linux-kernel - [RFC] perf script: modify field selection option

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Message-ID: <CABPqkBQtXcbaimPYf9-QNHQgakJFx7SjGStbDLZ1wKPYYSxzZg@mail.gmail.com>
Date:   Mon, 20 Nov 2017 12:53:04 -0800
From:   Stephane Eranian <eranian@...gle.com>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>, mingo@...e.hu,
        Andi Kleen <ak@...ux.intel.com>,
        David Ahern <dsahern@...il.com>
Subject: [RFC] perf script: modify field selection option

Hi,

I have been using the perf script -F option on the latest perf and I
find it not very convenient to use. I appreciate the + and - prefix to
field names to add or suppress them. But most of the time, I want to
print only one or two fields and I have to guess which ones are there
by default so I can suppress them. I think there should be a way to
say: start from no fields. I understand why you have default to
maintain compatibility with older perf script but I would like a
syntax to say: remove defaults. For instance:

$ perf script -F --,+ip,+syms .....

Where -- would mean drop all defaults.

Any better suggestions?