From: Ingo Molnar <mingo@kernel.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
peterz@infradead.org, Andi Kleen <ak@linux.intel.com>,
fweisbec@gmail.com
Subject: Re: [PATCH 6/6] x86: Allow disabling HW_BREAKPOINTS and PERF_EVENTS
Date: Sun, 6 Oct 2013 18:49:34 +0200 [thread overview]
Message-ID: <20131006164934.GA15167@gmail.com> (raw)
In-Reply-To: <1380922788-23112-7-git-send-email-andi@firstfloor.org>
* Andi Kleen <andi@firstfloor.org> wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> As suggested by Ingo.
>
> Make HW_BREAKPOINTS a config option. HW_BREAKPOINTS depends
> on perf. This allows disabling PERF_EVENTS for systems that
> don't need it (e.g. anything not used for development)
>
> Disabling PERF_EVENTS saves over 700k of kernel text (~5% of my config)
> and significant data/bss:
>
> text data bss dec hex filename
> 13692640 1922416 1478656 17093712 104d450 obj/vmlinux
> 12980092 1787544 1470464 16238100 f7c614 obj-noperf/vmlinux
Btw., could you send me your .config so I can investigate this?
Thanks,
Ingo
next prev parent reply other threads:[~2013-10-06 16:49 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-04 21:39 Allow disabling perf on x86 Andi Kleen
2013-10-04 21:39 ` [PATCH 1/6] perf, x86, amd: Move __get_ibs_caps into common amd CPU file Andi Kleen
2013-10-04 21:39 ` [PATCH 2/6] perf, x86: Make perf amd ibs code depend on PERF_EVENTS and SUP_AMD Andi Kleen
2013-10-04 21:39 ` [PATCH 3/6] x86, ptrace: Ifdef HW_BREAKPOINTS code in ptrace Andi Kleen
2013-10-04 21:39 ` [PATCH 4/6] trace: Make UPROBES depend on PERF_EVENTS Andi Kleen
2013-10-05 0:52 ` Steven Rostedt
2013-10-05 3:25 ` Andi Kleen
2013-10-04 21:39 ` [PATCH 5/6] x86, kgdb: Support compiling without hardware break points Andi Kleen
2013-10-04 21:39 ` [PATCH 6/6] x86: Allow disabling HW_BREAKPOINTS and PERF_EVENTS Andi Kleen
2013-10-04 22:27 ` Frederic Weisbecker
2013-10-05 7:08 ` Ingo Molnar
2013-10-05 17:05 ` Andi Kleen
2013-10-08 19:55 ` Frederic Weisbecker
2013-10-08 20:05 ` Peter Zijlstra
2013-10-08 20:34 ` Frederic Weisbecker
2013-10-08 20:35 ` Frederic Weisbecker
2013-10-09 6:02 ` Ingo Molnar
2013-10-06 16:49 ` Ingo Molnar [this message]
2013-10-08 6:59 ` Ingo Molnar
2013-10-08 15:35 ` Steven Rostedt
2013-10-08 19:39 ` Ingo Molnar
2013-10-08 15:42 ` Vince Weaver
2013-10-08 15:51 ` Dave Jones
2013-10-08 16:22 ` David Ahern
2013-10-08 16:24 ` Dave Jones
2013-10-08 19:36 ` Ingo Molnar
2013-10-08 20:19 ` Steven Rostedt
2013-10-09 3:21 ` Andi Kleen
2013-10-09 3:24 ` Andi Kleen
2013-10-09 3:39 ` Andi Kleen
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