Changes in bloat-o-meter

c210dfaa2720fcad9cbc8ec30fb45ddbabee4bf8 - scripts/bloat-o-meter: ignore _sdata

Mon, 04 May 2026 22:36:05 +0200

scripts/bloat-o-meter: ignore _sdata_sdata is a linker symbol, but bloat-o-meter may consider it as a realvariable:$ scripts/bloat-o-meter vmlinux.orig vmlinuxadd/remove: 7/1 grow/shrink: 0/0 up/down: 3437/-4096 (-659)Function old new deltacrc32table_le - 1024 +1024crc32table_be - 1024 +1024crc32ctable_le - 1024 +1024byte_rev_table - 256 +256crc32_be - 39 +39crc32c - 35 +35crc32_le - 35 +35_sdata 4096 - -4096Total: Before=8592564398, After=8592563739, chg -0.00%With the patch:$ scripts/bloat-o-meter vmlinux.orig vmlinuxadd/remove: 7/0 grow/shrink: 0/0 up/down: 3437/0 (3437)Function old new deltacrc32table_le - 1024 +1024crc32table_be - 1024 +1024crc32ctable_le - 1024 +1024byte_rev_table - 256 +256crc32_be - 39 +39crc32c - 35 +35crc32_le - 35 +35Total: Before=8592560302, After=8592563739, chg +0.00%Link: https://lore.kernel.org/20260504203606.427972-1-ynorov@nvidia.comSigned-off-by: Yury Norov Cc: Valtteri Koskivuori Cc: Eric Dumazet Signed-off-by: Andrew Morton List of files: /linux/scripts/bloat-o-meter

3f80aa1a2a44298c59e8e2ab9b10d9971cfd8c48 - scripts/bloat-o-meter: rename file arguments to match output

Thu, 12 Feb 2026 22:39:33 +0100

scripts/bloat-o-meter: rename file arguments to match outputThe output of bloat-o-meter already uses the words 'old' and 'new' forsymbol size in the table header, so reflect that in the correspondingargument names.Link: https://lkml.kernel.org/r/20260212213941.3984330-1-vkoskiv@gmail.comSigned-off-by: Valtteri Koskivuori Signed-off-by: Andrew Morton List of files: /linux/scripts/bloat-o-meter

cc20650a096370469919be0eb3b041fc5aa47b39 - scripts/bloat-o-meter: ignore __noinstr_text_start

Sat, 17 Jan 2026 09:34:47 +0100

scripts/bloat-o-meter: ignore __noinstr_text_start__noinstr_text_start is adding noise to the script, ignore it.For instance using __always_inline on __skb_incr_checksum_unnecessary andCC=clang build.Before this patch, __noinstr_text_start can show up and confuse us.$ scripts/bloat-o-meter -t vmlinux.old vmlinux.newadd/remove: 0/2 grow/shrink: 3/0 up/down: 212/-206 (6)Function old new deltatcp6_gro_complete 208 283 +75tcp4_gro_complete 376 449 +73__noinstr_text_start 3536 3600 +64__pfx___skb_incr_checksum_unnecessary 32 - -32__skb_incr_checksum_unnecessary 174 - -174Total: Before=25509464, After=25509470, chg +0.00%After this patch we have a more precise result.$ scripts/bloat-o-meter -t vmlinux.old vmlinux.newadd/remove: 0/2 grow/shrink: 2/0 up/down: 148/-206 (-58)Function old new deltatcp6_gro_complete 208 283 +75tcp4_gro_complete 376 449 +73__pfx___skb_incr_checksum_unnecessary 32 - -32__skb_incr_checksum_unnecessary 174 - -174Total: Before=25505928, After=25505870, chg -0.00%Link: https://lkml.kernel.org/r/20260117083448.3877418-1-edumazet@google.comSigned-off-by: Eric Dumazet Signed-off-by: Andrew Morton List of files: /linux/scripts/bloat-o-meter

198430f7f785e072d5d70fe522b6c7abdf41068a - scripts/bloat-o-meter: count weak symbol sizes

Wed, 16 Aug 2023 17:33:34 +0200

scripts/bloat-o-meter: count weak symbol sizesCurrently, bloat-o-meter does not take into account weak symbols, andthus 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.beSigned-off-by: Geert Uytterhoeven Cc: Arnd Bergmann Signed-off-by: Andrew Morton List of files: /linux/scripts/bloat-o-meter

0371ba6f2327ad63ff559244a9693fcdbfed1388 - scripts/bloat-o-meter: use the reverse flag for sort

