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Old 01-16-2009, 02:10 AM
Gustin Johnson
 
Default Kernel 2.6.26.8-rt13

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Hash: SHA1

� wrote:

>
> Hello,
>
> unfortunately I have to report some system freezes with runing jack on my 2.1 etch/lenny system.
>
> freezes with these jack's settings:
>
> /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p16 -n3 -D -Chw:0 -Phw:0 -i2 -o2 -Xseq
> /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p32 -n3 -D -Chw:0 -Phw:0 -i2 -o2 -Xseq
> /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p64 -n3 -D -Chw:0 -Phw:0 -i2 -o2 -Xseq
>
> seems to be fine with
> /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p128 -n3 -D -Chw:0 -Phw:0 -i2 -o2 -Xseq
>
> Not heavily loaded Ardour session used for testing ... no plugins at all.

Are we talking about the new 2.6.26 kernel? What sound card is this?
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Old 01-16-2009, 03:49 AM
"Gabriel M. Beddingfield"
 
Default Kernel 2.6.26.8-rt13

Free Ekanayaka wrote:

according to my own tests and to the report on the list, I think
kernel 2.6.28 is not yet stable enough, rt/latency-wise.

So I've just finished packaging a new 2.6.26, with the latest RT
patch, and a further patch recently posted to the linux-rt mailing
list, which fixes an ALSA midi problem.


Tonight... I played with all 3 kernels (2.6.21 64-studio kernel, 2.6.26.8-rt13,
and 2.6.28). They all worked fine for me, and I couldn't really tell much
difference in performance.


Hardware is PIII 500MHz ~384MB RAM. I tried a comb. of
ZynAddSubFx+Ardour+Hydrogen play/record... and didn't get any xruns in any of
the 3 kernels. I was able to set ZynAddSubFx to a patch that caused xruns --
but that was only because the patch was pegging the processor (i.e. not a RT issue).


Thanks for the good work! I'll switch to 2.6.26 like everyone else and watch
for problems.


-Gabriel


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Old 01-16-2009, 09:43 AM
Daniel James
 
Default Kernel 2.6.26.8-rt13

Hi Mira,


unfortunately I have to report some system freezes with runing jack on my 2.1 etch/lenny system.

freezes with these jack's settings:

/usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p16 -n3 -D -Chw:0 -Phw:0 -i2 -o2 -Xseq
/usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p32 -n3 -D -Chw:0 -Phw:0 -i2 -o2 -Xseq
/usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p64 -n3 -D -Chw:0 -Phw:0 -i2 -o2 -Xseq


Those settings are quite weird, you are running two different -p
settings per command line, for example.


Also, -p16 is extremely low latency, I would expect that to cause
problems. Try something like:


/usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p256 -n3

then if that works OK try -p128 and see if you get xruns.

I personally use -r44100 with -p128 -n2 for tracking (and -p256 -n2 for
mastering) with a Delta 1010, but -n3 for any USB or onboard sound
chipset which only opens at -r48000.



PS: I will test latter 3.0 Alpha


Please do, and try Free's new 2.6.26 RT kernel with it. We need lots of
testing on that combination, as it's likely to be the basis of the 3.0
beta release.


Cheers!

Daniel
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Old 01-16-2009, 11:07 AM
Jaromír Mikeš
 
Default Kernel 2.6.26.8-rt13

Hi,

< > unfortunately I have to report some system freezes with runing jack on my 2.1
< etch/lenny system.
< >
< > freezes with these jack's settings:
< >
< > /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p16 -n3 -D -Chw:0 -Phw:0 -i2

< -o2 -Xseq
< > /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p32 -n3 -D -Chw:0 -Phw:0 -i2
< -o2 -Xseq
< > /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p64 -n3 -D -Chw:0 -Phw:0 -i2
< -o2 -Xseq
<
< Those settings are quite weird, you are running two different -p
< settings per command line, for example.


These settings are copy/paste from my .jackdrc file

<
< Also, -p16 is extremely low latency, I would expect that to cause
< problems.


Yes I now ... I tried it just for testing, usually my jack running fine from -p64 and higher with 2.6.21-rt and my own build kernel 2.6.24.7-rt20.

< Try something like:
<
< /usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p256 -n3
<
< then if that works OK try -p128 and see if you get xruns.
<
< I personally use -r44100 with -p128 -n2 for tracking (and -p256 -n2 for
< mastering) with a Delta 1010, but -n3 for any USB or onboard sound
< chipset which only opens at -r48000.


I made a test on onboard card ...so -n3 should be ok for me

latter on I got freeze also with -p128

I did all tests with Nvidia proprietary driver 180.22 on.

Now I switched to free driver and I was able to run jack with -p16 ... some xruns, but not freezes even I tried to provoke them.
And lower system load then my older kernels.


Maybe someone else should confirm or dis-confirm my experience with nvidia 180.22 and 2.6.26.8-rt13 on 686.

mira

BTW: any link for xruns definition? I would like to understand more..
What does it mean the red numbers in brackets?



<
< > PS: I will test latter 3.0 Alpha
<
< Please do, and try Free's new 2.6.26 RT kernel with it. We need lots of
< testing on that combination, as it's likely to be the basis of the 3.0
< beta release.
<
< Cheers!
<
< Daniel
<
<
<
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Old 01-16-2009, 11:12 AM
"Lincoln Spiteri"
 
Default Kernel 2.6.26.8-rt13

The first -p before the driver definition is the number of jack ports IIRC.

