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

From: Arnaldo Carvalho de Melo
Date: Wed Feb 24 2016 - 10:19:28 EST

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 +

[root@jouet 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