Fri, 06 Jan 2023 10:13:19 +0100

scripts/bloat-o-meter: use the reverse flag for sortThe sort function has the inbuilt reversal option. We can use it to savesome time.Link: https://lkml.kernel.org/r/20230106091319.3824-1-apantykhin@gmail.comSigned-off-by: Alexander Pantyukhin Cc: Nikolay Borisov Cc: Paul Gortmaker Signed-off-by: Andrew Morton List of files: /linux/scripts/bloat-o-meter

8b5db6679807fd0ab1154375ea6e5aa6b11c4350 - scripts/bloat-o-meter: add -p argument

Fri, 01 Jul 2022 13:35:13 +0200

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

b62eb2731e17e83c32e1a6089b4463da1a75e66e - scripts/bloat-o-meter: switch argument parsing to using argparse

Fri, 01 Jul 2022 13:35:12 +0200

scripts/bloat-o-meter: switch argument parsing to using argparseThis will facilitate further extension to the arguments the script takes. As an added benefit it also produces saner usage output, where mutualexclusivity of the c|d|t parameters is clearly visible:./scripts/bloat-o-meter -husage: bloat-o-meter [-h] [-c | -d | -t] file1 file2Simple script used to compare the symbol sizes of 2 object filespositional arguments: file1 First file to compare file2 Second file to compareoptional 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 SectionLink: https://lkml.kernel.org/r/20220701113513.1938008-1-nborisov@suse.comSigned-off-by: Nikolay Borisov Signed-off-by: Andrew Morton List of files: /linux/scripts/bloat-o-meter

dec81a532027a77bd52f9bd8d8b3230843533d3f - scripts/bloat-o-meter: filter out vermagic as it is not relevant

Fri, 29 Apr 2022 23:37:57 +0200

scripts/bloat-o-meter: filter out vermagic as it is not relevantSeeing 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 +20Since it really doesn't "grow", it makes sense to filter it out.Link: https://lkml.kernel.org/r/20220428035824.7934-1-paul.gortmaker@windriver.comSigned-off-by: Paul Gortmaker Signed-off-by: Andrew Morton List of files: /linux/scripts/bloat-o-meter

51839e29cb5954470ea4db7236ef8c3d77a6e0bb - scripts: switch explicitly to Python 3

Wed, 09 Dec 2020 12:50:17 +0100

scripts: switch explicitly to Python 3Some distributions are about to switch to Python 3 support only.This means that /usr/bin/python, which is Python 2, is not availableanymore. Hence, switch scripts to use Python 3 explicitly.Signed-off-by: Andy Shevchenko Signed-off-by: Masahiro Yamada List of files: /linux/scripts/bloat-o-meter

c25ce589dca10d64dde139ae093abc258a32869c - tweewide: Fix most Shebang lines

Mon, 23 Nov 2020 15:15:33 +0100

tweewide: Fix most Shebang linesChange 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 List of files: /linux/scripts/bloat-o-meter

1d35b6054a9b94b48511e23a7fab6cd1dbf3fde6 - scripts/bloat-o-meter: Support comparing library archives

Fri, 07 Aug 2020 08:17:32 +0200

scripts/bloat-o-meter: Support comparing library archivesLibrary archives (.a) usually contain multiple object files so theiroutput of nm --size-sort contains lines like:00000000000003a8 t run_testextent-map-tests.o:bloat-o-meter currently doesn't handle them which results in errors whencalling .split() on them. Fix this by simply ignoring them. This enablesdiffing 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.comSigned-off-by: Linus Torvalds List of files: /linux/scripts/bloat-o-meter

e0b2475a3f36a7a0a001fe552145055da1daf245 - bloat-o-meter: ignore __addressable_ symbols

Fri, 28 Dec 2018 09:31:18 +0100

bloat-o-meter: ignore __addressable_ symbolsSince __LINE__ is part of the symbol created by __ADDRESSABLE, almostany 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 - -8trace_default_header 663 642 -21tracing_mark_raw_write 406 355 -51tracing_mark_write 624 557 -67Total: Before=63889, After=63750, chg -0.22%They're small and in .discard, so ignore them, leading to more usefuladd/remove: 0/0 grow/shrink: 0/3 up/down: 0/-139 (-139)Function old new deltatrace_default_header 663 642 -21tracing_mark_raw_write 406 355 -51tracing_mark_write 624 557 -67Total: Before=63721, After=63582, chg -0.22%Link: http://lkml.kernel.org/r/20181102210030.8383-1-linux@rasmusvillemoes.dkSigned-off-by: Rasmus Villemoes Reviewed-by: Andy Shevchenko Cc: Alexey Dobriyan Cc: Ingo Molnar Cc: Dominik Brodowski Cc: Maninder Singh Cc: Matteo Croce Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux/scripts/bloat-o-meter

