Sense and insanity of using a cache

[Wouter Verhelst]

On Mon, Apr 19, 2010 at 06:50:32AM -0400, Thomas Graf wrote:
> On Thu, Apr 08, 2010 at 03:54:34PM +0200, Wouter Verhelst wrote:
> > I was wondering why libnl enforces the use of a cache; as we are talking
> > to the local kernel, I would guess that any CPU cycles we spare by not
> > having to ask the kernel something would be lost again by the mere fact
> > that there's now a cache to manage.
> > 
> > Am I missing something? More importantly, if speedups is indeed why the
> > cache exists, did anyone actually do any comparisons to see whether it
> > does, indeed, cause the system to be faster?
> 
> Use of caches is not enforced, you may use nl_msg_parse() to parse messages
> and have a callback function invoked for every parsed object instead of
> having it added to a cache.

Oh -- I missed that.

Thanks for pointing it out.

-- 
The biometric identification system at the gates of the CIA headquarters
works because there's a guard with a large gun making sure no one is
trying to fool the system.
  http://www.schneier.com/blog/archives/2009/01/biometrics.html