Re: [PATCH v2] perf annotate: Add itrace options support

From: Yang Jihong
Date: Mon Jun 14 2021 - 23:18:12 EST


Hell Arnaldo,

On 2021/6/11 23:52, Arnaldo Carvalho de Melo wrote:
Em Mon, Jun 07, 2021 at 10:59:18AM +0800, Yang Jihong escreveu:
The "auxtrace_info" and "auxtrace" functions are not set in "tool" member of
"annotate". As a result, perf annotate does not support parsing itrace data.

A simple example is as follows:

# perf record -e arm_spe_0/branch_filter=1/ -a sleep 1
[ perf record: Woken up 9 times to write data ]
[ perf record: Captured and wrote 20.874 MB perf.data ]
# perf annotate --stdio
Error:
The perf.data data has no samples!

Solution:
1.Add itrace options in help,
2.Set hook functions of "auxtrace_info" and "auxtrace" in perf_tool.

So, while we wait for someone to ack/review this, please send a v2
updating tools/perf/Documentation/perf-annotate.txt to have references
to these new 'perf annotate' options.

It all looks ok, so if nobody chimes in, I'll process v2 on my own.

OK, I have submitted the v3 patch, which updates tools/perf/Documentation/perf-annotate.txt:
https://lore.kernel.org/patchwork/patch/1446618/

Please take time to review the new patch. :)

Thanks,
Yang

Thanks,

- Arnaldo
Signed-off-by: Yang Jihong <yangjihong1@xxxxxxxxxx>
---

Changes since v1:
- Adjust spaces to maintain alignment in "tool".

tools/perf/builtin-annotate.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 49627a7bed7c..8f87658eff31 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -474,6 +474,8 @@ int cmd_annotate(int argc, const char **argv)
.attr = perf_event__process_attr,
.build_id = perf_event__process_build_id,
.tracing_data = perf_event__process_tracing_data,
+ .auxtrace_info = perf_event__process_auxtrace_info,
+ .auxtrace = perf_event__process_auxtrace,
.feature = process_feature_event,
.ordered_events = true,
.ordering_requires_timestamps = true,
@@ -483,6 +485,9 @@ int cmd_annotate(int argc, const char **argv)
struct perf_data data = {
.mode = PERF_DATA_MODE_READ,
};
+ struct itrace_synth_opts itrace_synth_opts = {
+ .set = 0,
+ };
struct option options[] = {
OPT_STRING('i', "input", &input_name, "file",
"input file name"),
@@ -547,6 +552,9 @@ int cmd_annotate(int argc, const char **argv)
OPT_CALLBACK(0, "percent-type", &annotate.opts, "local-period",
"Set percent type local/global-period/hits",
annotate_parse_percent_type),
+ OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
+ "Instruction Tracing options\n" ITRACE_HELP,
+ itrace_parse_synth_opts),
OPT_END()
};
@@ -591,6 +599,8 @@ int cmd_annotate(int argc, const char **argv)
if (IS_ERR(annotate.session))
return PTR_ERR(annotate.session);
+ annotate.session->itrace_synth_opts = &itrace_synth_opts;
+
annotate.has_br_stack = perf_header__has_feat(&annotate.session->header,
HEADER_BRANCH_STACK);
--
2.30.GIT