From: Xinliang David Li <davidxl@google.com>
To: Sriraman Tallam <tmsriram@google.com>
Cc: Rong Xu <xur@google.com>, GCC Patches <gcc-patches@gcc.gnu.org>
Subject: Re: [google][4.7] Allow function reordering linker plugin to separate hot and cold code into different ELF segments
Date: Fri, 04 Jan 2013 05:14:00 -0000 [thread overview]
Message-ID: <CAAkRFZ+mKthby=tYCBkmh3vREKSvTu0swHiUJyD+v8UADWmXFA@mail.gmail.com> (raw)
In-Reply-To: <CAAs8HmxS+hKy7CWdhtbp93cRSo6aF5NdVzgOep=yoiYqF2exOA@mail.gmail.com>
Is it better to change the option to something like:
split_segment|nosplit-segment
or split_segment=yes|no
David
On Thu, Jan 3, 2013 at 5:41 PM, Sriraman Tallam <tmsriram@google.com> wrote:
> Hi Rong,
>
> The following patch modifies the behaviour of the linker plugin to
> not create a separate segment for cold sections by default. Separate
> segments can be created with the plugin option "segment=cold". Is this
> alright to commit?
>
> Thanks,
> -Sri.
>
> On Mon, Dec 17, 2012 at 11:14 AM, Sriraman Tallam <tmsriram@google.com> wrote:
>> I have committed this patch.
>>
>> Thanks,
>> -Sri.
>>
>> On Fri, Dec 14, 2012 at 4:16 PM, Rong Xu <xur@google.com> wrote:
>>> Looks good to me for google/gcc-4_7 branch.
>>>
>>> Thanks,
>>>
>>> -Rong
>>>
>>>
>>> On Fri, Dec 14, 2012 at 3:42 PM, Sriraman Tallam <tmsriram@google.com>
>>> wrote:
>>>>
>>>> Hi Rong,
>>>>
>>>> Please review this code. This code allows the function reordering
>>>> plugin to separate hot and cold code into different ELF segments.
>>>> This would allow optimizations like mapping the hot code alone to huge
>>>> pages.
>>>>
>>>> With this patch, by default, the plugin maps .text.unlikely
>>>> sections into a separate ELF segment. This can be turned off with
>>>> plugin option "--segment=none".
>>>>
>>>> The include/plugin-api.h changes are a backport from trunk.
>>>>
>>>> Thanks,
>>>> -Sri.
>>>
>>>
next prev parent reply other threads:[~2013-01-04 5:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-14 23:42 Sriraman Tallam
[not found] ` <CAF1bQ=TFVjwdkhiNAfD3=jSNPu2M3zRZ_OajGNWbmACS=sA82Q@mail.gmail.com>
2012-12-17 19:14 ` Sriraman Tallam
2013-01-04 1:41 ` Sriraman Tallam
2013-01-04 5:14 ` Xinliang David Li [this message]
2013-01-04 17:13 ` Rong Xu
2013-01-04 22:19 ` Sriraman Tallam
2013-01-04 22:32 ` Xinliang David Li
2013-01-05 2:32 ` Sriraman Tallam
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