From 6b080312fc821658a479e74bdb0c3f7d9ac5838f Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Fri, 10 Jun 2022 14:33:13 +0300 Subject: [PATCH] perf record: Always record id index 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 Acked-by: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Link: https://lore.kernel.org/r/20220610113316.6682-3-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-record.c | 12 +++++------- tools/perf/util/synthetic-events.c | 7 +++++-- 2 files changed, 10 insertions(+), 9 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 3959a1b..00c2a6c 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -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, diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c index 27acdc5..d750744 100644 --- a/tools/perf/util/synthetic-events.c +++ b/tools/perf/util/synthetic-events.c @@ -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); -- 2.7.4