linux-kernel - [PATCH v4 20/35] perf evsel: Compute is

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Date:   Fri, 26 May 2023 14:53:55 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        John Garry <john.g.garry@...cle.com>,
        Will Deacon <will@...nel.org>,
        James Clark <james.clark@....com>,
        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>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Jing Zhang <renyu.zj@...ux.alibaba.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Madhavan Srinivasan <maddy@...ux.ibm.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        Ming Wang <wangming01@...ngson.cn>,
        Huacai Chen <chenhuacai@...nel.org>,
        Sandipan Das <sandipan.das@....com>,
        Dmitrii Dolgov <9erthalion6@...il.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Ali Saidi <alisaidi@...zon.com>, Rob Herring <robh@...nel.org>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Kang Minchul <tegongkang@...il.com>,
        linux-kernel@...r.kernel.org, coresight@...ts.linaro.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org
Subject: [PATCH v4 20/35] perf evsel: Compute is_hybrid from PMU being core

Short-cut when has_hybrid is false, otherwise return if the evsel's
PMU is core. Add a comment for the some what surprising no PMU cases
of hardware and legacy cache events.

Signed-off-by: Ian Rogers <irogers@...gle.com>
Reviewed-by: Kan Liang <kan.liang@...ux.intel.com>
---
 tools/perf/util/evsel.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 1df8f967d2eb..1c6e22e3f345 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -46,8 +46,8 @@
 #include "memswap.h"
 #include "util.h"
 #include "util/hashmap.h"
-#include "pmu-hybrid.h"
 #include "off_cpu.h"
+#include "pmu.h"
 #include "../perf-sys.h"
 #include "util/parse-branch-options.h"
 #include "util/bpf-filter.h"
@@ -3132,9 +3132,17 @@ void evsel__zero_per_pkg(struct evsel *evsel)
 	}
 }
 
+/**
+ * evsel__is_hybrid - does the evsel have a known PMU that is hybrid. Note, this
+ *                    will be false on hybrid systems for hardware and legacy
+ *                    cache events.
+ */
 bool evsel__is_hybrid(const struct evsel *evsel)
 {
-	return evsel->pmu_name && perf_pmu__is_hybrid(evsel->pmu_name);
+	if (!perf_pmu__has_hybrid())
+		return false;
+
+	return evsel->core.is_pmu_core;
 }
 
 struct evsel *evsel__leader(const struct evsel *evsel)
-- 
2.41.0.rc0.172.g3f132b7071-goog