Command for number of cores

Hui Zhu teawater@gmail.com
Thu Jul 29 02:21:00 GMT 2010


On Thu, Jul 29, 2010 at 03:02, Marc Khouzam <marc.khouzam@ericsson.com> wrote:
>> -----Original Message-----
>> From: Hui Zhu [mailto:teawater@gmail.com]
>> Sent: Tuesday, July 27, 2010 10:05 PM
>> To: Marc Khouzam
>> Cc: gdb@sourceware.org
>> Subject: Re: Command for number of cores
>>
>> 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.

Thanks,
Hui

>
> Thanks
>
>
>> On Wed, Jul 28, 2010 at 03:55, Marc Khouzam
>> <marc.khouzam@ericsson.com> wrote:
>> > Hi,
>> >
>> > I need a way to know how many cores are on my target (where
>> gdbserver is running).
>> > I'm wondering if GDB already has this information?
>> >
>> > If not, I was thinking of adding 'info cores' or 'show cores'.
>> > Or maybe a convenience variable '$numcores'?
>> >
>> > I'm thinking 'info cores'.
>> >
>> > If this makes sense, I'll give it a try.
>> >
>> > Thanks
>> >
>> > Marc
>> >
>>



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