linux-kernel - Re: [PATCH] perf report: auto-detect branch stack sampling mode

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Message-ID: <20120305172008.GA29411@elte.hu>
Date:	Mon, 5 Mar 2012 18:20:08 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, acme@...hat.com, dsahern@...il.com,
	ravitillo@....gov, khandual@...ux.vnet.ibm.com, asharma@...com,
	robert.richter@....com, ming.m.lin@...el.com,
	vweaver1@...s.utk.edu, andi@...stfloor.org
Subject: Re: [PATCH] perf report: auto-detect branch stack sampling mode


* Stephane Eranian <eranian@...gle.com> wrote:

> On Mon, Mar 5, 2012 at 5:30 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> > On Mon, 2012-03-05 at 16:56 +0100, Ingo Molnar wrote:
> >> A third usability bug is that for some reason a branch sampling
> >> 'perf report' defaults to the stdio output on my testsystem -
> >> with --no-branch-stack it gives the regular tui.
> >>
> >>
> > Ah, I would not have noticed that since I still explicitly 
> > build my perf without TUI support. That stuff mostly just 
> > gets in the way.
> 
> I tend to agree with Peter here.

I use the TUI most of the time (it allows me to navigate and 
look at annotated output easily - something the --stdio one 
cannot do), and I know at least two other kernel developers who 
prefer the TUI, so it's a YMMV thing.

> There is no TUI support for branch as of now.

Why? What would be needed to add proper TUI support?

Thanks,

	Ingo
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