linux-yocto/scripts/bloat-o-meter

#!/usr/bin/python

Copyright 2004 Matt Mackall mpm@selenic.com

inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen

This software may be used and distributed according to the terms

of the GNU General Public License, incorporated herein by reference.

import sys, os, re from signal import signal, SIGPIPE, SIG_DFL

signal(SIGPIPE, SIG_DFL)

if len(sys.argv) < 3: sys.stderr.write("usage: %s [option] file1 file2\n" % sys.argv[0]) sys.stderr.write("The options are:\n") sys.stderr.write("-c categorize output based on symbol type\n") sys.stderr.write("-d Show delta of Data Section\n") sys.stderr.write("-t Show delta of text Section\n") sys.exit(-1)

re_NUMBER = re.compile(r'.[0-9]+')

def getsizes(file, format): sym = {} with os.popen("nm --size-sort " + file) as f: for line in f: size, type, name = line.split() if type in format: # strip generated symbols if name.startswith("mod"): continue if name.startswith("SyS"): continue if name.startswith("compat_SyS_"): continue if name == "linux_banner": continue # statics and some other optimizations adds random .NUMBER name = re_NUMBER.sub('', name) sym[name] = sym.get(name, 0) + int(size, 16) return sym

def calc(oldfile, newfile, format): old = getsizes(oldfile, format) new = getsizes(newfile, format) 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]
        delta.append((new[name], name))

for name in common:
    d = new.get(name, 0) - old.get(name, 0)
    if d>0: grow, up = grow+1, up+d
    if d<0: shrink, down = shrink+1, down-d
    delta.append((d, name))

delta.sort()
delta.reverse()
return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot

def print_result(symboltype, symbolformat, argc): grow, shrink, add, remove, up, down, delta, old, new, otot, ntot =
calc(sys.argv[argc - 1], sys.argv[argc], symbolformat)

print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
      (add, remove, grow, shrink, up, -down, up-down))
print("%-40s %7s %7s %+7s" % (symboltype, "old", "new", "delta"))
for d, n in delta:
    if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))

if otot:
    percent = (ntot - otot) * 100.0 / otot
else:
    percent = 0
print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))

if sys.argv[1] == "-c": print_result("Function", "tT", 3) print_result("Data", "dDbB", 3) print_result("RO Data", "rR", 3) elif sys.argv[1] == "-d": print_result("Data", "dDbBrR", 3) elif sys.argv[1] == "-t": print_result("Function", "tT", 3) else: print_result("Function", "tTdDbBrR", 2)