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Subject[PATCH 2/5] perf evsel: Add arch_evsel__hw_name()
Date
From: Kan Liang <kan.liang@linux.intel.com>

The commit 55bcf6ef314a ("perf: Extend PERF_TYPE_HARDWARE and
PERF_TYPE_HW_CACHE") extends the two types to become PMU aware types for
a hybrid system. However, current evsel__hw_name doesn't take the PMU
type into account. It mistakenly returns the "unknown-hardware" for the
hardware event with a specific PMU type.

Add an Arch specific arch_evsel__hw_name() to specially handle the PMU
aware hardware event.

Currently, the extend PERF_TYPE_HARDWARE and PERF_TYPE_HW_CACHE is only
supported by X86. Only implement the specific arch_evsel__hw_name() for
X86 in the patch.

Nothing is changed for the other Archs.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Zhengjun Xing <zhengjun.xing@linux.intel.com>
---
tools/perf/arch/x86/util/evsel.c | 20 ++++++++++++++++++++
tools/perf/util/evsel.c | 7 ++++++-
tools/perf/util/evsel.h | 1 +
3 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/tools/perf/arch/x86/util/evsel.c b/tools/perf/arch/x86/util/evsel.c
index 3501399cef35..f6feb61d98a0 100644
--- a/tools/perf/arch/x86/util/evsel.c
+++ b/tools/perf/arch/x86/util/evsel.c
@@ -61,3 +61,23 @@ bool arch_evsel__must_be_in_group(const struct evsel *evsel)
(strcasestr(evsel->name, "slots") ||
strcasestr(evsel->name, "topdown"));
}
+
+int arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
+{
+ u64 event = evsel->core.attr.config & PERF_HW_EVENT_MASK;
+ u64 pmu = evsel->core.attr.config >> PERF_PMU_TYPE_SHIFT;
+ const char *event_name;
+
+ if (event < PERF_COUNT_HW_MAX && evsel__hw_names[event])
+ event_name = evsel__hw_names[event];
+ else
+ event_name = "unknown-hardware";
+
+ /* The PMU type is not required for the non-hybrid platform. */
+ if (!pmu)
+ return scnprintf(bf, size, "%s", event_name);
+
+ return scnprintf(bf, size, "%s/%s/",
+ evsel->pmu_name ? evsel->pmu_name : "cpu",
+ event_name);
+}
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index ce499c5da8d7..782be377208f 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -593,9 +593,14 @@ static int evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size)
return r;
}

+int __weak arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
+{
+ return scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
+}
+
static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
{
- int r = scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
+ int r = arch_evsel__hw_name(evsel, bf, size);
return r + evsel__add_modifiers(evsel, bf + r, size - r);
}

diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 73ea48e94079..8dd3f04a5bdb 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -271,6 +271,7 @@ extern const char *const evsel__hw_names[PERF_COUNT_HW_MAX];
extern const char *const evsel__sw_names[PERF_COUNT_SW_MAX];
extern char *evsel__bpf_counter_events;
bool evsel__match_bpf_counter_events(const char *name);
+int arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size);

int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size);
const char *evsel__name(struct evsel *evsel);
--
2.25.1
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