linux-kernel - Re: [RFC PATCH 0/7] perf tools: Config BPF maps through perf cmdline

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Date:	Sat, 17 Oct 2015 13:35:13 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Wang Nan <wangnan0@...wei.com>, acme@...nel.org,
	brendan.d.gregg@...il.com
Cc:	a.p.zijlstra@...llo.nl, daniel@...earbox.net, dsahern@...il.com,
	hekuang@...wei.com, jolsa@...nel.org, lizefan@...wei.com,
	masami.hiramatsu.pt@...achi.com, namhyung@...nel.org,
	paulus@...ba.org, linux-kernel@...r.kernel.org, pi3orama@....com,
	xiakaixu@...wei.com
Subject: Re: [RFC PATCH 0/7] perf tools: Config BPF maps through perf cmdline

On 10/17/15 3:48 AM, Wang Nan wrote:
> In these 7 patches:
>
>   1. perf is able to put values into map:
>    # perf record -e mybpf.c/maps.values.value=1234/ ...
>
>   2. perf is able to control different slots in a map separately:
>    # perf record -e mybpf.c/maps.values.value[1,4-6]=1234,maps.values.value[0,2-3]=5678/ ...
>
>   3. The second syntax can be applied to perf event also:
>    # perf record -v -a -e evt=cycles -e mybpf.c/maps.pmu_map.event[0]=evt/ ...
>
>   4. Compatible with the old syntax:
>    # perf record -v -a -e evt=cycles -e mybpf.c/maps.pmu_map.event=evt/ ...

The concept looks good and solves real need.
No opinion on implementation.

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