5ac9efa3c50d7caff9f3933bb8a3ad1139d92d92 - syscalls/core, syscalls/x86: Clean up compat syscall stub naming convention

Mon, 09 Apr 2018 12:51:43 +0200

syscalls/core, syscalls/x86: Clean up compat syscall stub naming conventionTidy the naming convention for compat syscall subs. Hints which describethe purpose of the stub go in front and receive a double underscore todenote that they are generated on-the-fly by the COMPAT_SYSCALL_DEFINEx()macro.For the generic case, this means:t kernel_waitid # common C function (see kernel/exit.c) __do_compat_sys_waitid # inlined helper doing the actual work # (takes original parameters as declared)T __se_compat_sys_waitid # sign-extending C function calling inlined # helper (takes parameters of type long, # casts them to unsigned long and then to # the declared type)T compat_sys_waitid # alias to __se_compat_sys_waitid() # (taking parameters as declared), to # be included in syscall tableFor x86, the naming is as follows:t kernel_waitid # common C function (see kernel/exit.c) __do_compat_sys_waitid # inlined helper doing the actual work # (takes original parameters as declared)t __se_compat_sys_waitid # sign-extending C function calling inlined # helper (takes parameters of type long, # casts them to unsigned long and then to # the declared type)T __ia32_compat_sys_waitid # IA32_EMULATION 32-bit-ptregs -> C stub, # calls __se_compat_sys_waitid(); to be # included in syscall tableT __x32_compat_sys_waitid # x32 64-bit-ptregs -> C stub, calls # __se_compat_sys_waitid(); to be included # in syscall tableIf only one of IA32_EMULATION and x32 is enabled, __se_compat_sys_waitid()may be inlined into the stub __{ia32,x32}_compat_sys_waitid().Suggested-by: Ingo Molnar Signed-off-by: Dominik Brodowski Cc: Al Viro Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/20180409105145.5364-3-linux@dominikbrodowski.netSigned-off-by: Ingo Molnar List of files: /linux/scripts/bloat-o-meter

e145242ea0df6b7d28fd7186e61d6840fa4bb06e - syscalls/core, syscalls/x86: Clean up syscall stub naming convention

Mon, 09 Apr 2018 12:51:42 +0200

syscalls/core, syscalls/x86: Clean up syscall stub naming conventionTidy the naming convention for compat syscall subs. Hints which describethe purpose of the stub go in front and receive a double underscore todenote that they are generated on-the-fly by the SYSCALL_DEFINEx() macro.For the generic case, this means (0xffffffff prefix removed): 810f08d0 t kernel_waitid # common C function (see kernel/exit.c) __do_sys_waitid # inlined helper doing the actual work # (takes original parameters as declared) 810f1aa0 T __se_sys_waitid # sign-extending C function calling inlined # helper (takes parameters of type long; # casts them to the declared type) 810f1aa0 T sys_waitid # alias to __se_sys_waitid() (taking # parameters as declared), to be included # in syscall tableFor x86, the naming is as follows: 810efc70 t kernel_waitid # common C function (see kernel/exit.c) __do_sys_waitid # inlined helper doing the actual work # (takes original parameters as declared) 810efd60 t __se_sys_waitid # sign-extending C function calling inlined # helper (takes parameters of type long; # casts them to the declared type) 810f1140 T __ia32_sys_waitid # IA32_EMULATION 32-bit-ptregs -> C stub, # calls __se_sys_waitid(); to be included # in syscall table 810f1110 T sys_waitid # x86 64-bit-ptregs -> C stub, calls # __se_sys_waitid(); to be included in # syscall tableFor x86, sys_waitid() will be re-named to __x64_sys_waitid in a follow-uppatch.Suggested-by: Ingo Molnar Signed-off-by: Dominik Brodowski Cc: Al Viro Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/20180409105145.5364-2-linux@dominikbrodowski.netSigned-off-by: Ingo Molnar List of files: /linux/scripts/bloat-o-meter

61fc470814d8a7d4a476fd1c0234eeaaf893bda1 - scripts/bloat-o-meter: fix typos in help

Wed, 14 Feb 2018 18:47:18 +0100

scripts/bloat-o-meter: fix typos in helpThe bloat-o-meter script has two typos in the help, fix both.Fixes: 192efb7a1f9b ("bloat-o-meter: provide 3 different arguments for data, function and All")Signed-off-by: Matteo Croce Acked-by: Randy Dunlap Signed-off-by: Masahiro Yamada List of files: /linux/scripts/bloat-o-meter

edbddb83a15b4361d8c3bf00aabee85fd3ef4d80 - scripts/bloat-o-meter: don't fail with division by 0

