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perf mem: Introduce weak function perf_mem_events__ptr()

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Different architectures might use different event or different event
parameters for memory profiling, this patch introduces a weak
perf_mem_events__ptr() function which allows to return back a
architecture specific memory event.

Since the variable 'perf_mem_events' can be only accessed by the
perf_mem_events__ptr() function, mark the variable as 'static', this
allows the architectures to define its own memory event array.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20201106094853.21082-3-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Leo Yan 2020-11-06 17:48:46 +08:00 • committed by Arnaldo Carvalho de Melo
parent f9f16dfbe7
commit eaf6aaeec5
4 changed files with 46 additions and 21 deletions
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21
tools/perf/builtin-mem.c
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@ -64,6 +64,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
const char **rec_argv;
int ret;
bool all_user = false, all_kernel = false;
struct perf_mem_event *e;
struct option options[] = {
OPT_CALLBACK('e', "event", &mem, "event",
"event selector. use 'perf mem record -e list' to list available events",
@ -86,13 +87,18 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
rec_argv[i++] = "record";
if (mem->operation & MEM_OPERATION_LOAD)
perf_mem_events[PERF_MEM_EVENTS__LOAD].record = true;
if (mem->operation & MEM_OPERATION_LOAD) {
e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD);
e->record = true;
}
if (mem->operation & MEM_OPERATION_STORE)
perf_mem_events[PERF_MEM_EVENTS__STORE].record = true;
if (mem->operation & MEM_OPERATION_STORE) {
e = perf_mem_events__ptr(PERF_MEM_EVENTS__STORE);
e->record = true;
}
if (perf_mem_events[PERF_MEM_EVENTS__LOAD].record)
e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD);
if (e->record)
rec_argv[i++] = "-W";
rec_argv[i++] = "-d";
@ -101,10 +107,11 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
rec_argv[i++] = "--phys-data";
for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
if (!perf_mem_events[j].record)
e = perf_mem_events__ptr(j);
if (!e->record)
continue;
if (!perf_mem_events[j].supported) {
if (!e->supported) {
pr_err("failed: event '%s' not supported\n",
perf_mem_events__name(j));
free(rec_argv);