On Fri, Jan 16, 2009 at 11:43 AM, Daniel James <daniel@64studio.com> wrote:

Hi Mira,




unfortunately I have to report some system freezes with runing jack on my 2.1 etch/lenny system.



freezes with these jack's settings:



/usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p16 -n3 -D -Chw:0 -Phw:0 -i2 -o2 -Xseq

/usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p32 -n3 -D -Chw:0 -Phw:0 -i2 -o2 -Xseq

/usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p64 -n3 -D -Chw:0 -Phw:0 -i2 -o2 -Xseq




Those settings are quite weird, you are running two different -p settings per command line, for example.



Also, -p16 is extremely low latency, I would expect that to cause problems. Try something like:



/usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p256 -n3



then if that works OK try -p128 and see if you get xruns.



I personally use -r44100 with -p128 -n2 for tracking (and -p256 -n2 for mastering) with a Delta 1010, but -n3 for any USB or onboard sound chipset which only opens at -r48000.




PS: I will test latter 3.0 Alpha




Please do, and try Free's new 2.6.26 RT kernel with it. We need lots of testing on that combination, as it's likely to be the basis of the 3.0 beta release.



Cheers!



Daniel

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Old 01-16-2009, 11:43 AM
dave
 
Default Kernel 2.6.26.8-rt13

Jarom*r Mikeš wrote:


Hi,

I did all tests with Nvidia proprietary driver 180.22 on.

Now I switched to free driver and I was able to run jack with -p16 ...
some xruns, but not freezes even I tried to provoke them.

And lower system load then my older kernels.
Maybe someone else should confirm or dis-confirm my experience with
nvidia 180.22 and 2.6.26.8-rt13 on 686.


mira



Hi Mira,

When I first installed 3.0 alpha I stayed with the "nv" driver for quite
some time and it worked fine.

I am running the 2.6.26.8-rt13 now and using NVIDIA-Linux-x86-173.14.12.
This kernel and graphics driver are working well together for me.
I can use a newer nVidia driver but the one above gives me the best
gui/audio balance.

I haven't tried the nvidia 180.22 but the ones previous to this I've tested
and newer is not always better for my computer needs here.

Cheers!
dave.


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Old 01-16-2009, 12:42 PM
Daniel James
 
Default Kernel 2.6.26.8-rt13

Hi Lincoln,


The first -p before the driver definition is the number of jack ports IIRC.


You're quite right, I checked the man page and it's for the maximum
number of ports - how weird to use the same switch for two completely
different things!


I normally leave this setting on the default of 256 in qjackctl, so it
doesn't show up in my jackd command line.


Cheers!

Daniel
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Old 01-16-2009, 01:01 PM
Daniel James
 
Default Kernel 2.6.26.8-rt13

Hi Mira,


I did all tests with Nvidia proprietary driver 180.22 on.

Now I switched to free driver and I was able to run jack with -p16 ...
some xruns, but not freezes even I tried to provoke them.

And lower system load then my older kernels.


Ah ha...

Maybe someone else should confirm or dis-confirm my experience with
nvidia 180.22 and 2.6.26.8-rt13 on 686.


That would be helpful.


BTW: any link for xruns definition? I would like to understand more..
What does it mean the red numbers in brackets?


According to:
http://www.linuxmao.org/tikiwiki/tiki-pagehistory.php?page=Jack&preview=52


"The bracketed one is the xrun callback count as reported by libjack,
taking qjackctl as a client. The other one (outside the brackets) are
the xrun count as detected by the brute-force method of lurking/parsing
the literal jackd stdout/stderr captured output."


Cheers!

Daniel
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Old 01-16-2009, 01:25 PM
Jaromír Mikeš
 
Default Kernel 2.6.26.8-rt13

< > unfortunately I have to report some system freezes with runing jack on my 2.1
< etch/lenny system.
< >
< > freezes with these jack's settings:
< >
< > /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p16 -n3 -D -Chw:0 -Phw:0 -i2
< -o2 -Xseq
< > /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p32 -n3 -D -Chw:0 -Phw:0 -i2
< -o2 -Xseq
< > /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p64 -n3 -D -Chw:0 -Phw:0 -i2
< -o2 -Xseq
< >
< > seems to be fine with
< > /usr/bin/jackd -R -p128 -t5000 -dalsa -r44100 -p128 -n3 -D -Chw:0 -Phw:0 -i2
< -o2 -Xseq
< >
< > Not heavily loaded Ardour session used for testing ... no plugins at all.
<
< Are we talking about the new 2.6.26 kernel? What sound card is this?

Hello Gustin,

yes we are talking about new 2.6.26.8-rt13 .... and card is just simple on-board Intel card .


Cheers

mira
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Old 01-16-2009, 01:32 PM
Jaromír Mikeš
 
Default Kernel 2.6.26.8-rt13

< > BTW: any link for xruns definition? I would like to understand more..
< > What does it mean the red numbers in brackets?
<
< According to:
< http://www.linuxmao.org/tikiwiki/tiki-pagehistory.php?page=Jack&preview=52


french sites? ;-) english pls.

mira

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