RK3188 tablet upgrade SDK2.0 platform analysis of retinal
Fluency new platform has been improved, more direct reason is the GPU frequency stabilized at a high level china android tablet. In SDK2.0 before, RK3188 tablet's GPU is often just in the running 600MHz timeshare highest level, including the sliding screen and play games, and other occasions are locked in maximum 400MHz (See specific author had on the relevant product evaluation article) . As a direct impact on the GPU, in response to the level of 2024 1536 retina display products, lower GPU frequency is bound to cause relatively large sliding fluency restrictions.
Another big reason is that there is limited memory bandwidth, since a single on the performance of the CPU, 1.6GHz frequency quad-core A9 is quite strong, but the 32bit Single Channel DDR3 bandwidth limits the performance of the CPU to play. Just like a car driving on the narrow muddy road, like not showing its power. P98HD before and after the upgrade, RAM are maintained at 528MHz, which has also been available when RK3188 earliest memory frequency setting. Of course, now there are models slightly improved memory frequency to 600MHz, but I do not have such a product, or in this case Taipower. In fact, even to upgrade to 600MHz, the actual upgrade will not be too small.
RK3188 memory for single-channel 32bit DDR3, theoretical bandwidth of the machine 0.528 32/82 = 4.224GB / s, the actual effective bandwidth available to smaller than this will be a lot. As we all know, domestic retinal flat screen configuration is an imit! ation of the new iPad from. But Apple iPad 3's 4 32bit LPDDR2-800 memory bandwidth of 12.8GB / s, even so in some cases iPad 3 fluency is still subject to criticism. Apple's latest iPad 4 so the memory upgrade for the 4 32bit of LPDDR2-1066, bandwidth is a staggering 17.056GB / s. iPad high memory bandwidth on a mobile platform is basically second to none, for the retina screen required under tremendous throughput calculation per second, this is the most solid guarantee, so even equipped with twice the memory capacity for iPad, still unable to resolve this limitation. And that was not the older ARM Mali-400MP4 with the iPad 3 SGX543MP4, iPad 4 of SGX554MP4 GPU high-performance gap between, RK3188 594MHz for the GPU processing power under about 23.76GFLOPS, iPad 3's 250MHz GPU is 36GFLOPS , iPad 4 of 280MHz GPU is 80.64GPLOPS (this data may not be entirely accurate). GPU bandwidth bottlenecks and performance constraints, and many others including RK3188 CPU you really ! want to drive smoothly retina screen still has tremendous pressure.
Life, did not re-do the test before the upgrade, Taipower P98HD endurance performance is actually relatively good, full HD video playback can last eight half-hour. Monitoring only a moment after the upgrade standby performance, standby 16 hours down 3% to 5%, the performance is also good.
In Rockchip RK3188 upgrade SDK2.0 after, before, fluency underperforming retinal flat indeed been significantly improved, better than a lot of experience, some other details have changed. But we must see, due to hardware limitations in itself, and not through the many aspects of software debugging to completely reversed, equipped with Retina screen RK3188 tablet after the upgrade, to achieve smooth writing experience effects from still not a small gap. But for Rockchip in system optimization of continuous efforts, or worthy of recognition.