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

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