Would you send me your hard float experiment results you presented in Budapest?
zach.pfeffer at linaro.org
Fri Sep 2 15:58:42 UTC 2011
Including Bero who's looked at this recently.
On 2 September 2011 05:41, David Rusling <david.rusling at linaro.org> wrote:
> you'd need to use multiarch and have multiple installed libraries so that you could support both hard and soft float ABI. Does Android do anything different / interesting in its image / shared library loader(s)?
> On 30 Aug 2011, at 17:24, Zach Pfeffer wrote:
>> I'd like you to meet Jim who did the initial hardfloat work. This
>> email contains the results that Jim produced.
>> I believe that the conclusion was that skia and webkit may benefit,
>> but that such benefits would impose an undue burden on Android's
>> distribution model which tries to create libs that can run on as many
>> architectures as possible.
>> ---------- Forwarded message ----------
>> From: Jim Huang <jserv at 0xlab.org>
>> Date: 7 August 2011 18:01
>> Subject: Re: Would you send me your hard float experiment results you
>> presented in Budapest?
>> To: Zach Pfeffer <zach.pfeffer at linaro.org>
>> 2011/8/7 Zach Pfeffer <zach.pfeffer at linaro.org>:
>>> Thanks. Would it be possible to post them by the end of the day?
>> skia ->
>> Switch from VFP back to fixed scalar based calculation
>> Previous configuration enabled ARM VFP for scalar float, but VFP on
>> ARM11 is not as powerful as VFPv3 or NEON.
>> Reference benchmark:
>> Item Fixed based VFP-based
>> ------------ ----------- ---------
>> Draw Canvas 58.37 fps 58.40 fps
>> Draw Circle 37.48 fps 22.93 fps
>> Draw Circle2 17.14 fps 18.31 fps
>> Draw Rect 17.62 fps 20.69 fps
>> Draw Arc 24.79 fps 27.45 fps
>> Draw Image 19.08 fps 18.73 fps
>> Draw Text 29.22 fps 25.79 fps
>>> Also, have you sync'd up with Mike? He wants to negotiate on your contract.
>> I sent mail to Mike already. I don't know how to proceed.
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