linux-kernel - Re: [PATCH 1/2] perf tools: Add --tui and --stdio to choose the UI

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Date:	Sun, 22 Aug 2010 11:11:23 -0300
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 1/2] perf tools: Add --tui and --stdio to choose the UI

Em Sun, Aug 22, 2010 at 04:20:03AM -0400, Christoph Hellwig escreveu:
> On Sat, Aug 21, 2010 at 03:26:58PM -0300, Arnaldo Carvalho de Melo wrote:
> > > Btw, am I the only one that doesn't find the next interface too helpful?
> > > In general the line oriented interface seem to present the information
> > > much better, and in the cases where it gets too complicated the newt

> > Much better how, exactly?

>  - it uses the space available in a terminal window much more
>    efficiently.  Output starts in row 0, column 0 and expands all the
>    way that's needed.
>  - it incluses a descruption of what the columns of output mean
>  - it provides percentages for the individual callchains parts after
>    branching out
>  - in graph/fractal modes there are lines that show how the parts
>    are connected, making it possible to read the output, unlinke
>    the TUI mode where the "expanind" nodes are very hard to follow.
>  - just running perf reports gets an overview of all callchains instead
>    of having to expand dozens of things
>  - the colour scheme is the normal shell one (light gray on black for
>    me) instead of one hurting the eyes

All good points, will work on them, thanks for pointing them out!
 
> 
> > > interface doesn't really helper either.  A real gtk/qt interface with
> > > a proper tree widget would seem like the more useful interface for that.
> > 
> > What would a gtk/qt interface buy us that is not present on the TUI
> > right now?
> 
> Generally for tree/graph like data structures a real X GUI provides much
> nicer rendering.  It'll allow to render the connected lines just as in
> the line oriented interface, but in a nicer way using real thin lines

Cool, connected lines is something that indeed has to happen, just like
mutt in threaded mode, will work on that.

> in a tree widget.  It'll also genereally allow better text placement
> in the window compared to the single centered window in the newt
> interface.   Also the GUI programs follow the common color scheme of the
> rest of the desktop instead of hurting your eye.  In addition to that

Lets stop hurting eyes!

> scrollbars (horizontal / vertical) are a lot more intuitive in a typical
> X GUI than in newt.

Ok, thanks for the detailed description of the problems.

- Arnaldo
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