linux-kernel - Re: [PATCH] perf list: Hide deprecated events by default

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Message-ID: <20191015091401.GE10951@krava>
Date:   Tue, 15 Oct 2019 11:14:01 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Jin Yao <yao.jin@...ux.intel.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH] perf list: Hide deprecated events by default

On Tue, Oct 15, 2019 at 10:53:57AM +0800, Jin Yao wrote:
> There are some deprecated events listed by perf list. But we can't remove
> them from perf list with ease because some old scripts may use them.
> 
> Deprecated events are old names of renamed events.  When an event gets
> renamed the old name is kept around for some time and marked with
> Deprecated. The newer Intel event lists in the tree already have these
> headers.
> 
> So we need to keep them in the event list, but provide a new option to
> show them. The new option is "--deprecated".
> 
> With this patch, the deprecated events are hidden by default but they can
> be displayed when option "--deprecated" is enabled.

not sure it's wise to hide them, because people will not read man page
to find --deprecated option, they will rather complain right away ;-)

how about to display them as another topic, like:

pipeline:
	...
uncore:
	...
deprecated:
	...

jirka