Le 15. 11. 10 22:21, Pierre Massat a écrit :
Hi,
I have installed Ubuntu 10.04 LTS, plus some ubuntu studio stuff (the
audio packages and the plugins). I also tried the rt-kernel. It didn't
work.
But i am amazed, blown away, baffled, etc. Because the generic kernel
does have some crazy rt capabilities indeed. I guess the ubuntu studio
packages must have created the audio group and jack must have written
the proper things in the limit file, but still, it works surprisingly
well. Jack can run in rt with a latency as low 4 ms without any xruns,
although it crashes.It works just fine at 5.33 ms. Even pd itself work
with an extremely low latency (I'd say below 7 ms), I'm assuming
that's because it was configured to run in rt during the install.
I don't even know if i need JACK anymore.
jack don't add latency, and it's a powerfull sound server... you can
connect pd to the outputs of your sound device and/or other sound/midi
softwares, then you can save a patchbay to recover your patch... it's
one of the most interesting stuffs on linux.
Does any of you know how i can measure the actual latency in Pd?
have a look on jdelay: a simple jack command-line latency-meter. when
you start it, a new client appears in jack: connect it between pd out
and in, connect in and out in a pd patch, you'll get a time in frame:
frame/frequency = t in sec (ex 480 / 48000 = 0.010 = 10 ms). You can
connect it between sound device in and out and plug a jack between out
and in, you'll get the real round latency...
you will have to compile it, README explains all...
I couldn't tell by ear which config was faster, Pd alone or Pd plus JACK.
maybe I'm wrong, but I thing only jack can provide rt...
cheers,
r
Looks like it time to say goodbye to rt-kernels...
This makes me happy.
Cheers!
Pierre
2010/11/15 András Murányi <muran...@gmail.com <mailto:muran...@gmail.com>>
So, running the aforementioned RT kernel, managed to patch the
latest nvidia driver following these general instructions:
http://ubuntuforums.org/showpost.php?p=9233282&postcount=5
<http://ubuntuforums.org/showpost.php?p=9233282&postcount=5>
I'm already happy because it's quite some time that i haven't had
the RT kernel!
As i don't use GEM i cannot tell about it, but Pd got faster.
Almost as fast as the 32-bit Pd was (on 64-bit Ubuntu - Hardy that
time). It means i can almost use my MIDI sequencer patch without
the GUI dropping out. Promising! Now i can dig into the patch for
optimisation possibilities, and at the same time, keep on bugging
the community for speeding up the GUI :o)
Do you guys think i shall try it with a current 32-bit Pd to see
if the 64-bit version is really slower...?
(on a side note to RT kernel experiences: the CPU got hotter
indeed, looks like i'll have to tweak the cooling fans again...)
Andras
On Mon, Nov 15, 2010 at 9:27 AM, cyrille henry <c...@chnry.net
<mailto:c...@chnry.net>> wrote:
hello,
195.36.24 is the nvidia driver version i'm using. mainly
because it's the version shiped with ubuntu 10.04.
i don't know what 260 would offer better, but i think it's not
impressive.
most of nvidia upgrade is adding support for new card.
anyway, if you don't use graphics for any important stuff,
then you probably don't care.
i'll be interested to know your impression if you try this
kernel for pd/Gem.
Cyrille
Le 14/11/2010 18:02, András Murányi a écrit :
i'm using Ubuntu Lucid with standard kernel (64-bit), and
performance in
Pd hasn't really impressed me lately... and WHOA i've just
found a PPA
with RT kernel
(https://launchpad.net/~abogani/+archive/ppa/
<https://launchpad.net/%7Eabogani/+archive/ppa/>), which i'm
very interested in - it's just that it comes with older
Nvidia drivers
195.36.24 while the latest drivers from Nvidia are
260.19.21. Now does
anyone know if i'll loose anything important with this
older (but
appropriately patched for RT) graphics driver? (btw i
don't use graphics
for anything important...)
Andras
On Sun, Nov 14, 2010 at 3:25 PM, cyrille henry
<c...@chnry.net <mailto:c...@chnry.net>
<mailto:c...@chnry.net <mailto:c...@chnry.net>>> wrote:
hello,
you say that you need a RT kernel : did you benchmarck the
difference between a RT kernel and a standard kernel?
anyway, i'm using ubuntu 10.04 with no optimisation.
compiling pd/Gem is very fast and easy, so i don't wait
the official
package...
cyrille
Le 14/11/2010 13:48, Pierre Massat a écrit :
Hi all!
I have realized lately that Fedora/PlanetCCRMA may
not be the
best linux
rt distro out there in terms of updates for Pd. So
I wanted to
conduct a
survey among pd-list members to know who is using
what. It seems
like
Ubuntu Studio is the distro that's most frequently
updated. Too bed
because the last time i tried to install it on my
laptop it
didn't work...
Any advice would be appreciated.
I need a rt kernel, of course...
Pierre
_______________________________________________
Pd-list@iem.at <mailto:Pd-list@iem.at> mailing list
UNSUBSCRIBE and account-management ->
http://lists.puredata.info/listinfo/pd-list
_______________________________________________
Pd-list@iem.at <mailto:Pd-list@iem.at> mailing list
UNSUBSCRIBE and account-management ->
http://lists.puredata.info/listinfo/pd-list
--
Muranyi Andras
_______________________________________________
Pd-list@iem.at <mailto:Pd-list@iem.at> mailing list
UNSUBSCRIBE and account-management ->
http://lists.puredata.info/listinfo/pd-list
_______________________________________________
Pd-list@iem.at mailing list
UNSUBSCRIBE and account-management ->
http://lists.puredata.info/listinfo/pd-list
_______________________________________________
Pd-list@iem.at mailing list
UNSUBSCRIBE and account-management ->
http://lists.puredata.info/listinfo/pd-list
