On Tue, Aug 30, 2011 at 11:24:59AM -0500, Zach Pfeffer wrote: > I'd like you to meet Jim who did the initial hardfloat work. This > email contains the results that Jim produced.
Hmm, but the email seems to not actually contain a hard-float run. Or am I misreading what he means by Fixed vs VFP? > 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. You may be confusing things here. Hard-float is a pure software ABI change, and any platform which supports VFP can use it if you build it that way. However, since it is an ABI change it requires that hard-float libraries be available. What /would/ stop code from running on certain platforms is using NEON (it would exclude the Tegra2 and some existing Marvell v7s). But that doesn't seem to be in question here. > ---------- Forwarded message ---------- > From: Jim Huang <js...@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.pfef...@linaro.org> > > > 2011/8/7 Zach Pfeffer <zach.pfef...@linaro.org>: > > Jim, > > > > 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. > > Thanks, > -jserv > _______________________________________________ > linaro-dev mailing list > linaro-dev@lists.linaro.org > http://lists.linaro.org/mailman/listinfo/linaro-dev -- Christian Robottom Reis, Engineering VP Brazil (GMT-3) | [+55] 16 9112 6430 | [+1] 612 216 4935 Linaro.org: Open Source Software for ARM SoCs _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
