Messages in this thread | | | From | Arnaldo Carvalho de Melo <> | Date | Fri, 15 Mar 2019 16:26:10 -0300 | Subject | Re: [PATCH v9 perf,bpf 09/15] perf, bpf: save btf information as headers to perf.data |
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Em Fri, Mar 15, 2019 at 04:06:51PM -0300, Arnaldo Carvalho de Melo escreveu: > And yes, there are BPF programs with BTF information associated:
> [root@quaco perf]# bpftool map dump pids_filtered > [{ > "key": 2592, > "value": true > },{ > "key": 20511, > "value": true > } > ] > [root@quaco perf]#
> I.e. bpftool can find the BTF info and thus is able to show the > 'pids_filtered' map keys and values pretty printed, not just as hex raw > data.
> I'm trying to find out why 'bpftool map dump' finds the BTF info while > perf_event__synthesize_one_bpf_prog() doesn't.
Humm, the BTF info above is for BPF _maps_ not for _programs_, I think you haven't added BTF info for maps in the perf.data header, right?
- Arnaldo
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