From: "Thomas Weißschuh" <linux@weissschuh.net>
To: Josh Poimboeuf <jpoimboe@kernel.org>,
Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, "Thomas Weißschuh" <linux@weissschuh.net>
Subject: [PATCH v2 6/8] objtool: optimize layout of struct symbol
Date: Tue, 27 Dec 2022 16:01:02 +0000 [thread overview]
Message-ID: <20221216-objtool-memory-v2-6-17968f85a464@weissschuh.net> (raw)
In-Reply-To: <20221216-objtool-memory-v2-0-17968f85a464@weissschuh.net>
Reduce the size of struct symbol on x86_64 from 208 to 200 bytes.
This structure is allocated a lot and never freed.
This reduces maximum memory usage while processing vmlinux.o from
2919716 KB to 2917988 KB (-0.5%) on my notebooks "localmodconfig".
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
---
tools/objtool/include/objtool/elf.h | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/tools/objtool/include/objtool/elf.h b/tools/objtool/include/objtool/elf.h
index 2b5becad5a0a..f41573ff1f8b 100644
--- a/tools/objtool/include/objtool/elf.h
+++ b/tools/objtool/include/objtool/elf.h
@@ -50,12 +50,11 @@ struct symbol {
GElf_Sym sym;
struct section *sec;
char *name;
- unsigned int idx;
- unsigned char bind, type;
+ unsigned int idx, len;
unsigned long offset;
- unsigned int len;
unsigned long __subtree_last;
struct symbol *pfunc, *cfunc, *alias;
+ unsigned char bind, type;
u8 uaccess_safe : 1;
u8 static_call_tramp : 1;
u8 retpoline_thunk : 1;
--
2.39.0
next prev parent reply other threads:[~2022-12-27 16:03 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-27 16:00 [PATCH v2 0/8] reduce maximum memory usage Thomas Weißschuh
2022-12-27 16:00 ` [PATCH v2 1/8] objtool: make struct entries[] static and const Thomas Weißschuh
2023-02-01 16:26 ` [tip: objtool/core] objtool: Make " tip-bot2 for Thomas Weißschuh
2023-02-04 10:17 ` tip-bot2 for Thomas Weißschuh
2022-12-27 16:00 ` [PATCH v2 2/8] objtool: make struct check_options static Thomas Weißschuh
2023-02-01 16:26 ` [tip: objtool/core] objtool: Make " tip-bot2 for Thomas Weißschuh
2023-02-04 10:17 ` tip-bot2 for Thomas Weißschuh
2022-12-27 16:00 ` [PATCH v2 3/8] objtool: allocate multiple structures with calloc() Thomas Weißschuh
2023-01-30 23:53 ` Josh Poimboeuf
2023-02-01 16:26 ` [tip: objtool/core] objtool: Allocate " tip-bot2 for Thomas Weißschuh
2023-02-04 10:17 ` tip-bot2 for Thomas Weißschuh
2022-12-27 16:01 ` [PATCH v2 4/8] objtool: introduce function elf_reloc_set_type Thomas Weißschuh
2022-12-27 16:01 ` [PATCH v2 5/8] objtool: reduce memory usage of struct reloc Thomas Weißschuh
2022-12-29 1:33 ` Rong Tao
2022-12-29 2:26 ` Thomas Weißschuh
2022-12-29 3:29 ` Rong Tao
2022-12-29 5:57 ` Thomas Weißschuh
2023-01-30 23:59 ` Josh Poimboeuf
2022-12-27 16:01 ` Thomas Weißschuh [this message]
2023-02-01 16:26 ` [tip: objtool/core] objtool: Optimize layout of struct symbol tip-bot2 for Thomas Weißschuh
2023-02-04 10:17 ` tip-bot2 for Thomas Weißschuh
2022-12-27 16:01 ` [PATCH v2 7/8] objtool: optimize layout of struct special_alt Thomas Weißschuh
2023-02-01 16:26 ` [tip: objtool/core] objtool: Optimize " tip-bot2 for Thomas Weißschuh
2023-02-04 10:17 ` tip-bot2 for Thomas Weißschuh
2022-12-27 16:01 ` [PATCH v2 8/8] objtool: explicitly cleanup resources on success Thomas Weißschuh
2023-01-31 0:02 ` Josh Poimboeuf
2023-01-29 21:43 ` [PATCH v2 0/8] objtool: reduce maximum memory usage Thomas Weißschuh
2023-01-31 0:03 ` Josh Poimboeuf
2023-01-31 3:54 ` Thomas Weißschuh
2023-01-31 17:27 ` Josh Poimboeuf
2023-02-07 17:30 ` Josh Poimboeuf
2023-02-01 12:51 ` David Laight
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