linux-kernel - Re: [RFC PATCH v5 0/7] perf config: Introduce default config key-value pairs arrays

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Date:	Tue, 12 Jul 2016 14:37:38 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Taeung Song <treeze.taeung@...il.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [RFC PATCH v5 0/7] perf config: Introduce default config
 key-value pairs arrays

Hi Taeung,

On Tue, Jul 12, 2016 at 01:20:35PM +0900, Taeung Song wrote:
> Hi, Namhyung :)
> 
> As you know, the patch work from v3 to v4 took too long time
> because of a patchset refactoring perf_config().
> 
> So I guess it is hard for you to recall this patchset for new default
> config arrays but could you a bit response two simple questions ?
> 
> 
> 1) I renamed 'fb_ground' to 'fore_back_colors' in struct ui_browser_colorset
> at ui/browser.c.
> 
> Is it better than before ?

Not sure.  I don't think the renaming is necessary.  If you do, I
prefer simpler name like 'colors' or 'color_pair'.


> 
> 2) I added not only 'struct default_config_item' but also
> 'struct default_config_section'.
> (In order to use const type and 'const struct default_config_item *items'
> instead of using 'struct list_head items')
> 
> could you agree this way ?

I'm ok with it.

Thanks,
Namhyung


> 
> On 07/06/2016 02:20 PM, Taeung Song wrote:
> > Hello, :)
> > 
> > When initializing default perf config values,
> > we currently use values of actual type(int, bool, char *, etc.).
> > But I suggest using default config key-value pairs arrays.
> > 
> > For example,
> > If there isn't user config value at ~/.perfconfig for 'annotate.use_offset' config variable,
> > default value for it is 'true' bool type value in perf like below.
> > 
> > At ui/browsers/annoate.c
> > 
> > static struct annotate_browser_opt {
> >         bool hide_src_code,
> >              use_offset,
> > 	    jump_arrows,
> > 	    show_linenr,
> > 	    show_nr_jumps,
> > 	    show_total_period;
> > } annotate_browser__opts = {
> >         .use_offset      = true,
> >         .jump_arrows     = true,
> > };
> > 
> > But if we use new config arrays that have all default config key-value pairs,
> > we could initialize default config values with them.
> > 
> > If we do, we can manage default perf config values at one spot (like util/config.c)
> > and It can be easy and simple to modify default config values or add new configs.
> > 
> > For example,
> > If we use new default config arrays and there isn't user config value for 'annoate.use_offset'
> > default value for it will be set as annotate_config_items[CONFIG_ANNOATE_USE_OFFSET].value
> > instead of actual boolean type value 'true'.
> > 
> > IMHO, I think it would needed to use new default config arrays
> > to manage default perf config values more effectively.
> > And this pathset contains patchs for only 'colors' and 'annoate' section
> > because waiting for other opinions.
> > 
> > If you review this patchset, I'd appreciate it :-)
> > 
> > Thanks,
> > Taeung
> > 
> > v5:
> > - rebased on current acme/perf/core
> > 
> > v4:
> > - rename 'fb_ground' to 'fore_back_colors' (Namhyung)
> > - add struct default_config_section
> > - split first patch[PATCH 1/7] as two
> > - remove perf_default_config_init() at perf.c
> > - rebased on current acme/perf/core
> > 
> > v3:
> > - remove default config arrays for the rest sections except 'colors' and 'annotate'
> > - use combined {fore, back}ground colors instead of each two color
> > - introduce perf_default_config_init() that call all default_*_config_init()
> >    for each config section
> > 
> > v2:
> > - rename 'ui_browser__config_gcolors' to 'ui_browser__config_colors' (Arnaldo)
> > - change 'ground colors' to '{back, fore}ground colors' (Arnaldo)
> > - use strtok + ltrim instead of strchr and while (isspace(*++bg)); (Arnaldo)
> > 
> > Taeung Song (7):
> >    perf config: Introduce default_config_section and default_config_item
> >      for default config key-value pairs
> >    perf config: Add macros assigning key-value pairs to
> >      default_config_item
> >    perf config: Add 'colors' section default configs arrrays
> >    perf config: Use combined {fore,back}ground colors value instead of
> >      each two color
> >    perf config: Initialize ui_browser__colorsets with default config
> >      items
> >    perf config: Add 'annotate' section default configs arrrays
> >    perf config: Initialize annotate_browser__opts with default config
> >      items
> > 
> >   tools/perf/ui/browser.c           | 64 +++++++++++++++++-------------
> >   tools/perf/ui/browsers/annotate.c | 16 ++++++--
> >   tools/perf/util/config.c          | 26 +++++++++++++
> >   tools/perf/util/config.h          | 82 +++++++++++++++++++++++++++++++++++++++
> >   4 files changed, 156 insertions(+), 32 deletions(-)
> >