From: Christophe Leroy <christophe.leroy@csgroup.eu> To: Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, naveen.n.rao@linux.vnet.ibm.com Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 06/25] powerpc/ftrace: Inline ftrace_modify_code() Date: Mon, 9 May 2022 07:36:04 +0200 [thread overview] Message-ID: <1597a06d57cfc80e6853838c4066e799bf6c7977.1652074503.git.christophe.leroy@csgroup.eu> (raw) In-Reply-To: <cover.1652074503.git.christophe.leroy@csgroup.eu> Inlining ftrace_modify_code(), it increases a bit the size of ftrace code but brings 5% improvment on ftrace activation. Usually in C files we let gcc decide what to do but here it really help to 'help' gcc to decide to inline, thought we don't want to force it with an __always_inline that would be too much for CONFIG_CC_OPTIMIZE_FOR_SIZE. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> --- v2: More explanation in commit message --- arch/powerpc/kernel/trace/ftrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c index 41c45b9c7f39..98e82fa4980f 100644 --- a/arch/powerpc/kernel/trace/ftrace.c +++ b/arch/powerpc/kernel/trace/ftrace.c @@ -53,7 +53,7 @@ ftrace_call_replace(unsigned long ip, unsigned long addr, int link) return op; } -static int +static inline int ftrace_modify_code(unsigned long ip, ppc_inst_t old, ppc_inst_t new) { ppc_inst_t replaced; -- 2.35.1
WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu> To: Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, naveen.n.rao@linux.vnet.ibm.com Cc: Christophe Leroy <christophe.leroy@csgroup.eu>, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v3 06/25] powerpc/ftrace: Inline ftrace_modify_code() Date: Mon, 9 May 2022 07:36:04 +0200 [thread overview] Message-ID: <1597a06d57cfc80e6853838c4066e799bf6c7977.1652074503.git.christophe.leroy@csgroup.eu> (raw) In-Reply-To: <cover.1652074503.git.christophe.leroy@csgroup.eu> Inlining ftrace_modify_code(), it increases a bit the size of ftrace code but brings 5% improvment on ftrace activation. Usually in C files we let gcc decide what to do but here it really help to 'help' gcc to decide to inline, thought we don't want to force it with an __always_inline that would be too much for CONFIG_CC_OPTIMIZE_FOR_SIZE. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> --- v2: More explanation in commit message --- arch/powerpc/kernel/trace/ftrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c index 41c45b9c7f39..98e82fa4980f 100644 --- a/arch/powerpc/kernel/trace/ftrace.c +++ b/arch/powerpc/kernel/trace/ftrace.c @@ -53,7 +53,7 @@ ftrace_call_replace(unsigned long ip, unsigned long addr, int link) return op; } -static int +static inline int ftrace_modify_code(unsigned long ip, ppc_inst_t old, ppc_inst_t new) { ppc_inst_t replaced; -- 2.35.1
next prev parent reply other threads:[~2022-05-09 5:41 UTC|newest] Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-05-09 5:35 [PATCH v3 00/25] powerpc: ftrace optimisation and cleanup and more [v3] Christophe Leroy 2022-05-09 5:35 ` Christophe Leroy 2022-05-09 5:35 ` [PATCH v3 01/25] powerpc/ftrace: Refactor prepare_ftrace_return() Christophe Leroy 2022-05-09 5:35 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 02/25] powerpc/ftrace: Remove redundant create_branch() calls Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 03/25] powerpc/code-patching: Inline is_offset_in_{cond}_branch_range() Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 04/25] powerpc/ftrace: Use is_offset_in_branch_range() Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 05/25] powerpc/code-patching: Inline create_branch() Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy [this message] 2022-05-09 5:36 ` [PATCH v3 06/25] powerpc/ftrace: Inline ftrace_modify_code() Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 07/25] powerpc/ftrace: Use patch_instruction() return directly Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 08/25] powerpc: Add CONFIG_PPC64_ELF_ABI_V1 and CONFIG_PPC64_ELF_ABI_V2 Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 09/25] powerpc: Replace PPC64_ELF_ABI_v{1/2} by CONFIG_PPC64_ELF_ABI_V{1/2} Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 10/25] powerpc: Finalise cleanup around ABI use Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 11/25] powerpc/ftrace: Make __ftrace_make_{nop/call}() common to PPC32 and PPC64 Christophe Leroy 2022-08-08 18:41 ` Nick Desaulniers 2022-08-08 18:41 ` Nick Desaulniers 2022-05-09 5:36 ` Christophe Leroy 2022-08-08 18:47 ` Nick Desaulniers 2022-08-08 18:47 ` Nick Desaulniers 2022-08-09 6:25 ` Naveen N. Rao 2022-08-09 6:25 ` Naveen N. Rao 2022-05-09 5:36 ` [PATCH v3 12/25] powerpc/ftrace: Don't include ftrace.o for CONFIG_FTRACE_SYSCALLS Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 13/25] powerpc/ftrace: Use CONFIG_FUNCTION_TRACER instead of CONFIG_DYNAMIC_FTRACE Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 14/25] powerpc/ftrace: Remove ftrace_plt_tramps[] Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 15/25] powerpc/ftrace: Use BRANCH_SET_LINK instead of value 1 Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 16/25] powerpc/ftrace: Use PPC_RAW_xxx() macros instead of opencoding Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 17/25] powerpc/ftrace: Use size macro " Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 18/25] powerpc/ftrace: Simplify expected_nop_sequence() Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 19/25] powerpc/ftrace: Minimise number of #ifdefs Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-18 9:45 ` Naveen N. Rao 2022-05-18 9:45 ` Naveen N. Rao 2022-05-18 10:08 ` Christophe Leroy 2022-05-18 10:08 ` Christophe Leroy 2022-05-18 11:19 ` Michael Ellerman 2022-05-18 11:19 ` Michael Ellerman 2022-05-18 12:03 ` Michael Ellerman 2022-05-18 12:03 ` Michael Ellerman 2022-05-18 12:12 ` Christophe Leroy 2022-05-18 12:12 ` Christophe Leroy 2022-05-18 17:03 ` Naveen N. Rao 2022-05-18 17:03 ` Naveen N. Rao 2022-05-18 12:04 ` Christophe Leroy 2022-05-18 12:04 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 20/25] powerpc/inst: Add __copy_inst_from_kernel_nofault() Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 21/25] powerpc/ftrace: Don't use copy_from_kernel_nofault() in module_trampoline_target() Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 22/25] powerpc/inst: Remove PPC_INST_BRANCH Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 23/25] powerpc/modules: Use PPC_LI macros instead of opencoding Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 24/25] powerpc/inst: Remove PPC_INST_BL Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-09 5:36 ` [PATCH v3 25/25] powerpc/opcodes: Remove unused PPC_INST_XXX macros Christophe Leroy 2022-05-09 5:36 ` Christophe Leroy 2022-05-24 11:09 ` [PATCH v3 00/25] powerpc: ftrace optimisation and cleanup and more [v3] Michael Ellerman
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