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perf auxtrace: Add auxtrace_synth_id_range_start() helper

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To avoid hardcoding the offset value for synthetic event IDs
in multiple auxtrace modules (arm-spe, cs-etm, intel-pt, etc.),
and to improve code reusability, this patch unifies
the handling of the ID offset via a dedicated helper function.

Signed-off-by: tanze <tanze@kylinos.cn>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
tanze 2025-10-24 16:56:25 +08:00 committed by Namhyung Kim
parent be806f06ad
commit ab29ff9f6f
7 changed files with 22 additions and 17 deletions
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5
tools/perf/util/arm-spe.c
View File

@ -1733,10 +1733,7 @@ arm_spe_synth_events(struct arm_spe *spe, struct perf_session *session)
attr.sample_period = spe->synth_opts.period;
/* create new id val to be a fixed offset from evsel id */
id = evsel->core.id[0] + 1000000000;
if (!id)
id = 1;
id = auxtrace_synth_id_range_start(evsel);
if (spe->synth_opts.flc) {
spe->sample_flc = true;

16
tools/perf/util/auxtrace.c
View File

@ -62,6 +62,22 @@
#include <internal/lib.h>
#include "util/sample.h"
#define AUXTRACE_SYNTH_EVENT_ID_OFFSET 1000000000ULL
/*
* Event IDs are allocated sequentially, so a big offset from any
* existing ID will reach a unused range.
*/
u64 auxtrace_synth_id_range_start(struct evsel *evsel)
{
u64 id = evsel->core.id[0] + AUXTRACE_SYNTH_EVENT_ID_OFFSET;
if (!id)
id = 1;
return id;
}
/*
* Make a group from 'leader' to 'last', requiring that the events were not
* already grouped to a different leader.

1
tools/perf/util/auxtrace.h
View File

@ -648,6 +648,7 @@ void auxtrace__free_events(struct perf_session *session);
void auxtrace__free(struct perf_session *session);
bool auxtrace__evsel_is_auxtrace(struct perf_session *session,
struct evsel *evsel);
u64 auxtrace_synth_id_range_start(struct evsel *evsel);
#define ITRACE_HELP \
" i[period]: synthesize instructions events\n" \

5
tools/perf/util/cs-etm.c
View File

@ -1726,10 +1726,7 @@ static int cs_etm__synth_events(struct cs_etm_auxtrace *etm,
attr.read_format = evsel->core.attr.read_format;
/* create new id val to be a fixed offset from evsel id */
id = evsel->core.id[0] + 1000000000;
if (!id)
id = 1;
id = auxtrace_synth_id_range_start(evsel);
if (etm->synth_opts.branches) {
attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;

4
tools/perf/util/intel-bts.c
View File

@ -777,9 +777,7 @@ static int intel_bts_synth_events(struct intel_bts *bts,
attr.sample_id_all = evsel->core.attr.sample_id_all;
attr.read_format = evsel->core.attr.read_format;
id = evsel->core.id[0] + 1000000000;
if (!id)
id = 1;
id = auxtrace_synth_id_range_start(evsel);
if (bts->synth_opts.branches) {
attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;

4
tools/perf/util/intel-pt.c
View File

@ -3987,9 +3987,7 @@ static int intel_pt_synth_events(struct intel_pt *pt,
attr.sample_id_all = evsel->core.attr.sample_id_all;
attr.read_format = evsel->core.attr.read_format;
id = evsel->core.id[0] + 1000000000;
if (!id)
id = 1;
id = auxtrace_synth_id_range_start(evsel);
if (pt->synth_opts.branches) {
attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;

4
tools/perf/util/powerpc-vpadtl.c
View File

@ -656,9 +656,7 @@ powerpc_vpadtl_synth_events(struct powerpc_vpadtl *vpa, struct perf_session *ses
attr.config = PERF_SYNTH_POWERPC_VPA_DTL;
/* create new id val to be a fixed offset from evsel id */
id = evsel->core.id[0] + 1000000000;
if (!id)
id = 1;
id = auxtrace_synth_id_range_start(evsel);
err = perf_session__deliver_synth_attr_event(session, &attr, id);
if (err)