Re: Flash 10.1 uses 90%+ CPU

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On 06/11/2010 03:16 PM, Clodoaldo Neto wrote:
> 2010/6/11 Andrew Haley <aph@xxxxxxxxxx>:
>> On 06/11/2010 01:01 PM, Clodoaldo Neto wrote:
>>> 2010/6/11 Andrew Haley <aph@xxxxxxxxxx>:
>>>> On 06/11/2010 11:40 AM, Clodoaldo Neto wrote:
>>>>> For me Flash 10.1 CPU utilization is very intense. Some videos have
>>>>> many dropped frames. Right now this is almost unwatchable with more
>>>>> than 95% CPU utilization:
>>>>>
>>>>> http://worldcup.vevo.com/
>>>>
>>>> This is H.264 video, which is notoriously CPU intensive to decode.
>>>> The new generation of computer/GPU hardware is being designed to do
>>>> this with dedicated peripherals, but the flashplayer you have won't
>>>> use that.  Also, the built-in decoder in flashplayer might not be as
>>>> fast as it could be.
>>>
>>> My point, which I neglected to post, is that with the previous Flash
>>> version, 10.0, the CPU utilization was 20% at the most demanding
>>> videos
>>
>> That certainly is not my experience.  H.264 will stretch almost any
>> processor, and in HD is beyond the capabilities of even the newest
>> single core.  20% CPU utilization is pretty reasonable for MPEG
>> decoding, though.  I don't know what you might have tried in the past.
>>
>>> and with 10.1 it is unusable for some videos. My desktop CPU is an
>>> AMD 2.2 GHz. Not very impressive, but also not that ancient.
>>
>> Well, the question is whether you can do better with an older
>> flashplayer and *that particular video*, which seems to be SD
>> widescreen.
> 
> Yes. I was watching that video just before the upgrade to 10.1 and it
> was completely smooth. And then right after that I went to watch it
> again and it was dropping lots of frames.

Sigh.  You know, if you'd said that at the start we could have avoided
this whole exchange.  :-(

> The other videos I watch regularly are the CNN videos. Although they
> are still smooth, now the CPU utilization is much higher, more than
> 80%.
> 
> Are you using Fedora? What version of the Flash plugin? What is your
> CPU utilization playing that video? What is the CPU?

Yes, 10.0.x, 90+% on all CPUs, but quality varies.

I have no idea how you ever managed to decode that video at such low CPU
utilization.  Maybe you get a different version from the server depending 
on which version of flashplayer you have.

Andrew.
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