lkml.org 
[lkml]   [2019]   [Mar]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v9 perf,bpf 09/15] perf, bpf: save btf information as headers to perf.data
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

\
 
 \ /
  Last update: 2019-03-15 20:27    [W:0.085 / U:0.252 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site