linux-kernel - Re: [RFC] hotkey for disabling/enabling events in 'perf top' TUI was Re: [GIT PULL 0/8] perf/core improvements and fixes

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Message-ID: <20150618205813.GA476@gmail.com>
Date:	Thu, 18 Jun 2015 22:58:13 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	Adrian Hunter <adrian.hunter@...el.com>,
	Borislav Petkov <bp@...e.de>, David Ahern <dsahern@...il.com>,
	Don Zickus <dzickus@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	He Kuang <hekuang@...wei.com>, Jiri Olsa <jolsa@...hat.com>,
	Li Zhang <zhlcindy@...ux.vnet.ibm.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Naohiro Aota <naota@...sp.net>,
	Peter Zijlstra <peterz@...radead.org>, pi3orama@....com,
	Stephane Eranian <eranian@...gle.com>,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
	Wang Nan <wangnan0@...wei.com>, Zefan Li <lizefan@...wei.com>
Subject: Re: [RFC] hotkey for disabling/enabling events in 'perf top' TUI was
 Re: [GIT PULL 0/8] perf/core improvements and fixes


* Arnaldo Carvalho de Melo <acme@...nel.org> wrote:

> Em Thu, Jun 18, 2015 at 09:40:10AM +0200, Ingo Molnar escreveu:
> > * Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
> > > User visible:
> 
> > > - Allow disabling/enabling events dynamicly in 'perf top':
> > >   a 'perf top' session can instantly become a 'perf report'
> > >   one, i.e. going from dynamic analysis to a static one,
> > >   returning to a dynamic one is possible, to toogle the
> > >   modes, just press CTRL+z. (Arnaldo Carvalho de Melo)
>  
> > Nice!! :-)
>  
> > Btw., it would be nice if the status line carried information about whether 
> > collection is 'frozen' or running, at a glance. A hint might also suggest how to 
> > unfreeze the session - in case someone pressed Ctrl-Z to suspend the perf top 
> > session ...
> 
> Right, and I think we better find other hotkey and make Ctrl+Z work like
> with other tools, i.e. suspend:
> 
> [acme@zoo linux]$ mutt
> 
> [1]+  Stopped                 mutt
> [acme@zoo linux]$ vim
> 
> [2]+  Stopped                 vim
> [acme@zoo linux]$ 
> 
> The perf TUI should work like that as well...
> 
> Ideas?
> 
> We already have:
> 
> h/?/F1        Show this window
> UP/DOWN/PGUP
> PGDN/SPACE    Navigate
> q/ESC/CTRL+C  Exit browser
> 
> For multiple event sessions:
> 
> TAB/UNTAB     Switch events
> 
> For symbolic views (--sort has sym):
> 
> ->            Zoom into DSO/Threads & Annotate current symbol
> <-            Zoom out
> a             Annotate current symbol
> C             Collapse all callchains
> d             Zoom into current DSO
> D             Show some developer debug info
> E             Expand all callchains
> F             Toggle percentage of filtered entries
> H             Display column headers
> i             Show header information
> P             Print histograms to perf.hist.N
> r             Run available scripts
> s             Switch to another data file in PWD
> t             Zoom into current Thread
> V             Verbose (DSO names in callchains, etc)
> z             Toggle zeroing of samples 
> /             Filter symbol by name 

Is 'f' (for 'freeze') still available?

Thanks,

	Ingo
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