Re: Linux 2.4.19-rc3 (hyperthreading)

Andrea Arcangeli (andrea@suse.de)
Tue, 30 Jul 2002 02:32:48 +0200


On Tue, Jul 30, 2002 at 02:09:12AM +0200, J.A. Magallon wrote:
> How about this version (gcc-3.2 generates the same amount of assembler):
>
> int find(int this_cpu)
> {
> int i;
>
> for ( i = (this_cpu+1)%smp_num_cpus;
> i != this_cpu;
> i = (i+1)%smp_num_cpus )
> {
> int physical = cpu_logical_map(i);
> int sibling = cpu_sibling_map[physical];
>
> if (idle_cpu(physical) && idle_cpu(sibling))
> return physical;
> }
> return -1;
> }

I also find the above a bit more readable, I'll rediff once more time
then.

Andrea
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