[Ardour-Users] ardour3, netjack, bandwidth, xruns
david.santamauro at gmail.com
Wed Jan 1 05:04:06 PST 2014
Happy new year ... if this isn't the appropriate list, direct to the
right one, thanks.
I've started creating my orchestral template using ardour3 (on the
master) and a slave. When I reach a certain number of tracks the xruns
start piling up.
Wed Jan 1 07:15:08 2014: NetMaster : overloaded, skipping receive from
... does this mean the master is overloaded?
- master is an 8-core/16GB RAM
- slave is 4-core/16GB RAM
Both have Gb network interfaces and both are connected to a Gb switch.
ardour3 does take CPU slices but the master load avg is ~ 85% idle and
DSP load < 20%.
Viewing network traffic using iptraf, I see total usage in the 45Mb/s
(4% utilization) range for both master and slave -- clearly room to
spare so I'm assuming there is some other bottleneck somewhere.
There are no xruns on the slave.
I guess the questions are:
- are there hard limits on the number of tracks that can be used when
using using jack over the network?
- Is there a formula to figure out this out, e.g., is there a
relationship between the size of the jack graph and data per cycle?
- Are there settings (network or for jack_load netmanager) that would
help this situation?
Both master and slave jackd versions are the same:
$ jackd -V
I've read this  and it appears there are two modes: sync and async.
I'll try toggling this and see what happens.
... but any other help would be appreciated.
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