linux-kernel - [PATCH] bloat-o-meter: ignore __addressable

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Date:   Fri,  2 Nov 2018 22:00:25 +0100
From:   Rasmus Villemoes <linux@...musvillemoes.dk>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Ingo Molnar <mingo@...nel.org>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Maninder Singh <maninder1.s@...sung.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Matteo Croce <mcroce@...hat.com>
Cc:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] bloat-o-meter: ignore __addressable_ symbols

Since __LINE__ is part of the symbol created by __ADDRESSABLE, almost
any change causes those symbols to disappear and get reincarnated, e.g.

add/remove: 4/4 grow/shrink: 0/3 up/down: 32/-171 (-139)
Function                                     old     new   delta
__addressable_tracing_set_default_clock8649       -       8      +8
__addressable_tracer_init_tracefs8631          -       8      +8
__addressable_ftrace_dump8383                  -       8      +8
__addressable_clear_boot_tracer8632            -       8      +8
__addressable_tracing_set_default_clock8650       8       -      -8
__addressable_tracer_init_tracefs8632          8       -      -8
__addressable_ftrace_dump8384                  8       -      -8
__addressable_clear_boot_tracer8633            8       -      -8
trace_default_header                         663     642     -21
tracing_mark_raw_write                       406     355     -51
tracing_mark_write                           624     557     -67
Total: Before=63889, After=63750, chg -0.22%

They're small and in .discard, so ignore them, leading to more useful

add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-139 (-139)
Function                                     old     new   delta
trace_default_header                         663     642     -21
tracing_mark_raw_write                       406     355     -51
tracing_mark_write                           624     557     -67
Total: Before=63721, After=63582, chg -0.22%

Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
 scripts/bloat-o-meter | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/bloat-o-meter b/scripts/bloat-o-meter
index a923f05edb36..8c965f6a9881 100755
--- a/scripts/bloat-o-meter
+++ b/scripts/bloat-o-meter
@@ -32,6 +32,7 @@ def getsizes(file, format):
                 if name.startswith("__mod_"): continue
                 if name.startswith("__se_sys"): continue
                 if name.startswith("__se_compat_sys"): continue
+                if name.startswith("__addressable_"): continue
                 if name == "linux_banner": continue
                 # statics and some other optimizations adds random .NUMBER
                 name = re_NUMBER.sub('', name)
-- 
2.19.1.6.gbde171bbf5