Thu, 30 Nov 2017 01:11:05 +0100

scripts/bloat-o-meter: don't fail with division by 0Under some circumstances it's possible to get a divider 0 which crashesthe script. Traceback (most recent call last): File "linux/scripts/bloat-o-meter", line 98, in print_result("Function", "tTdDbBrR", 2) File "linux/scripts/bloat-o-meter", line 87, in print_result (otot, ntot, (ntot - otot)*100.0/otot)) ZeroDivisionError: float division by zeroHide this by checking the divider first.Link: http://lkml.kernel.org/r/20171123171219.31453-1-andriy.shevchenko@linux.intel.comSigned-off-by: Andy Shevchenko Cc: Alexey Dobriyan Cc: Vaneet Narang Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux/scripts/bloat-o-meter

192efb7a1f9b69ce2ec1212ee8c24fb9b4a80a35 - bloat-o-meter: provide 3 different arguments for data, function and All

Thu, 16 Nov 2017 02:31:14 +0100

bloat-o-meter: provide 3 different arguments for data, function and AllThis patch provides 3 new arguments for bloat-o-meter 1) -c -> for all (showing function and data differently) 2) -d -> data 3) -t -> functionoutput: ./scripts/bloat-o-meter -c "file1" "file2" add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-152 (-152) Function old new delta main 412 260 -152 Total: Before=548, After=396, chg -27.74% ########################################################## add/remove: 1/0 grow/shrink: 1/0 up/down: 84/0 (84) Data old new delta arr - 64 +64 backtrace 60 80 +20 Total: Before=109, After=193, chg +77.06% ########################################################## add/remove: 0/1 grow/shrink: 0/0 up/down: 0/-64 (-64) RO Data old new delta arr 64 - -64 Total: Before=68, After=4, chg -94.12%[maninder1.s@samsung.com: v1 -> v2] Link: http://lkml.kernel.org/r/1506569402-24787-1-git-send-email-maninder1.s@samsung.comLink: http://lkml.kernel.org/r/1506336313-27187-1-git-send-email-maninder1.s@samsung.comSigned-off-by: Vaneet Narang Signed-off-by: Maninder Singh Cc: Amit Sahrawat Cc: Andi Kleen Cc: Michal Marek Cc: Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux/scripts/bloat-o-meter

0d7bbb43641c35390378e951785f2351bc36650a - scripts/bloat-o-meter: compile .NUMBER regex

Tue, 13 Dec 2016 01:40:48 +0100

scripts/bloat-o-meter: compile .NUMBER regexEvery often used regex is better be compiled in Python.Speedup is about ~9.8% (whee!) $ perf stat -r 16 taskset -c 15 ./scripts/bloat-o-meter ../vmlinux-000 ../obj/vmlinux >/dev/null 7.091202853 seconds time elapsed ( +- 0.15% ) +re.compile 6.397564973 seconds time elapsed ( +- 0.34% )Link: http://lkml.kernel.org/r/20161119004417.GB1200@avx2Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux/scripts/bloat-o-meter

3af06fd96aae18561830745880ca6e289053edae - scripts/bloat-o-meter: don't use readlines()

Tue, 13 Dec 2016 01:40:45 +0100

scripts/bloat-o-meter: don't use readlines()readlines() conses whole list before doing anything which is slower forbig object files. Use per line iterator.Speed up is ~2% on "allyesconfig" type of kernel. $ perf stat -r 16 taskset -c 15 ./scripts/bloat-o-meter ../vmlinux-000 ../obj/vmlinux >/dev/null ... Before: 7.247708646 seconds time elapsed ( +- 0.28% ) After: 7.091202853 seconds time elapsed ( +- 0.15% )Link: http://lkml.kernel.org/r/20161119004143.GA1200@avx2Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux/scripts/bloat-o-meter

eef06b82f16c78dc0197e3e9d5b2230647a890ff - scripts/bloat-o-meter: fix SIGPIPE

Thu, 10 Nov 2016 19:46:13 +0100

scripts/bloat-o-meter: fix SIGPIPEFix piping output to a program which quickly exits (read: head -n1) $ ./scripts/bloat-o-meter ../vmlinux-000 ../obj/vmlinux | head -n1 add/remove: 0/0 grow/shrink: 9/60 up/down: 124/-305 (-181) close failed in file object destructor: sys.excepthook is missing lost sys.stderrLink: http://lkml.kernel.org/r/20161028204618.GA29923@avx2Signed-off-by: Alexey Dobriyan Cc: Matt Mackall Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux/scripts/bloat-o-meter