsel__is(struct evsel *evsel, enum perf_stat_evsel_id id)
 #define ID(id, name) [PERF_STAT_EVSEL_ID__##id] = #name
 static const char *id_str[PERF_STAT_EVSEL_ID__MAX] = {
 	ID(NONE,		x),
-	ID(SMI_NUM, msr/smi/),
-	ID(APERF, msr/aperf/),
 };
 #undef ID
 

tools/perf/util/stat.h

@@ -21,8 +21,6 @@ struct stats {
 
 enum perf_stat_evsel_id {
 	PERF_STAT_EVSEL_ID__NONE = 0,
-	PERF_STAT_EVSEL_ID__SMI_NUM,
-	PERF_STAT_EVSEL_ID__APERF,
 	PERF_STAT_EVSEL_ID__MAX,
 };
 
@@ -88,8 +86,6 @@ enum stat_type {
 	STAT_LL_CACHE,
 	STAT_ITLB_CACHE,
 	STAT_DTLB_CACHE,
-	STAT_SMI_NUM,
-	STAT_APERF,
 	STAT_MAX
 };