Re: The performance and behaviour of the anti-fragmentation related patches

William Lee Irwin III
2007-03-03T04:20:19Z

On Fri, 2 Mar 2007, William Lee Irwin III wrote:
>> AIUI that phenomenon is universal to NUMA. Maybe it's time we
>> reexamined our locking algorithms in the light of fairness
>> considerations.

On Fri, Mar 02, 2007 at 07:15:38PM -0800, Christoph Lameter wrote:
> This is a phenomenon that is usually addressed at the cache logic level.
> Its a hardware maturation issue. A certain package should not be allowed
> to hold onto a cacheline forever and other packages must have a mininum
> time when they can operate on that cacheline.

I think when I last asked about that I was told "cache directories are
too expensive" or something on that order, if I'm not botching this,
too. In any event, the above shows a gross inaccuracy in my statement.

-- wli