Re: [LAD] tschack ... early version of smp enabled jack1

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

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Received on Thu Jan 28 00:15:04 2010