[PATCH] perf/tui: Change default selection background color to yellow

[PATCH] perf/tui: Change default selection background color to yellow

[Ingo Molnar]

Boris reported that 'perf top' is unusable on his default 'black on 
white' terminal, which uses (eye friendly) light-grey as a background 
color.

The reason is that the TUI cursor for the current selection line uses 
HE_COLORSET_SELECTED, and that has a default background color of 
'lightgrey' - which is a common terminal background choice and thus 
the colors conflict.

Use yellow as the background color instead: that should be an uncommon 
terminal background, yet it's still ergonomic on both black and 
white/grey terminals.

[ It would be a better solution to straight out detect color
  collisions and resolve them reasonably by converting them to RGB and
  calculating color space distances, but I was unable to find
  proper documentation for SLtt_get_color_object() to recover the
  current color scheme so I gave up ... Yellow works well enough. ]

Reported-by: Borislav Petkov <bp@alien8.de>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: David Binderman <dcb314@hotmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 tools/perf/ui/browser.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index 6680fa5cb9dd..688acb94c01f 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -499,7 +499,7 @@ static struct ui_browser_colorset {
 		.colorset = HE_COLORSET_SELECTED,
 		.name	  = "selected",
 		.fg	  = "black",
-		.bg	  = "lightgray",
+		.bg	  = "yellow",
 	},
 	{
 		.colorset = HE_COLORSET_CODE,

Re: [PATCH] perf/tui: Change default selection background color to yellow

[Borislav Petkov]

On Thu, Mar 05, 2015 at 11:32:13AM +0100, Ingo Molnar wrote:
> 
> Boris reported that 'perf top' is unusable on his default 'black on 
> white' terminal, which uses (eye friendly) light-grey as a background 
> color.
> 
> The reason is that the TUI cursor for the current selection line uses 
> HE_COLORSET_SELECTED, and that has a default background color of 
> 'lightgrey' - which is a common terminal background choice and thus 
> the colors conflict.
> 
> Use yellow as the background color instead: that should be an uncommon 
> terminal background, yet it's still ergonomic on both black and 
> white/grey terminals.
> 
> [ It would be a better solution to straight out detect color
>   collisions and resolve them reasonably by converting them to RGB and
>   calculating color space distances, but I was unable to find
>   proper documentation for SLtt_get_color_object() to recover the
>   current color scheme so I gave up ... Yellow works well enough. ]
> 
> Reported-by: Borislav Petkov <bp@alien8.de>

	  -and-tested-by: Boris

Thanks.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--

Re: [PATCH] perf/tui: Change default selection background color to yellow

[Arnaldo Carvalho de Melo]

Em Thu, Mar 05, 2015 at 11:32:13AM +0100, Ingo Molnar escreveu:
> Boris reported that 'perf top' is unusable on his default 'black on 
> white' terminal, which uses (eye friendly) light-grey as a background 
> color.
> 
> The reason is that the TUI cursor for the current selection line uses 
> HE_COLORSET_SELECTED, and that has a default background color of 
> 'lightgrey' - which is a common terminal background choice and thus 
> the colors conflict.
> 
> Use yellow as the background color instead: that should be an uncommon 
> terminal background, yet it's still ergonomic on both black and 
> white/grey terminals.
> 
> [ It would be a better solution to straight out detect color
>   collisions and resolve them reasonably by converting them to RGB and
>   calculating color space distances, but I was unable to find
>   proper documentation for SLtt_get_color_object() to recover the
>   current color scheme so I gave up ... Yellow works well enough. ]

Thanks, applying.

