1 #!/usr/bin/python
2 #
3 # Copyright 2004 Matt Mackall <mpm@selenic.com>
4 #
5 # inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen
6 #
7 # This software may be used and distributed according to the terms
8 # of the GNU General Public License, incorporated herein by reference.
9
10 import sys, os, re
11 from signal import signal, SIGPIPE, SIG_DFL
12
13 signal(SIGPIPE, SIG_DFL)
14
15 if len(sys.argv) != 3:
16 sys.stderr.write("usage: %s file1 file2\n" % sys.argv[0])
17 sys.exit(-1)
18
19 re_NUMBER = re.compile(r'\.[0-9]+')
20
21 def getsizes(file):
22 sym = {}
23 with os.popen("nm --size-sort " + file) as f:
24 for line in f:
25 size, type, name = line.split()
26 if type in "tTdDbBrR":
27 # strip generated symbols
28 if name.startswith("__mod_"): continue
29 if name.startswith("SyS_"): continue
30 if name.startswith("compat_SyS_"): continue
31 if name == "linux_banner": continue
32 # statics and some other optimizations adds random .NUMBER
33 name = re_NUMBER.sub('', name)
34 sym[name] = sym.get(name, 0) + int(size, 16)
35 return sym
36
37 old = getsizes(sys.argv[1])
38 new = getsizes(sys.argv[2])
39 grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
40 delta, common = [], {}
41 otot, ntot = 0, 0
42
43 for a in old:
44 if a in new:
45 common[a] = 1
46
47 for name in old:
48 otot += old[name]
49 if name not in common:
50 remove += 1
51 down += old[name]
52 delta.append((-old[name], name))
53
54 for name in new:
55 ntot += new[name]
56 if name not in common:
57 add += 1
58 up += new[name]
59 delta.append((new[name], name))
60
61 for name in common:
62 d = new.get(name, 0) - old.get(name, 0)
63 if d>0: grow, up = grow+1, up+d
64 if d<0: shrink, down = shrink+1, down-d
65 delta.append((d, name))
66
67 delta.sort()
68 delta.reverse()
69
70 print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
71 (add, remove, grow, shrink, up, -down, up-down))
72 print("%-40s %7s %7s %+7s" % ("function", "old", "new", "delta"))
73 for d, n in delta:
74 if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))
75
76 print("Total: Before=%d, After=%d, chg %+.2f%%" % \
77 (otot, ntot, (ntot - otot)*100.0/otot))
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.