[PATCH v3 7/9] perf mem: Support Arm SPE events

Leo Yan
2020-10-28T06:41:12Z

This patch adds Arm SPE events for perf memory profiling:

'spe-load': event for only recording memory load ops;
'spe-store': event for only recording memory store ops;
'spe-ldst': event for recording memory load and store ops.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
tools/perf/arch/arm64/util/Build | 2 +-
tools/perf/arch/arm64/util/mem-events.c | 37 +++++++++++++++++++++++++
2 files changed, 38 insertions(+), 1 deletion(-)
create mode 100644 tools/perf/arch/arm64/util/mem-events.c

diff --git a/tools/perf/arch/arm64/util/Build b/tools/perf/arch/arm64/util/Build
index b53294d74b01..cf6d7e799f33 100644
--- a/tools/perf/arch/arm64/util/Build
+++ b/tools/perf/arch/arm64/util/Build
@@ -9,4 +9,4 @@ perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
perf-$(CONFIG_AUXTRACE) += ../../arm/util/pmu.o \
../../arm/util/auxtrace.o \
../../arm/util/cs-etm.o \
- arm-spe.o
+ arm-spe.o mem-events.o
diff --git a/tools/perf/arch/arm64/util/mem-events.c b/tools/perf/arch/arm64/util/mem-events.c
new file mode 100644
index 000000000000..2a2497372671
--- /dev/null
+++ b/tools/perf/arch/arm64/util/mem-events.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "map_symbol.h"
+#include "mem-events.h"
+
+#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
+
+static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
+ E("spe-load", "arm_spe_0/ts_enable=1,load_filter=1,store_filter=0,min_latency=%u/", "arm_spe_0"),
+ E("spe-store", "arm_spe_0/ts_enable=1,load_filter=0,store_filter=1/", "arm_spe_0"),
+ E("spe-ldst", "arm_spe_0/ts_enable=1,load_filter=1,store_filter=1,min_latency=%u/", "arm_spe_0"),
+};
+
+static char mem_ev_name[100];
+
+struct perf_mem_event *perf_mem_events__ptr(int i)
+{
+ if (i >= PERF_MEM_EVENTS__MAX)
+ return NULL;
+
+ return &perf_mem_events[i];
+}
+
+char *perf_mem_events__name(int i)
+{
+ struct perf_mem_event *e = perf_mem_events__ptr(i);
+
+ if (i >= PERF_MEM_EVENTS__MAX)
+ return NULL;
+
+ if (i == PERF_MEM_EVENTS__LOAD || i == PERF_MEM_EVENTS__LOAD_STORE)
+ scnprintf(mem_ev_name, sizeof(mem_ev_name),
+ e->name, perf_mem_events__loads_ldlat);
+ else /* PERF_MEM_EVENTS__STORE */
+ scnprintf(mem_ev_name, sizeof(mem_ev_name), e->name);
+
+ return mem_ev_name;
+}