BTW, I started with newt, thinking it would give me good widgets, only
to, after having reached its limitations write my own, this time just
on, like newt, top of slang's tui libraries, eventually I think I'll
move to ncurses or even just use the kernel tty interface directly ;-)

- Arnaldo

Re: [PATCH] perf/tui: Change default selection background color to yellow

[Ingo Molnar]

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

> Em Thu, Mar 05, 2015 at 11:32:13AM +0100, Ingo Molnar escreveu:
> > Boris reported that 'perf top' is unusable on his default 'black on 
> > white' terminal, which uses (eye friendly) light-grey as a background 
> > color.
> > 
> > The reason is that the TUI cursor for the current selection line uses 
> > HE_COLORSET_SELECTED, and that has a default background color of 
> > 'lightgrey' - which is a common terminal background choice and thus 
> > the colors conflict.
> > 
> > Use yellow as the background color instead: that should be an uncommon 
> > terminal background, yet it's still ergonomic on both black and 
> > white/grey terminals.
> > 
> > [ It would be a better solution to straight out detect color
> >   collisions and resolve them reasonably by converting them to RGB and
> >   calculating color space distances, but I was unable to find
> >   proper documentation for SLtt_get_color_object() to recover the
> >   current color scheme so I gave up ... Yellow works well enough. ]
> 
> Thanks, applying.
> 
> BTW, I started with newt, thinking it would give me good widgets, 
> only to, after having reached its limitations write my own, this 
> time just on, like newt, top of slang's tui libraries, eventually I 
> think I'll move to ncurses or even just use the kernel tty interface 
> directly ;-)

LOL! :-)

Btw., a related problem: X terminals are pretty high overhead 
unfortunately, I cringe every time I run 'perf top' on a very fast 
system:

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                                                                               
 4240 mingo     20   0 1031088 176112 106648 S   5.9  0.3 101:54.30 konsole                                                                                               
 1985 root      20   0  649412 194760 157464 S   3.0  0.3  41:49.94 Xorg                                                                                                  
 2395 mingo     20   0 2283956 526044 127108 S   2.0  0.8  34:40.23 compiz                     
13258 mingo     20   0  207588  70916  12112 S   1.3  0.1   0:03.01 perf                                                                                                  

10%+ of GUI CPU overhead with a refresh every 2 seconds (i.e. only 0.5 
fps) - ridiculous!

So to fix this I think we eventually want a raw OpenGL client for 
local system 'perf top' use and such: that would be (by far) the 
lowest overhead UI interface to run profiling from without disturbing 
the system, with UI overhead in the ~1% range at most.

Raw (no toolkits) OpenGL would also allow us to do a lot of other UI 
and performance tricks.

Would you have any fundamental objections against OpenGL UI clients?

Thanks,

	Ingo

[tip:perf/core] perf tui: Change default selection background color to yellow

[tip-bot for Ingo Molnar]

Commit-ID:  8d7d377c2bea16afa6b600a4517615a9eebb259b
Gitweb:     http://git.kernel.org/tip/8d7d377c2bea16afa6b600a4517615a9eebb259b
Author:     Ingo Molnar <mingo@kernel.org>
AuthorDate: Thu, 5 Mar 2015 11:32:13 +0100
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 9 Dec 2015 13:41:55 -0300

perf tui: Change default selection background color to yellow

Boris reported that 'perf top' is unusable on his default 'black on
white' terminal, which uses (eye friendly) light-grey as a background
color.

The reason is that the TUI cursor for the current selection line uses
HE_COLORSET_SELECTED, and that has a default background color of
'lightgrey' - which is a common terminal background choice and thus
the colors conflict.

Use yellow as the background color instead: that should be an uncommon
terminal background, yet it's still ergonomic on both black and
white/grey terminals.

[ It would be a better solution to straight out detect color
  collisions and resolve them reasonably by converting them to RGB and
  calculating color space distances, but I was unable to find
  proper documentation for SLtt_get_color_object() to recover the
  current color scheme so I gave up ... Yellow works well enough. ]

Reported-and-Tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Binderman <dcb314@hotmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20150305103213.GA23046@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/ui/browser.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index e9703c0..d372021 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -528,7 +528,7 @@ static struct ui_browser_colorset {
 		.colorset = HE_COLORSET_SELECTED,
 		.name	  = "selected",
 		.fg	  = "black",
-		.bg	  = "lightgray",
+		.bg	  = "yellow",
 	},
 	{
 		.colorset = HE_COLORSET_CODE,