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

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

[Riku Voipio]

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@linaro.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Michal Marek <mmarek@suse.cz>
---
 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

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

[Josh Triplett]

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@linaro.org>
> Cc: Vineet Gupta <vgupta@synopsys.com>
> Cc: Josh Triplett <josh@joshtriplett.org>
> Cc: Michal Marek <mmarek@suse.cz>

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