From: Miroslav Benes <mbenes@suse.cz>
To: Peter Zijlstra <peterz@infradead.org>
Cc: tglx@linutronix.de, jpoimboe@redhat.com,
linux-kernel@vger.kernel.org, x86@kernel.org,
mhiramat@kernel.org, brgerst@gmail.com
Subject: Re: [PATCH v2 17/19] objtool: Optimize !vmlinux.o again
Date: Fri, 20 Mar 2020 17:20:47 +0100 (CET) [thread overview]
Message-ID: <alpine.LSU.2.21.2003201719200.21240@pobox.suse.cz> (raw)
In-Reply-To: <20200318132025.GH20730@hirez.programming.kicks-ass.net>
On Wed, 18 Mar 2020, Peter Zijlstra wrote:
> On Tue, Mar 17, 2020 at 06:02:51PM +0100, Peter Zijlstra wrote:
> > When doing kbuild tests to see if the objtool changes affected those I
> > found that there was a measurable regression:
> >
> > pre post
> >
> > real 1m13.594 1m16.488s
> > user 34m58.246s 35m23.947s
> > sys 4m0.393s 4m27.312s
> >
> > Perf showed that for small files the increased hash-table sizes were a
> > measurable difference. Since we already have -l "vmlinux" to
> > distinguish between the modes, make it also use a smaller portion of
> > the hash-tables.
> >
> > This flips it into a small win:
> >
> > real 1m14.143s
> > user 34m49.292s
> > sys 3m44.746s
> >
> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
>
> There was one 'elf_' prefixing gone missing. Updated patch below.
I think there is one more missing in create_orc_entry().
Miroslav
next prev parent reply other threads:[~2020-03-20 16:20 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-17 17:02 [PATCH v2 00/19] objtool: vmlinux.o and noinstr validation Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 01/19] objtool: Introduce validate_return() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 02/19] objtool: Rename func_for_each_insn() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 03/19] objtool: Rename func_for_each_insn_all() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 04/19] x86/kexec: Use RIP relative addressing Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 05/19] objtool: Optimize find_symbol_by_index() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 06/19] objtool: Add a statistics mode Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 07/19] objtool: Optimize find_section_by_index() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 08/19] objtool: Optimize find_section_by_name() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 09/19] objtool: Optimize find_symbol_*() and read_symbols() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 10/19] objtool: Rename find_containing_func() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 11/19] objtool: Resize insn_hash Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 12/19] objtool: Optimize find_symbol_by_name() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 13/19] objtool: Optimize read_sections() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 14/19] objtool: Delete cleanup() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 15/19] objtool: Optimize find_rela_by_dest_range() Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 16/19] objtool: Implement noinstr validation Peter Zijlstra
2020-03-17 21:00 ` Josh Poimboeuf
2020-03-18 9:03 ` Peter Zijlstra
2020-03-18 10:06 ` Peter Zijlstra
2020-03-18 13:21 ` Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 17/19] objtool: Optimize !vmlinux.o again Peter Zijlstra
2020-03-18 13:20 ` Peter Zijlstra
2020-03-20 16:20 ` Miroslav Benes [this message]
2020-03-21 15:14 ` Peter Zijlstra
2020-03-21 16:11 ` Peter Zijlstra
2020-03-23 7:27 ` Miroslav Benes
2020-03-17 17:02 ` [PATCH v2 18/19] objtool: Use sec_offset_hash() for insn_hash Peter Zijlstra
2020-03-17 17:02 ` [PATCH v2 19/19] objtool: Detect loading function pointers across noinstr Peter Zijlstra
2020-03-17 23:39 ` kbuild test robot
2020-03-17 23:43 ` Nick Desaulniers
2020-03-18 11:02 ` Peter Zijlstra
2020-03-18 7:18 ` kbuild test robot
2020-03-17 21:05 ` [PATCH v2 00/19] objtool: vmlinux.o and noinstr validation Josh Poimboeuf
2020-03-18 13:18 ` [RFC][PATCH v2 20/19] kbuild/objtool: Add objtool-vmlinux.o pass Peter Zijlstra
2020-03-18 14:13 ` Peter Zijlstra
2020-03-18 18:34 ` Josh Poimboeuf
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