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| author | Adrian Hunter <adrian.hunter@intel.com> | 2022-06-10 14:33:13 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-06-23 17:54:22 +0300 |
| commit | 6b080312fc821658a479e74bdb0c3f7d9ac5838f (patch) | |
| tree | b352ced9650c1bc008eae0ba0e8e0a923a7b45ad /tools/perf/util/synthetic-events.c | |
| parent | f42c0ce573df79d1b8bd169008c994dcdd43585a (diff) | |
| download | linux-6b080312fc821658a479e74bdb0c3f7d9ac5838f.tar.xz | |
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 <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>
Diffstat (limited to 'tools/perf/util/synthetic-events.c')
| -rw-r--r-- | tools/perf/util/synthetic-events.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c index 27acdc5e5723..d75074486a55 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); |