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

[Vineet Gupta]

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@xxxxxxxxxxxxxxxxxxxx>
Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Cc: Michal Marek <mmarek@xxxxxxx>
Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxxxx>
---
 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