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SubjectRe: [PATCH v2] perf annotate: Add itrace options support
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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@huawei.com>
>> ---
>>
>> 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
>>
>

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