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SubjectRe: [PATCH] update kernel's scripts/bloat-o-meter from busybox
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On Mon, 2009-06-01 at 15:26 -0400, Robin Getz wrote:
> From: "Rob Landley" <rob@landley.net>
> From: "Denis Vlasenko" <vda.linux@googlemail.com>
> From: "Bernhard Reutner-Fischer" <rep.dot.nop@gmail.com>
>
> Since bloat-o-meter was added to the kernel's source tree, it has received
> little attention - either it works really well - or no one uses it. I suspect
> the first :)
>
> However - some folks who have been using it more (mainly as part of busybox)
> have been poking at it more often - and the output is a little more friendly
> now.
>
> http://git.busybox.net/busybox/log/scripts/bloat-o-meter
>
> I think Rob had been sending early patches both places, but somewhere along
> the line things never made it to lkml.

I probably dropped them on the ground during a busy spell.

> Acked-by: Robin Getz <rgetz@blackfin.uclinux.org>
>
> ---
> Since none of this is from me, I can only add my Acked by. Bernhard, Denis,
> and Rob will need to add their Signed-off-by separately.
>
> ----
>
>
> bloat-o-meter | 37 +++++++++++++++++++++++++++++--------
> 1 file changed, 29 insertions(+), 8 deletions(-)
>
>
>
> Index: scripts/bloat-o-meter
> ===================================================================
> --- scripts/bloat-o-meter (revision 6437)
> +++ scripts/bloat-o-meter (working copy)
> @@ -9,18 +9,37 @@
>
> import sys, os, re
>
> -if len(sys.argv) != 3:
> +def usage():
> sys.stderr.write("usage: %s file1 file2\n" % sys.argv[0])
> sys.exit(-1)
>
> +if len(sys.argv) < 3:
> + usage()
> +
> +for f in sys.argv[1], sys.argv[2]:

in sys.argv[1:3]: is a bit more standard

But this test should instead happen inside getsizes, no loop needed.

> + if not os.path.exists(f):
> + sys.stderr.write("Error: file '%s' does not exist\n" % f)
> + usage()
> +
> +nm_args = " ".join([x for x in sys.argv[3:]])

nm_args = " ".join(sys.argv[3:])

> def getsizes(file):
> sym = {}
> - for l in os.popen("nm --size-sort " + file).readlines():
> - size, type, name = l[:-1].split()
> - if type in "tTdDbB":
> + for l in os.popen("nm --size-sort %s %s" % (nm_args, file)).readlines():
> + l = l.strip()
> + # Skip empty lines
> + if not len(l): continue

(seems to be some whitespace damage? there should be no tabs in this
source)

if not l

> + # Skip archive members
> + if len(l.split()) == 1 and l.endswith(':'):

if ' ' not in l ...

> + continue
> + size, type, name = l.split()
> + if type in "tTdDbBrR":
> # function names begin with '.' on 64-bit powerpc
> if "." in name[1:]: name = "static." + name.split(".")[0]
> sym[name] = sym.get(name, 0) + int(size, 16)
> + for l in os.popen("readelf -S " + file).readlines():
> + x = l.split()
> + if len(x)<6 or x[1] != ".rodata": continue
> + sym[".rodata"] = int(x[5], 16)

Not sure what this addition is about?

> return sym
>
> old = getsizes(sys.argv[1])
> @@ -53,8 +72,10 @@
> delta.sort()
> delta.reverse()
>
> -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" % ("function", "old", "new", "delta")
> +print "%-48s %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)
> + if d: print "%-48s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d)
> +print "-"*78
> +total="(add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s)%%sTotal: %s
> bytes"\
> + % (add, remove, grow, shrink, up, -down, up-down)
> +print total % (" "*(80-len(total)))

Not terribly excited about this last bit, which is going out of its way
to right-align the total? Who cares about that?

--
http://selenic.com : development and support for Mercurial and Linux




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