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From: Yeongkyoon Lee <yeongkyoon.lee@samsung.com>
To: Blue Swirl <blauwirbel@gmail.com>
Cc: laurent.desnogues@gmail.com, sw@weilnetz.de,
	Richard Henderson <rth@twiddle.net>,
	qemu-devel@nongnu.org, peter.maydell@linaro.org
Subject: Re: [Qemu-devel] [RFC][PATCH v4 3/3] tcg: Optimize qemu_ld/st by generating slow paths at the end of a block
Date: Tue, 28 Aug 2012 15:52:08 +0900	[thread overview]
Message-ID: <503C6A98.7090906@samsung.com> (raw)
In-Reply-To: <CAAu8pHta6XZ0XG6+jqGqa+NUfcS8WiKu2uYEn5ZH9T6gL6VxYw@mail.gmail.com>


>> It's been a long time.
>>
>> I've tested the performances of one jump difference when fast qemu_ld/st
>> (TLB hit).
>> The result shows 3.6% CoreMark enhancement when reducing one jump where slow
>> paths are generated at the end of block as same for the both cases.
>> That means reducing one jump dominates the majority of performance
>> enhancement from LDST_OPTIMIZATION.
>> As a result, it needs extended MMU helper functions for attaining that
>> performance rising, and those extended functions are used only implicitly.
>>
>> BTW, who will finally confirm my patches?
>> I have sent four version of my patches in which I have applied all the
>> reasonable feedbacks from this community.
>> Currently, v4 is the final candidate though it might need merge with latest
>> HEAD because it was sent 1 month before.
> I think the patches should be applied when 1.3 development opens.
>

Thanks for your reply.
How do you estimate when 1.3 development is open?

  reply	other threads:[~2012-08-28  6:51 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-25  7:35 [Qemu-devel] [RFC][PATCH v4 0/3] tcg: enhance code generation quality for qemu_ld/st IRs Yeongkyoon Lee
2012-07-25  7:35 ` [Qemu-devel] [RFC][PATCH v4 1/3] configure: Add CONFIG_QEMU_LDST_OPTIMIZATION for TCG qemu_ld/st optimization Yeongkyoon Lee
2012-07-25  7:35 ` [Qemu-devel] [RFC][PATCH v4 2/3] tcg: Add declarations and templates of extended MMU helpers Yeongkyoon Lee
2012-07-25  7:35 ` [Qemu-devel] [RFC][PATCH v4 3/3] tcg: Optimize qemu_ld/st by generating slow paths at the end of a block Yeongkyoon Lee
2012-07-25 14:00   ` Richard Henderson
2012-07-28 15:39     ` Yeongkyoon Lee
2012-08-27  7:23       ` Yeongkyoon Lee
2012-08-27 18:24         ` Blue Swirl
2012-08-28  6:52           ` Yeongkyoon Lee [this message]
2012-08-28 16:58             ` Blue Swirl
2012-08-27 18:31         ` Peter Maydell
2012-08-28  6:38           ` Yeongkyoon Lee
2012-08-28 17:18           ` Andreas Färber

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