[LAU] jack2: 32bit vs. 64bit

[Csillag Kristof]

Here are some more details.

- Working on a Debian 64-bit install,
- Stock debian kernel, v3.1.5
- official jack2 v.1.9.7 64-bit packages from Debian,
- Jack works properly with native 64-bit applications, like audicious.
- Specifically testes Pianoteq 64-bit with jack, and it works OK
- manually installed 32-bit jack2 libs (from Debian i386)
- When trying to run pianoteq 32-bit, I get this:

----------------------------
Jack error: Cannot lock down 68157440 byte memory area (Cannot allocate 
memory)
Jack error: Cannot lock down 4196401152 byte memory area (Cannot 
allocate memory                                                    )
Jack error: Cannot lock down 25165824 byte memory area (Cannot allocate 
memory)
Jack error: You cannot set callbacks on an active client
Jack error: You cannot set callbacks on an active client
Jack error: You cannot set callbacks on an active client
Jack error: You cannot set callbacks on an active client
Jack error: You cannot set callbacks on an active client
Segmentation fault
***********************

I was seeing similar error messages with fst and wineasio - both linked 
to the 32-bit jack library, but since they also both involve WINE, they 
are harder to debug, this is I involved Pianoteq in the testing; it's a 
native linux app, available in both 32-bit and 64-bit version.


    * * *

So, it looks like my hybrid 64-bit / 32-bit jack installation is 
dysfunctional.
That's why I am asking this: is this (32-bit jack clients connecting to 
a 64-bit deamon) even supposed to work?

Thank you:

    Kristof



2011-12-18 23:15 keltezéssel, Csillag Kristof írta:
> HI,
>
> Are applications linked with the 32bit  jack2 libraries supposed to be 
> able to connect to the 64bit jack2 deamon running on the same host?
>
> (I am seeing very similar errors from both FST and WineASIO.)
>
> I am running 64-bit Debian, official JACK2 1.9.7 packages,
> and since Debian only ships the jack1 version of the 32bit jack 
> libraries,
> I have manually replaced these with the jack2 versions.
> (Installed them in /usr/lib32.)
>
>   * * *
>
> If this is a problem, then how bad would it be to migrate to a fully 
> 32-bit jack install?
> (On this machine, I only intend to run 32-bit jack clients, and the 
> net back-end.)
>
> What is the performance difference between the 32-bit and 64-bit 
> versions, on a 64-bit system?
>
> Thank you for your help:
>
>     Kristof
>
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