Re: Supported architectures

[Vara Prasad <prasadav at us dot ibm dot com>]

Eugeniy Meshcheryakov wrote:

> Hello,
>
> Currently Debian package for systemtap builds on all release
> architectures, but I think it is not useful on some of them. So, I am
> going to drop support of those architectures.
>
> I cannot find list of supported architectures in systemtap's source or
> website, so I'll try to guess.
>  
O.K, good feedback we will try to add a section on the web site to 
indicate supported architectures, thanks.

> src/runtime contains the following files:
> stack-x86_64.c
> stack-ia64.c
> stack-ppc64.c
> stack-s390.c
>  
We also support regular 32bit x86.

> Are that all of supported architectures? 
Do you have interest for any other architectures support?

> Is it possible to use systemtap
> on 64-bit ppc system with 32-bit userspace (including stap, staprun,
> lket-b2a ...)? 
I believe one should able to run 32bit user space tools although kernel 
has support only for 64bit PPC. Guanglei can you confirm if b2a tool 
works fine if built in 32 bit mode? Ananth/Amit have we tested 32bit 
user space tools support for systemtap?

Although IBM usually recommends building user space tools in 32 bit mode 
even for 64bit PPC kernels for performance reasons in this particular 
case we don't see a big advantage of it, so if you want to support only 
one version of user space tools you can choose to build all the user 
space tools only in 64bit and no need to build 32bit.


> stack-s390.c contains code that prints registers content
> using 16 hexadecimal digits. Is it really support for s390x? Or both?
> Is it possible to use 31-bit version of stap with 64-bit kernel in this
> case?
>
>  
Yes technically it is possible to use 31 bit user space tools with 64bit 
kernel but systemtap is not tested that way at this time. As Dave 
replied you only need to carry 64bit user space tools for systemtap on 
s390 at this time.

Please let me know if you have any further questions.