openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

perf mem: Support AUX trace 

The 'perf mem' tool doesn't support AUX trace data so it cannot receive
the hardware tracing data.

On arm64, although it doesn't support PMU events for memory load and
store, ARM SPE is a good candidate for memory profiling, the hardware
tracer can record memory accessing operations with affiliated
information (e.g. physical address and virtual address for accessing,
cache levels, TLB walking, latency, etc).

To allow "perf mem" tool to support AUX trace, this patch adds the AUX
callbacks for session structure; make itrace memory event as default for
"perf mem", this tells the AUX trace decoder to synthesize memory
samples.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20201106094853.21082-8-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Leo Yan 2020-11-06 17:48:51 +08:00 committed by Arnaldo Carvalho de Melo
parent 014a771c78
commit 13e5df1e3f
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
tools/perf/builtin-mem.c
View File

@ -7,6 +7,7 @@
#include "perf.h"
#include <subcmd/parse-options.h>
#include "util/auxtrace.h"
#include "util/trace-event.h"
#include "util/tool.h"
#include "util/session.h"
@ -255,6 +256,12 @@ static int process_sample_event(struct perf_tool *tool,
static int report_raw_events(struct perf_mem *mem)
{
struct itrace_synth_opts itrace_synth_opts = {
.set = true,
.mem = true, /* Only enable memory event */
.default_no_sample = true,
};
struct perf_data data = {
.path = input_name,
.mode = PERF_DATA_MODE_READ,
@ -267,6 +274,8 @@ static int report_raw_events(struct perf_mem *mem)
if (IS_ERR(session))
return PTR_ERR(session);
session->itrace_synth_opts = &itrace_synth_opts;
if (mem->cpu_list) {
ret = perf_session__cpu_bitmap(session, mem->cpu_list,
mem->cpu_bitmap);
@ -410,8 +419,12 @@ int cmd_mem(int argc, const char **argv)
.comm = perf_event__process_comm,
.lost = perf_event__process_lost,
.fork = perf_event__process_fork,
.attr = perf_event__process_attr,
.build_id = perf_event__process_build_id,
.namespaces = perf_event__process_namespaces,
.auxtrace_info = perf_event__process_auxtrace_info,
.auxtrace = perf_event__process_auxtrace,
.auxtrace_error = perf_event__process_auxtrace_error,
.ordered_events = true,
},
.input_name = "perf.data",