[Spice-devel] spice-gtk client video streaming , strange stuff on different hardware

[Hans de Goede]

Hi,

On 08/14/2012 03:35 PM, nicolas prochazka wrote:
> hello,
> this problem is correct by update to libjpeg-turbo 1.2.1
>
> libjepg-turbo changelog
>
> [5] Worked around a severe performance issue with "Bobcat" (AMD Embedded APU)
> 34	processors.  The MASKMOVDQU instruction, which was used by the libjpeg-turbo
> 35	SSE2 SIMD code, is apparently implemented in microcode on AMD processors, and
> 36	it is painfully slow on Bobcat processors in particular.  Eliminating the use
> 37	of this instruction improved performance by an order of magnitude on Bobcat
> 38	processors and by a small amount (typically 5%) on AMD desktop processors.

Thanks for letting us know, that is great news! Since F-17 has libjpeg-turbo 1.2.1
available as an update,  I've closed the corresponding Fedora bug:
https://bugzilla.redhat.com/show_bug.cgi?id=827381

Regards,

Hans


>
> Regards,
> Nicolas
>
> 2012/8/1 nicolas prochazka <prochazka.nicolas at gmail.com>:
>> hello again,
>> I've do these tests and I obtain the same result.
>> spicy gtk2  cairo backend
>> spicy gtk3 cairo bachend
>> spicy gtk2 x11 backend
>>
>> Nicolas
>>
>> 2012/8/1 nicolas prochazka <prochazka.nicolas at gmail.com>:
>>> hello,
>>> I also tests with wyse Z90 which include AMD APU 52R ,
>>> the performance are good , just limited by cpu performance.
>>>
>>> The strange stuff seems that spicy seems to do different thing on this
>>> hardware (log) , compare to all other harware client I've tested.
>>> spicy runs on my own distribution based on gentoo.
>>>
>>>
>>> Regards,
>>> Nicolas
>>>
>>>
>>> 2012/7/31 Hans de Goede <hdegoede at redhat.com>
>>>>
>>>> Hi,
>>>>
>>>>
>>>> On 07/31/2012 11:11 AM, nicolas prochazka wrote:
>>>>>
>>>>> Hello,
>>>>> I'm using spice-gtk ( ver 0.12) with a lot of diferrents hardware (
>>>>> cpu, network card ... ) and video streaming is often good.
>>>>> But with this one ( HP t610 , with amd T56N processsor ) video
>>>>> streaming is not working.
>>>>> Theses tests have done in the same conditions ( same network, same
>>>>> video , test with different spicy version )
>>>>
>>>>
>>>> This sound like exactly the same issue as this one:
>>>> https://bugzilla.redhat.com/show_bug.cgi?id=827381
>>>>
>>>> It seems that there is something in the Fedora-17 xorg / gtk
>>>> stack which makes spice video performance bad on AMD brazos APU-s
>>>>
>>>> Regards,
>>>>
>>>> Hans