Upper limit on make -j ?

Brian bri at numail.brianwhalen.net
Tue Nov 27 23:23:35 PST 2007

There's a thread on the -stable list about 8 cores being an issue in a 
very specific case.  I couldn't imagine setting j to something more than 
2x or 3x at the most of your available cores.


On Tue, 27 Nov 2007, Aryeh M. Friedman wrote:

> Hash: SHA1
> Brian wrote:
>> Isn't 1000 an unrealistically high value?
> For the next few years maybe but with core counts going up I can
> easily see a 512 or 1024 core machine by say 2015.. i.e. Moore's law
> may not apply to single tasking chips any mores but it seems to be in
> full force for multi-core ones... this brings me to why I tried it in
> the first place I was exploring weither or not FreeBSD was ready for
> this kind of core count (specifically the idea of a multitasking OS
> scheduling by allocating one process per core for core counts greater
> then say 64)... I am in the process of considering the design
> requirements for a OS I plan to do from the ground up and like to know
> the limits of current ones.
> - --
> Aryeh M. Friedman
> Developer, not business, friendly
> http://www.flosoft-systems.com
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