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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