perf stat: Implement --topdown using json metrics

Request the topdown metric group of a level with the metrics in the
group 'TopdownL<level>' rather than through specific events. As more
topdown levels are supported this way, such as 6 on Intel Ice Lake,
default to just showing the level 1 metrics. This can be overridden
using '--td-level'. Rather than determine the maximum topdown level
from sysfs, use the metric group names. Remove some now unused topdown
code.

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/20230219092848.639226-41-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 20 insertions, 98 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 796e98e453f6..bdb1ef4fc6ad 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -124,39 +124,6 @@ static const char * transaction_limited_attrs = {
 	"}"
 };
 
-static const char * topdown_attrs[] = {
-	"topdown-total-slots",
-	"topdown-slots-retired",
-	"topdown-recovery-bubbles",
-	"topdown-fetch-bubbles",
-	"topdown-slots-issued",
-	NULL,
-};
-
-static const char *topdown_metric_attrs[] = {
-	"slots",
-	"topdown-retiring",
-	"topdown-bad-spec",
-	"topdown-fe-bound",
-	"topdown-be-bound",
-	NULL,
-};
-
-static const char *topdown_metric_L2_attrs[] = {
-	"slots",
-	"topdown-retiring",
-	"topdown-bad-spec",
-	"topdown-fe-bound",
-	"topdown-be-bound",
-	"topdown-heavy-ops",
-	"topdown-br-mispredict",
-	"topdown-fetch-lat",
-	"topdown-mem-bound",
-	NULL,
-};
-
-#define TOPDOWN_MAX_LEVEL			2
-
 static const char *smi_cost_attrs = {
 	"{"
 	"msr/aperf/,"
@@ -1914,86 +1881,41 @@ static int add_default_attributes(void)
 	}
 
 	if (topdown_run) {
-		const char **metric_attrs = topdown_metric_attrs;
-		unsigned int max_level = 1;
-		char *str = NULL;
-		bool warn = false;
-		const char *pmu_name = arch_get_topdown_pmu_name(evsel_list, true);
+		unsigned int max_level = metricgroups__topdown_max_level();
+		char str[] = "TopdownL1";
 
 		if (!force_metric_only)
 			stat_config.metric_only = true;
 
-		if (pmu_have_event(pmu_name, topdown_metric_L2_attrs[5])) {
-			metric_attrs = topdown_metric_L2_attrs;
-			max_level = 2;
+		if (!max_level) {
+			pr_err("Topdown requested but the topdown metric groups aren't present.\n"
+				"(See perf list the metric groups have names like TopdownL1)");
+			return -1;
 		}
-
 		if (stat_config.topdown_level > max_level) {
 			pr_err("Invalid top-down metrics level. The max level is %u.\n", max_level);
 			return -1;
 		} else if (!stat_config.topdown_level)
-			stat_config.topdown_level = max_level;
+			stat_config.topdown_level = 1;
 
-		if (topdown_filter_events(metric_attrs, &str, 1, pmu_name) < 0) {
-			pr_err("Out of memory\n");
-			return -1;
-		}
-
-		if (metric_attrs[0] && str) {
-			if (!stat_config.interval && !stat_config.metric_only) {
-				fprintf(stat_config.output,
-					"Topdown accuracy may decrease when measuring long periods.\n"
-					"Please print the result regularly, e.g. -I1000\n");
-			}
-			goto setup_metrics;
-		}
-
-		zfree(&str);
-
-		if (stat_config.aggr_mode != AGGR_GLOBAL &&
-		    stat_config.aggr_mode != AGGR_CORE) {
-			pr_err("top down event configuration requires --per-core mode\n");
-			return -1;
-		}
-		stat_config.aggr_mode = AGGR_CORE;
-		if (nr_cgroups || !target__has_cpu(&target)) {
-			pr_err("top down event configuration requires system-wide mode (-a)\n");
-			return -1;
-		}
-
-		if (topdown_filter_events(topdown_attrs, &str,
-				arch_topdown_check_group(&warn),
-				pmu_name) < 0) {
-			pr_err("Out of memory\n");
-			return -1;
+		if (!stat_config.interval && !stat_config.metric_only) {
+			fprintf(stat_config.output,
+				"Topdown accuracy may decrease when measuring long periods.\n"
+				"Please print the result regularly, e.g. -I1000\n");
 		}
-
-		if (topdown_attrs[0] && str) {
-			struct parse_events_error errinfo;
-			if (warn)
-				arch_topdown_group_warn();
-setup_metrics:
-			parse_events_error__init(&errinfo);
-			err = parse_events(evsel_list, str, &errinfo);
-			if (err) {
-				fprintf(stderr,
-					"Cannot set up top down events %s: %d\n",
-					str, err);
-				parse_events_error__print(&errinfo, str);
-				parse_events_error__exit(&errinfo);
-				free(str);
-				return -1;
-			}
-			parse_events_error__exit(&errinfo);
-		} else {
-			fprintf(stderr, "System does not support topdown\n");
+		str[8] = stat_config.topdown_level + '0';
+		if (metricgroup__parse_groups(evsel_list, str,
+						/*metric_no_group=*/false,
+						/*metric_no_merge=*/false,
+						/*metric_no_threshold=*/true,
+						stat_config.user_requested_cpu_list,
+						stat_config.system_wide,
+						&stat_config.metric_events) < 0)
 			return -1;
-		}
-		free(str);
 	}
 
 	if (!stat_config.topdown_level)
-		stat_config.topdown_level = TOPDOWN_MAX_LEVEL;
+		stat_config.topdown_level = 1;
 
 	if (!evsel_list->core.nr_entries) {
 		/* No events so add defaults. */