Messages in this thread Patch in this message | | | Date | Wed, 3 Apr 2019 16:37:38 +0200 | From | Jiri Olsa <> | Subject | [BUG] perf: intel_pt won't display kernel function |
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hi, perf script --call-trace stop working for me recently, and displays only user space functions
I bisected that to: 7b612e291a5a perf tools: Synthesize PERF_RECORD_* for loaded BPF programs
data from following comands will display user space functions only: # perf-with-kcore record pt -e intel_pt// -- ls # perf-with-kcore script pt --call-trace
when I disable the bpf synthesizing (patch below), kernel functions are back
I guess the new events mess up with intel_pt decoder somehow
thanks, jirka
--- diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 4e2d953d4bc5..3daa78bc6549 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -1114,10 +1114,12 @@ static int record__synthesize(struct record *rec, bool tail) return err; } +#if 0 err = perf_event__synthesize_bpf_events(session, process_synthesized_event, machine, opts); if (err < 0) pr_warning("Couldn't synthesize bpf events.\n"); +#endif err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads, process_synthesized_event, opts->sample_address,
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