[Barrelfish-users] set the number of cores

[Antonio Barbalace]

Hi Gerd,

thank you very much! That worked!

I am now basically setting cores_on_boot variable in
usr/kaluga/start_cpu.c:watch_for_cores(void) function to the number of
cores I want.

bests,
Antonio


On Wed, Nov 26, 2014 at 5:07 AM, Gerd Zellweger <gerd.zellweger at inf.ethz.ch>
wrote:

> Hi Antonio,
>
> If you are running Kaluga it will automatically listen for new core events
> from ACPI and start the cores accordingly.
>
> Have a look at
> http://git.barrelfish.org/?p=barrelfish;a=blob_plain;f=usr/
> kaluga/start_cpu.c;hb=HEAD
> if you want to tune the behaviour or suppress cores being booted.
>
> If you want to directly modify the core discovery in ACPI, it is done here
> (line 182ff):
> http://git.barrelfish.org/?p=barrelfish;a=blob;f=usr/acpi/interrupts.c;h=
> 87a1dbc95340485c11db3ebb63e6d407c5f57dcc;hb=HEAD
>
> Also note that we will shortly release a new core management
> infrastructure based on our work for OSDI this year that will make core
> management much simpler.
>
> Hope this helps,
> Gerd
>
>
> On 2014-11-26 00:44, Antonio Barbalace wrote:
>
>> Dear all,
>>
>> I am trying to boot Barrelfish on a reduced number of cores.
>>
>> The following line in the menu.lst does not have any effect:
>> module  /barrelfish/x86_64/sbin/spawnd boot bootapic-x86_64=1-8
>>
>> I also try to manually modify different source files but without any
>> luck.
>> For example I modified the macro MAX_COREID but it was giving a
>> compiler error,
>> I also modified usr/spawnd/bsp_bootup.c in different ways, again
>> nothing.
>>
>> any suggestion is very welcome!
>> thanks,
>> Antonio
>>
>> --
>>
>> Dr. Eng. Antonio Barbalace, PhD
>> Systems Software Research Group (SSRG)
>> Bradley Department of Electrical and Computer Engineering
>> Virginia Tech
>> 453 Durham Hall (0111)
>> Blacksburg, VA 24061
>> phone: +1 (540) 231-2494 [1]
>> email: antoniob at vt.edu
>>
>> Links:
>> ------
>> [1] tel:%2B1%20%28540%29%20231-2494
>>
>> _______________________________________________
>> Barrelfish-users mailing list
>> Barrelfish-users at lists.inf.ethz.ch
>> https://lists.inf.ethz.ch/mailman/listinfo/barrelfish-users
>>
>


-- 
Dr. Eng. Antonio Barbalace, PhD
Systems Software Research Group (SSRG)
Bradley Department of Electrical and Computer Engineering
Virginia Tech
453 Durham Hall (0111)
Blacksburg, VA 24061
phone: +1 (540) 231-2494
email: antoniob at vt.edu
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://lists.inf.ethz.ch/pipermail/barrelfish-users/attachments/20141126/cc307ed1/attachment.html