Real Time Signals In PowerPC Linux

Real Time Signals In PowerPC Linux

[Deepak]

Its regarding realtime signals support in powerpc port of linux. Though
Real-Time signals are supported for Intel i386 port no such support is
available for powerpc port
Anyone having idea about any existing patch for real-time signals in
powerpc linux(linux kernel 2.4.20)

Deepak Gaur
C-DOT 
New Delhi

Re: Real Time Signals In PowerPC Linux

[Benjamin Herrenschmidt]

On Wed, 2005-05-04 at 14:52 +0900, Deepak wrote:
> Its regarding realtime signals support in powerpc port of linux. Though
> Real-Time signals are supported for Intel i386 port no such support is
> available for powerpc port
> Anyone having idea about any existing patch for real-time signals in
> powerpc linux(linux kernel 2.4.20)

What are you talking about ? All architectures have RT signals afaik...

Ben.

Re: Real Time Signals In PowerPC Linux

[Deepak]

hi

  Well I did "kill -l" in linux (v2.4.20) installed on a powerpc board
  and it listed only 32 signals, SIGRTMIN to SIGRTMAX were missing

Deepak 

On Thu, 05 May 2005 17:35:45 +1000, "Benjamin Herrenschmidt"
<benh@kernel.crashing.org> said:
> On Wed, 2005-05-04 at 14:52 +0900, Deepak wrote:
> > Its regarding realtime signals support in powerpc port of linux. Though
> > Real-Time signals are supported for Intel i386 port no such support is
> > available for powerpc port
> > Anyone having idea about any existing patch for real-time signals in
> > powerpc linux(linux kernel 2.4.20)
> 
> What are you talking about ? All architectures have RT signals afaik...
> 
> Ben.
> 
> 

Real Time Signals In Powerpc Linux

[Deepak]

I am working on a linux (v 2.4.20) based powerpc(8260) board. During
development of an application program I planned to use real time
signals(SIGRTMIN to SIGRTMAX) for interprocess communication. On giving
the command 'kill -l' on the terminal window of ppc linux  it displayed
only 32 signals while giving the same command on an Intel based Linux PC
(same kernel version) showed all 64 signals. 

Anyone having idea whether these signals are present in powerpc Linux
kernal v 2.4.20 ?

Deepak Gaur

Re: Real Time Signals In Powerpc Linux

[J. Scott Kasten]

See linux/include/asm-xxx/signal.h in your kernel tree, where xxx is the 
specific arch you are interested in.

You will see definitions for a series of  _NSIG macros.  These define the 
number of available signals and the byte size of the signal mask data 
type.  The stuff at the bottom is educational as well.  You can then 
follow those defines into other header files as needed.

Happy hacking,

J. Scott Kasten
Email: jscottkasten AT yahoo DOT com

On Thu, 5 May 2005, Deepak wrote:

>
> I am working on a linux (v 2.4.20) based powerpc(8260) board. During
> development of an application program I planned to use real time
> signals(SIGRTMIN to SIGRTMAX) for interprocess communication. On giving
> the command 'kill -l' on the terminal window of ppc linux  it displayed
> only 32 signals while giving the same command on an Intel based Linux PC
> (same kernel version) showed all 64 signals.
>
> Anyone having idea whether these signals are present in powerpc Linux
> kernal v 2.4.20 ?
>
> Deepak Gaur
> -
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Re: Real Time Signals In PowerPC Linux

[Benjamin Herrenschmidt]

On Thu, 2005-05-05 at 19:26 +0900, Deepak wrote:
> hi
> 
>   Well I did "kill -l" in linux (v2.4.20) installed on a powerpc board
>   and it listed only 32 signals, SIGRTMIN to SIGRTMAX were missing

Well, I don't know what's up with that kernel you are using, it works
fine here on 2.6.12 but I'm fairly sure it worked with 2.4.20 too. Maybe
a glibc or a kill version issue ?

Ben.

Re: Real Time Signals In PowerPC Linux

[Deepak]

Yes It was indeed the issue of kill command version. I tried sending
SIGRTMAX to a process using kill() and sigqueue() , both of them worked
though 'kill -l' was still showing 32 signals. 

On Fri, 06 May 2005 09:39:18 +1000, "Benjamin Herrenschmidt"
<benh@kernel.crashing.org> said:
> On Thu, 2005-05-05 at 19:26 +0900, Deepak wrote:
> > hi
> > 
> >   Well I did "kill -l" in linux (v2.4.20) installed on a powerpc board
> >   and it listed only 32 signals, SIGRTMIN to SIGRTMAX were missing
> 
> Well, I don't know what's up with that kernel you are using, it works
> fine here on 2.6.12 but I'm fairly sure it worked with 2.4.20 too. Maybe
> a glibc or a kill version issue ?
> 
> Ben.
> 
>