6 Feb
2006
6 Feb
'06
11:51 a.m.
In JACK, if the number of Maximum Ports is increased, does JACK use more system resources?
If not, is there a down side to having a high number of ports?
Ruben
6 Feb
6 Feb
2:01 p.m.
On Mon, 2006-02-06 at 07:52 -0800, Ruben Lopez wrote:
In JACK, if the number of Maximum Ports is increased,
does JACK use more system resources? If not, is there a down side to having a high number
of ports?
it uses more shared memory, yes. each port consumes a relatively small
amount (basically period_size * 4 bytes plus a small constant overhead).
2:29 p.m.
On Mon, 06 Feb 2006 13:03:53 -0500, Paul Davis wrote:
On Mon, 2006-02-06 at 07:52 -0800, Ruben Lopez wrote:
So is this overhead enough to make an significant impact on latency, or is it too minimal
to worry about?
Ruben
In JACK, if the number of Maximum Ports is
increased, does JACK
use more system resources? If not, is there a down side to having
a high number of ports?
it uses more shared memory, yes. each port consumes a relatively
small amount (basically period_size * 4 bytes plus a small constant
overhead).
2:39 p.m.
On Mon, 2006-02-06 at 10:29 -0800, Ruben Lopez wrote:
On Mon, 06 Feb 2006 13:03:53 -0500, Paul Davis
wrote:
either you have the physical RAM to support it (likely), in which case
it doesn't make a lot of difference. or you don't in which case its a
disaster.
the more clients you have and the more memory they touch while running,
the greater is the overhead of JACK's "independent process" model. the
effect is not negligble if you were already close to the limit of the
machine, but if you had plenty of headroom already, its not worth
worrying about.
--p
On Mon, 2006-02-06 at 07:52 -0800, Ruben Lopez
wrote:
So is this overhead enough to make an significant impact on latency, or is it too minimal
to worry about? In JACK, if the number of Maximum Ports is
increased, does JACK
use more system resources? If not, is there a down side to having
a high number of ports?
it uses more shared memory, yes. each port consumes a relatively
small amount (basically period_size * 4 bytes plus a small constant
overhead).
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Ruben Lopez