RE: Command for number of cores

Marc Khouzam
2010-08-02T00:38:18Z

>>> p sysconf(_SC_NPROCESSORS_CONF)
>>
>> How do I get GDB to know about the symbol _SC_NPROCESSORS_CONF?
>>
>> And when I call sysconf() does it execute on the host or the target?
>
> This command will let inferior call function sysconf(_SC_NPROCESSORS_CONF).
> _SC_NPROCESSORS_CONF is a enum. In my pc, it's 83. You can run a
> small program that have "printf ("%d", _SC_NPROCESSORS_CONF);" to get
> it's value in your target.
>
> I try "p sysconf(83)" in my part. It works OK.

I'm worried that this is not safe.
I didn't mention the context before, but I want to have Eclipse figure out how many cores
are on the target it is connected to when debugging. Therefore, hard-coding the use of
sysconf(83) is not safe since I don't know the host Eclipse will run on, and even if I did,
I don't know the target of the particular debug session.
Maybe 83 is good for most Linux, but I don't think it is a very safe approach.

Thanks

Marc