linux-kernel - Re: [RFC PATCH 2/2] perf script: Print bpf-output events in 'perf script'

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Message-ID: <20160224151918.GC8720@kernel.org>
Date:	Wed, 24 Feb 2016 12:19:18 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Wang Nan <wangnan0@...wei.com>
Cc:	jolsa@...nel.org, linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Brendan Gregg <brendan.d.gregg@...il.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Li Zefan <lizefan@...wei.com>, pi3orama@....com
Subject: Re: [RFC PATCH 2/2] perf script: Print bpf-output events in 'perf
 script'

Em Wed, Feb 24, 2016 at 11:20:45AM +0000, Wang Nan escreveu:
> This patch allows 'perf script' output messages from BPF program.
> For example, use test_bpf_output_3.c at the end of this commit
> message,
> 
>  # ./perf record -e bpf-output/no-inherit,name=evt/ \
>                  -e ./test_bpf_output_3.c/map:channel.event=evt/ \
>                  usleep 100000

Trying to test this with 'perf trace', i.e. to shortcircuit record +
analysis:

[root@...et bpf]# perf trace -a --ev bpf-output/no-inherit,name=evt/ --ev ./test_bpf_output_3.c/map:channel.event=evt/ --ev 'perf_bpf_probe:*' usleep 100000
Failed to set filter "common_pid != 23954" on event evt with 22 (Invalid argument)

Can't we set tracepoint filters on these events?

- Arnaldo