linux/scripts/bloat-o-meter, branch master

scripts/bloat-o-meter: rename file arguments to match output

2026-03-28T04:19:33Z

The output of bloat-o-meter already uses the words 'old' and 'new' for symbol size in the table header, so reflect that in the corresponding argument names. Link: https://lkml.kernel.org/r/20260212213941.3984330-1-vkoskiv@gmail.com Signed-off-by: Valtteri Koskivuori Signed-off-by: Andrew Morton

scripts/bloat-o-meter: ignore __noinstr_text_start

2026-02-01T00:16:06Z

__noinstr_text_start is adding noise to the script, ignore it. For instance using __always_inline on __skb_incr_checksum_unnecessary and CC=clang build. Before this patch, __noinstr_text_start can show up and confuse us. $ scripts/bloat-o-meter -t vmlinux.old vmlinux.new add/remove: 0/2 grow/shrink: 3/0 up/down: 212/-206 (6) Function old new delta tcp6_gro_complete 208 283 +75 tcp4_gro_complete 376 449 +73 __noinstr_text_start 3536 3600 +64 __pfx___skb_incr_checksum_unnecessary 32 - -32 __skb_incr_checksum_unnecessary 174 - -174 Total: Before=25509464, After=25509470, chg +0.00% After this patch we have a more precise result. $ scripts/bloat-o-meter -t vmlinux.old vmlinux.new add/remove: 0/2 grow/shrink: 2/0 up/down: 148/-206 (-58) Function old new delta tcp6_gro_complete 208 283 +75 tcp4_gro_complete 376 449 +73 __pfx___skb_incr_checksum_unnecessary 32 - -32 __skb_incr_checksum_unnecessary 174 - -174 Total: Before=25505928, After=25505870, chg -0.00% Link: https://lkml.kernel.org/r/20260117083448.3877418-1-edumazet@google.com Signed-off-by: Eric Dumazet Signed-off-by: Andrew Morton

scripts/bloat-o-meter: count weak symbol sizes

2023-08-21T20:46:25Z

Currently, bloat-o-meter does not take into account weak symbols, and thus ignores any size changes in code or data marked __weak. Fix this by handling weak code ("w"/"W") and data ("v"/"V"). Link: https://lkml.kernel.org/r/a1e7abd2571c3bbfe75345d6ee98b276d2d5c39d.1692200010.git.geert+renesas@glider.be Signed-off-by: Geert Uytterhoeven Cc: Arnd Bergmann Signed-off-by: Andrew Morton

scripts/bloat-o-meter: use the reverse flag for sort

2023-02-03T06:50:03Z

The sort function has the inbuilt reversal option. We can use it to save some time. Link: https://lkml.kernel.org/r/20230106091319.3824-1-apantykhin@gmail.com Signed-off-by: Alexander Pantyukhin Cc: Nikolay Borisov Cc: Paul Gortmaker Signed-off-by: Andrew Morton

scripts/bloat-o-meter: add -p argument

2022-07-18T00:31:40Z

When doing cross platform development on a machine sometimes it might be useful to invoke bloat-o-meter for files which haven't been build with the native toolchain. In cases when the host nm doesn't support the target one then a toolchain-specific nm could be used. Add this ability by adding the -p allowing invocations as: ./scripts/bloat-o-meter -p riscv64-unknown-linux-gnu- file1.o file2.o Link: https://lkml.kernel.org/r/20220701113513.1938008-2-nborisov@suse.com Signed-off-by: Nikolay Borisov Signed-off-by: Andrew Morton

scripts/bloat-o-meter: switch argument parsing to using argparse

2022-07-18T00:31:40Z

This will facilitate further extension to the arguments the script takes. As an added benefit it also produces saner usage output, where mutual exclusivity of the c|d|t parameters is clearly visible: ./scripts/bloat-o-meter -h usage: bloat-o-meter [-h] [-c | -d | -t] file1 file2 Simple script used to compare the symbol sizes of 2 object files positional arguments: file1 First file to compare file2 Second file to compare optional arguments: -h, --help show this help message and exit -c categorize output based on symbol type -d Show delta of Data Section -t Show delta of text Section Link: https://lkml.kernel.org/r/20220701113513.1938008-1-nborisov@suse.com Signed-off-by: Nikolay Borisov Signed-off-by: Andrew Morton

scripts/bloat-o-meter: filter out vermagic as it is not relevant

2022-04-29T21:37:57Z

Seeing it as a false positive increase at the top is just noise: linux-head$./scripts/bloat-o-meter ../pre/vmlinux ../post/vmlinux add/remove: 0/571 grow/shrink: 1/9 up/down: 20/-64662 (-64642) Function old new delta vermagic 49 69 +20 Since it really doesn't "grow", it makes sense to filter it out. Link: https://lkml.kernel.org/r/20220428035824.7934-1-paul.gortmaker@windriver.com Signed-off-by: Paul Gortmaker Signed-off-by: Andrew Morton

scripts: switch explicitly to Python 3

2021-01-21T21:34:44Z

Some distributions are about to switch to Python 3 support only. This means that /usr/bin/python, which is Python 2, is not available anymore. Hence, switch scripts to use Python 3 explicitly. Signed-off-by: Andy Shevchenko Signed-off-by: Masahiro Yamada

tweewide: Fix most Shebang lines

2020-12-08T14:30:04Z

Change every shebang which does not need an argument to use /usr/bin/env. This is needed as not every distro has everything under /usr/bin, sometimes not even bash. Signed-off-by: Finn Behrens Signed-off-by: Masahiro Yamada

scripts/bloat-o-meter: Support comparing library archives

2020-08-07T18:33:21Z

Library archives (.a) usually contain multiple object files so their output of nm --size-sort contains lines like: 00000000000003a8 t run_test extent-map-tests.o: bloat-o-meter currently doesn't handle them which results in errors when calling .split() on them. Fix this by simply ignoring them. This enables diffing subsystems which generate built-in.a files. Signed-off-by: Nikolay Borisov Signed-off-by: Andrew Morton Link: http://lkml.kernel.org/r/20200603103513.3712-1-nborisov@suse.com Signed-off-by: Linus Torvalds