linux-kernel - Re: [PATCH] scripts/bloat-o-meter: fix percent on <1% changes

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Date:	Wed, 15 Jun 2016 07:31:52 -0700
From:	Josh Triplett <josh@...htriplett.org>
To:	Riku Voipio <riku.voipio@...aro.org>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Vineet Gupta <vgupta@...opsys.com>,
	Michal Marek <mmarek@...e.cz>
Subject: Re: [PATCH] scripts/bloat-o-meter: fix percent on <1% changes

On Wed, Jun 15, 2016 at 11:45:11AM +0300, Riku Voipio wrote:
> Python divisions are integer divisions unless at least one parameter
> is a float. The current bloat-o-meter fails to print sub-percentage
> changes:
> 
> Total: Before=10515408, After=10604060, chg 0.000000%
> 
> Force float division by using one float and pretty the print to
> two significant decimals:
> 
> Total: Before=10515408, After=10604060, chg +0.84%
> 
> Signed-off-by: Riku Voipio <riku.voipio@...aro.org>
> Cc: Vineet Gupta <vgupta@...opsys.com>
> Cc: Josh Triplett <josh@...htriplett.org>
> Cc: Michal Marek <mmarek@...e.cz>

Good idea.
Reviewed-by: Josh Triplett <josh@...htriplett.org>

> ---
>  scripts/bloat-o-meter | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/scripts/bloat-o-meter b/scripts/bloat-o-meter
> index 0254f3b..19f5adf 100755
> --- a/scripts/bloat-o-meter
> +++ b/scripts/bloat-o-meter
> @@ -67,5 +67,5 @@ print("%-40s %7s %7s %+7s" % ("function", "old", "new", "delta"))
>  for d, n in delta:
>      if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))
>  
> -print("Total: Before=%d, After=%d, chg %f%%" % \
> -    (otot, ntot, (ntot - otot)*100/otot))
> +print("Total: Before=%d, After=%d, chg %+.2f%%" % \
> +    (otot, ntot, (ntot - otot)*100.0/otot))
> -- 
> 2.1.4
>