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 def getsizes(file): 20 sym = {} 21 for l in os.popen("nm --size-sort " + file).readlines(): 22 size, type, name = l[:-1].split() 23 if type in "tTdDbBrR": 24 # strip generated symbols 25 if name.startswith("__mod_"): continue 26 if name.startswith("SyS_"): continue 27 if name.startswith("compat_SyS_"): continue 28 if name == "linux_banner": continue 29 # statics and some other optimizations adds random .NUMBER 30 name = re.sub(r'\.[0-9]+', '', name) 31 sym[name] = sym.get(name, 0) + int(size, 16) 32 return sym 33 34 old = getsizes(sys.argv[1]) 35 new = getsizes(sys.argv[2]) 36 grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0 37 delta, common = [], {} 38 otot, ntot = 0, 0 39 40 for a in old: 41 if a in new: 42 common[a] = 1 43 44 for name in old: 45 otot += old[name] 46 if name not in common: 47 remove += 1 48 down += old[name] 49 delta.append((-old[name], name)) 50 51 for name in new: 52 ntot += new[name] 53 if name not in common: 54 add += 1 55 up += new[name] 56 delta.append((new[name], name)) 57 58 for name in common: 59 d = new.get(name, 0) - old.get(name, 0) 60 if d>0: grow, up = grow+1, up+d 61 if d<0: shrink, down = shrink+1, down-d 62 delta.append((d, name)) 63 64 delta.sort() 65 delta.reverse() 66 67 print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \ 68 (add, remove, grow, shrink, up, -down, up-down)) 69 print("%-40s %7s %7s %+7s" % ("function", "old", "new", "delta")) 70 for d, n in delta: 71 if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d)) 72 73 print("Total: Before=%d, After=%d, chg %+.2f%%" % \ 74 (otot, ntot, (ntot - otot)*100.0/otot)) 75