Setting CPU affinity to process( Freebsd smp kernel)

[Daniel Eischen]

On Fri, 23 Feb 2007, Julian Elischer wrote:

> Kunze, Aaron wrote:
>> Thanks for the info.  The Linux equivalent would be sched_setaffinity
>> which takes a bitmask as input, allowing the user to define which
>> processors will run a particular thread.  Here's a link:
>> 
>> http://ibm5.ma.utexas.edu/cgi-bin/man-cgi?sched_setaffinity+2
>> 
>>>> There's a potential for conflict between the kernel's use of pinning and 
>>>> binding for kernel synchronization and the user space affinity model, 
>>>> which will be 
>> 
>> Can you elaborate on this?  Some of my colleagues and I are considering
>> tackling this and would like to avoid such pitfalls, if possible.
>
> [...]
>
>>> 
>>> I know Solaris has processor_bind(2) and pset_bind(2):
>>>
>>>    http://docs.sun.com/app/docs/doc/816-5167/6mbb2jaeu?a=expand#P
>
> I prefer the linux model but it does limit you to some set number of 
> procesors.
> it looks however that the solaris interface doesn't allow 'sets' of 
> processors but
> just allows you to specify a single processor.

Why do you say that?  Solaris has pset_bind(2) as well as other
pset_foo().


-- 
DE