Re: [PATCH v3 4/7] perf probe: Generate event name with line number

[Arnaldo Carvalho de Melo]

Em Mon, Nov 18, 2019 at 05:12:20PM +0900, Masami Hiramatsu escreveu:
> Generate event name from function name with line number
> as <function>_L<line_number>. Note that this is only for
> the new event which is defined by the line number of
> function (except for line 0).
> 
> If there is another event on same line, you have to use
> "-f" option. In that case, the new event has "_1" suffix.
> 
>  e.g.
>   # perf probe -a kernel_read:2
>   Added new event:
>     probe:kernel_read_L2 (on kernel_read:2)
> 
>   You can now use it in all perf tools, such as:
> 
>   	perf record -e probe:kernel_read_L2 -aR sleep 1
> 
> 
> But if we omit the line number or 0th line, it will
> have no suffix.
> 
>   # perf probe -a kernel_read:0
>   Added new event:
>     probe:kernel_read (on kernel_read)
> 
>   You can now use it in all perf tools, such as:
> 
>   	perf record -e probe:kernel_read -aR sleep 1
> 
> # perf probe -l
>   probe:kernel_read    (on kernel_read@xxxxxxxxxxx/fs/read_write.c)
>   probe:kernel_read_L2 (on kernel_read:2@xxxxxxxxxxx/fs/read_write.c)

Thanks, tested and applied.

- Arnaldo