Re: [RFC] perf-cache command interface design

From: Namhyung Kim
Date: Sun Nov 16 2014 - 22:09:08 EST

Hi Masami,

On Thu, 13 Nov 2014 00:25:57 +0900, Masami Hiramatsu wrote:
> (2014/11/11 22:10), Arnaldo Carvalho de Melo wrote:
>> What I meant was, what is wrong with replacing:
>> perf cache --probe <SPEC> # for the current kernel
>> With:
>> perf cache --add <PROBE-SPEC> # for the current kernel
>> And have it figure out that what is being added is a probe and do the
>> right thing?
> As I've said previously, PROBE-SPEC can be same as FILES (imagine that a binary
> file which has same name function in the kernel.)
> Moreover, PROBE-SPEC requires the target binary(or kernel module) except for
> kernel probes. In that case, anyway we need -x or -m options with file-path
> for --add, that is very strange.
> e.g.
> For me,
> perf cache --add ./binary --probe '*'
> looks more natural than
> perf cache --add '*' -exec ./binary
> since in other cases(sdt/elf), we'll just do
> perf cache --add ./binary

I prefer this too. But I'd like make the 'add' part a subcommand rather
than option like we do in perf kmem/kvm/list/lock/mem/sched ... And it
can handle multiple files at once. What about this?

perf cache add [--elf|--sdt|--probe <spec>] <binary> [<binary>...]

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