Re: [Linux-ia64] Re: [PATCH] topology for ia64

Michael Hohnbaum
2002-10-29T22:35:28Z

On Tue, 2002-10-29 at 14:19, Matthew Dobson wrote:
> Erich Focht wrote:
> +/*
> + * Returns the number of the first CPU on Node 'node'.
> + * Slow in the current implementation.
> + * Who needs this?
> + */
> +/* #define __node_to_first_cpu(node) pool_cpus[pool_ptr[node]] */
> +static inline int __node_to_first_cpu(int node)
>
> No one is using it now. I think that I will probably deprecate this
> function in the near future as it is pretty useless. Anyone looking for
> that functionality can just do an __ffs(__node_to_cpu_mask(node))
> instead, and hope that there is a reasonably quick implementation of
> __node_to_cpu_mask.
>
I'm using this in the simple NUMA scheduler. This is quite useful
for iterating through a specific node's CPUs. Yes, the functionality
can be obtained in a different manner, but is less obvious.

--

Michael Hohnbaum 503-578-5486
hohnbaum@us.ibm.com T/L 775-5486