linux-kernel - [PATCH] scripts/bloat-o-meter: print percent change

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Date:	Fri, 13 May 2016 12:51:50 +0530
From:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:	<linux-kernel@...r.kernel.org>
CC:	Vineet Gupta <Vineet.Gupta1@...opsys.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Josh Triplett <josh@...htriplett.org>,
	"Michal Marek" <mmarek@...e.cz>
Subject: [PATCH] scripts/bloat-o-meter: print percent change

This adds additional line of output (to end to reduce chances of breaking
any existing output parsers) which prints the tot size before and after
and the relative difference

add/remove: 39/0 grow/shrink: 12408/55 up/down: 362227/-1430 (360797)
function                                     old     new   delta
ext4_fill_super                            10556   12590   +2034
_fpadd_parts                                   -    1186   +1186
ntfs_fill_super                             5340    6164    +824
...
...
__divdf3                                     752     386    -366
unlzma                                      3682    3274    -408
Total: Before=5023101, After=5383898, chg 7.000000%
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Josh Triplett <josh@...htriplett.org>
Cc: Michal Marek <mmarek@...e.cz>
Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
---
 scripts/bloat-o-meter | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/bloat-o-meter b/scripts/bloat-o-meter
index 38b64f487315..0254f3ba0dba 100755
--- a/scripts/bloat-o-meter
+++ b/scripts/bloat-o-meter
@@ -32,18 +32,21 @@ old = getsizes(sys.argv[1])
 new = getsizes(sys.argv[2])
 grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
 delta, common = [], {}
+otot, ntot = 0, 0
 
 for a in old:
     if a in new:
         common[a] = 1
 
 for name in old:
+    otot += old[name]
     if name not in common:
         remove += 1
         down += old[name]
         delta.append((-old[name], name))
 
 for name in new:
+    ntot += new[name]
     if name not in common:
         add += 1
         up += new[name]
@@ -63,3 +66,6 @@ print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
 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))
-- 
2.5.0