Input latency

[Andreas Pokorny]

Hi,
Can we split the times up? .. decoding from evdev until a EV_SYN ..
internal processing in the shell.. transfer to client?



On Mon, Dec 16, 2013 at 6:52 AM, Daniel van Vugt <
daniel.van.vugt at canonical.com> wrote:

> If I had a theory, I could test if it correlates with the spikes. At the
> moment I don't even have a theory.
>
> The other weird thing I didn't mention was that the "lowlatency" kernel
> has higher latency :). But it was worth a try. As are different kernel
> schedulers, I haven't tried playing with them yet.
>
>
>
> On 13/12/13 18:27, Christopher James Halse Rogers wrote:
>
>> On Fri, 2013-12-13 at 17:31 +0800, Daniel van Vugt wrote:
>>
>>> Here are some fun numbers I've collected about the latency between input
>>> events sent from the top-level Mir server to a client. All in
>>> milliseconds...
>>>
>>> Desktop (3.12.0-7-generic)
>>> Direct 0.8ms
>>> Nested 1.3ms
>>>
>>> Desktop (3.11.0-11-lowlatency)
>>> Direct 1.0ms
>>> Nested 1.7ms
>>>
>>> Nexus4 (3.4.0-3-mako)
>>> Direct 0.9ms
>>> Nested 1.5ms with high variance; frequent spikes to 73ms. Sometimes
>>> 700ms.
>>>
>>
>> Do we have any way to get insight into the spikes? Something strange is
>> obviously happening when the variance is ~3 orders of magnitude.
>>
>>
>>
>>
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