On 01/27/2010 09:11 PM, Stéphane Letz wrote:
>
> Le 27 janv. 2010 à 21:02, Jörn Nettingsmeier a écrit :
>
>> On 01/27/2010 08:39 PM, alex stone wrote:
>>
>>> It's been a good day, and i've enjoyed the stability. I used jack1
>>> before, because it gave me fewer challenges, xruns and occasional pops
>>> and spits, than jack2, which i ended up having to ease out to
>>> 48000/512/3, to reach near the same performance. (i'm on 48000/256/3
>>> with jack1)
>>
>> for some more anecdotal evidence, this is about what i was seeing during
>> my jack1/2 comparison tests. jack2 generally required one buffer size
>> step more to achieve the same xrun robustness as jack1. but i'm
>> generally able to use much lower latencies down to 64 (or 128 in the
>> jack2 case), unless i use jconvolver, which forces me to go to at least
>> 1024 so as not to max out the cpu.
>>
>> i didn't think too much about jack2's apparent overhead, since it has
>> the benefit of scaling to smp, which usually affects the
>> single-processor case (my box is a single-core amd64).
>> it would be interesting to see if torben's approach is able to deliver
>> the same latencies as jack1, while adding smp support.
>>
>> regards,
>>
>> jörn
>
> Well "jack2's apparent overhead," is something new for me, and would require some deeper test/feedback to understand better. Moreover without more precise description of xruns occurrence (at what DSP CPU does it start to happen.. etc..) , what kind of setup (jack2 version, jack configuration, applications used....), it is again hard to understand/correct things.
>
> Stéphane
>
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Received on Thu Jan 28 00:15:05 2010
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