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Date: Sun, 19 Feb 2023 01:28:05 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
Sandipan Das <sandipan.das@....com>,
James Clark <james.clark@....com>,
Kajol Jain <kjain@...ux.ibm.com>,
John Garry <john.g.garry@...cle.com>,
Kan Liang <kan.liang@...ux.intel.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Andrii Nakryiko <andrii@...nel.org>,
Eduard Zingerman <eddyz87@...il.com>,
Suzuki Poulouse <suzuki.poulose@....com>,
Leo Yan <leo.yan@...aro.org>,
Florian Fischer <florian.fischer@...q.space>,
Ravi Bangoria <ravi.bangoria@....com>,
Jing Zhang <renyu.zj@...ux.alibaba.com>,
Sean Christopherson <seanjc@...gle.com>,
Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org,
Perry Taylor <perry.taylor@...el.com>,
Caleb Biggers <caleb.biggers@...el.com>
Cc: Stephane Eranian <eranian@...gle.com>,
Ian Rogers <irogers@...gle.com>
Subject: [PATCH v1 08/51] perf pmu-events: Make the metric_constraint an enum
Rename metric_constraint to event_grouping to better explain what the
variable is used for. Switch to use an enum for encoding instead of a
string. Rather than just no constraint/grouping information or
"NO_NMI_WATCHDOG", have 4 enum values. The values encode whether to
group or not, and two cases where the behavior is dependent on either
the NMI watchdog being enabled or SMT being enabled.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/pmu-events/jevents.py | 20 ++++++++++++++++----
tools/perf/pmu-events/pmu-events.h | 25 ++++++++++++++++++++++++-
tools/perf/util/metricgroup.c | 19 ++++++++++++-------
3 files changed, 52 insertions(+), 12 deletions(-)
diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index 2da55408398f..dc0c56dccb5e 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -51,8 +51,8 @@ _json_event_attributes = [
# Attributes that are in pmu_metric rather than pmu_event.
_json_metric_attributes = [
- 'metric_name', 'metric_group', 'metric_constraint', 'metric_expr', 'desc',
- 'long_desc', 'unit', 'compat', 'aggr_mode'
+ 'metric_name', 'metric_group', 'metric_expr', 'desc',
+ 'long_desc', 'unit', 'compat', 'aggr_mode', 'event_grouping'
]
def removesuffix(s: str, suffix: str) -> str:
@@ -204,6 +204,18 @@ class JsonEvent:
}
return aggr_mode_to_enum[aggr_mode]
+ def convert_metric_constraint(metric_constraint: str) -> Optional[str]:
+ """Returns the metric_event_groups enum value associated with the JSON string."""
+ if not metric_constraint:
+ return None
+ metric_constraint_to_enum = {
+ 'NO_GROUP_EVENTS': '1',
+ 'NO_GROUP_EVENTS_NMI': '2',
+ 'NO_NMI_WATCHDOG': '2',
+ 'NO_GROUP_EVENTS_SMT': '3',
+ }
+ return metric_constraint_to_enum[metric_constraint]
+
def lookup_msr(num: str) -> Optional[str]:
"""Converts the msr number, or first in a list to the appropriate event field."""
if not num:
@@ -288,7 +300,7 @@ class JsonEvent:
self.deprecated = jd.get('Deprecated')
self.metric_name = jd.get('MetricName')
self.metric_group = jd.get('MetricGroup')
- self.metric_constraint = jd.get('MetricConstraint')
+ self.event_grouping = convert_metric_constraint(jd.get('MetricConstraint'))
self.metric_expr = None
if 'MetricExpr' in jd:
self.metric_expr = metric.ParsePerfJson(jd['MetricExpr']).Simplify()
@@ -678,7 +690,7 @@ static void decompress_event(int offset, struct pmu_event *pe)
{
\tconst char *p = &big_c_string[offset];
""")
- enum_attributes = ['aggr_mode', 'deprecated', 'perpkg']
+ enum_attributes = ['aggr_mode', 'deprecated', 'event_grouping', 'perpkg']
for attr in _json_event_attributes:
_args.output_file.write(f'\n\tpe->{attr} = ')
if attr in enum_attributes:
diff --git a/tools/perf/pmu-events/pmu-events.h b/tools/perf/pmu-events/pmu-events.h
index 4d236bb32fd3..57a38e3e5c32 100644
--- a/tools/perf/pmu-events/pmu-events.h
+++ b/tools/perf/pmu-events/pmu-events.h
@@ -11,6 +11,29 @@ enum aggr_mode_class {
PerCore
};
+/**
+ * enum metric_event_groups - How events within a pmu_metric should be grouped.
+ */
+enum metric_event_groups {
+ /**
+ * @MetricGroupEvents: Default, group events within the metric.
+ */
+ MetricGroupEvents = 0,
+ /**
+ * @MetricNoGroupEvents: Don't group events for the metric.
+ */
+ MetricNoGroupEvents = 1,
+ /**
+ * @MetricNoGroupEventsNmi: Don't group events for the metric if the NMI
+ * watchdog is enabled.
+ */
+ MetricNoGroupEventsNmi = 2,
+ /**
+ * @MetricNoGroupEventsSmt: Don't group events for the metric if SMT is
+ * enabled.
+ */
+ MetricNoGroupEventsSmt = 3,
+};
/*
* Describe each PMU event. Each CPU has a table of PMU events.
*/
@@ -33,10 +56,10 @@ struct pmu_metric {
const char *metric_expr;
const char *unit;
const char *compat;
- const char *metric_constraint;
const char *desc;
const char *long_desc;
enum aggr_mode_class aggr_mode;
+ enum metric_event_groups event_grouping;
};
struct pmu_events_table;
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index b2aa6e049804..868fc9c35606 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -13,6 +13,7 @@
#include "pmu.h"
#include "pmu-hybrid.h"
#include "print-events.h"
+#include "smt.h"
#include "expr.h"
#include "rblist.h"
#include <string.h>
@@ -168,16 +169,20 @@ static void metric__watchdog_constraint_hint(const char *name, bool foot)
static bool metric__group_events(const struct pmu_metric *pm)
{
- if (!pm->metric_constraint)
- return true;
-
- if (!strcmp(pm->metric_constraint, "NO_NMI_WATCHDOG") &&
- sysctl__nmi_watchdog_enabled()) {
+ switch (pm->event_grouping) {
+ case MetricNoGroupEvents:
+ return false;
+ case MetricNoGroupEventsNmi:
+ if (!sysctl__nmi_watchdog_enabled())
+ return true;
metric__watchdog_constraint_hint(pm->metric_name, /*foot=*/false);
return false;
+ case MetricNoGroupEventsSmt:
+ return !smt_on();
+ case MetricGroupEvents:
+ default:
+ return true;
}
-
- return true;
}
static void metric__free(struct metric *m)
--
2.39.2.637.g21b0678d19-goog
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