That will also be the result of the scaling governor. I was surprised too that arale (Meizu) only has an interactive governor available. It's quite hard to measure performance consistently and effectively with such a governor (specially for comparison purposes).
>I'm more concerned about how can we keep phone graphics performing as well as they do during touches, even when we're not touching them? I don't think there's escaping the fact that we will need to tune the governor to match the Ubuntu workload. On Fri, Aug 14, 2015 at 3:55 AM, Daniel van Vugt < daniel.van.v...@canonical.com> wrote: > It's not just frequency either. On arale (Meizu) for example, smoothness > correlates directly with whether multiple CPU cores are online or not: > > cat /sys/devices/system/cpu/online > > Usually the kernel only keeps one core online, which makes Unity8 stutter. > But if you touch it enough then the second core (out of eight) comes online > and everything is smooth. I wonder if more aggressive use of threads might > help... > > > > On 14/08/15 16:48, Daniel van Vugt wrote: > >> Hi all, >> >> In testing performance optimisations on various phones, I keep running >> into an annoying hurdle. >> >> Although you can optimise your Mir server/clients in such a way that >> they're smoother more often, there's an additional variable outside of >> Mir and Unity that gets in the way. That seems to be frequency scaling >> done by the kernel. Sometimes on desktops too, but I'm mostly concerned >> about phones here. >> >> I find it suspicious that on some devices you can turn stuttering into >> smoothness just but touching the screen a lot. But the smoothness soon >> goes away when you're not touching the screen. In the extreme case, if >> you're logged into the phone remotely you will also notice the system >> can become unusably slow when the screen has turned off. That's useful >> for a real phone's battery life, but it serves to illustrate that the >> kernel is doing a lot behind the scenes. I'm more concerned about how >> can we keep phone graphics performing as well as they do during touches, >> even when we're not touching them? >> >> - Daniel >> >> > -- > Unitymirteam mailing list > unitymirt...@lists.canonical.com > Modify settings or unsubscribe at: > https://lists.canonical.com/mailman/listinfo/unitymirteam >
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