From: Alex Shi <alex.shi@intel.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: jeremy@goop.org,
"asit.k.mallick@intel.com" <asit.k.mallick@intel.com>,
"x86@kernel.org" <x86@kernel.org>,
tglx@linutronix.de, Andi Kleen <ak@linux.intel.com>,
"mingo@redhat.com" <mingo@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"hpa@zytor.com" <hpa@zytor.com>
Subject: Re: [RFC patch] cmpxchg_double: remove local variables to get better performance
Date: Sat, 03 Mar 2012 14:03:17 +0800 [thread overview]
Message-ID: <4F51B425.7090805@intel.com> (raw)
In-Reply-To: <4F50F594020000780007612D@nat28.tlf.novell.com>
On 03/02/2012 11:30 PM, Jan Beulich wrote:
>>>> On 02.03.12 at 16:12, Alex Shi <alex.shi@intel.com> wrote:
>> On 03/02/2012 05:11 PM, Jan Beulich wrote:
>>> In particular, requiring an L suffix here on literals should be avoided.
>>
>>
>> Even the each macro may save 0x40 bytes text, and bring more 10%
>> execution speed?
>
> Again - if you see meaningful text size differences with optimization
> properly enabled, this may need investigation at the compiler end.
Yes, you are right.
I take back this patch.
>
> Jan
>
prev parent reply other threads:[~2012-03-03 6:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-02 8:31 [RFC patch] cmpxchg_double: remove local variables to get better performance Alex Shi
2012-03-02 8:54 ` Jan Beulich
2012-03-02 9:00 ` Alex Shi
2012-03-02 9:11 ` Jan Beulich
2012-03-02 15:12 ` Alex Shi
2012-03-02 15:30 ` Jan Beulich
2012-03-03 6:03 ` Alex Shi [this message]
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