[PATCH v4 7/9] perf mem: Support AUX trace
From: Leo Yan <hidden>
Date: 2020-11-06 09:50:04
Also in:
lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
Perf memory 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, but 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 <redacted> --- tools/perf/builtin-mem.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 72ce4b8fbb0f..fdfbff7592f4 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c@@ -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",
--
2.17.1
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