iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

perf record: Always record id index

Browse Source 
In preparation for recording sideband events in a virtual machine guest so
that they can be injected into a host perf.data file.

Adjust the logic so that if there are IDs then the id index is recorded.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20220610113316.6682-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2022-06-10 14:33:13 +03:00 committed by Arnaldo Carvalho de Melo
parent f42c0ce573
commit 6b080312fc
2 changed files with 10 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
tools/perf/builtin-record.c
View File

@ -1834,13 +1834,11 @@ static int record__synthesize(struct record *rec, bool tail)
goto out;
/* Synthesize id_index before auxtrace_info */
if (rec->opts.auxtrace_sample_mode || rec->opts.full_auxtrace) {
err = perf_event__synthesize_id_index(tool,
process_synthesized_event,
session->evlist, machine);
if (err)
goto out;
}
err = perf_event__synthesize_id_index(tool,
process_synthesized_event,
session->evlist, machine);
if (err)
goto out;
if (rec->opts.full_auxtrace) {
err = perf_event__synthesize_auxtrace_info(rec->itr, tool,

7
tools/perf/util/synthetic-events.c
View File

@ -1719,14 +1719,17 @@ int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_
size_t nr = 0, i = 0, sz, max_nr, n;
int err;
pr_debug2("Synthesizing id index\n");
max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) /
sizeof(struct id_index_entry);
evlist__for_each_entry(evlist, evsel)
nr += evsel->core.ids;
if (!nr)
return 0;
pr_debug2("Synthesizing id index\n");
n = nr > max_nr ? max_nr : nr;
sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry);
ev = zalloc(sz);