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perf mem: Support ARM SPE events

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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>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20201106094853.21082-10-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Leo Yan 2020-11-06 17:48:53 +08:00 committed by Arnaldo Carvalho de Melo
parent c825f78851
commit 40714c5863
2 changed files with 38 additions and 1 deletions
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2
tools/perf/arch/arm64/util/Build
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@ -10,4 +10,4 @@ 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

37
tools/perf/arch/arm64/util/mem-events.c Normal file
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@ -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;
}